Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
  • B41F19/02—Apparatus or machines for carrying out printing operations combined with other operations with embossing
  • B41F19/06—Printing and embossing between a negative and a positive forme after inking and wiping the negative forme; Printing from an ink band treated with colour or "gold"
  • B41F19/062—Presses of the rotary type
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
  • B41P2217/00—Printing machines of special types or for particular purposes
  • B41P2217/10—Printing machines of special types or for particular purposes characterised by their constructional features
  • B41P2217/11—Machines with modular units, i.e. with units exchangeable as a whole
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
  • B41P2219/00—Printing presses using a heated printing foil
  • B41P2219/20—Arrangements for moving, supporting or positioning the printing foil
  • B41P2219/22—Guiding or tensioning the printing foil
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
  • B41P2219/00—Printing presses using a heated printing foil
  • B41P2219/50—Printing presses using a heated printing foil combined with existing presses
  • B41P2219/51—Converting existing presses to foil printing presses

Definitions

• the invention relates to a device for transferring imaging layers from a carrier film to printing sheet according to the preamble of patent claim 1.
• EP 0 569 520 B1 describes a printing material and a printing device using this material.
• a sheet-processing machine which has a feeder and a boom, between two units printing units and a coating unit are arranged.
• an adhesive pattern is applied by means of the planographic printing process. This adhesive pattern is applied in a cold printing process and has a specific imaging subject.
• a film guide is provided in the printing unit following the coating unit with a counter-pressure cylinder and a press roller.
• the transfer film has a carrier layer on which imaging layers such as metallic layers, for example of aluminum, can be applied. Between the metallic layer and the carrier film, a separating layer is provided, which ensures that the metallic layer can be removed from the carrier layer.
• each sheet is given an adhesive pattern. Thereafter, the sheet is passed through the loading lamination, wherein by means of the press roller on the impression cylinder resting sheet is brought into contact with the sheet material. In this case, the downwardly lying metallic layer enters into a close connection with the areas provided with adhesive on the printed sheet. To the further transport of the printed sheet adheres to the metallic layer only in the area provided with the adhesive pattern. The carrier film is thus removed from the metallic layer in the region of the adhesive pattern. The used in this way transfer film is wound up again. The print sheet is laid out in the coated state.
• the object of the invention is therefore to provide a device by means of which the transfer of an imaging layer, e.g. a metallization layer on a sheet can be done safely, economically and accurately, the device should be easy to handle.
• an imaging layer e.g. a metallization layer on a sheet
• a feed device is used for guiding the transfer film, in which the transfer film is guided during feeding to the transfer nip by a modular guide system.
• the device can also be advantageously used in order to improve the use of the film by dividing the transfer film into one or more partial film webs of lesser width. In combination with the above-mentioned method, it is thus also possible to use different types of film side by side.
• recording devices or aggregate assemblies existing within a printing unit are used to receive or integrate guide devices for film transport.
• a guide for a removable from the printing blanket blanket washing device in the machine frame permanently mounted recording devices exhibit.
• Folienleit coupled with the receiving devices corresponding holding elements.
• the corresponding assembly or disassembly is preferably done without tools.
• the assembly is preferably carried out in sheet travel direction from the printing unit broadside.
• a printing cylinder blowing device provided in the printing unit, which serves for sheet guiding.
• the assembly of guide devices can optionally also be made on the face side to a printing unit by insertion into mounting holes.
• an integrated cardboard guide or blowing bar can be used directly as a guide for guiding the transfer film into the transfer nip.
• Correspondingly designed deflection rollers can be adjusted so that the entry angle of the film web is adjustable in the transfer nip.
• a film guide may be on the outlet side of the film web, if necessary, a channel o- an active protection against intrusion integrated on a printing unit protection integrated.
• the printing unit protection can furthermore be adjustable into a guide position, in which the channel for discharging the film web at the guide devices is released. This setting can be done automatically when operating with foil application. During normal machine operation, the print protection also automatically closes the channel again.
• a film guide may be integrally formed on the outlet side of the film web, if necessary, an active protective device against engagement as an adapter element with quick-release device on a printing unit protection.
• the function can be designed as described above.
• the automatic control can be connected to the insertion or removal of the adapter element on the printing unit protection.
• FIG. 1 shows a sheet-processing machine, here a printing machine with two printing units.
• a cold foil transfer process is performed.
• a sheet is first provided with an imaging adhesive pattern (applicator 1 with inking / dampening unit 11, plate cylinder 12 and rubber or blanket cylinder 13).
• an imaging adhesive pattern (applicator 1 with inking / dampening unit 11, plate cylinder 12 and rubber or blanket cylinder 13).
• a transfer sheet 5 is passed through a transfer nip 6 in the following printing unit together with a printing sheet, wherein the transfer sheet 5 is pressed in the transfer nip 6 against the sheet (coating unit 2 with press roller 3 and impression cylinder 4).
• the transfer nip 6 in the coating unit 2 is formed by a press roll 3 and an impression cylinder 4.
• the press roller 3 may be the blanket cylinder of an offset printing unit or the forme cylinder of a lacquer module of a sheet-fed press, preferably a sheetfed offset press.
• Transfer films 5 have a carrier layer and a release layer to form an imaging layer.
• the separating layer serves to facilitate lifting of the imaging layer from the carrier layer.
• the image-forming layer may be a metallized layer or a glossy layer or a texture layer or a colored layer or a layer containing one or more image patterns.
• the film supply roll 8 is assigned to the coating unit 2 on the side of the sheet feed.
• the film supply roll 8 has a rotary drive 7.
• the rotary drive 7 is required for the continuous controlled feeding of the transfer film to the coating unit 2 and is therefore controllable. Furthermore, a deflecting or tensioning roller is provided in the region of the film feed. Thus, the film web of the transfer film 5 is always held in the same tension against the press roller 3. On the downstream side of the coating unit 2, a film collecting roller 9 is arranged, is wound on the used sheet material again. For optimized production, a rotary drive 7 is provided, which is controllable. The transfer film 5 can also be moved by the rotary drive 7 on the discharge side and kept taut on the inlet side by means of a brake.
• the surface of the press roll. 3 is equipped by means of a compressible, damping element.
• the press roll 3 can be provided with a press fabric 10, for example, as a plastic coating, comparable to a blanket or blanket.
• the press fabric 10 is held in a cylinder channel on clamping devices.
• the press fabric 10 is provided to improve the transfer properties in the transfer nip 6 with a specific elasticity or compressibility, which can be generated by means of conventional printing blankets or combined coverings of a blanket and a pad.
• one or more pressing areas limited to subject areas can be provided directly on the press roll 3 or on the press fabric.
• the arrangement of a press roll can also be carried out within an integrated film transfer module FA together with a processing unit within the scope of the invention.
• a printing unit here, for example, applicator 1 in Fig. 1
• an additional device for adhesive application to the impression cylinder 4 can be arranged upstream of the transfer nip 6 on a printing unit (here, for example, coating unit 2 according to FIG. Both embodiments result in a compact design.
• driers 25 can be provided downstream of the applicator 1 or the coating unit 2.
• driers 25 can be provided downstream of the applicator 1 or the coating unit 2.
• the coating unit 2 can be provided downstream of a monitoring system 26 for sheet inspection. Defects in the cold foil stamping process can be identified by means of such a monitoring system 26 in addition to errors in the transfer image.
• the film advance of the transfer film 5 from the film supply roll 8 to the transfer nip 6 and to the film collection roller 9 is controllable such that as far as possible the transfer film 5 is then stopped, if no transfer of the imaging layer should take place:
• a control of the transfer film 5 can be carried out such that the transport of the transfer film 5 is stopped when a gripper of the sheet-guiding counter-pressure cylinder 4 accommodates the cylinder channel and a correlating cylinder channel of the press roller 3.
• the timing of the film feed can be executed in accordance with a necessary acceleration or braking of the film supply roll 8 or film collection roller 9 via so-called dancer rollers 18 or the rotary drives 7 of the film rolls 8, 9.
• a device shown in Figure 2 for Folient- tion on a press roll 3 is provided, which is substantially tangential to
• Press roll 3 is guided by the transfer nip 6 with the impression cylinder 4 of the coating plant 2.
• These include a corresponding film guiding device 20 and a film feeding device 30, which are described below, and guide the film web 5 in the transporting direction T through the coating mechanism 3.
• a film guide 14 which is aligned approximately tangentially between the press roll 3 and the impression cylinder 4 and forms a wrap of the press roll 3 by less than 90 degrees. This achieves a defined application and guidance of the film web 5 on the press roller 3 and at the same time the necessary conditions for a possible film timing or film discontinuity in the transfer nip 6 during a passage through the channel in the transfer nip 6, but also for the use of narrow film webs 5, created.
• the film guide 14 for a film web 5 or partial film webs 19 includes on the feed side to the transfer nip 6 starting from an inlet opening 16 on a printing unit protection 15 some guide rollers 22. These can be arranged differently depending on the configuration of the printing unit.
• the film guide 14 may be arranged in accordance with FIG. 2 in conjunction with a Druckzylinderblasvorraum 36.
• This has blow holes for the formation of blow jets S, which are used on the one hand to guide a printing material B on the impression cylinder 4 when entering the transfer nip 6.
• the Druckzylinderblasvortechnik 36 may also be directed to the pneumatic support on the film web 5 in order to spread this wrinkle-free and tight. If necessary, one of the guide rollers 22 for guiding the film web 5 can be replaced by means of an appropriate arrangement of the printing cylinder blowing device 36.
• Part of the film guide 14 can furthermore be a mechanical or pneumatic guide element on the edge of the printing mechanism protection 15 in the region of the inlet opening 16 which seals the film web 5 when running into the coating unit 2 taut and holds.
• the film web 5 is also passed to a cleaning device 39, which is assigned to the press roller 3.
• the cleaner 39 removes stains resulting from the film processing from the press roller 3.
• Another part of the film guide 14 includes on the discharge side of the transfer nip 6 starting at an exit opening 17 on a printing unit protection 15 further guide rollers 32, 34. These may in turn be arranged differently depending on the configuration of the printing unit.
• the film guide 14 is arranged here in conjunction with an inlet protection 33. This serves to secure the transfer gap 6 against unintentional interventions.
• the film web 5 can be guided around the inlet protection 33 or through openings in its contour.
• the guide rollers 32, 34 may be arranged in conjunction with the printing unit protection 15, so that they take along the film web 5 during its displacement.
• the guide roller 34 may be arranged to be adjustable, so that the wrap angle of the film web 5 on the press roller 3 is adjustable.
• the transfer film 5 can come into contact with the counter-pressure cylinder 4 during a channel pass in the transfer nip 6 with grippers G.
• the grippers G hold a sheet B at its front edge on the impression cylinder 3 for secure transport through the transfer nip 6 fixed. With their so-called gripper back in the region of the pinching of the edge of the printing sheet B, they project to a slight extent over the circumference of the counter-pressure cylinder 4. Coordination with a channel likewise present on the press roll 3 is selected such that its associated edge comes into contact with the impression cylinder 4 only after the contour of the gripper G has arrived.
• the grippers G can press into the film web 5 which is not supported there.
• the gripper G are formed with a projecting in the smallest possible extent over the circumference of the impression cylinder 4 contour.
• systems of grippers G can be used, the total are permanently or cyclically adjustable radially to the impression cylinder 4, so that the height of the gripper G can be minimized over the cylinder contour.
• the film guide can be further supported by the fact that the cylinder channel of the press roll 3 is provided with a cover for largely cylindrical complement of the surface of the press roll. As a result, the film web 5 is indeed brought closer to the impression cylinder 4 in the area of the gripper G, but the film guide is overall more continuous and quiet.
• the guide of the transfer film 5 can be influenced by a further guide roller, which is arranged in the region after the film removal from the film supply roll 8.
• this guide roller 38 which is adjustable in its axial position relative to the position of the axis of the film supply roll 8, unevenness or irregularities of the film flow from the film supply roll 8 can be compensated for feeding the film web 5 to the film guide 14.
• a slide-in cassette 21 is provided with guide elements made of metal and / or plastic (CFK).
• guide elements by means of integrated initially rotating guide rollers 22 are provided. Air-purged blow rods or blow rods made of sintered metal with air outlet can also be used for the film web 5, so that the transfer film 5 is carried on an air cushion.
• the guide rollers 22 may be made of aluminum or reinforced plastic, such as CFRP, so they are easy to build and thus enter the lowest possible stress in the film web 5.
• the guide rollers 22 may be surface-coated, for example with Teflon or other the adhesion of the transfer film 5-reducing coatings.
• the guide rollers 23 preferably form a guide channel 24 and serve both for guiding the film (deflection) during the film run and also as an insertion aid in the film feed at the beginning a production process.
• the drawer cassette 21 may be associated with a printing cylinder blowing apparatus or the drawer cassette 21 may be configured together with the printing cylinder blowing apparatus as a unit. Thus, the drawer cartridge 21 can be used simultaneously for sheet guiding on the impression cylinder 4.
• the film guiding device 20 can furthermore be supported by means for generating blowing air.
• it may have at the film exit to the transfer nip 6 between the press roller 3 and the impression cylinder 4, a blowing device 16 which directs one or more bundled or fan-shaped air jets S for sheet guiding below the film web 5 on the substrate.
• the combination comes with a Druckzylinderblasvorraum in question.
• the film guiding device 20 can have easily replaceable guide elements, for example the guide rollers 22 or the guide plates 23, at the particularly critical deflection or exit positions, so that the wear parts can easily be replaced during service.
• the Folienleit nails 20 may be associated with a carton guide or integrated with this in a structural unit to prevent contact between the film web 5 and substrate (cardboard) even before their entry into the transfer nip 6 between the press roller 3 and the impression cylinder 4.
• a support plate 29 is optionally applied with blown air, arranged.
• a baffle 27 can be temporarily inserted for film feeding.
• a film deflection is preferably in an existing printing unit protection 15 of the coating unit 2, for example. a protection for an automatic plate feeder, integrated.
• a guide roller 32 or a coated guide plate 28 or a possibly luftum Spaten deflection is possible.
• said printing unit protectors 15 can automatically be moved into a defined, preselectable and lockable opening position, so that an appropriately dimensioned inlet opening 16 or outlet opening 17 is created for the film web 5.
• a guide or drawstring or strip of metal or plastic or foil is attached to the foil leading edge of the unwinding roll.
• the film web 5 can be pushed or pulled through the film guide 20 within the coating unit 2.
• the coating unit 2 can also be assigned a partially or fully automated feeder device 30, eg by means of a cable pull, chain hoist, belt. In this case, both the entire path of the film web 5 or only the area within the coating plant (printing unit of a sheet-fed offset printing machine or paint module in a sheet-fed printing machine).
• a film feed and a film guide within a coating unit 2 are made possible. This ensures operability at all times and setup times are minimized.
• existing recording devices or aggregate assemblies are used within a printing unit to receive or integrate guide devices for film transport.
• a guide for a removable from the printing unit blanket washing device U in the machine frame permanently mounted recording devices have, can be used in the Folienleit Sken with corresponding holding elements.
• the assembly is preferably carried out in sheet travel direction from the printing unit broadside.
• a pressure cylinder blowing device V provided in the printing unit.
• the mounting of the guide can be effected on the face side to form a printing unit by insertion into mounting openings.
• an integrated cardboard guide or blow rod X can be used directly as a guide of the transfer film in the transfer nip.
• a film guide may be on the outlet side of the film web, if necessary, a channel o- an active protective device Y against engagement forming in the vicinity of a printing unit protection 15 integrated.
• a film guide can be integrally formed on the outlet side of the film web, if necessary, an active protective device against engagement as an adapter element Z with quick-release device on a printing unit protection.

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• Rotary Presses (AREA)
• Decoration By Transfer Pictures (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=39313198

Family Applications (1)

Country Status (5)

Families Citing this family (3)

Citations (1)

Family Cites Families (3)

• 2006
  • 2006-12-29 DE DE200610062012 patent/DE102006062012A1/de not_active Ceased
• 2007
  • 2007-12-04 WO PCT/EP2007/010509 patent/WO2008080487A1/de active Application Filing
  • 2007-12-04 EP EP07856351A patent/EP2106347A1/de not_active Withdrawn
  • 2007-12-04 JP JP2009543353A patent/JP2010514591A/ja active Pending
  • 2007-12-04 CN CNA2007800484900A patent/CN101605660A/zh active Pending

Patent Citations (1)

Non-Patent Citations (1)

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