A system (14) for recovering a cleaning solution for use in a printing machine (10) comprises a drain tank (36) with a calming section (38) and a recovery section (42) being fluidically connected to the calming section (38) and being arranged above the calming section (38). The system (14) further comprises an inlet pipe (32) for feeding a used cleaning solution into the calming section (38) of the drain tank (36), wherein the used cleaning solution comprises a cleaning fluid and an ink. The recovery section (42) is separated from the calming section (38) by means of a filter element (40) which is adapted to at least partially retain the ink in the calming section (38) such that a recovered cleaning solution is collected in the recovery section (42). Furthermore, a printing machine (10) comprising said system for recovering a cleaning solution is provided.
A printing system (10) is provided for printing on a material, comprising an ink formulation module (12) comprising at least one ink reservoir (14) and an ink adjustment system (16), a printing unit (18) for applying ink to the material, a sensor module (22) comprising at least one probe (24) for generating color measurement data, and a control module (25) being connected to the ink formulation module (12), the sensor module (22) and the printing unit (18). The color measurement data comprises at least one ink color value of the ink before being applied on the material by the printing unit (18). The control module (25) is configured to receive the color measurement data from the sensor module (22) and to transmit an ink adjustment request to the ink formulation module (12), wherein the ink formulation module (12) is configured to adjust the ink composition of the ink in the at least one ink reservoir (14) based on the ink adjustment request.
A method is provided for automatically exchanging a sleeve (18a) of a printing tool (18) mounted in a printing machine, in particular a flexographic printing machine, by means of a printing tool handling unit comprising a coupling interface. In one step of the method the printing tool handling unit is temporarily coupled to a coupling interface located at the end of a shaft (60) of the printing tool (18) with its coupling interface. In a further step, the printing tool handling unit transports the printing tool (18) to a separation unit (78) comprising at least one clamping device (80) and places the printing tool (18) in the clamping device (80) of the separation unit (78). The printing tool (18), in particular the sleeve (18a) of the printing tool (18), is clamped by the clamping device (80), and the printing tool handling unit separates the shaft (60) from the sleeve (18a) by pulling the shaft (60) out of the sleeve (18a) while the sleeve (18a) is clamped in the clamping device (80).
B41F 31/30 - Arrangements for tripping, lifting, adjusting, or removing inking rollers; Supports, bearings, or forks therefor
B41F 27/10 - Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders
B41F 27/14 - Devices for attaching printing elements or formes to supports for attaching printing formes to intermediate supports, e.g. adapter members
4.
PRINTING PLATE, METHOD FOR DETECTING A POSITION OF A PRINTING PLATE, CONTROL UNIT FOR A SYSTEM FOR DETECTING A POSITION OF A PRINTING PLATE, SYSTEM FOR DETECTING A POSITION OF A PRINTING PLATE, AND COMPUTER PROGRAM
A printing plate (10) having at least one optical marker (12, 14) for detecting a position of the printing plate (10) is described. The optical marker (12, 14) comprises an optically detectable structure (18) being positioned within a periphery (20) of the marker (12, 14). Furthermore, a method for detecting a position of a printing plate (10) is presented. Additionally, a control unit (38) for a system (36) for detecting a position of a printing plate (10) and a system (36) for detecting a position of a printing plate (10) are explained. Moreover, a computer program comprising computer readable program code means for causing steps of the method is defined.
B41F 27/00 - Devices for attaching printing elements or formes to supports
G06K 9/18 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints using printed characters having additional code marks or containing code marks, e.g. the character being composed of individual strokes of different shape, each representing a different code value
G06K 9/62 - Methods or arrangements for recognition using electronic means
5.
PRINTING MACHINE AND METHOD OF OPERATING A PRINTING MACHINE
A printing machine (10) comprises a doctor blade (14), a drive system (20) for urging the doctor blade (14) against a printing cylinder (16) of the printing machine (10), a sensor (32) adapted for sensing a force with which the doctor blade (14) is urged against the printing cylinder (16), and a mechanical locking element (34) adapted for locking the drive system (20) in its operating position. Further, a method of operating a printing machine (10) is presented.
A doctor blade system of a printing machine comprises a doctor blade (12), a blade support (14) and a clamping element (16), wherein the doctor blade (12) is arranged at a contact surface on a front side (20) of the blade support (14) and pressed against the contact surface by a pressing area of the clamping element (16). The clamping element (16) has a bearing surface arranged at a backside (27) of the blade support (14).
A refrigeration unit (26) for a printing machine is presented. It comprises a dryer interface (28) connectable to a dryer unit (18) of the printing machine in a heat conductive manner and a print interface (30) connectable to a printing unit (14) of the printing machine in a heat conductive manner, wherein the refrigeration unit (26) is adapted to transfer heat (32, 34) from the print interface (30) to the dryer interface (28). Furthermore, a printing machine is described. It comprises a printing unit (14) adapted for printing on a web of carrier material, a dryer unit (18) being adapted for drying printed web of carrier material, and a refrigeration unit (26) as mentioned above.
B41F 23/04 - Devices for treating the surfaces of sheets, webs or other articles in connection with printing by heat drying, by cooling, by applying powders
A drum support assembly (30, 32) for a printing machine is presented. It comprises a drum support body (30a, 32a) having a bearing interface (30b, 32b) for a drum, a lower guide (34) supporting the drum support body (30a, 32a) at a lower end thereof, and an upper guide (36) supporting the drum support body (30a, 32a) at an upper end thereof. Additionally, a pre-tensioning unit (50) is provided pre-tensioning the drum support body (30a, 32a) against the lower guide (34) and/or the upper guide (36). Furthermore, a printing machine is described, comprising a drum and a drum support assembly (30, 32) as described above.
A dryer unit (26), especially an intracolor dryer unit, for a printing machine is presented. It comprises a web inlet edge (34) and a web outlet edge (36) being substantially parallel to one another and defining a drying area (28) therebetween. Additionally, an air inlet and a first air outlet (38) being connected to the air inlet in an air-ducting manner are provided. The first air outlet (38) is positioned adjacent to one of the web inlet edge (34) and the web outlet edge (36) and a middle axis of the first air outlet (38) is inclined towards the respective other of the web inlet edge (34) and the web outlet edge (36) with respect to the drying area (28). Furthermore, a printing machine is described, comprising an impression drum, at least two ink application units and at least one dryer unit (26) as described above.
B41F 23/04 - Devices for treating the surfaces of sheets, webs or other articles in connection with printing by heat drying, by cooling, by applying powders
10.
PRINTING SYSTEM AND METHOD FOR ADJUSTING AN INK RECIPE OF A PRINTING SYSTEM
A printing system for printing on a material has an ink formulation module (18) for providing an ink recipe, a printing unit (12), a sensor for generating color measurement data (CMD), and a control module (16) being connected to the sensor (14) and to the printing unit (12). The color measurement data (CMD) comprises at least one actual ink color value and the control module (16) is configured to receive at least one unit parameter (UP) from the printing unit (12), to receive the color measurement data (CMD) from the sensor (14) and to transmit the at least one unit parameter (UP) and the color measurement data (CMD) to the ink formulation module (18). Moreover, the ink formulation module (18) is configured to create at least one adjusted recipe (AR). Furthermore, a method for adjusting an ink recipe of a printing system (10) is provided.
A clamping shaft (12) for a rotationally driven part (14) is described. It comprises at least one fluid chamber (28a, 28b) being located inside a shaft body (16) and being delimited by a piston (30a, 30b) and a cylinder part (32a. 32b). Additionally, the fluid chamber (28a, 28b) is delimited by an elastic clamping region (24a, 24b) having a first diameter if the piston (30a, 30b) and the cylinder part (32a, 32b) are in a first relative position, and a second diameter if the piston (30a, 30b) and the cylinder part (32a, 32b) are in a second relative position. Furthermore, a preloading unit (38) is provided, biasing the piston (30a, 30b) and the cylinder part (32a, 32b) towards the second relative position. Moreover, a printing cylinder unit (10) of a printing machine is presented comprising such a clamping shaft (12). Also, a method for operating a clamping shaft (12) is explained.
An ink supply system (10) comprises an ink chamber (12); an ink line (14) with a Venturi nozzle (16), wherein the ink chamber (12) has an inlet (18), which is connected to the ink line (14) upstream of the Venturi nozzle (16), and an outlet (24), which is connected to the suction side of the Venturi nozzle (16); an ink reservoir (30) from which the ink is transferred by a pump (28) to the inlet (18) and into the ink line (32); and an ink return line (32), which connects the downstream end of the Venturi nozzle (16) with the ink reservoir (30).
The invention relates to a processing system (10) for print substrates, having a processing machine (12) for print substrates, in particular a printing press (22), and a portable controller (14) for controlling the processing machine (12) for print substrates, said controller being separate from the processing machine (12) for print substrates, wherein an at least partly wireless communications link (29) for transmitting control instructions (K) is formed between the portable controller (14) and the processing machine (12) for print substrates. The controller (14) is designed to determine its position in relation to at least one component (18) of the processing machine (12). A method for controlling a processing machine (12) for print substrates is also described.
The invention relates to a printing press (10) having at least one electric motor (14) which is arranged at a distance of less than 0.5 m from an emission source (18). At least one blast protection wall (22) is provided, so that the distance (F) between the emission source (18) and the electric motor (14) is greater than 0.5 m.
The present invention relates to a drier for supplying a gas to a moving printed web in a rotary printing press, said drier comprising a nozzle body. The drier according to the invention is characterised in that the nozzle body has at least one opening for discharging heated gas and at least one opening for recirculating the cooled gas.
B41F 23/04 - Devices for treating the surfaces of sheets, webs or other articles in connection with printing by heat drying, by cooling, by applying powders
The invention is about a drying system to be applied on the central drum of a flexographic machine. The dryer is made of two concentric cylinders: the outer one having a slot - or several slots with different thicknesses - the inner one having a slot with a trapezoid shape. By adjusting the relative position of the trapeze and the outer slot sets the effective size of the vent, which determines the air flow coming out of the dryer. This results in a simple and reliable way of configuring the drying of the print.
The invention relates to a cover bearing system (14) to grip a sleeve (12) over a mandrel (16) in a printing press, in particular to how the gripper (24) is brought toward and away from the mandrel (16) and sleeve (12) assembly. The gripper (24) is disengaged from the sleeve (12), following first a straight path (42a) and then a helicoidal path (42b), thanks to an ad-hoc slot (42) machined on an axle (40). This allows to disengage the gripper (24) and set it out of the way for handling the sleeve (12), with a single motor (38) and a single instruction.
The invention is about a convenient way of fixing a sleeve over a mandrel in a press. The sleeve (20) is attached by applying a hydraulic pressure into the mandrel (16) which deforms itself and grips on the sleeve. The pressure is brought by a piston (36) mounted on a screw inside the mandrel, which when tightened increases the pressure and grips the sleeve.
A colour proofing apparatus, comprising: an engraved roller (12) having a pattern of ink accommodating cavities on its peripheral surface, a back pressure cylinder (14) forming a nip with the engraved roller (12), a conveyor (16) adapted to feed a sheet (18) of a print substrate through said nip in synchronism with the movements of the peripheral surfaces of the engraved roller (12) and the back pressure cylinder (14), and an optical sensor (30) disposed at the conveyor (16) for measuring a colour value of the sheet (18) that has passed through the nip.
A rotary printing press comprising a central impression cylinder (12) and a plurality of colour decks (A-J) disposed at the periphery thereof, each colour deck including a printing cylinder (18) adapted to be set against the central impression cylinder (12) and having a reference mark (36) arranged in its peripheral surface, the printing press further including a detector (52) for detecting the reference mark (36), characterized in that the detector (52) is arranged in the peripheral surface of the central impression cylinder (12).
B41F 5/18 - Rotary letterpress machines for printing on webs for multicolour printing using one impression cylinder co-operating with several forme cylinders
B41F 5/24 - Rotary letterpress machines for flexographic printing