A printing system comprising a flexographic printing machine comprising at least one impression cylinder, on which the material in sheet form to be printed is wound and around which at least one printing station is arranged. Each printing station comprises a plate cylinder, which is provided with a graphic element, and an anilox roller. Downstream of each printing station there is at least one drying unit for the inks which emits at least one first air flow and aspirates at least one second air flow; there are also elements for acquiring a coverage value of the graphic element present on the plate cylinder of each printing station and elements for automatically adjusting a flow rate of the first air flow and of the second air flow as a function of the coverage value of the graphic element acquired by the acquisition elements.
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
An apparatus for replacing printing sleeves which comprises a handling device which can be removably engaged with a printing sleeve and a movement robot for moving the handling device; the handling device comprises a supporting frame and a self-centering grip clamp which is able to translate on command, with respect to the supporting frame, along a movement direction that is substantially parallel to the axis of the supporting rod, between an advanced working position and a retracted working position; the grip clamp has engagement elements which are movable on command between an inactive position and an active position, in which they are radially spaced apart from the axis of the supporting rod, in order to allow their engagement with the internal surface of the printing sleeve.
An apparatus for replacing printing sleeves comprising a handling device which can be removably engaged with a printing sleeve and a movement robot for moving the handling device; the handling device comprises a supporting frame, which is connected to the movement robot and supports a supporting rod which protrudes in a cantilevered manner from the supporting frame, and a grip assembly which is able to translate on command, with respect to the supporting frame, along a movement direction that is substantially parallel to the axis of the supporting rod, between an advanced working position and a retracted working position; the grip assembly is actuatable in rotation about an axis that is substantially parallel to the axis of the supporting rod.
A printing machine which comprises advancement elements for advancing material in sheet form to be printed which are provided at least with a traction drum which can rotate about its own axis and is designed to receive, at an entry region, the material in sheet form to be printed and to convey it toward an exit region for the exit of the material in sheet form from the traction drum, the exit region being spaced circumferentially apart, along the direction of rotation of the traction drum about its own axis, from the entry region. Analog print stations are arranged around the traction drum, between the entry region and the exit region. The printing machine further comprises, between at least two analog print stations, conveyance means for conveying the material in sheet form to be printed which arrives from the traction drum along an advancement path that has at least one advancement portion for advancing the material in sheet form to be printed which extends substantially straight, along which at least one digital print station is arranged.
B41F 21/00 - Devices for conveying sheets through printing apparatus or machines
B41F 5/02 - Rotary letterpress machines for printing on sheets
B41F 5/24 - Rotary letterpress machines for flexographic printing
B41F 7/02 - Rotary lithographic machines for offset printing
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 machine for digital printing on tape, which comprises a frame (2) that supports means (3) for entraining at least one tape (4) along an advancement path and is provided with at least one printing assembly (5), which comprises at least one ink-jet printing head (6); downstream of the printing assembly (5), along the advancement direction of the tape (4), there is at least one assembly (7) for drying the inks applied to the tape (4); according to the invention, the drying assembly (7) comprises a temperature-adjustable drum (8) for supporting and entraining the tape (4), adhesion means adapted to allow the retention in adhesion of the tape (4) on the outer lateral surface of the drum (8), and hot air emitter means (9) which face at least one portion of the outer lateral surface of the drum (8).
B41F 13/02 - Conveying or guiding webs through presses or machines
B41F 19/00 - Apparatus or machines for carrying out printing operations combined with other operations
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
B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
A machine for manufacturing printed laminated films, particularly for packaging, which comprises a frame (2) that supports means of traction of at least one primary film (3) along an advancement path and means (4) of printing the primary film (3) which are interposed along the advancement path. According to the invention, on the frame (2) there are, in mutual succession, downstream of the printing means (4), along the advancement direction of the primary film (3), means (5) of laminating a secondary film (6) to the primary film (3) with the interposition of an adhesive material and means of electron beam polymerization of the adhesive material.
B32B 39/00 - Layout of apparatus or plants, e.g. modular laminating systems
B41F 19/00 - Apparatus or machines for carrying out printing operations combined with other operations
B41F 5/24 - Rotary letterpress machines for flexographic printing
B65H 35/00 - Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
An inking device for printing machines that comprises an inking body (2) which is designed to be arranged so as to face the lateral surface of an anilox roller (3) and forms an inking chamber (7) that is open toward the anilox roller (3) and has at least one inlet (8) for introducing the ink into the inking chamber (7) and at least one outlet (9) for the exit of the ink from the inking chamber (7). The particularity of the invention consists in the fact that it comprises control means (13) that are adapted to vary the passage opening (9a) of the or of each outlet (9) as a function of the pressure of the ink in the inking chamber (7).
A system for adjusting and monitoring the pressures of the printing rollers of a flexographic printing machine, which comprises at least one reader (7) which is adapted to be placed at the printing rollers (3, 4) of the printing machine. The reader (7) is adapted to detect the contrast of the print on the printing material (8) wrapped around the central drum (2) of the printing machine and is connected to a processing unit (10) which is adapted to determine and control, as a function of the contrast detected by the reader (7), the position of the printing rollers (3, 4) with respect to the central drum (2) in order to achieve the desired print.
An anilox roller for flexographic printing machines, which comprises a sleeve cylinder rotatably supported about its own axis by the fixed structure of a flexographic printing machine, and an anilox sleeve, which has a tubular body provided, on its outer side wall, with an anilox surface which can be axially fitted on and removed from the sleeve cylinder. Forced circulation of a temperature control fluid within the tubular body is further provided.
patents
