Abstract

Embodiments of the present invention relate to control apparatus and methods of a printing system, for example, comprising an intermediate transfer member (ITM) and to user-related features of a printing system. Some embodiments relate to regulation of a velocity and/or tension and/or length of the ITM. Some embodiments relate to regulation of deposition of ink on the moving ITM. Some embodiments regulate to apparatus configured to alert a user of one or more events related to operation of the ITM. Some embodiments relate to a time-line GUI for visualizing and/or manipulating queued print jobs which may be employed. Some embodiments relate to a reversed augmented reality GUI for visualization and/or control of the printing system. In some embodiments, a display screen is mounted to a printer housing and/or able to control access to moving parts of a printing system.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material

Abstract

An ink film construction comprising: (a) a printing substrate; and (b) at least one ink film, fixedly adhered to a top surface of the printing substrate, the ink film having an upper film surface distal to the top surface of the substrate, wherein a surface concentration of nitrogen at the upper film surface exceeds a bulk concentration of nitrogen within the film, the bulk concentration measured at a depth of at least 30 nanometers below the upper film surface, and wherein a ratio of the surface concentration to the bulk concentration is at least 1.1 to 1.

IPC Classes  ?

• C09D 11/30 - Inkjet printing inks
• B32B 3/10 - Layered products essentially comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products essentially having particular features of form characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material
• B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
• B41F 16/00 - Transfer printing apparatus
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 2/01 - Ink jet
• C09D 11/107 - Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
• C09D 11/322 - Pigment inks
• C09D 125/08 - Copolymers of styrene
• C09D 125/14 - Copolymers of styrene with unsaturated esters
• G03G 15/14 - Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base

Abstract

A system includes: (a) a flexible intermediate transfer member (ITM) including multiple layers and markers including: (i) a structure engraved, in at least one of the layers, at respective marking locations along the ITM, and (ii) at least part of the structure is filled with a filling material that changes one or both of optical and magnetic properties of the ITM, the ITM includes an outer layer for receiving ink droplets, and transferring the ink image to a target substrate, (b) sensing assemblies disposed at respective predefined locations relative to the ITM, and configured to produce signals indicative of respective positions of the markers, and (c) a processor, which is configured to receive the signals, and based on the signals, to control a deposition of the ink droplets on the ITM, and the processor is configured to detect a deformation of the ITM based on the first and second signals.

IPC Classes  ?

• B41J 3/46 - Printing mechanisms combined with apparatus providing a visual indication
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 2/175 - Ink supply systems
• B41J 29/393 - Devices for controlling or analysing the entire machine

Abstract

Embodiments of the invention relate to a method of indirect printing with an aqueous ink. In some embodiments, this method is performed with (i) a first aqueous ink component, the first aqueous ink component optionally being transparent; and (ii) a second aqueous ink component comprising colorant particles. Related apparatus, systems and treatment formulations are disclosed herein.

IPC Classes  ?

• B41M 5/025 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
• B41J 2/01 - Ink jet
• B41J 2/21 - Ink jet for multi-colour printing
• B41M 5/00 - Duplicating or marking methods; Sheet materials for use therein
• B41M 7/00 - After-treatment of printed works, e.g. heating, irradiating
• C09D 11/107 - Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
• C09D 11/322 - Pigment inks
• C09D 11/40 - Ink-sets specially adapted for multi-colour inkjet printing

Abstract

A system includes (a) an image forming station including multiple print bars arranged along an axis and configured to apply to a substrate being moved along the axis, droplets of printing fluids having multiple colors, respectively, and (b) multiple dryers, which are mounted on the image forming station, and are interleaved with the multiple print bars along the axis, the multiple dryers are configured to dry the droplets applied to the substrate for forming an image on the substrate, at least a dryer among the dryers includes: (i) an illumination assembly, which is configured to dry the droplets by directing the optical radiation to impinge on the substrate, and (ii) a temperature control assembly, which is configured to control a temperature of the substrate by directing a gas to the substrate, the illumination assembly and the temperature control assembly are packaged together in a housing.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41M 5/025 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet

Abstract

A method including receiving a first signal indicative of a first electrical current measured on a first motion assembly (77) for moving a flexible substrate (44) that receives droplets of a printing fluid from an image forming station (60) to form an image thereon. A second signal indicative of a second electrical current measured on a second motion assembly (99) for moving the flexible substrate (44), is received, wherein a section of the flexible substrate (44) is moving between the first motion assembly (77) and the second motion assembly (99). A parameter, which is indicative of a distortion in the image, is calculated based on the first signal and the second signal. In response to detecting, based on the parameter, an increase in the distortion, a corrective action is applied to reduce the distortion.

IPC Classes  ?

• B41J 29/38 - Drives, motors, controls, or automatic cut-off devices for the entire printing mechanism
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 2/21 - Ink jet for multi-colour printing
• G06F 3/12 - Digital output to print unit

Abstract

A system includes an image forming station, which is configured to apply droplets of one or more printing fluids to a target substrate, so as to form an image thereon, and a substrate conveyor, which includes one or more perforated plates having multiple openings, and is configured to grip and move the target substrate to and from the image forming station for forming the image, the substrate conveyor includes one or more rotatable elements, which are fitted in the respective openings, and are configured to provide mechanical support to the target substrate, and when the target substrate moves over the one or more rotatable elements, at least one of the rotatable elements is configured to rotate in response to a physical contact with the target substrate.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 13/00 - Devices or arrangements specially adapted for supporting or handling copy material in short lengths, e.g. sheets
• B41J 13/22 - Clamps or grippers
• B65H 5/06 - Feeding articles separated from piles; Feeding articles to machines by rollers
• B65H 29/04 - Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
• B65H 5/08 - Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers

Abstract

A digital printing system includes an intermediate transfer member (ITM), to receive a printing fluid to form an image, a continuous target substrate having opposing first surface and second surface, a light source to illuminate the first surface, and an image sensor to image at least a portion of the light transmitted through the target substrate to the second surface, and a processor. The target substrate configured to engage with the ITM at an engagement point for receiving the image from the ITM, and at the engagement point, the ITM is configured to move at a first velocity and the target substrate is configured to move at a second velocity. The processor is configured to produce a digital image based on the electrical signals, and to estimate, based on the digital image, at least a distortion in the image.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form

Abstract

A printing system comprises an intermediate transfer member, an image-forming station comprising a print bar disposed over a surface of the ITM, a conveyer for driving rotation of the ITM, a detection system configured to detect foreign matter transported at a detection location upstream of the image-forming station, and a response system operatively coupled to the detection system to respond to the detection of foreign matter by performing at least one collision-prevention action to prevent a potential collision between foreign matter and the print bar.

IPC Classes  ?

• B41J 29/387 - Automatic cut-off devices
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers

Abstract

Embodiments of the invention relate to a method of indirect printing with an aqueous ink. In some embodiments, an intermediate transfer member (ITM) comprising a silicone-based release layer surface is employed. For example, the release layer surface satisfies at least one of the following properties: (i) a receding contact angle of a drop of distilled water deposited on the silicone-based release layer surface is at most 60°; and (ii) a 10-second dynamic contact angle (DCA) of a drop of distilled water deposited on the silicone-based release layer surface is at most 108°. Related apparatus, systems and treatment formulations are disclosed herein.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41M 5/025 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
• B41M 5/03 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by pressure
• C09D 11/322 - Pigment inks
• C09D 11/38 - Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
• C09D 11/54 - Inks based on two liquids, one liquid being the ink, the other liquid being a reaction solution, a fixer or a treatment solution for the ink

Abstract

The present disclosure relates to water-based inkjet ink formulations comprising a solvent containing water, at least one coloring agent, and at least one alkali-metal organosiliconate of Formula (I) Formula (I) wherein: R is C1-C5 alkyl group; Mi, M2, and M3 are each, independently of the other, selected from hydrogen or a cation of an alkali metal, wherein at least one of the Mi, M2 and M3 is a cation of an alkali metal. The water-based inkjet ink formulations are used in methods for preventing or minimizing print head deterioration. The present disclosure further relates to printing methods utilizing the water-based inkjet ink formulations and to printing systems comprising said formulations.

IPC Classes  ?

• C09D 11/107 - Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
• C09D 11/38 - Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
• C09D 11/322 - Pigment inks
• B41J 3/407 - Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material

Abstract

An indirect printing system is disclosed having an intermediate transfer member (ITM) in the form of an endless belt that circulates during operation to transport ink images from an image forming station. Ink images are deposited on an outer surface of the ITM by one or a plurality of print bars. At an impression station, the ink images are transferred from the outer surface of the ITM onto a printing substrate. In some embodiments, the outer surface of the ITM 20 is maintained within the image forming station at a predetermined distance from the one or each of the print bars 10, 12, 14 and 16 by means of a plurality of support rollers 11, 13, 15, 17 that have a common flat tangential plane and contact the inner surface of the ITM. In some embodiments, the inner surface of the ITM is attracted to the support rollers, the attraction being such that the area of contact between the ITM and each support roller is greater on the downstream side than the upstream side of the support roller, referenced to the direction of movement of the ITM.

IPC Classes  ?

• B41J 2/01 - Ink jet

Abstract

A printing system comprises an intermediate transfer member (ITM), an image forming station, a conveyer for driving rotation of the ITM, and a treatment station disposed downstream of the impression station and upstream of the image forming station configured for coating the ITM surface with a layer of a liquid treatment formulation, the treatment station comprising an applicator for applying the liquid treatment formulation to the ITM, a coating thickness-regulation assembly comprising a plurality of blades, a blade-replacement mechanism, and a blade-replacement controller for controlling the blade-replacement mechanism.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41J 2/01 - Ink jet

Abstract

Embodiments of the invention relate to a method of indirect printing with an aqueous ink. Related apparatus, systems and treatment formulations are disclosed herein. Some embodiments relate to an aqueous treatment formulation for use with an intermediate transfer member of a printing system. In some embodiments, the system comprises a treatment station disposed downstream of the impression station and upstream of the image forming station for forming a uniform thin layer of a liquid treatment formulation onto a surface of an intermediate transfer member (ITM) at a lower run thereof.

IPC Classes  ?

• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material

Abstract

Embodiments of the invention relate to a method of indirect printing with an aqueous ink formulation applied to the surface of the intermediate transfer member. Related apparatus, systems and treatment formulations are disclosed herein.

IPC Classes  ?

• B41M 5/025 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 2/14 - Structure thereof
• B41M 5/00 - Duplicating or marking methods; Sheet materials for use therein
• B41M 5/03 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by pressure
• C09D 129/04 - Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
• C09D 7/65 - Additives macromolecular
• B41J 2/21 - Ink jet for multi-colour printing
• C09D 7/40 - Additives
• B41J 2/01 - Ink jet
• C09D 11/322 - Pigment inks

Abstract

Ink formulations suitable for deposition upon the intermediate transfer member of an indirect printing system and for transfer therefrom to a substrate. The inks are aqueous inkjet inks comprising an organic polymeric resin and a colorant. Ink film constructions including a plurality of continuous ink films fixedly adhered to the printing substrate that can be obtained with these inks are also disclosed. The inks and the printed constructions are such that the ink films and the dried inks composing them have a first dynamic viscosity within a range of 106 cP to 5·107 cP at at least a first temperature within a first range of 60° C. to 87.5° C., and a second dynamic viscosity of at least 6·107 cP, for at least a second temperature within a second range of 50° C. to 55° C.

IPC Classes  ?

• C09D 11/107 - Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
• C09D 11/106 - Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• C09D 11/30 - Inkjet printing inks
• C09D 11/38 - Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
• C09D 11/104 - Polyesters

Abstract

A printing system for printing on a substrate, comprises a movable intermediate transfer member in the form of a flexible, substantially inextensible, belt guided to follow a closed path, an image forming station for depositing droplets of a liquid ink onto an outer surface of the belt to form an ink image, a drying station for drying the ink image on the belt to leave an ink residue film on the outer surface of the belt, first and second impression stations spaced from one another in the direction of movement of the belt, each impression station comprising an impression cylinder for supporting and transporting the substrate and a pressure cylinder carrying a compressible blanket for urging the belt against the substrate supported on the impression cylinder, and a transport system for transporting the substrate from the first impression station to the second impression station .The pressure cylinder of at least the first impression station is movable between a first position in which the belt is urged towards the impression cylinder to cause the residue film on the outer surface of the belt to be transferred onto the front side of the substrate supported on the impression cylinder, and a second position in which the belt is spaced from the impression cylinder to allow the ink image on the belt to pass through the first impression station and arrive intact at the second impression station for transfer onto the reverse side of the substrate supported on the second impression cylinder.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 3/60 - Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing on both faces of the printing material

Abstract

Some embodiments relate to printing system is described that has an intermediate transfer member (ITM) in the form of a seamed endless belt for transporting an ink image from an image forming station, at which an ink image is deposited on ITM, to an impression station, where the ink image is transferred onto a printing substrate. Two drive members are provided for movement in synchronism with one another. Rotation of the drive members during installation of a new ITM serves to thread the strip through the printing system by pulling the strip from its leading end. Alternatively or additionally, indirect printing system comprising the ITM and an image forming station at which droplets of ink are applied to the ITM to form ink images thereon is disclosed. One or more blowing mechanisms (e.g. associated with the image forming station) are disclosed herein.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41J 13/08 - Bands or like feeding devices
• B41J 15/04 - Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
• B41J 15/16 - Means for tensioning or winding the web
• B65G 17/32 - Individual load-carriers
• G03G 15/16 - Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern
• B41J 2/01 - Ink jet

Abstract

An intermediate transfer member (ITM) for use with a printing system, the ITM having (a) a support layer; and (b) a release layer having an ink reception surface and a second surface opposing the ink reception surface, the second surface attached to the support layer, the release layer formed of an addition-cured, hydrophobic silicone material, wherein the release surface of the release layer has relatively hydrophilic properties with respect to the addition-cured, hydrophobic silicone material.

IPC Classes  ?

• B41J 2/22 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression- transfer material
• B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
• B32B 7/06 - Interconnection of layers permitting easy separation
• B32B 7/12 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties
• B32B 15/14 - Layered products essentially comprising metal next to a fibrous or filamentary layer
• B32B 15/20 - Layered products essentially comprising metal comprising aluminium or copper
• B32B 25/08 - Layered products essentially comprising natural or synthetic rubber comprising rubber as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin
• B32B 25/20 - Layered products essentially comprising natural or synthetic rubber comprising silicone rubber
• B32B 27/18 - Layered products essentially comprising synthetic resin characterised by the use of special additives
• B32B 27/36 - Layered products essentially comprising synthetic resin comprising polyesters
• G03G 7/00 - Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
• B32B 7/02 - Physical, chemical or physicochemical properties
• B32B 37/26 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer which influences the bonding during the laminating process, e.g. release layers or pressure equalising layers
• B32B 27/28 - Layered products essentially comprising synthetic resin comprising copolymers of synthetic resins not wholly covered by any one of the following subgroups
• B32B 27/40 - Layered products essentially comprising synthetic resin comprising polyurethanes
• B32B 37/24 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate

Abstract

A friction reduction system for reducing friction of an intermediate transfer member (ITM) of a printing system, while the ITM is guided along the printing system by a guiding arrangement. The friction reduction system includes a fluid reservoir mounted within the printing system, a fluid depositing arrangement disposed along the ITM, and a control mechanism, adapted to control depositing of fluid, from the fluid depositing arrangement onto the guiding arrangement or onto at least a portion of the ITM. Depositing of the fluid reduces friction between the ITM and the guiding arrangement.

IPC Classes  ?

• B41J 2/01 - Ink jet
• B41J 2/21 - Ink jet for multi-colour printing
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form

Abstract

A method includes, receiving a first digital image (FDI) to-be printed by a digital printing system (DPS) (10). In a in training phase: for first selected regions (111) in the FDI, a first set of synthetic images (SIs) (112A, 112B, 114A, 114B, 116A, 116B) having a defect caused by a defective part (DP) (99) in the first selected regions, is produced; a neural network (NN) (150) is trained to detect the defect using the first set SIs. In a subsequent detection phase: the NN is applied for identifying, in a second digital image (SDI) (136, 146) acquired from an image produced by the DPS, suspected second regions (135, 145); for each of the second regions, a second set (137, 147) of SIs having DPs that form the defects, is produced; and the DP is identified by comparing, in each of the second regions, between the SDI and the second set SIs.

IPC Classes  ?

• B41J 2/21 - Ink jet for multi-colour printing
• G06N 3/0464 - Convolutional networks [CNN, ConvNet]
• G06T 7/00 - Image analysis

Abstract

A digital printing system includes a print head and a processor. The print head is configured to jet droplets of ink. The a processor is further configured to translate a required shade of a color, to be printed at a given location on a substrate by the print head, into a sequence of pulses, the sequence including: (a) up to a predefined maximum number of driving pulses that cause the print head to jet respective droplets, and (b) a tickling pulse, which has a smaller amplitude than the driving pulses and which causes the print head to jet a droplet smaller than the droplets jetted in response to the driving pulses. The processor is additionally configured to apply the sequence of pulses to the print head.

IPC Classes  ?

• B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
• B41J 2/21 - Ink jet for multi-colour printing

Abstract

A system and method for performing quality control in a digital printing system (DPS) is provided. The DPS includes an impression station for transferring an ink image from a surface of an intermediate transfer member to a substrate. The impression station includes an impression cylinder housing one or more grippers operable to grasp and hold a leading edge of the substrate as it passes through the DPS, for conveying the substrate along the impression cylinder during the transfer of the ink image. An imaging device is operable, during advancement of the substrate on the impression cylinder, to capture a digital image including a region of interest (ROI) that is associated with at least a portion of the grippers and at least a portion of the substrate. A controller is configured, based on the digital image, to indicate an error in a position of the substrate relative to the grippers.

IPC Classes  ?

• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 13/22 - Clamps or grippers

Abstract

A printing process is disclosed which comprises directing droplets of an ink onto an intermediate transfer member to form an ink image, the ink including an organic polymeric resin and a coloring agent in an aqueous carrier, and the transfer member having a hydrophobic outer surface so that each ink droplet in the ink image spreads on impinging upon the intermediate transfer member to form an ink film. The ink is dried while the ink image is being transported by the intermediate transfer member by evaporating the aqueous carrier from the ink image to leave a residue film of resin and coloring agent. The residue film is then transferred to a substrate. The chemical compositions of the ink and of the surface of the intermediate transfer member are selected such that attractive intermolecular forces between molecules in the outer skin of each droplet and on the surface of the intermediate transfer member counteract the tendency of the ink film produced by each droplet to bead under the action of the surface tension of the aqueous carrier, without causing each droplet to spread by wetting the surface of the intermediate transfer member.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41M 5/025 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet

Abstract

Methods for printing using printing systems comprising a flexible intermediate transfer member (ITM) disposed around a plurality of guide rollers at which encoders are installed, and an image-forming station at which ink images are formed by droplet deposition by print bars onto the ITM, can include measuring a local velocity of the ITM under one of the print bars, determining a stretch factor for a portion of the ITM based on a relationship between an estimated stretched length fixed physical distance between print bars, controlling an ink deposition parameter according to the stretch factor so as to compensate for stretching of the reference portion of the ITM.

IPC Classes  ?

• B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 2/03 - Ink jet characterised by the jet generation process generating a continuous ink jet by pressure
• B41J 2/155 - Arrangement thereof for line printing

Abstract

There are disclosed aqueous pigment dispersions containing dispersant-improving-agents, and methods of preparing and using the same.

IPC Classes  ?

• C09D 17/00 - Pigment pastes, e.g. for mixing in paints
• C08K 5/098 - Metal salts of carboxylic acids
• C08K 5/42 - Sulfonic acids; Derivatives thereof
• C08L 33/08 - Homopolymers or copolymers of acrylic acid esters
• C08L 33/14 - Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen
• C08L 53/00 - Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
• C08L 71/02 - Polyalkylene oxides
• C09B 67/04 - Grinding or milling
• C09B 67/46 - Dispersions

Abstract

Printing apparatus (20) includes a continuous blanket (24) and a set of motorized rollers (31), which advance the blanket at constant speed through an image area. Print bars (38) eject droplets of ink at respective locations onto the blanket in the image area. Monitoring rollers (42), in proximity to the locations of the print bars, contact the blanket to be rotated by blanket advancement. Each monitoring roller includes an encoder (44), which outputs a signal indicative of a rotation angle of the monitoring roller. A control unit (40) collects, during a calibration phase, the signal from the encoders over multiple rotations of the monitoring rollers, detects a deviation of the signal from the encoder relative to a clock signal having a predefined frequency, and computes runout correction factors. During an operational phase, the control unit applies the runout correction factors to synchronize the droplets ejection from the print bars.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 3/46 - Printing mechanisms combined with apparatus providing a visual indication
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41J 11/13 - Backings or blankets

Abstract

A method of printing includes, applying to an intermediate transfer member (ITM) (44), one or more fluids that include at least a printing fluid for forming an image on the ITM (44). At least part of the image is transferred from the ITM (44) to a target substrate (50). Residues of the one or more fluids that were not transferred to the target substrate (50) and remained on the ITM (44), are transferred from the ITM (44) to one or more rotatable elements (112), and the residues are removed from the one or more rotatable elements (112).

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• G03G 15/16 - Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern

Abstract

A system includes: (a) a flexible intermediate transfer member (ITM) including multiple layers and markers including: (i) a structure engraved, in at least one of the layers, at respective marking locations along the ITM, and (ii) at least part of the structure is filled with a filling material that changes one or both of optical and magnetic properties of the ITM, the ITM includes an outer layer for receiving ink droplets, and transferring the ink image to a target substrate, (b) sensing assemblies disposed at respective predefined locations relative to the ITM, and configured to produce signals indicative of respective positions of the markers, and (c) a processor, which is configured to receive the signals, and based on the signals, to control a deposition of the ink droplets on the ITM, and the processor is configured to detect a deformation of the ITM based on the first and second signals.

IPC Classes  ?

• B41J 3/46 - Printing mechanisms combined with apparatus providing a visual indication
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 2/175 - Ink supply systems
• B41J 29/393 - Devices for controlling or analysing the entire machine
• B41J 2/01 - Ink jet

Abstract

An impression station of a printing system comprises a rotatable impression cylinder with an impression cylinder gap housing a plurality of grippers recessed therein. A pressure cylinder assembly comprises a pressure cylinder comprising a pressure cylinder gap and an angle portion joining a trailing edge of the pressure cylinder gap and an outer circumferential surface of the pressure cylinder. A compressible blanket is disposed around the circumference of the pressure cylinder. A margin insert is interposed between the pressure cylinder and the compressible blanket at least at the angle portion, such that a local external geometry of the pressure cylinder assembly at the angle portion is changed by the presence of the margin insert. The change in the local external geometry of the pressure cylinder assembly due to the presence of the margin insert is effective to reduce a dimension of an unprinted leading-edge margin.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 13/22 - Clamps or grippers
• B41F 21/05 - In-feed grippers

Abstract

Embodiments of the invention relate to a method of indirect printing with an aqueous ink. Related apparatus, systems and treatment formulations are disclosed herein. Some embodiments relate to an aqueous treatment formulation for use with an intermediate transfer member of a printing system. In some embodiments, the system comprises a treatment station disposed downstream of the impression station and upstream of the image forming station for forming a uniform thin layer of a liquid treatment formulation onto a surface of an intermediate transfer member (ITM) at a lower run thereof.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41J 2/01 - Ink jet

Abstract

A system (10, 110) includes: (i) a flexible intermediate transfer member (ITM) (44, 500, 600), including: a stack of: In (a) a first layer (602), located at an outer surface of the ITM (44, 500, 600), configured to receive ink droplets to form an ink image thereon, and to transfer the ink image to a target substrate (50, 51), and (b) a second layer (603) including a matrix holding particles (622), configured to receive optical radiation (99) passing through the first layer (602), and to heat the ITM (44, 500, 600) by absorbing the optical radiation (99); (ii) an illumination assembly (113), configured to dry the ink droplets by directing the optical radiation (99) to impinge on the particles (622); and (iii) a temperature control assembly (121), configured to control a temperature of the ITM (44, 500, 600) by directing a gas (101) to the ITM (44, 500, 600).

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41M 5/025 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet

Abstract

A digital printing system (10) includes a flexible substrate (44), an optical assembly (200, 301) and a processor (20). The flexible substrate (44) has a periodic pattern, and is configured to be moved and to receive ink droplets in a printing process that forms an image thereon. The optical assembly (200, 301) is configured to illuminate the flexible substrate (44) with light (215, 315), to detect the light (215, 315) from the flexible substrate (44), and to derive from the detected light (215, 315) a signal indicative of the periodic pattern. The processor (20) is configured to receive the signal and to monitor or control the digital printing system (10) based on the periodic pattern as indicated by the signal.

IPC Classes  ?

• G03G 15/00 - Apparatus for electrographic processes using a charge pattern
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• G03G 15/16 - Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern

Abstract

A flexible belt is disclosed for use in a printing system. The belt comprises an endless strip which, in use, travels along a continuous path. Formations are provided along the sides of the strip which are capable of engaging with lateral tracks to place the belt under lateral tension, the lateral tracks further serving to constrain the belt to follow the continuous path.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material

Abstract

An intermediate transfer member (ITM) for use with a printing system, the ITM having (a) a support layer; and (b) a release layer having an ink reception surface and a second surface opposing the ink reception surface, the second surface attached to the support layer, the release layer formed of an addition-cured, hydrophobic silicone material, wherein the release surface of the release layer has relatively hydrophilic properties with respect to the addition-cured, hydrophobic silicone material.

IPC Classes  ?

• B41J 2/22 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression- transfer material
• B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
• B32B 7/06 - Interconnection of layers permitting easy separation
• B32B 7/12 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties
• B32B 15/14 - Layered products essentially comprising metal next to a fibrous or filamentary layer
• B32B 15/20 - Layered products essentially comprising metal comprising aluminium or copper
• B32B 25/08 - Layered products essentially comprising natural or synthetic rubber comprising rubber as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin
• B32B 25/20 - Layered products essentially comprising natural or synthetic rubber comprising silicone rubber
• B32B 27/18 - Layered products essentially comprising synthetic resin characterised by the use of special additives
• B32B 27/36 - Layered products essentially comprising synthetic resin comprising polyesters
• G03G 7/00 - Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
• B32B 37/26 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer which influences the bonding during the laminating process, e.g. release layers or pressure equalising layers
• B32B 27/28 - Layered products essentially comprising synthetic resin comprising copolymers of synthetic resins not wholly covered by any one of the following subgroups
• B32B 27/40 - Layered products essentially comprising synthetic resin comprising polyurethanes
• B32B 37/24 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate

Abstract

A digital printing system (10) includes a flexible intermediate transfer member (ITM) (44) and a dancer assembly (100). The ITM (44) is configured to receive ink droplets from an ink supply system to form an image thereon, and to transfer the image to a target substrate (50). The dancer assembly (100) includes a fluid chamber (103) and a rotatable element (111) fitted in the fluid chamber (103), the fluid chamber (103) includes an inlet (107) configured to receive pressurized fluid (130) into the fluid chamber (103), and the pressurized fluid (130) causes the rotatable element (111) to move relative to the fluid chamber (103) and to apply tension to the ITM (44) while being rotated by the ITM (44).

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 2/01 - Ink jet

Abstract

The present disclosure provides a system for punting. The present disclosure further provides a method for preventing or minimizing printing defects in a printing process.

IPC Classes  ?

• B41J 2/175 - Ink supply systems

Abstract

A friction reduction system for reducing friction of an intermediate transfer member (ITM) of a printing system, while the ITM is guided along the printing system by a guiding arrangement. The friction reduction system includes a fluid reservoir mounted within the printing system, a fluid depositing arrangement disposed along the ITM, and a control mechanism, adapted to control depositing of fluid, from the fluid depositing arrangement onto the guiding arrangement or onto at least a portion of the ITM. Depositing of the fluid reduces friction between the ITM and the guiding arrangement.

IPC Classes  ?

• B41J 2/01 - Ink jet
• B41J 2/21 - Ink jet for multi-colour printing
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form

Abstract

A printing system comprises an intermediate transfer member, an image-forming station comprising a print bar disposed over a surface of the ITM, a conveyer for driving rotation of the ITM, a detection system configured to detect foreign matter transported at a detection location upstream of the image-forming station, and a response system operatively coupled to the detection system to respond to the detection of foreign matter by performing at least one collision-prevention action to prevent a potential collision between foreign matter and the print bar.

IPC Classes  ?

• B41J 29/387 - Automatic cut-off devices
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
• B41J 2/01 - Ink jet

Abstract

A printing system comprises an intermediate transfer member (ITM), an image forming station, a conveyer for driving rotation of the ITM, and a treatment station disposed downstream of the impression station and upstream of the image forming station configured for coating the ITM surface with a layer of a liquid treatment formulation, the treatment station comprising an applicator for applying the liquid treatment formulation to the ITM, a coating thickness-regulation assembly comprising a plurality of blades, a blade-replacement mechanism, and a blade-replacement controller for controlling the blade-replacement mechanism.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41J 2/01 - Ink jet

Abstract

A digital printing system includes a print head and a processor. The print head is configured to jet droplets of ink. The a processor is further configured to translate a required shade of a color, to be printed at a given location on a substrate by the print head, into a sequence of pulses, the sequence including: (a) up to a predefined maximum number of driving pulses that cause the print head to jet respective droplets, and (b) a tickling pulse, which has a smaller amplitude than the driving pulses and which causes the print head to jet a droplet smaller than the droplets jetted in response to the driving pulses. The processor is additionally configured to apply the sequence of pulses to the print head.

IPC Classes  ?

• B41J 29/38 - Drives, motors, controls, or automatic cut-off devices for the entire printing mechanism
• B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
• B41J 2/21 - Ink jet for multi-colour printing

Abstract

A method for correcting an error in image printing, the method includes receiving a reference digital image (RDI). Based on a predefined selection criterion, one or more regions in the RDI that are suitable for use as anchor features for sensing the error, are automatically selected. A digital image (DI) acquired from a printed image of the RDI, is received and the one or more regions are automatically identified in the DI. Based on the anchor features of the DI, the error is automatically estimated in the printed image. A correction that, when applied to the DI, compensates for the estimated error, is calculated. The estimated error is corrected in a subsequent digital image (SDI) to be printed, and the SDI having the corrected error, is printed.

IPC Classes  ?

• G06T 7/00 - Image analysis
• G06F 3/12 - Digital output to print unit

Abstract

An indirect printing system is disclosed having an intermediate transfer member (ITM) in the form of an endless belt that circulates during operation to transport ink images from an image forming station. Ink images are deposited on an outer surface of the ITM by one or a plurality of print bars. At an impression station, the ink images are transferred from the outer surface of the ITM onto a printing substrate. In some embodiments, the outer surface of the ITM 20 is maintained within the image forming station at a predetermined distance from the one or each of the print bars 10, 12, 14 and 16 by means of a plurality of support rollers 11, 13, 15, 17 that have a common flat tangential plane and contact the inner surface of the ITM. In some embodiments, the inner surface of the ITM is attracted to the support rollers, the attraction being such that the area of contact between the ITM and each support roller is greater on the downstream side than the upstream side of the support roller, referenced to the direction of movement of the ITM.

IPC Classes  ?

• B41J 2/01 - Ink jet

Abstract

Embodiments of the invention relate to a method of indirect printing with an aqueous ink. In some embodiments, an intermediate transfer member (ITM) comprising a silicone-based release layer surface is employed. For example, the release layer surface satisfies at least one of the following properties: (i) a receding contact angle of a drop of distilled water deposited on the silicone-based release layer surface is at most 60°; and (ii) a 10-second dynamic contact angle (DCA) of a drop of distilled water deposited on the silicone-based release layer surface is at most 108°. Related apparatus, systems and treatment formulations are disclosed herein.

IPC Classes  ?

• B41M 5/00 - Duplicating or marking methods; Sheet materials for use therein
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41M 5/025 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
• B41M 5/03 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by pressure
• C09D 11/322 - Pigment inks
• C09D 11/38 - Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
• C09D 11/54 - Inks based on two liquids, one liquid being the ink, the other liquid being a reaction solution, a fixer or a treatment solution for the ink
• B41J 2/01 - Ink jet
• B41M 1/06 - Lithographic printing

Abstract

An intermediate transfer member (ITM) for use in a printing system to transport an ink image from an image forming station to an impression station for transfer of the ink image from the ITM onto a printing substrate, wherein the ITM is an endless flexible belt of substantially uniform width which, during use, passes over drive and guide rollers and is guided through at least the image forming station by means of guide channels that receive formations provided on both lateral edges of the belt, wherein the formations on a first edge differ from the formations on the second edge by being configured for providing the elasticity desired to maintain the belt taut when the belt is guided through their respective lateral channels.

IPC Classes  ?

• B41M 5/025 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
• B41J 2/01 - Ink jet

Abstract

A system (10) includes an intermediate transfer member (ITM) (44) and a substrate conveyor (80). The ITM (44) is configured to receive droplets of one or more printing fluids so as to form an image thereon, and to transfer the image to a target substrate (50). The substrate conveyor (80) is configured to grip and move the target substrate (50) to and from the ITM (44) for transferal of the image, the substrate conveyor (80) includes one or more rotatable elements (110, 200), which are configured to provide mechanical support to the target substrate (50), such that, when the target substrate (50) moves over the one or more rotatable elements (110, 200), at least one of the rotatable elements (110, 200) is configured to rotate in response to a physical contact with the target substrate (50).

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 13/00 - Devices or arrangements specially adapted for supporting or handling copy material in short lengths, e.g. sheets
• B41J 13/22 - Clamps or grippers
• B65H 5/06 - Feeding articles separated from piles; Feeding articles to machines by rollers
• B65H 29/04 - Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
• B65H 5/08 - Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
• B41J 2/01 - Ink jet
• B65H 29/52 - Stationary guides or smoothers

Abstract

A jacket-securing arrangement is disclosed for mounting in a cylinder, which cylinder (220) has an outer surface and at least one recess (320) in the outer surface for receiving an inwardly turned edge of a replaceable jacket (225) overlying at least part of the outer surface of the cylinder. The jacket-securing arrangement is mountable within the recess so as not to project beyond the outer surface of the cylinder when the jacket is secured thereto, and includes a clamping lever pivotable about a shaft located within the recess between a clamping position in which the edge of the replaceable jacket is clamped between the lever and a side wall of the recess and a release position in which the lever is spaced from the side wall of the recess. A magnet is provided to retain the lever in the clamping position. The clamping lever is formed of two or more members assembled around the shaft and defining between them a bearing surface engaging an outer surface of the shaft. The shaft may be a gripper shaft including a plurality of grippers for securing a printing substrate sheet to the outer surface of a substrate transport cylinder of a printing system, the jacket-securing arrangement being disposed between grippers.

IPC Classes  ?

• B41F 27/10 - Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders

Abstract

There is disclosed a condensation curable coating composition in the form of an oil-in-oil emulsion, the coating composition being able to protect surfaces coated therewith from undesired contamination by materials coming in contact therewith. The surfaces to be so protected by the coating composition, once cured, can, by way of illustration, be of parts of printing systems and the materials coming in contact with such surfaces can be ink images or residues thereof.

IPC Classes  ?

• C09D 183/04 - Polysiloxanes
• C09D 5/02 - Emulsion paints
• C08G 77/16 - Polysiloxanes containing silicon bound to oxygen-containing groups to hydroxy groups
• C08G 77/00 - Macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon
• C08G 77/08 - Preparatory processes characterised by the catalysts used
• C08K 5/5415 - Silicon-containing compounds containing oxygen containing at least one Si—O bond
• B41N 7/00 - Shells for rollers of printing machines

Abstract

The present disclosure relates to formulations for use with an intermediate transfer members of indirect printing systems and printing methods utilizing same. The present disclosure further relates to intermediate transfer members having a release layer surface covered with the formulations of the invention. The present disclosure also relates to printed substrates, printed articles and printed patterns produced using the formulations of the invention and to kits comprising the formulations.

IPC Classes  ?

• C09D 11/322 - Pigment inks
• B41M 5/00 - Duplicating or marking methods; Sheet materials for use therein
• B41M 5/025 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
• C09D 11/38 - Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes

Abstract

Some embodiments relate to printing system is described that has an intermediate transfer member (ITM) in the form of a seamed endless belt for transporting an ink image from an image forming station, at which an ink image is deposited on ITM, to an impression station, where the ink image is transferred onto a printing substrate. Two drive members are provided for movement in synchronism with one another. Rotation of the drive members during installation of a new ITM serves to thread the strip through the printing system by pulling the strip from its leading end. Alternatively or additionally, indirect printing system comprising the ITM and an image forming station at which droplets of ink are applied to the ITM to form ink images thereon is disclosed. One or more blowing mechanisms (e.g. associated with the image forming station) are disclosed herein.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41J 13/08 - Bands or like feeding devices
• B41J 15/04 - Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
• B41J 2/01 - Ink jet
• B41J 15/16 - Means for tensioning or winding the web
• B65G 17/32 - Individual load-carriers
• G03G 15/16 - Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern

Abstract

Disclosed are curable polymer compositions, elastomers thereof and release layers useful in the art of printing made of the disclosed elastomers. Disclosed are also intermediate transfer members having a release layer useful in the art of printing. Disclosed are anisotropic intermediate transfer members. Disclosed are curable adhesive compositions, that in some embodiments are useful in preparing intermediate transfer members useful in printing. Also disclosed are intermediate transfer members useful in the art of printing having a release layer with an image transfer surface having protonatable functional groups apparent thereupon. Also disclosed are methods of making such intermediate transfer members.

IPC Classes  ?

• G03G 15/16 - Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern

Abstract

A digital printing system (10) includes an intermediate transfer member (ITM) (44) which is configured to receive a printing fluid so as to form an image, a continuous target substrate (50), and a processor (20). The continuous target substrate (50) is configured to engage with the ITM (44) at an engagement point (150) for receiving the image from the ITM (44), at the engagement point (150), the ITM (44) is configured to move at a first velocity and the continuous target substrate (50) is configured to move at a second velocity. The processor (20) is configured to match the first velocity and the second velocity at the engagement point (150).

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41J 2/01 - Ink jet

Abstract

A printing system for printing on a substrate, comprises a movable intermediate transfer member in the form of a flexible, substantially inextensible, belt guided to follow a closed path, an image forming station for depositing droplets of a liquid ink onto an outer surface of the belt to form an ink image, a drying station for drying the ink image on the belt to leave an ink residue film on the outer surface of the belt, first and second impression stations spaced from one another in the direction of movement of the belt, each impression station comprising an impression cylinder for supporting and transporting the substrate and a pressure cylinder carrying a compressible blanket for urging the belt against the substrate supported on the impression cylinder, and a transport system for transporting the substrate from the first impression station to the second impression station. The pressure cylinder of at least the first impression station is movable between a first position in which the belt is urged towards the impression cylinder to cause the residue film on the outer surface of the belt to be transferred onto the front side of the substrate supported on the impression cylinder, and a second position in which the belt is spaced from the impression cylinder to allow the ink image on the belt to pass through the first impression station and arrive intact at the second impression station for transfer onto the reverse side of the substrate supported on the second impression cylinder.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 3/60 - Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing on both faces of the printing material
• B41J 2/01 - Ink jet

Abstract

A digital printing system (10) includes a print head (622) and a processor (20). The print head is configured to jet droplets of ink. The processor is further configured to translate a required shade of a color, to be printed at a given location on a substrate by tire print head, into a sequence of pulses (625, 630), the sequence including: (a) up to a predefined maximum number of driving pulses (625) that cause the print head to jet respective droplets, and (b) a tickling pulse (630), which has a smaller amplitude than the driving pulses and which causes the print head to jet a droplet smaller than the droplets jetted in response to the driving pulses. The processor is additionally configured to apply the sequence of pulses to the print head.

IPC Classes  ?

• B41J 29/38 - Drives, motors, controls, or automatic cut-off devices for the entire printing mechanism
• B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
• B41J 2/21 - Ink jet for multi-colour printing

Abstract

A friction reduction system for reducing friction of an intermediate transfer member (ITM) of a printing system, while the ITM is guided along the printing system by a guiding arrangement. The friction reduction system includes a fluid reservoir mounted within the printing system, a fluid depositing arrangement disposed along the ITM, and a control mechanism, adapted to control depositing of fluid, from the fluid depositing arrangement onto the guiding arrangement or onto at least a portion of the ITM. Depositing of the fluid reduces friction between the ITM and the guiding arrangement.

IPC Classes  ?

• G03G 21/00 - Arrangements not provided for by groups , e.g. cleaning, elimination of residual charge
• G03G 15/00 - Apparatus for electrographic processes using a charge pattern
• B41J 2/01 - Ink jet
• B41J 2/21 - Ink jet for multi-colour printing
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form

Abstract

An impression station of a printing system comprises a rotatable impression cylinder with an impression cylinder gap housing a plurality of grippers recessed therein. A pressure cylinder assembly comprises a pressure cylinder comprising a pressure cylinder gap and an angle portion joining a trailing edge of the pressure cylinder gap and an outer circumferential surface of the pressure cylinder. A compressible blanket is disposed around the circumference of the pressure cylinder. A margin insert is interposed between the pressure cylinder and the compressible blanket at least at the angle portion, such that a local external geometry of the pressure cylinder assembly at the angle portion is changed by the presence of the margin insert. The change in the local external geometry of the pressure cylinder assembly due to the presence of the margin insert is effective to reduce a dimension of an unprinted leading-edge margin.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 13/22 - Clamps or grippers
• B41F 21/05 - In-feed grippers
• B41J 2/01 - Ink jet

Abstract

A method for correcting distortion in image printing, the method includes receiving a digital image (200, 306, 376, 500, 600, 700, 810) acquired from a printed image. Based on the digital image (200, 306, 376, 500, 600, 700, 810), a geometric distortion in the printed image is estimated. One or more pixel locations (228, 504, 506, 514, 610, 620, 630, 640, 712, 716, 722, 724) are calculated, such that, when one or more dummy pixels (232, 234) are implanted therein, compensate for the estimated geometric distortion. The geometric distortion is corrected in a subsequent digital image to be printed, by implanting the one or more dummy pixels (232, 234) at the one or more calculated pixel locations (228, 504, 506, 514, 610, 620, 630, 640, 712, 716, 722, 724) in the subsequent digital image. The subsequent digital image having the corrected geometric distortion is printed.

IPC Classes  ?

• B41J 2/21 - Ink jet for multi-colour printing
• H04N 1/409 - Edge or detail enhancement; Noise or error suppression
• H04N 1/58 - Edge or detail enhancement; Noise or error suppression, e.g. colour misregistration correction

Abstract

A printing process is disclosed which comprises directing droplets of an ink onto an intermediate transfer member to form an ink image, the ink including an organic polymeric resin and a coloring agent in an aqueous carrier, and the transfer member having a hydrophobic outer surface so that each ink droplet in the ink image spreads on impinging upon the intermediate transfer member to form an ink film. The ink is dried while the ink image is being transported by the intermediate transfer member by evaporating the aqueous carrier from the ink image to leave a residue film of resin and coloring agent. The residue film is then transferred to a substrate. The chemical compositions of the ink and of the surface of the intermediate transfer member are selected such that attractive intermolecular forces between molecules in the outer skin of each droplet and on the surface of the intermediate transfer member counteract the tendency of the ink film produced by each droplet to bead under the action of the surface tension of the aqueous carrier, without causing each droplet to spread by wetting the surface of the intermediate transfer member.

IPC Classes  ?

• B41J 2/00 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41M 5/025 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
• B41M 5/03 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by pressure
• B41N 10/00 - Blankets or like coverings; Coverings for wipers for intaglio printing

Abstract

Methods for printing using printing systems comprising a flexible intermediate transfer member (ITM) disposed around a plurality of guide rollers at which encoders are installed, and an image-forming station at which ink images are formed by droplet deposition by print bars onto the ITM, can include measuring a local velocity of the ITM under one of the print bars, determining a stretch factor for a portion of the ITM based on a relationship between an estimated stretched length fixed physical distance between print bars, controlling an ink deposition parameter according to the stretch factor so as to compensate for stretching of the reference portion of the ITM.

IPC Classes  ?

• B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
• B41J 2/01 - Ink jet
• B41J 2/155 - Arrangement thereof for line printing
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 2/03 - Ink jet characterised by the jet generation process generating a continuous ink jet by pressure

Abstract

Embodiments of the present invention relate to control apparatus and methods of a printing system, for example, comprising an intermediate transfer member (ITM) and to user-related features of a printing system. Some embodiments relate to regulation of a velocity and/or tension and/or length of the ITM. Some embodiments relate to regulation of deposition of ink on the moving ITM. Some embodiments regulate to apparatus configured to alert a user of one or more events related to operation of the ITM. Some embodiments relate to a time-line GUI for visualizing and/or manipulating queued print jobs which may be employed. Some embodiments relate to a reversed augmented reality GUI for visualization and/or control of the printing system. In some embodiments, a display screen is mounted to a printer housing and/or able to control access to moving parts of a printing system.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material

Abstract

An intermediate transfer member (ITM) (210, 310, 320, 330, 400, 410, 420, 430, 500, 520, 540, 600, 700, 802) configured for receiving ink droplets to form an ink image thereon and for transferring the ink image to a target substrate (226), the TTM (210, 310, 320, 330, 400, 410, 420, 430, 500, 520, 540, 600, 700, 802) includes one or more layers (273, 277, 373, 379, 602, 604, 606, 608, 610, 704, 706, 708, 712) and one or more markers (33, 333, 335, 392, 408, 418, 428, 448, 458, 612, 710, 804, 806) integrated with at least one of the one or more layers (273, 277, 373, 379, 602, 604, 606, 608, 610, 704, 706, 708, 712) at one or more respective marking locations along the ITM (210, 310, 320, 330, 400, 410, 420, 430, 500, 520, 540, 600, 700).

IPC Classes  ?

• B41J 3/46 - Printing mechanisms combined with apparatus providing a visual indication
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 2/175 - Ink supply systems
• B41J 29/393 - Devices for controlling or analysing the entire machine
• B41J 2/01 - Ink jet

Abstract

Embodiments of the invention relate to a method of indirect printing with an aqueous ink. Related apparatus, systems and treatment formulations are disclosed herein. Some embodiments relate to an aqueous treatment formulation for use with an intermediate transfer member of a printing system. In some embodiments, the system comprises a treatment station disposed downstream of the impression station and upstream of the image forming station for forming a uniform thin layer of a liquid treatment formulation onto a surface of an intermediate transfer member (ITM) at a lower run thereof.

IPC Classes  ?

• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 2/01 - Ink jet

Abstract

a method for correcting an error in image printing, the method includes receiving a reference digital image (RDI). Based on a predefined selection criterion, one or more regions in the RDI that are suitable for use as anchor features for sensing the error, are selected. A digital image (DI) acquired from a printed image of the RDI, is received and the one or more regions are identified in the DI. Based on the anchor features of the DI, the error is estimated in the printed image. A correction that, when applied to the DI, compensates for the estimated error, is calculated. The estimated error is corrected in a subsequent digital image (SDI) to be printed, and the SDI having the corrected error, is printed.

IPC Classes  ?

• G06T 7/00 - Image analysis
• G06F 3/12 - Digital output to print unit

Abstract

An intermediate transfer member (ITM) for use with a printing system, the ITM having (a) a support layer; and (b) a release layer having an ink reception surface and a second surface opposing the ink reception surface, the second surface attached to the support layer, the release layer formed of an addition-cured, hydrophobic silicone material, wherein the release surface of the release layer has relatively hydrophilic properties with respect to the addition-cured, hydrophobic silicone material.

IPC Classes  ?

• B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
• B32B 7/06 - Interconnection of layers permitting easy separation
• B32B 15/14 - Layered products essentially comprising metal next to a fibrous or filamentary layer
• B32B 15/20 - Layered products essentially comprising metal comprising aluminium or copper
• B32B 25/08 - Layered products essentially comprising natural or synthetic rubber comprising rubber as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin
• B32B 25/20 - Layered products essentially comprising natural or synthetic rubber comprising silicone rubber
• B32B 27/18 - Layered products essentially comprising synthetic resin characterised by the use of special additives
• B41J 2/22 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression- transfer material
• B32B 7/12 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties
• B32B 27/36 - Layered products essentially comprising synthetic resin comprising polyesters
• G03G 7/00 - Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
• B32B 27/40 - Layered products essentially comprising synthetic resin comprising polyurethanes
• B32B 27/28 - Layered products essentially comprising synthetic resin comprising copolymers of synthetic resins not wholly covered by any one of the following subgroups
• B32B 37/24 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
• B32B 37/26 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer which influences the bonding during the laminating process, e.g. release layers or pressure equalising layers

Abstract

Methods for printing using printing systems comprising a flexible intermediate transfer member (ITM) disposed around a plurality of guide rollers at which encoders are installed, and an image-forming station at which ink images are formed by droplet deposition by print bars onto the ITM, can include measuring a local velocity of the ITM under one of the print bars, determining a stretch factor for a portion of the ITM based on a relationship between an estimated stretched length fixed physical distance between print bars, controlling an ink deposition parameter according to the stretch factor so as to compensate for stretching of the reference portion of the ITM.

IPC Classes  ?

• B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material

Abstract

An ink film construction consisting: (a) a printing substrate; and (b) at least one ink film, fixedly adhered to a top surface of the printing substrate, the ink film having an upper film surface distal to the top surface of the substrate, wherein a surface concentration of nitrogen at the upper film surface exceeds a bulk concentration of nitrogen within the film, the bulk concentration measured at a depth of at least 30 nanometers below the upper film surface, and wherein a ratio of the surface concentration to the bulk concentration is at least 1.1 to 1.

IPC Classes  ?

• C09D 11/30 - Inkjet printing inks
• B32B 3/10 - Layered products essentially comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products essentially having particular features of form characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material
• B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
• C09D 11/322 - Pigment inks
• B41J 2/01 - Ink jet
• C09D 125/08 - Copolymers of styrene
• C09D 125/14 - Copolymers of styrene with unsaturated esters
• B41F 16/00 - Transfer printing apparatus
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• C09D 11/107 - Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
• G03G 15/14 - Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
• D06Q 1/00 - Decorating textiles
• D06P 1/00 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed
• B05D 1/00 - Processes for applying liquids or other fluent materials
• D06P 3/00 - Special processes of dyeing or printing textiles or dyeing leather, furs or solid macromolecular substances in any form, classified according to the material treated

Abstract

A printing system comprises an intermediate transfer member (ITM), an image forming station, a conveyer for driving rotation of the ITM, and a treatment station disposed downstream of the impression station and upstream of the image forming station configured for coating the ITM surface with a layer of a liquid treatment formulation, the treatment station comprising an applicator for applying the liquid treatment formulation to the ITM, a coating thickness-regulation assembly comprising a plurality of blades, a blade-replacement mechanism, and a blade-replacement controller for controlling the blade-replacement mechanism.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41J 2/01 - Ink jet

Abstract

A method of indirect digital printing is disclosed herein. The method employs (i) first (e.g. transparent) and second aqueous ink components (comprising colorant particles) and (ii) a target surface (e.g. hydrophobic) of an intermediate transfer member (ITM). A quantity of first ink component is deposited (e.g. by ink-jetting) onto the target surface and partially dried to produce a partially-dried layer thereon. Droplets of the second ink component are deposited onto the partially-dried layer of first ink component to form a wet, colored ink-image. Upon deposition of the droplets of the second ink component, the colorant particles from the second component penetrate into the partially-dried layer of the first ink component. The wet, colored image is dried into a tacky ink-image-bearing residue film which is transferred to the substrate. Physical and/or chemical properties of the first and second ink components as provided by various embodiments are disclosed herein.

IPC Classes  ?

• B41M 5/025 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
• B41M 5/00 - Duplicating or marking methods; Sheet materials for use therein
• B41M 7/00 - After-treatment of printed works, e.g. heating, irradiating
• C09D 11/107 - Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
• C09D 11/322 - Pigment inks
• C09D 11/40 - Ink-sets specially adapted for multi-colour inkjet printing
• B41J 2/01 - Ink jet
• B41J 2/21 - Ink jet for multi-colour printing
• B41M 5/03 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by pressure

Abstract

7 cP, for at least a second temperature within a second range of 50° C. to 55° C.

IPC Classes  ?

• C09D 11/107 - Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
• C09D 11/106 - Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• C09D 11/30 - Inkjet printing inks
• C09D 11/38 - Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
• C09D 11/104 - Polyesters

Abstract

A flexible belt is disclosed for use in a printing system. The belt comprises an endless strip which, in use, travels along a continuous path. Formations are provided along the sides of the strip which are capable of engaging with lateral tracks to place the belt under lateral tension, the lateral tracks further serving to constrain the belt to follow the continuous path.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material

Abstract

Embodiments of the invention relate to a method of indirect printing with an aqueous ink formulation applied to the surface of the intermediate transfer member. Related apparatus, systems and treatment formulations are disclosed herein.

IPC Classes  ?

• B41M 5/025 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 2/14 - Structure thereof
• B41M 5/00 - Duplicating or marking methods; Sheet materials for use therein
• B41M 5/03 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by pressure
• C09D 129/04 - Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
• C09D 7/65 - Additives macromolecular
• B41J 2/21 - Ink jet for multi-colour printing
• C09D 7/40 - Additives
• B41J 2/01 - Ink jet
• C09D 11/322 - Pigment inks
• B41J 29/17 - Cleaning arrangements
• B41N 10/00 - Blankets or like coverings; Coverings for wipers for intaglio printing

Abstract

A printing system comprises an intermediate transfer member, an image-forming station comprising a print bar disposed over a surface of the ITM, a conveyer for driving rotation of the ITM, a detection system configured to detect foreign matter 5 transported at a detection location upstream of the image-forming station, and a response system operatively coupled to the detection system to respond to the detection of foreign matter by performing at least one collision-prevention action to prevent a potential collision between foreign matter and the print bar.

IPC Classes  ?

• B41J 29/387 - Automatic cut-off devices
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
• B41J 2/01 - Ink jet

Abstract

Some embodiments relate to printing system is described that has an intermediate transfer member (ITM) in the form of a seamed endless belt for transporting an ink image from an image forming station, at which an ink image is deposited on ITM, to an impression station, where the ink image is transferred onto a printing substrate. Two drive members are provided for movement in synchronism with one another. Rotation of the drive members during installation of a new ITM serves to thread the strip through the printing system by pulling the strip from its leading end. Alternatively or additionally, indirect printing system comprising the ITM and an image forming station at which droplets of ink are applied to the ITM to form ink images thereon is disclosed. One or more blowing mechanisms (e.g. associated with the image forming station) are disclosed herein.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41J 13/08 - Bands or like feeding devices
• B41J 15/04 - Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
• B41J 15/16 - Means for tensioning or winding the web
• B65G 17/32 - Individual load-carriers
• G03G 15/16 - Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern
• B41J 2/01 - Ink jet

Abstract

An intermediate transfer member (ITM) for use in a printing system to transport an ink image from an image forming station to an impression station for transfer of the ink image from the ITM onto a printing substrate, wherein the ITM is an endless flexible belt of substantially uniform width which, during use, passes over drive and guide rollers and is guided through at least the image forming station by means of guide channels that receive formations provided on both lateral edges of the belt, wherein the formations on a first edge differ from the formations on the second edge by being configured for providing the elasticity desired to maintain the belt taut when the belt is guided through their respective lateral channels.

IPC Classes  ?

• B41M 5/025 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
• B41J 2/01 - Ink jet

Abstract

Printing apparatus (20) includes a continuous blanket (24) and a set of motorized rollers (31), which advance the blanket at a constant speed through an image area. One or more print bars (38) eject droplets of ink at respective locations onto the blanket in the image area. One or more monitoring rollers (42), in proximity to the locations of the print bars, contact the blanket so as to be rotated by advancement of the blanket. Each monitoring roller includes an encoder (44), which outputs a signal indicative of a rotation angle of the monitoring roller. A control unit (40) collects, during a calibration phase, the signal from the encoders over multiple rotations of the monitoring rollers and computes runout correction factors. During an operational phase, the control unit synchronizes ejection of the droplets from the print bars using the computed runout correction factors.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 3/46 - Printing mechanisms combined with apparatus providing a visual indication
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41J 11/13 - Backings or blankets

Abstract

Embodiments of the invention relate to a method of indirect printing with an aqueous ink. In some embodiments, an intermediate transfer member (ITM) comprising a silicone-based release layer surface is employed. For example, the release layer surface satisfies at least one of the following properties: (i) a receding contact angle of a drop of distilled water deposited on the silicone-based release layer surface is at most 60°; and (ii) a 10-second dynamic contact angle (DCA) of a drop of distilled water deposited on the silicone-based release layer surface is at most 108°. Related apparatus, systems and treatment formulations are disclosed herein.

IPC Classes  ?

• B41M 5/00 - Duplicating or marking methods; Sheet materials for use therein
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41M 5/025 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
• B41M 5/03 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by pressure
• C09D 11/322 - Pigment inks
• C09D 11/38 - Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
• C09D 11/54 - Inks based on two liquids, one liquid being the ink, the other liquid being a reaction solution, a fixer or a treatment solution for the ink
• B41J 2/01 - Ink jet
• B41M 1/06 - Lithographic printing

Abstract

Disclosed are curable polymer compositions, elastomers thereof and release layers useful in the art of printing made of the disclosed elastomers. Disclosed are also intermediate transfer members having a release layer useful in the art of printing. Disclosed are anisotropic intermediate transfer members. Disclosed are curable adhesive compositions, that in some embodiments are useful in preparing intermediate transfer members useful in printing. Also disclosed are intermediate transfer members useful in the art of printing having a release layer with an image transfer surface having protonatable functional groups apparent thereupon. Also disclosed are methods of making such intermediate transfer members.

IPC Classes  ?

• G03G 15/00 - Apparatus for electrographic processes using a charge pattern
• G03G 15/14 - Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
• G03G 15/16 - Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern

Abstract

A system comprising a processor configured to: provide a master Three-Dimensional (3D) scene; insert at least one source video feed into at least one position within the master 3D scene, allowing a configuration in which at least a first part of the master 3D scene is in front of the source video feed and at least a second part of the master 3D scene is behind the source video feed; and generate a combined video of the master 3D scene with the at least one source video feed inserted therein.

IPC Classes  ?

• H04N 13/275 - Image signal generators from 3D object models, e.g. computer-generated stereoscopic image signals
• H04N 13/156 - Mixing image signals
• G09B 5/06 - Electrically-operated educational appliances with both visual and audible presentation of the material to be studied
• G09B 9/00 - Simulators for teaching or training purposes
• G11B 27/036 - Insert-editing
• H04N 7/18 - Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
• H04N 21/85 - Assembly of content; Generation of multimedia applications

Abstract

An intermediate transfer member (ITM) for use in a printing system. The ITM includes an endless flexible belt formed of an elongate belt having a longitudinal axis. Attached to lateral edges of the endless flexible belt along the longitudinal axis are a first elongate strip and a second elongate strip, each of the elongate strips including lateral formations on outward facing lateral ends thereof which are distal to the lateral edges of the belt. At least one of the first and second elongate strips includes a first longitudinal portion having a first elasticity, and a second longitudinal portion having a second elasticity, such that the second elasticity is greater than the first elasticity. The first portion is attached to the lateral edges of the flexible belt and the second portion extends between the first portion and the lateral formations.

IPC Classes  ?

• B41J 2/01 - Ink jet
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41J 29/38 - Drives, motors, controls, or automatic cut-off devices for the entire printing mechanism

Abstract

An indirect printing system is disclosed having an intermediate transfer member (ITM) in the form of an endless belt that circulates during operation to transport ink images from an image forming station. Ink images are deposited on an outer surface of the ITM by one or a plurality of print bars. At an impression station, the ink images are transferred from the outer surface of the ITM onto a printing substrate. In some embodiments, the outer surface of the ITM 20 is maintained within the image forming station at a predetermined distance from the one or each of the print bars 10, 12, 14 and 16 by means of a plurality of support rollers 11, 13, 15, 17 that have a common flat tangential plane and contact the inner surface of the ITM. In some embodiments, the inner surface of the ITM is attracted to the support rollers, the attraction being such that the area of contact between the ITM and each support roller is greater on the downstream side than the upstream side of the support roller, referenced to the direction of movement of the ITM.

IPC Classes  ?

• B41J 2/01 - Ink jet

Abstract

Embodiments of the present invention relate to control apparatus and methods of a printing system, for example, comprising an intermediate transfer member (ITM) and to user-related features of a printing system. Some embodiments relate to regulation of a velocity and/or tension and/or length of the ITM. Some embodiments relate to regulation of deposition of ink on the moving ITM. Some embodiments regulate to apparatus configured to alert a user of one or more events related to operation of the ITM. Some embodiments relate to a time-line GUI for visualizing and/or manipulating queued print jobs which may be employed. Some embodiments relate to a reversed augmented reality GUI for visualization and/or control of the printing system. In some embodiments, a display screen is mounted to a printer housing and/or able to control access to moving parts of a printing system.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material

Abstract

There are disclosed aqueous pigment dispersions containing dispersant-improving-agents, and methods of preparing and using the same.

IPC Classes  ?

• C09D 17/00 - Pigment pastes, e.g. for mixing in paints
• C08K 5/098 - Metal salts of carboxylic acids
• C08K 5/42 - Sulfonic acids; Derivatives thereof
• C08L 33/08 - Homopolymers or copolymers of acrylic acid esters
• C08L 33/14 - Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen
• C08L 53/00 - Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
• C08L 71/02 - Polyalkylene oxides
• C09B 67/04 - Grinding or milling
• C09B 67/46 - Dispersions

Abstract

A flexible belt is disclosed for use in a printing system. The belt comprises an endless strip which, in use, travels along a continuous path. Formations are provided along the sides of the strip which are capable of engaging with lateral tracks to place the belt under lateral tension, the lateral tracks further serving to constrain the belt to follow the continuous path.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material

Abstract

A heat-curable tape, a kit, and a method for connecting ends of an elongate belt to form an intermediate transfer members suitable for use with indirect printing systems. The kit includes an elongate belt and the heat-curable tape. The kit can include a crimping pin. The method includes using the heat curable tape to join ends of the elongate belt at a seam. A heater is used, in a printing system, for heat-curing the heat-curable tape onto the free ends of the elongate belt so as to form the intermediate transfer member.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B29C 65/72 - Joining of preformed parts; Apparatus therefor by combined operations, e.g. welding and stitching
• B29C 65/78 - Means for handling the parts to be joined, e.g. for making containers or hollow articles
• B29C 65/56 - Joining of preformed parts; Apparatus therefor using mechanical means
• B29C 65/50 - Joining of preformed parts; Apparatus therefor using adhesives using adhesive tape
• B29C 65/82 - Testing the joint
• B29C 65/48 - Joining of preformed parts; Apparatus therefor using adhesives
• B29C 65/00 - Joining of preformed parts; Apparatus therefor
• B29L 31/00 - Other particular articles

Abstract

A printing system for printing on a substrate, comprises a movable intermediate transfer member in the form of a flexible, substantially inextensible, belt guided to follow a closed path, an image forming station for depositing droplets of a liquid ink onto an outer surface of the belt to form an ink image, a drying station for drying the ink image on the belt to leave an ink residue film on the outer surface of the belt, first and second impression stations spaced from one another in the direction of movement of the belt, each impression station comprising an impression cylinder for supporting and transporting the substrate and a pressure cylinder carrying a compressible blanket for urging the belt against the substrate supported on the impression cylinder, and a transport system for transporting the substrate from the first impression station to the second impression station. The pressure cylinder of at least the first impression station is movable between a first position in which the belt is urged towards the impression cylinder to cause the residue film on the outer surface of the belt to be transferred onto the front side of the substrate supported on the impression cylinder, and a second position in which the belt is spaced from the impression cylinder to allow the ink image on the belt to pass through the first impression station and arrive intact at the second impression station for transfer onto the reverse side of the substrate supported on the second impression cylinder.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 3/60 - Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing on both faces of the printing material
• B41J 2/01 - Ink jet

Abstract

A printing system is described that has an intermediate transfer member in the form of a seamed endless belt for transporting an ink image from an image forming station, at which an ink image is deposited on the intermediate transfer member, to an impression station, where the ink image is transferred onto a printing substrate. The belt has along its edges formations of a greater thickness than the belt. The formations are received in channels to guide the belt and maintain the belt under lateral tension. Two drive members are provided, each located within a respective one of the channels. The two drive members are connected for movement in synchronism with one another and each has a respective laterally projecting gripper shaped for form locking engagement with the formations on a leading end of a strip from which the intermediate transfer member is to be formed. Rotation of the drive members during installation of a new intermediate transfer member serves to thread the strip through the printing system by pulling the strip from its leading end.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• G03G 15/16 - Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern
• B65G 17/32 - Individual load-carriers
• B41J 15/04 - Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
• B41J 13/08 - Bands or like feeding devices
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41J 15/16 - Means for tensioning or winding the web
• B41J 2/01 - Ink jet

Abstract

An intermediate transfer member (ITM) for use with a printing system, the ITM having (a) a support layer; and (b) a release layer having an ink reception surface and a second surface opposing the ink reception surface, the second surface attached to the support layer, the release layer formed of an addition-cured, hydrophobic silicone material, wherein the release surface of the release layer has relatively hydrophilic properties with respect to the addition-cured, hydrophobic silicone material.

IPC Classes  ?

• B41J 2/22 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression- transfer material
• B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
• B32B 7/06 - Interconnection of layers permitting easy separation
• B32B 7/12 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties
• B32B 15/14 - Layered products essentially comprising metal next to a fibrous or filamentary layer
• B32B 15/20 - Layered products essentially comprising metal comprising aluminium or copper
• B32B 25/08 - Layered products essentially comprising natural or synthetic rubber comprising rubber as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin
• B32B 25/20 - Layered products essentially comprising natural or synthetic rubber comprising silicone rubber
• B32B 27/18 - Layered products essentially comprising synthetic resin characterised by the use of special additives
• B32B 27/36 - Layered products essentially comprising synthetic resin comprising polyesters
• B32B 37/26 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer which influences the bonding during the laminating process, e.g. release layers or pressure equalising layers

Abstract

An aqueous treatment composition for ITM (Intermediate transfer member) of a printing system and a method of printing comprising the step of applying said treatment composition to the surface of an ITM, wherein said treatment composition comprising: at least 3% wt quaternary ammonium salt, at least 1% wt water soluble polymer, and at least 65% wt water. Also disclosed, a printing system comprising a an ITM and treatment station for forming a thin layer of liquid treatment formulation on the ITM surface.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41M 5/025 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
• B41M 5/03 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by pressure
• C09D 11/38 - Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
• C09D 11/54 - Inks based on two liquids, one liquid being the ink, the other liquid being a reaction solution, a fixer or a treatment solution for the ink
• C09D 11/322 - Pigment inks
• B41M 5/00 - Duplicating or marking methods; Sheet materials for use therein

Abstract

An aqueous treatment composition for ITM (Intermediate transfer member) of a printing system and a method of printing comprising the step of applying said treatment composition to the surface of an ITM, wherein said treatment composition comprising: at least 3% wt quaternary ammonium salt, at least 1% wt water soluble polymer, and at least 65% wt water. Also disclosed, a printing system comprising a an ITM and treatment station for forming a thin layer of liquid treatment formulation on the ITM surface.

IPC Classes  ?

• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 2/01 - Ink jet

Abstract

Printing an image, using a printing system having a malfunctioning or inoperative nozzle corresponding to a column of affected positions in a half-toned digital image, includes modifying the half-toned digital image, using a pre-print digital processor of the printing system to compute a modified version of the half-toned digital image, such that droplet sizes are increased only in the two neighboring columns and according to a value of a compensation function, and printing the modified half-toned digital image on the target surface. Values of the threshold-based compensation function are based on a luminance-debt function defined by an iterative row-by-consecutive-row computation procedure, where for each iteration step the luminance-debt function is re-calculated according to data representing the ink values of affected positions and data representing the instant value of the compensation function.

IPC Classes  ?

• B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers

Abstract

A printing process is disclosed which comprises directing droplets of an ink onto an intermediate transfer member to form an ink image, the ink including an organic polymeric resin and a coloring agent in an aqueous carrier, and the transfer member having a hydrophobic outer surface so that each ink droplet in the ink image spreads on impinging upon the intermediate transfer member to form an ink film. The ink is dried while the ink image is being transported by the intermediate transfer member by evaporating the aqueous carrier from the ink image to leave a residue film of resin and coloring agent. The residue film is then transferred to a substrate. The chemical compositions of the ink and of the surface of the intermediate transfer member are selected such that attractive intermolecular forces between molecules in the outer skin of each droplet and on the surface of the intermediate transfer member counteract the tendency of the ink film produced by each droplet to bead under the action of the surface tension of the aqueous carrier, without causing each droplet to spread by wetting the surface of the intermediate transfer member.

IPC Classes  ?

• B41J 2/00 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
• B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41M 5/025 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
• B41M 5/03 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by pressure
• B41N 10/00 - Blankets or like coverings; Coverings for wipers for intaglio printing

Abstract

An intermediate transfer member (ITM) for use in a printing system to transport an ink image from an image forming station to an impression station for transfer of the ink image from the ITM onto a printing substrate, wherein the ITM is an endless flexible belt of substantially uniform width which, during use, passes over drive and guide rollers and is guided through at least the image forming station by means of guide channels that receive formations provided on both lateral edges of the belt, wherein the formations on a first edge differ from the formations on the second edge by being configured for providing the elasticity desired to maintain the belt taut when the belt is guided through their respective lateral channels.

IPC Classes  ?

• B41M 5/025 - Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
• B41J 2/01 - Ink jet

Abstract

Some embodiments relate to a method of measuring a magnitude of a yaw angle of print head(s) or of a supporting print-bar thereof relative to cross-print direction. In some embodiments, a 1D-representation (1D-rep) of an ink-calibration image is transformed into the frequency domain (e.g. by FFT) characterized by peak profile. The yaw angle magnitude may be computed from relative energies of a primary and secondary peak of the peak profile of the frequency domain.

IPC Classes  ?

• B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers

Abstract

Apparatus and methods for printing multi-level and multi-color digital image are disclosed herein. In some embodiments, first and second level AM half-tone screens are respectively applied to first and second multi-level color-components of the multi-level and multi-color input digital image to respectively generate first and second target binary images. The first and second target binary images are printed respectively using first and second inks (e.g. of different colors) onto a common surface. Specific properties of the AM half-tone screens as well as techniques for producing the AM half-tone screens are disclosed herein. In some embodiments, the techniques overcome objectionable textures derived from rounding errors in divisional of conventional AM supercells.

IPC Classes  ?

• G06K 15/02 - Arrangements for producing a permanent visual presentation of the output data using printers
• G06K 15/10 - Arrangements for producing a permanent visual presentation of the output data using printers by matrix printers
• B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
• B41J 2/21 - Ink jet for multi-colour printing
• H04N 1/52 - Circuits or arrangements for halftone screening
• H04N 1/50 - Picture reproducers
• H04N 1/405 - Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
• H04N 1/58 - Edge or detail enhancement; Noise or error suppression, e.g. colour misregistration correction

Abstract

An ink film construction including: (a) a printing substrate; and (b) at least one ink film, fixedly adhered to a top surface of the printing substrate, the ink film having an upper film surface distal to the top surface of the substrate, wherein a surface concentration of nitrogen at the upper film surface exceeds a bulk concentration of nitrogen within the film, the bulk concentration measured at a depth of at least 30 nanometers below the upper film surface, and wherein a ratio of the surface concentration to the bulk concentration is at least 1.1 to 1.

IPC Classes  ?

• C09D 11/30 - Inkjet printing inks
• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B32B 3/10 - Layered products essentially comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products essentially having particular features of form characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material
• B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
• C09D 11/322 - Pigment inks
• C09D 125/08 - Copolymers of styrene
• C09D 125/14 - Copolymers of styrene with unsaturated esters
• B41F 16/00 - Transfer printing apparatus
• C09D 11/107 - Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
• G03G 15/14 - Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
• D06Q 1/00 - Decorating textiles
• D06P 1/00 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed
• B05D 1/00 - Processes for applying liquids or other fluent materials
• D06P 3/00 - Special processes of dyeing or printing textiles or dyeing leather, furs or solid macromolecular substances in any form, classified according to the material treated

Abstract

A system printing comprises: a movable intermediate transfer member in the form of a flexible, substantially inextensible, belt guided to follow a closed path, an image forming station for forming an ink image, a drying station for drying the ink image to leave an ink residue film, first and second impression stations spaced from one another in the direction of movement of the belt, each impression station comprising an impression cylinder for supporting and transporting a substrate and a pressure cylinder for urging the belt against the substrate supported on the impression cylinder, and a transport system including a perfecting system for selectively inverting the substrate during transportation between the two impression stations; and a treatment station situated between the second impression station and the image forming station, the treatment station configured to apply a treatment agent comprising polyethylenimine (PEI) to pre-treat the belt.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 3/60 - Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing on both faces of the printing material
• B41J 2/01 - Ink jet

Abstract

A flexible belt is disclosed for use in a printing system. The belt comprises an endless strip which, in use, travels along a continuous path. Formations are provided along the sides of the strip which are capable of engaging with lateral tracks to place the belt under lateral tension, the lateral tracks further serving to constrain the belt to follow the continuous path.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material

Abstract

A printing system for printing on a substrate. In embodiments, the system comprises: a movable intermediate transfer member in the form of a flexible, substantially inextensible, thin belt whose compressible layer has a thickness of at most 400 micrometers, the belt being guided to follow a closed path, an image forming station for depositing ink droplets onto an outer surface of the belt to form an ink image, a drying station for drying the ink image to leave an ink residue film, first and second impression stations spaced from one another in the direction of movement of the belt, each impression station comprising an impression cylinder for supporting and transporting the substrate and a pressure cylinder carrying a thick compressible blanket for urging the belt against the substrate supported on the impression cylinder, a thickness of the compressible blanket being at least 1 mm.

IPC Classes  ?

• B41J 2/005 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
• B41J 3/60 - Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing on both faces of the printing material
• B41J 2/01 - Ink jet