EP2571694B1 - Formatbezogenes kaltfolienprägen - Google Patents

Formatbezogenes kaltfolienprägen Download PDF

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Publication number
EP2571694B1
EP2571694B1 EP11720074.1A EP11720074A EP2571694B1 EP 2571694 B1 EP2571694 B1 EP 2571694B1 EP 11720074 A EP11720074 A EP 11720074A EP 2571694 B1 EP2571694 B1 EP 2571694B1
Authority
EP
European Patent Office
Prior art keywords
press
foil
format
transfer
press roll
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP11720074.1A
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German (de)
English (en)
French (fr)
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EP2571694A1 (de
Inventor
Jürgen Schölzig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manroland Sheetfed GmbH
Original Assignee
Manroland Sheetfed GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Manroland Sheetfed GmbH filed Critical Manroland Sheetfed GmbH
Priority to PL11720074T priority Critical patent/PL2571694T3/pl
Publication of EP2571694A1 publication Critical patent/EP2571694A1/de
Application granted granted Critical
Publication of EP2571694B1 publication Critical patent/EP2571694B1/de
Active legal-status Critical Current
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    • 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
    • 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
    • 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
    • B41P2219/60—Using more than one printing foil

Definitions

  • the invention relates to a device for transferring imaging layers from a carrier foil to printed sheets according to the preamble of claims 1, 4, 5 and a method according to the preamble of claim 9.
  • a printing material and a printing apparatus using this material are described.
  • a sheet-processing machine which has a feeder and a boom, wherein printing units and a coating module are arranged between the two units.
  • 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 module 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 foil, 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 coating module, being brought by means of the press roller on the impression cylinder resting sheet with the film material in combination. At the same time, the metal layer lying down is narrow Connect to the adhesive areas on the sheet. After further transporting the printing sheet, the metallic layer adheres 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.
  • a device for cold foil stamping is known.
  • the film feed in a coating module for the transfer of imaging layers of a transfer film to a printing material is to be extended in its applicability.
  • a limited pressing surface is arranged in the coating module for transferring layers from the transfer film.
  • the transfer film is preferably guided past a press roll in a limited width and approximately tangentially.
  • special cyclically operable conveyors are assigned for this purpose.
  • the timing of the sheet feeding may be performed with respect to a circumferential break of cylinder knitting surfaces or with respect to the transfer sheet variable transfer zones variable on the circumference or across the width of cylinder knitting surfaces.
  • a cylinder with a flexible upper lift fastening device in a processing machine has a flexible, upper-lift fixing device provided with a fixing device disposed within the cylinder periphery. This is for separately securing a lower elevator between the cylinder circumference and the upper elevator disposed on the cylinder.
  • the lower elevator consists of a flexible carrier material on which a plurality of base forms are arranged at intervals.
  • the fixing device is drivable.
  • the lower elevator which is accommodated in the fixing device in the end fixing area, can thus be moved on the cylinder circumference.
  • at least one pad shape can be positioned to the upper elevator.
  • a cylinder is known.
  • the cylinder is covered with a rubber blanket.
  • the rubber blanket is provided with a base whose front and rear edges are cut at an angle to the starting edge of the cylinder channel in order to avoid channel reactions.
  • 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 can be done on a sheet safely, economically and accurately, the device should be manageable for an extended range of applications. In particular, a partial Folienaufbrihgung should be possible.
  • an imaging layer e.g. a metallization layer
  • the device provides a timing system for guiding the film web, wherein the pressing surface is highlighted depending on the format to be coated on the press roller.
  • the device is characterized in that a press roller has a pressing surface which occupies a partial area of the total area of a printed sheet.
  • such pressing surfaces are designed as below a blanket stretchable segments for the blanket provided on the press roll over the entire surface.
  • a neutral substructure of the corresponding press fabric is provided for the entire area of the press roll surface, a pad with or without a damping effect such.
  • a vacuum blanket which serves the leveling of the entire surface, while the format sheets come only in the work area of the film transfer itself.
  • a clamping spindle as in a blanket cylinder known or so-called combination clamping rails for blankets or printing plates, as known from the blanket cylinders or the form of cylinders.
  • the surface of the press cylinder elevator is also suitable for profiled embossing.
  • the press cylinder to a register system, e.g. can be executed via register pins.
  • the press cylinder may be further adjustable e.g. in the manner of a register system for automatic printing plate tension.
  • a side and a circumferential register can be adjusted as in the case of a forme cylinder, wherein the setting can be designed to be motor-driven and / or automatically executable.
  • the press cylinder elevator may be provided with register punches.
  • the device can also be used in an advantageous manner in order to achieve an improvement in the use of the film in that the transfer film into or several Partfolienbahnen smaller width is divided. In combination with the above-mentioned method, it is thus also possible to use different types of film side by side.
  • control of the transfer film is such that when passing through a surface opposite to the surface of the sheet counter-pressure cylinder surface area of the press roller, the film feed is stopped, wherein the press roller can then slide through under the transfer film, since the transfer film is not between the active surfaces in Transfer nip is trapped.
  • the applicator 1 may be a per se known offset printing unit with an inking unit 11, a plate cylinder 12 and a blanket cylinder 13.
  • the blanket cylinder 13 cooperates with a counter-pressure cylinder 4.
  • the coating unit 2 can also be formed by an offset printing unit.
  • 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 correspond to the blanket cylinder.
  • the press roll 3 may also correspond to the forme cylinder of a paint module.
  • a web guide 14 for transfer films is shown within the coating unit 2 used for the film transfer.
  • the transfer film 5 is thereby switched on and executed by protective devices 15 of the coating unit 2.
  • the film supply roll 8 is assigned to the coating unit 2 on the sheet feed side.
  • the film supply roll 8 has a rotary drive 7 for the continuous controlled feeding of the transfer film to the coating unit 2.
  • a film feed deflection or tension rollers for guiding the transfer film 5 may be provided in a substantially constant tension against the press roller 3.
  • a film collecting roller 9 is provided for the used sheet material.
  • One Rotary drive 7 on the film collection roller 9 is always advantageous. It can even be provided that the transfer film 5 is conveyed on the outlet side by means of the rotary drive 7 and held taut on the inlet side by means of a brake.
  • the press roll 3 (as a blanket cylinder or forme cylinder or separate press roll) carries on its surface a compressible or damping, e.g. also provided with a compressible intermediate layer element.
  • the press roll 3 can be provided with a press fabric 10, for example as a plastic cover, comparable to a blanket or blanket, which is held in a cylinder channel on clamping devices.
  • the film feed of the transfer film 5 from the film supply roll 8 to the transfer nip 6 and the film collection roller 9 is gradually controlled, the transfer film 5 is then stopped, if no transfer of imaging or covering layers should take place.
  • the associated device preferably includes a corresponding feed control for the transfer sheet 5, which ensures that at least the lying in the region of the press roller 3 and the impression cylinder 4 part of the film web is stationary as long as the cylinder channel 26 of the impression cylinder 4 passes. This will be later in FIGS. 2 to 4 Details explained.
  • a further improvement of the film utilization of the type described results when the transfer film 5 is divided into one or more Operafolienbahnen lesser width.
  • the utilization of the transfer film 5 can be improved even in zonally different lengths coating areas within an arc.
  • dryer 16 can be provided in the film application module thus formed from the applicator 1 and the coating unit 2, by means of which the adhesive application or the entire film coating can be dried.
  • UV dryers come into question.
  • the film application module may include a monitoring device 17 for scanning the sheet surface.
  • the monitoring device 17 enables the evaluation of image contents of the coating and the detection of defects in the film coating.
  • Such a monitoring device can also be provided in conjunction with the printing press, in which the film application module is integrated. Then it can be arranged for example in the sheet delivery of the printing press or a last printing unit.
  • the transport of the transfer film 5 can be monitored on or between film guide rollers 14 by checking the web tension of the film web 5.
  • a film web guide one or more web tension measuring devices 19 are provided for this purpose.
  • a stabilization device 30 can be arranged to stabilize the film web 5 between a first deflection roller and a first inlet roller to the transfer unit in order to reduce flapping movements of the film web 5.
  • the stabilizing device 30 has z. B. two rotatably mounted rollers, which is provided for the variable setting of the wrap angle of the film web 5 on the guide rollers, so that the guiding action and the damping effect on the film web 5 is adjustable depending on the operating state.
  • the adjustment of the stabilization device 30 can be carried out in conjunction with means for web tension control 19 and possibly a sensor device 20 for web break monitoring.
  • the additionally obtained information about the web tension as the actual value can be used for the control of the printing or transfer process.
  • the system can be coupled to a control station of the printing machine, via which the setpoint values for maximum and minimum web tension can be entered. This may depend on the type of transfer film 5 used and on the printing or transfer conditions in the coating module 2 in connection with the properties of the printing material, the adhesive or the press fabric.
  • the necessary data can be read via interfaces directly from data carriers to film supply rolls and changed by means of parameter values from the setting of the transfer process on the coating module 2.
  • the printing unit 50 has, as usual in offset printing units, the counter-pressure cylinder 40, an associated rubber or blanket cylinder 41 and a plate cylinder 43 associated therewith.
  • the plate cylinder 43 are here shown schematically an inking unit and a dampening unit assigned.
  • a further pressure gap 60 is formed.
  • ink is applied from a spanned on the plate cylinder 43 printing plate 44 via a arranged on the blanket cylinder 41 cover 42 on the sheet.
  • the gap of the printing gap 60 between the surfaces of the blanket cylinder 41 and the impression cylinder 40 is adjustable by means of the printing blanket cylinder 41 associated adjusting devices 45.
  • the setting referred to relates to the thickness of the printing material to be processed, which is to be printed in the printing nip 60.
  • a printing pressure is necessary to transfer the ink from the blanket cylinder 41 to the held on the impression cylinder 40 substrate.
  • the actuators 45, 46 are commonly used in offset printing on printing blanket or blanket cylinders of printing units or on cylinders of varnish modules.
  • a contoured or segmented pressing surface in the press fabric 10 in the press fabric 10.
  • segmented pressing areas instead of a full-surface pressing area, segmented pressing areas limited to one or more areas to be coated are used on the pressing roller 3.
  • the segmented pressing surface may be formed as an isolated surface element, as an annular, narrow surface element encircling the press roll 3, as a surface line following a limited peripheral portion covering over the width of the press roll 3 reaching surface element or in the form of several such surface elements pronounced and so the press fabric 10 form.
  • this limited segmented pressing surface in the press fabric 10 is that - similar to the passage of a cylinder channel of the press roll 3 and the opposite impression cylinder 4 - the entrapment of the transfer film 5 is given only if the segmented press surface the transfer film 5 touching the transfer nip. 6 passes.
  • the pressing surface should only be able to act on the transfer foil 5 in the areas where In fact, imaging layers are to be transferred from the transfer sheet 5 to the signature.
  • a pad with or without damping effect such as a vacuum blanket (but only in press clothing without rigid support layer) used.
  • Clamping systems in the cylinder channel of the press roll 3 for fastening the press fabric 10 can clamping spindles such as in a rubber cylinder or combination clamping rails for printing blankets or printing plates, as known from the rubber or the form cylinders.
  • the surface of the press fabric 10 is suitable depending on the structure for profiled imprints. This results in an extended range of applications for the process of cold foil stamping.
  • the drive of the film rolls 8, 9 is provided continuously, since the mass of the film rolls 8, 9 is too large for a quick change of the drive movement. This results in braking the film web to re-accelerating in the transfer area in the supply and discharge of the film web 5 relative to the movement of the film rolls 8, 9 excess or missing film lengths.
  • Such transition areas between film start and format or application start are also different in relation to each used in the invention used format documents, as later in connection with FIG. 5 will be explained.
  • FIG. 2 is a film transfer module accordingly FIG. 1 shown.
  • the dancer rollers 18 are arranged to regulate the web tension.
  • the drive groups 22 are described here for all subsequent embodiments and each show a pair of rollers that can pinch the film web 5 and thus defined in terms of a desired transport path can lead.
  • the pairs of rollers of the drive groups 22 are made in FIG. 2 each of a film guide roller 24 and a drive roller 23. Both the film guide roller 24 and the drive roller 23 is at least partially driven.
  • the drive of the drive roller 23 can be directed not only in the transport direction of the film web 5 (from film roll 8 to 9), but can also generate return strokes. This makes sense, since the film web 5 does not stop immediately when decelerating and thus runs over a desired breakpoint. As a result, a piece of the film web 5 could not be used.
  • this step reduces or eliminates this unnecessary film consumption.
  • the drive of the drive roller 23 can be controlled quickly.
  • the drive roller 23 itself can be segmented to quickly handle the changing drive motions to be able to execute.
  • the film guide roller 24 with respect to the drive roller 23 can be pivoted up and down, but it can also be permanently employed on the drive roller 23.
  • the film guide roller 24 perform a more or less controlled by the film web 5 movement, while the drive roller 23 performs a conveying movement and the return stroke movement.
  • the film guide roller 24 performs for a defined period in relation to the film transport direction a backward movement only by controlled hiring against the resting on the drive roller 23 film web 5.
  • the drive roller 23 then performs a continuous transport movement against the direction of the film web 5. This is possible because the film web 5 is freely movable at this time due to lack of contact pressure by the press roller 3 against the impression cylinder 4 in the transfer area.
  • the drive groups 22 can also hold the film web 5 in the transfer area under the necessary tension by braking at the time of sheet breakage, in this case at least on the feed side to the transfer nip 6, thus immediately upon restart of the film transfer with pressing by the press roller 3 against the impression cylinder 4 good transfer quality is achieved again.
  • the system of the drive group 22 is also suitable for segmented film guide rollers 24 in format width drive rollers 23 both for the guidance of a full-width film web 5 as well as for the guidance of, if necessary distributed distributed, partial film webs 5 suitable.
  • the segments of the film guide roller 24 can be arranged correspondingly adjustable to the positions of the partial film webs 5 in the axial direction to the press roller 3.
  • the drive group 22 can be simplified by designing the drive roller 23 with a rough or adhesive surface or as a suction roller. With a correspondingly large looping through the film web 5, sufficient adhesion for the secure guidance of the film web 5 on the drive roller 23 can then be achieved. Then it would be possible to dispense with a foil guide roller 24, even in segmented form. This is also in terms of the format widths Execution of the drive roller 23 harmless.
  • a drive roller 23 designed as a suction roller could then be designed in such a way that suction devices which can be switched as needed in segments corresponding to the respective film web widths to be processed are provided if required.
  • the dancer arrangement for compensating the conveying paths of the transfer film web 5 during the timing of the feed can also be designed in the form of loop guides for the transfer film web 5 operated by means of negative pressure.
  • the film supply and removal can be performed with controllable or self-regulating systems such as friction shafts and individual drives on the film rolls 8, 9 in the variants of a format-wide film roll or with multiple sub-film rolls.
  • the transfer film web 5 is guided past the press roller 3 in the region of the transfer gap 6 in an approximately tangential path.
  • a film section 5.1 in the region of the film inlet into the transfer nip 6 is guided by the film guide roller 14 at a corresponding angle with respect to a tangent through the transfer nip 6 into it.
  • the angle between the film sections 5.1 and 5.2 but also chosen so that the transfer film web 5 touches the surface of the press roller 3 only in a very narrow range. Ideally, this should be only a contact strip of a few mm in length on the circumference of the press roll 3 over the entire width of the press roll 3.
  • the formation of the narrow contact strip ensures that the timing of the movement of the transfer film web 5 at the moment of release or pressure reduction on the transfer film 5 in the transfer nip 6 can be done quickly by the transfer film 5 can be stopped as soon as possible. The same applies at the beginning of the conveying movement at the next beginning of a new transfer area (beginning of a press project or end of the cylinder channel).
  • FIG. 4 The arrangement of the extension of the film sections 5.1 and 5.2 in relation to a tangent T is in FIG. 4 also shown schematically.
  • FIGS. 3 and 4 the arrangement according to the invention of format documents for the press fabric 10 is shown.
  • FIG. 3 is the press fabric 10 for the press roll 3 shown in a planar view. It shows the work areas for a planned film transfer.
  • the working direction with respect to the direction of rotation of the press roll 3 is shown at the top by a directional arrow.
  • the work areas are marked by three format pads 30, 31, 32, which join the left edge (beginning of printing) of the press fabric 10 and opposite to the working direction of format edges K1, K2, K3 ends.
  • the size documents 30, 31, 32 are provided with a width corresponding to the required working areas and with the respective desired length of the working format arranged in the work area format edges K1, K2, K3 and cover so different areas of a Pressp on the circumference of the press roll 10 from.
  • this arrangement is schematically transferred to a cylindrical section through the press nip 3 forming the transfer nip 6 and the associated impression cylinder 4 with the direction of rotation being indicated.
  • the format documents 30, 31, 32 superimposed on each other in the view and therefore drawn different thickness.
  • the format edges K1, K2, K3 are now at different circumferential points of the surface of the press roll 3.
  • the press fabric 10 is placed in a line on the documents 30, 31, 32 and follows their surface contour.
  • fine steps are formed in the surface of the press fabric 10, after the end of which a corresponding reduction in pressure is achieved in the transfer nip 6, if a printed sheet is guided there together with the transfer film web 5 resting against the press roll 3. Due to the pressure reduction no film transfer can take place there, since the transfer film 5 is no longer clamped. This is shown here with respect to the base 30 and to the associated form edge K1.
  • the transfer sheet 5 is released in different circumferential positions with respect to the three working areas of the press.
  • the transfer film 5 is divided into three sub-film webs corresponding to the width of the work areas of the press substrate for the size documents 30, 31, 32.
  • FIG. 4 Furthermore, the leadership of the transfer film web 5 in film sections 5.1 and 5.2 shown before and after the transfer nip 6, as already in the context of FIG. 2 was explained.
  • a tangent T on the pressure roller 3 is shown by the transfer nip 6 as a dotted line. It can be seen that the angle of the film section 5.2 on the outlet side of the transfer film web 5 with respect to the tangent line T may be greater than that of the film section 5.1 on the inlet side before the transfer nip 6.
  • the respective angle of the film sections 5.1 and 5.2 with respect to the tangent line T determining Folienleitmaschine are indicated by dashed lines as guide rollers.
  • FIGS. 5a and 5b is shown schematically the arrangement of a press fabric according to the invention on the surface of a press roll 3 shown unwound.
  • the surface of the press roll 3 is designated in its extension in the direction of rotation with a format length 38.
  • the surface is followed by a cylinder channel 27.
  • FIG. 5a On the surface of the press roll 3, a backing sheet 39 extended over the entire surface is arranged. Over the underlay sheet 39, a size pad 30 used for pressing in the cold foil transfer is arranged. About the pad sheet 39 and the size pad 30, the press fabric 10 is attached. The fixation on the press roll 3 takes place with known clamping means.
  • FIG. 5b On the surface of the press roll 3, an over the entire surface extended format pad 31 is attached.
  • the size pad 31 is formed as a high-pressure plate or paint plate known technique. From such a high-pressure plate produced by known plate-making process Presssujet is worked out, which is shortened compared to the reaching over the format length 38 base of the high-pressure plate. Accordingly, a paint plate of known type can be formed.
  • the press nozzle forms the effective pressing surface of the size pad 31 used for the press-format-related pressing during cold foil transfer.
  • the press cover 10 is attached above the size pad 31.
  • the fixation of the press fabric 10 on the press roll 3 also takes place here with known clamping means.
  • a pad sheet be provided below the high pressure plate or paint plate.
  • transition areas Ü at the respectively illustrated transitions from the area outside the respectively defined printing format or press set to the beginning of the printing format at the edge of the size documents 30 or 31 in the arrangements according to FIG FIGS. 5a and 5b determine.
  • the printing format or press pattern used here is designated as the application length AL.
  • transition areas Ü result from the transition of the support of the press fabric 10 from the press roll 3 or a support such as the support sheet 39 or the base region of the high-pressure plate or the stripped paint plate except for the size documents 30 and 31st
  • transition region Ü is then set a start-stop ramp for the acceleration and braking movement of the film web 5 in the film timing. This is necessary for safety reasons to ensure complete film transfer.
  • Is in FIG. 5b executed an arrangement without press fabric 10, then this transition region Ü - as indicated by the dashed arrows - almost reduced to zero.
  • the start-stop ramp can then be very short.
  • the start-stop ramp can be adjusted via a corresponding control software for driving the film web 5 and is the same or different adjustable for both format edges, ie at startup and in the process.
  • control parameters for the film timing are entered automatically via a control station or manually by the operator.
  • the control of the film timing then takes place, depending on the nature of the size pad 30, 31 or the structure of format pad 30, 31 and press cover 10 automatically in adapted start-stop ramps.
  • FIGS. 6 and 7 the arrangement of a press fabric 10 is shown with respect to a printing format of the same length format documents 32, 33, 34, the may have a same length in the circumferential direction of the press roll 3, but are arranged in each case different assignment to over the format length 38 extending working surface of the press roll 3 with respect to the circumferential direction.
  • FIG. 6 three developments of the surface of the press roll 3 are shown.
  • the effective working surface of the press roll 3 is designated by limiting arrows as the format length 38, which extends in the direction of the circumference of the press roll 3.
  • the working surface of the press roller 3 is bounded by a cylinder channel 27, which is here shown in each case at the right end of the format length 38, ie at a printing end 29 and which extends mutatis mutandis to the press roller 3 to a pressure start 28.
  • a size pad 32 or 33 or 34 is shown on the work surface of the press roll 3, each covering a shorter print format for cold foil transfer that does not extend over the entire format length 38.
  • the press fabric 10 covers each case the press roller 3 over the entire format length 38 from.
  • the size pad 32 extends from the print start 28 to a position spaced from the print end 29.
  • a print format for the cold foil transfer can be covered, which extends over the shorter print format corresponding to the size pad 32, starting at the beginning of the print 28 and ending before the print end 29, the format length 38.
  • the size pad 33 extends at a distance from the beginning of the print 28 to a position spaced from the print end 29.
  • a print format for the cold foil transfer can be covered, which extends over the shorter print format corresponding to the size pad 33, starting after the print start 28 and ending before the print end 29, the format length 37.
  • the size pad 34 is extended to the printing end 29 at a distance after the print start 28.
  • a print format for the cold foil transfer can be covered, which ends on the shorter print format according to the size pad 34, starting after the print start 28 and ending at the end of printing 29, the format length 38.
  • FIG. 7 the arrangement of the size documents 32, 33, 34 in the plan view of the unrolled shown working surface of the press roller 3 is shown.
  • the format pad 32 is in this case in a corresponding to the first part of the figure FIG. 6 designated narrow working track A shown.
  • the format pad 33 is in this case in accordance with the first part of the figure FIG. 6 designated narrow working track B shown.
  • the format pad 34 is in this case in accordance with the first part of the figure FIG. 6 designated narrow working track C shown.
  • the size pads 32, 33, 34 can also extend in their respective position to the format length 38 across the entire width transversely to the movement or circumferential direction of the press roller 3.
  • FIG. 8 a distributed arrangement of format documents 34, 35, 36 and 37 on the working surface of the press roll 3 is shown.
  • the work surface is again designated by the format length 38.
  • the format documents 34 to 37 are distributed in each of a work tracks D, E and F.
  • the format pad 34 is assigned to the print start 28 next.
  • the format documents 35 and 36 are arranged one behind the other wherein the format pad 36 is assigned to the printing end 29 next.
  • the format pad 37 is placed in a middle region between the beginning of printing 28 and the end of printing 29.
  • the formation of the effective pressing surfaces with the press fabric 10 is shown schematically in the circumferential direction of the press roller 3 to the right of the representation of the entire work surface.
  • Such an arrangement can be achieved by pre-mounting the format pads 34 to 37 on a mounting pad 48.
  • the format documents 34 to 37 may be formed as self-adhesive elements. They can also be attached by means of magnetically acting adhesive.
  • a high-pressure plate or a paint plate known technique accordingly FIG. 5b be used on the format documents 34 to 37 are worked out accordingly.
  • the mounting pad 48 or a corresponding high-pressure plate are preferably provided for register-level mounting on the press roller 3 with register means 47. These are formed, for example, as known register punches on the start of printing 28 and cooperate with corresponding stop devices, such as register pins, on the press roller 3.
  • register means 47 are formed, for example, as known register punches on the start of printing 28 and cooperate with corresponding stop devices, such as register pins, on the press roller 3.
  • an adjusting device not shown here, in conjunction with the mounting pad 48 may be provided.
  • the mounting pad 48 can be positioned independently below the press fabric 10, to adjust the position of the Pressps the format documents 34 to 37 on the working surface of the press roller 3.
  • the embodiment according to FIG. 8 is particularly suitable for the use of partial film webs for reduced cold foil transfer.
  • the film feed and the film removal of the coating module 2 are then provided with means for unwinding and winding of partial film webs.
  • the sectionfolienbahnen are chosen here only as wide as that of the format documents 34 to 37 is specified.
  • the film transport can then be stopped separately for each partial film web in the region of the non-elevated surfaces on the press roller 3 and in the region of the cylinder channel 27.
  • the measures for implementing the mode of operation according to the invention are simple and can be realized for common types of press rolls 3 in the form of blanket or blanket or blanket cylinders.
  • the format documents 30 to 37 can be full-surface or partial area (see Fig. 3 . 7 and 8th ) are mounted in virtually any conceivable arrangement on the press roller 3. In this case, an assembly together with the press cover 10 or separately executable.
  • the size documents 30 to 37 may be formed as a conventionally used underlay sheet for blankets or as aufklebbare on the surface of the press roll 3 documents from self-adhesive film.
  • the format documents 30 to 37 are formed from so-called calibrated material whose thickness is precisely determined and whose flatness is of high quality in order to ensure a uniform Beistelltik for the cold foil transfer in the transfer nip 6.
  • a stripped rubber blanket or a paint plate for the production of the size documents 30 to 37 is used.
  • the blanket or the paint plate then preferably has a metal support plate and a photopolymer surface.
  • a pad sheet is provided with a blanket as press fabric 10 so that the underlay sheets then allow the cold foil transfer over the desired application length AL.

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EP11720074.1A 2010-05-17 2011-05-06 Formatbezogenes kaltfolienprägen Active EP2571694B1 (de)

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CN102985257A (zh) 2013-03-20
PL2571694T3 (pl) 2015-08-31
EP2571694A1 (de) 2013-03-27

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