EP1737660B1 - Device for embossed film printing - Google Patents

Abstract

To transfer an image-type coating from a backing film to a printed sheet, an image-type adhesive layer is applied to the printed sheet. In a coating unit (2), the backing film comprising the image-type coating is rolled over the printed sheet using contact pressure, in such a way that the coating adheres to the adhesive sections, thus forming an image. To improve the flexibility of this application in a printing press, either the coating unit or the adhesive application unit (1) and the coating unit (2) are located in one or more coating modules of a printing press, thus producing a compact film transfer module (F) in a simple manner.

Description

The invention relates to a processing sheet printing machine according to US 5565054 which includes a device for transferring image-forming layers from a carrier foil to printed sheets.

It is known to produce metallic layers on printed sheets by means of a film transfer process. So is in the EP 0 569 520 B1 a printing material and a printing apparatus using this material are described. In this case, a sheet-processing machine is shown, which has a feeder and a boom, between two units printing units and a coating unit are arranged. In at least one of the printing 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. In the printing unit following the coating unit with a counter-pressure cylinder and a transfer cylinder a film guide is provided. This is designed in such a way that a film strip or a transfer film is passed through the printing nip of the coating unit between the impression cylinder and the transfer cylinder from a film roll. The foil strip is rewound on the outlet side after leaving the coating unit. 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.
When printing sheets are transported through the printing unit, each sheet is given an adhesive pattern. Thereafter, the sheet is passed through the coating unit, wherein by means of the transfer cylinder, the resting on the impression cylinder sheet is brought into contact with the film material. In this case, the downwardly lying metallic layer enters into a close connection with the areas provided with adhesive on the printed 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.

It is known to use such coating units, for example in printing units of printing presses. However, this blocks the appropriate printing works for use in printing images. In addition, the conversion of the affected printing units is complex.

OBJECT OF THE INVENTION

The object of the invention is therefore to provide a device by means of which a flexible use of a printing machine is made possible when using the stamping foil printing.

The solution to this problem arises from the features of claim 1.

In a particularly advantageous manner, the transfer film in at least one coating module, which is preferably arranged downstream of one or more printing units of a printing press, brought on a counter-pressure cylinder by a transfer cylinder with the printing material in touch.

Within the sheet-processing machine receiving the coating unit, the coating unit can advantageously be placed anywhere on the machine. In this way, in the case of a printing press having a plurality of printing units, it is possible for imaging coatings or metallization layers to be applied both before, as well as after and also between the application of printing ink layers.

Advantageously, the coating unit is designed as a coating module in the manner of a transportable unit.

Advantageously, according to the device according to the invention, it is also possible to provide a plurality of coating units behind one another within a sheet-processing machine in a particularly simple manner. Thus, the application of different imaging coatings or metallization layers within a subject can take place one after the other. In this case, it is possible to provide a first adhesive pattern in a first coating unit with a first image-forming coating and, in the following, superimpose another, to apply the first enclosing adhesive pattern and to provide it with another imaging coating.

In the following the invention is illustrated in more detail with reference to figures.

• Fig. 1 eine erste schematische Darstellung einer Einrichtung für den Folientransfer an einem Gegendruckzylinder,
• Fig. 2 eine zweite schematische Darstellung einer Einrichtung für den Folientransfer an einem Gegendruckzylinder,
• Fig. 3 eine Darstellung einer ersten Maschine mit einer Foüentransfereinrichtung, und
• Fig. 4 eine Darstellung einer zweiten Maschine mit einer Folientransfereinrichtung,
• Fig. 5 eine annähernd tangentiale Folienführung gemäß Fig. 3,
• Fig. 6 eine annähernd tangentiale Folienführung gemäß Fig. 4.

Showing:

• Fig. 1 a first schematic representation of a device for the film transfer to an impression cylinder,
• Fig. 2 a second schematic representation of a device for the film transfer to an impression cylinder,
• Fig. 3 a representation of a first machine with a Foüentransfereinrichtung, and
• Fig. 4 a representation of a second machine with a film transfer device,
• Fig. 5 an approximately tangential film guide according to Fig. 3 .
• Fig. 6 an approximately tangential film guide according to Fig. 4 ,

In FIG. 1 there is shown an integrated film transfer module F for film transfer for use in a sheet processing machine, such as a printing press.

• Zum Transport von Druckbogen ist ein bogenführender Gegendruckzylinder 4 vorgesehen. Der Gegendruckzylinder 4 kann zum Transport von Druckbogen ein oder mehrere Greiferfelder mit zugehörigen Druckflächen und einen entsprechend ein- bis mehrfachen Umfang auf weisen.
• Dem Gegendruckzylinder 4 ist im Quadranten A ein Auftragwerk 1 zugeordnet. Das Auftragwerk 1 weist einen Formzylinder 11, eine Auftragwalze 12 und ein Dosiersystem 13 auf. Mittels des Auftragwerkes 1 können über eine auf dem Formzylinder 11 aufgespannte Druckform bildmässige Beschichtungen auf am Gegendruckzylinder 4 gehaltene Druckbogen aufgebracht werden.
• Dem Gegendruckzylinder 4 ist im Quadranten B ein Beschichtungswerk 2 zugeordnet. Das Beschichtungswerk 2 dient dem Folientransferdruck und weist einen Transferzylinder 21 auf, der mit dem Gegendruckzylinder 4 einen Transferspalt 6 bildet. Weiterhin sind eine Folienvorratsrolle 22, eine Foliensammelrolle 23 und ggf. Bahnführungen für eine um den Transferzylinder 21 geführte Folienbahn 24 aus Transferfolie vorgesehen. Die Zylinder können dem Formzylinder und dem Gegendruckzylinder eines Beschichtungsmodules einer Offsetdruckmaschine entsprechen.
• Dem Gegendruckzylinder 4 kann in Drehrichtung dem Beschichtungswerk 2 nachgeordnet noch ein Kalandrierwerk 3 zugeordnet sein. Das Kalandrierwerk 3 bildet im Wesentlichen mittels einer Kalanderwalze 31 zusammen mit dem Gegendruckzylinder 4 einen Kalandrierspalt 32.

The film transfer module F is equipped as follows:

• For transporting printed sheets, a sheet-guiding impression cylinder 4 is provided. The counter-pressure cylinder 4 can be used for transporting printed sheets one or more gripper fields with associated pressure surfaces and a corresponding one to multiple extent have.
• The impression cylinder 4 is assigned in the quadrant A an applicator 1. The applicator 1 has a forme cylinder 11, an applicator roller 12 and a metering system 13. By means of the applicator 1 can be applied to a pressure on the form cylinder 11 spanned form coatings on the impression cylinder 4 held sheet.
• The impression cylinder 4 is assigned a coating unit 2 in the quadrant B. The coating unit 2 is used for the film transfer printing and has a transfer cylinder 21 which forms a transfer nip 6 with the impression cylinder 4. Furthermore, a film supply roll 22, a film collection roll 23 and possibly web guides are provided for a guided around the transfer cylinder 21 film web 24 of transfer film. The cylinders may correspond to the forme cylinder and the impression cylinder of a coating module of an offset printing press.
• The counter-pressure cylinder 4 can be assigned downstream of the coating unit 2 still a calender 3 in the direction of rotation. The calendering unit 3 essentially forms a calendering nip 32 together with the impression cylinder 4 by means of a calendering roller 31.

• Ein zu beschichtender Druckbogen wird zunächst in der ersten Arbeitsstation (Auftragwerk 1) in einem Druckspalt 5 zwischen einem Formzylinder 21 und dem Gegendruckzylinder 4 mittels einer Druckform mit einem bildgebenden Klebstoffmuster versehen.
• Danach wird der Druckbogen in der folgenden Arbeitsstation (Beschichtungswerk 2) gemeinsam mit einer Folienbahn 24 aus Transferfolie durch einen Transferspalt 6 zwischen einem als Transferzylinder 21 ausgerüsteten Zylinder und dem gleichen Gegendruckzylinder 4 geführt, wobei die Transferfolie im Transferspalt 6 gegen den Druckbogen gepresst wird. Durch die Anpressung wird im Bereich des Klebstoffmusters von der Transferfolie eine bildgebende Schicht auf den Druckbogen übertragen. Die Folienbahn 24 wird hierbei in Richtung der Drehbewegung des Gegendruckzylinders 4 von der Folienvorratsrolle 22 abgerollt, um den Transferzylinder 21 herumgeführt und auf die Foliensammelrolle 23 aufgerollt.
• Weiterhin kann in dem Kalandrierspalt 32 des nachgeschalteten Kalandrier-werke 3 die von der Transferfolie auf den Druckbogen übertragene bildgebende Schicht zur Erhöhung der Haftfestigkeit und Glätte eingewalzt werden.

In this way, an integrated film transfer module F is formed, which has two workstations, which are used for the following steps:

• A sheet to be coated is first provided in the first work station (applicator 1) in a printing nip 5 between a forme cylinder 21 and the impression cylinder 4 by means of a printing plate with an imaging adhesive pattern.
• Thereafter, the sheet is in the following workstation (coating unit 2) together with a film web 24 of transfer film by a Transfer gap 6 is guided between a cylinder equipped as a transfer cylinder 21 and the same impression cylinder 4, wherein the transfer film is pressed in the transfer nip 6 against the sheet. As a result of the contact pressure, an image-forming layer is transferred to the printed sheet in the region of the adhesive pattern by the transfer film. The film web 24 is thereby unrolled in the direction of the rotational movement of the impression cylinder 4 of the film supply roll 22, guided around the transfer cylinder 21 and rolled up on the film collection roll 23.
• Furthermore, in the calendering nip 32 of the downstream calendering works 3, the imaging layer transferred from the transfer film to the printing sheet can be rolled to increase the adhesive strength and smoothness.

Such a device can be used in a paint module L of a sheet-fed printing machine. Such a paint module L has in its basic design a sheet-guiding impression cylinder 4, a forme cylinder 11, an applicator roller 12, e.g. an anilox roller, and a metering system 13, e.g. a chambered doctor blade system, on. For the mentioned application, the chamber doctor blade system can be used instead of supplying adhesive coating paint via the anilox roller and the forme cylinder, e.g. be used by means of a recessed blanket or a flexographic printing on the substrate.

The design of the paint module corresponds to the basic concept of a printing unit D of a printing press and has instead of the blanket and blanket cylinder only a forme cylinder 11. In addition, in a paint module L no inking unit with a large number of rollers and no dampening unit is available. This has the consequence that a paint module L above the coating devices has free space. The paint module L therefore allows in a very simple, compact, easy-to-use and cost-effective way, the integration of the necessary elements for the film guide.
The printing material is in a so carried out film transfer module F beyond in a very advantageous manner by all the necessary cleavage sites in one guided single gripper closure, while it rests on a single impression cylinder 4.

In FIG. 2 A second embodiment of an integrated film transfer module F for film transfer for use in a sheet-processing machine, such as a printing press, is shown.

• Zum Transport von Druckbogen ist ein bogenführender Gegendruckzylinder 4 vorgesehen. Der Gegendruckzylinder 4 kann zum Transport von Druckbogen ein oder mehrere Greiferfelder mit zugehörigen Druckflächen und einen entsprechend ein- bis mehrfachen Umfang auf weisen.
• Dem Gegendruckzylinder 4 ist im Quadranten A ein Beschichtungswerk 2 zugeordnet. Das Beschichtungswerk 2 dient dem Folientransferdruck und weist einen Transferzylinder 21 auf, der mit dem Gegendruckzylinder 4 einen Transferspalt 6 bildet. Weiterhin sind eine Folienvorratsrolle 22, eine Foliensammelrolle 23 und ggf. Bahnführungen für eine um den Transferzylinder 21 geführte Folienbahn 24 aus Transferfolie vorgesehen. Der Transferzylinder 21 kann dem Formzylinder und der Gegendruckzylinder 4 dem Gegendruckzylinder eines Beschichtungsmodules z.B. eines Lackmodules einer Offsetdruckmaschine entsprechen.
• Dem Gegendruckzylinder 4 ist im Quadranten B in Drehrichtung dem Beschichtungswerk 2 nachgeordnet ein Kalandrierwerk 3 zugeordnet. Das Kalandrierwerk 3 bildet im Wesentlichen mittels einer Kalanderwalze 31 zusammen mit dem Gegendruckzylinder 4 einen Pressspalt 32.

The film transfer module F is equipped as follows:

• For transporting printed sheets, a sheet-guiding impression cylinder 4 is provided. The impression cylinder 4 can have one or more gripper fields with associated pressure surfaces and a corresponding one to multiple extent for the transport of printed sheets.
• The impression cylinder 4 is assigned a coating unit 2 in the quadrant A. The coating unit 2 is used for the film transfer printing and has a transfer cylinder 21 which forms a transfer nip 6 with the impression cylinder 4. Furthermore, a film supply roll 22, a film collection roll 23 and possibly web guides are provided for a guided around the transfer cylinder 21 film web 24 of transfer film. The transfer cylinder 21 may correspond to the forme cylinder and the counter-pressure cylinder 4 to the impression cylinder of a coating module, for example a paint module of an offset printing press.
• The impression cylinder 4 is in the quadrant B in the direction of rotation of the coating unit 2 downstream assigned a calender 3. The calendering unit 3 essentially forms a press nip 32 together with the impression cylinder 4 by means of a calender roll 31.

• Ein zu beschichtender Druckbogen wird zunächst in einer dem Folientransfermodul vorgeordneten separaten Arbeitsstation mittels einer Druckform mit einem bildgebenden Klebstoffmuster versehen. Die Erzeugung des Klebstoffmusters kann in einem Beschichtungsmodul z.B. im Hochdruck- oder Flexodruckverfahren erfolgen oder sie kann in einem Offsetdruckwerk mittels des Flachdruckverfahrens erfolgen.
• Danach wird der Druckbogen in dem Folientransfermodul in der ersten Arbeitsstation (Beschichtungswerk 2) gemeinsam mit einer um den Transferzylinder 21 gelegten Folienbahn 24 aus Transferfolie durch den Transferspalt 6 zwischen dem Transferzylinder 21 und dem Gegendruckzylinder 4 geführt. Durch die Anpressung wird von der Transferfolie die bildgebende Schicht auf das Klebstoffmuster des Druckbogens übertragen. Die Folienbahn 24 wird dabei von der Folienvorratsrolle 22 ab- und auf die Foliensammelrolle 23 aufgerollt.
• Danach kann in der weiteren Arbeitsstation im Pressspalt 32 des nachgeschalteten Kalandrierwerkes 3 die von der Transferfolie auf den Druckbogen übertragene bildgebende Schicht zur Erhöhung der Haftfestigkeit und Glätte eingewalzt werden.

In this way, a film transfer module is formed, which has two workstations for the following work steps:

• A sheet to be coated is first provided in a separate work station upstream of the film transfer module by means of a printing form with an imaging adhesive pattern. The generation of the adhesive pattern can take place in a coating module, for example in a high-pressure or flexographic printing process, or it can take place in an offset printing unit by means of the planographic printing process.
• Thereafter, the printed sheet in the film transfer module in the first work station (coating unit 2) is guided, together with a film web 24 of transfer film placed around the transfer cylinder 21, through the transfer nip 6 between the transfer cylinder 21 and the impression cylinder 4. As a result of the contact pressure, the transfer film transfers the imaging layer to the adhesive pattern of the printed sheet. The film web 24 is thereby removed from the film supply roll 22 and rolled up on the film collection roll 23.
• Thereafter, in the further work station in the press nip 32 of the downstream calendering unit 3, the imaging layer transferred from the transfer film to the printing sheet can be rolled to increase the adhesive strength and smoothness.

The embodiment described may be used in sheet-fed printing presses, for example with configurations according to FIG. 3 respectively. FIG. 4 be used as follows:

The film transfer module F, which always serves here as a coating unit 2 for film transfer, is a printing unit D (see FIG. 3 ) or a paint module L (see Figure 4) in the conveying direction directly upstream. For example, a machine configuration in the form of a so-called double-coating machine can be used (see FIG. 4 ).

Sheet-fed printing press according to FIG. 3:

In the embodiment of a sheet-processing machine according to FIG. 3 can the film transfer module F a printing unit D, for example, an offset printing, be directly upstream.

The printing unit D has a planographic printing plate on a plate cylinder, a blanket cylinder and an impression cylinder 4 and acts as applicator 1. The adhesive is applied conventionally in the offset printing process by means of the according to the desired coating imaged lithographic printing plate. The adhesive is applied in a printing nip 5 of the printing unit D.
Alternatively, for the application of the high-pressure process during adhesive application in the printing unit D, the plate cylinder can be separated from the blanket cylinder. The blanket cylinder carries a recessed blanket or a flexographic printing plate. The blanket cylinder is an applicator roll with dosing (eg at the installation of a blanket washing device), preferably an anilox roller with chamber doctor blade system, assigned to the adhesive and on and off adjustable.

Sheet-fed printing press according to FIG. 4:

In a modified design is after FIG. 4 the film transfer module F a paint module L directly upstream. This in turn a printing unit D can be arranged directly upstream.

On the form cylinder 11 of the film transfer module F upstream paint module L a recessed blanket or a flexographic printing plate is fixed. The paint module functions in this embodiment as applicator 1 for adhesive. A chamber doctor blade system as metering system 13 thus serves to meter the adhesive via a screen or applicator roller 13 and the forme cylinder 11 on the printing material. The printing material with adhesive application is fed to the downstream coating module in the form of the film transfer module F.

If a paint module L is converted to a film transfer module F, then in this the anilox roller and the chamber doctor blade system are removed. The forme cylinder serves as a transfer cylinder 21 for transfer film. For this purpose, the form cylinder at least the film supply roll 22 for fresh transfer film and the film collection roll 23 for spent transfer film assigned. In the transfer nip 6, the transfer cylinder 21 transfers the image-forming layer from the transfer film to the printing material fixed in the gripper closure on the impression cylinder 4.

If necessary, the transfer cylinder 21 on the impression cylinder 4 in the conveying direction downstream of a calender roll 31 (here calender 3).

For special applications, e.g. if the printing material is very absorbent and the adhesive quickly strikes off the printing substrate, a first layer of adhesive can be applied virtually as a basecoat in a printing unit D upstream of the paint module L.

In the embodiments according to FIG. 3 and FIG. 4 For example, one or more UV dryers 7 can be used to use adhesive which dries under the action of UV radiation. The UV driers 7 can each be assigned to a counter-pressure cylinder 4 after a printing nip 5 or after the transfer nip 6.

Drying can also take place in the area of the sheet delivery.

Advantageously, again in this embodiment of the film transfer module F, the printing material is guided in all nip positions in a single gripper closure on a single impression cylinder 4.

Details of the transfer film are disclosed below: The aforementioned transfer film has a multilayer structure. As a carrier layer, it has a film which is preferably thin and tear-resistant. On the carrier film, an imaging layer is applied by means of a release layer. The separating layer serves to facilitate lifting of the imaging layer from the carrier film. The image-forming layer may be, for example, a metallized layer or a glossy layer or a texture layer or a colored layer or a pattern-containing layer.

The transfer film is used in so-called stamping foil printing. In embossing foil printing, an adhesive imaging pattern is applied to a signature. This can be done in a simple manner in the offset printing process. Thereafter, the transfer film with the coated side is placed under pressure on the printing sheet, so that the image-forming layers of the transfer film adhere to the printing sheet as a corresponding image pattern and thereby lifted off the transfer film.

In the described devices for carrying out the embossing foil printing, the film supply roll 22 is assigned to the respective coating unit 2 on the side of the sheet feed. The film supply roll 22 has a rotary drive. The rotary drive is required for the continuous controlled feeding of the unused film web 24 of the transfer film to the coating unit 2 and is therefore controllable. On the downstream side of the coating unit 2, the used film web 24 is wound on a film collecting roll 23. Again, a drive is provided for the optimized production, which is controllable. Furthermore, tension rollers 25 may be provided in the region of the film guide. The tension rollers 25 are arranged adjacent to the transfer cylinder 21 with respect to the supply and removal of the film web 24 to and from the transfer nip 6. By means of such tension rollers 25, the film web 24 is always held in the same voltage relative to the transfer cylinder 21.

In the embodiments according to the Figures 5 and 6 the film guide is carried out in a special way, in which the tension rollers 25 are also arranged adjacent to the transfer cylinder 21.

But are preferred after Figures 5 and 6 the tension rollers 25 in the vicinity of the transfer nip 6 are arranged such that the film web 24 is guided approximately tangentially to the surface of the transfer cylinder 21 in the transfer nip 6. The thus tangential guidance of the film web 24 reduces the friction conditions between the film web 24 and the transfer cylinder 21 by a far-reaching minimization of the contact surface between the film web 24 and the surface This is advantageous if the film web 24 is preferably transportable in the conveying direction in the cyclic operation, for example, taking into account the channel passage (transfer cylinder 21) or taking into account the subject.
In a clocked promotion of the film web 24, this is preferably always stopped when no coating is to be made or when a channel passage of the transfer gap 6 cooperating cylinder takes place with interruption of the transfer effect between the surfaces. In this case, a relative movement between the film web 24 and the surface of the transfer cylinder 21 is mandatory.

In a further embodiment, a plurality of film webs 24 in the axial direction can be arranged in parallel with one another over the format width in conjunction with corresponding film supply rolls 22 and associated film collection rolls 23. These film supply rolls 22 and film collection rolls 23 may optionally be operated jointly or in pairs for each of the plurality of film webs 24 individually in the cyclic operation.
The cyclic operation of the film web 24 preferably takes place via the drivable film supply rolls 22 and film collecting rolls 23, which are coupled, for example, with a machine control. For the cycle operation, a film storage device known per se is provided in the form of a film loop. The film loop can be formed for example by means of the looping of a dancer roller.

The surface of the transfer cylinder 21 is covered with a plastic coating comparable to a blanket or blanket. The plastic coating has a defined elasticity. In addition, the surface of the plastic coating is very smooth and has low adhesion to the transfer film. By means of the plastic surface, a clean transfer of the imaging layer is made possible on the sheet. Furthermore, a comparatively wide pressure gap is produced by the elastic structure of the plastic coating. Furthermore, a further enlargement of the transfer nip 6 is generated by, for example, compared to the transfer cylinder 21 double the diameter of the impression cylinder 4. Through all these measures, on the one hand, a broad Pressure surface in the transfer nip 6 and on the other hand a secure mobility between the pressing the transfer film surface of the transfer cylinder 21 and the impression cylinder 4 allows. With these agents, the transfer of very fine patterns from the imaging layer to the printed sheet is ensured.

In addition to the device features described, the film transfer module may, if desired, include a further processing unit, e.g. for embossing, cutting or punching, or a coating unit for surface refinement of the substrates or an imprinting be subordinated.

After transfer of the transfer film to the substrate and, if necessary, subsequent pressing and smoothing is on the substrate on the substrate impression or imprint with conventional offset ink, alternatively with so-called UV color, and / or a coating of the imaging coating of the Transfer film, for example, a UV coating in conjunction with an excimer drying feasible.

For this purpose, at least one further printing unit and / or at least one paint module is arranged downstream of the film transfer module. For example, with an additional coating of the imaging coating of the transfer film, a further increase in gloss can be achieved.

The invention is ausgestaltbar in the context of the illustrated embodiments and should not be limited to the specific features of the embodiments.

LIST OF REFERENCE NUMBERS

1

- Contractor

2

- Coating plant

3

- Calendering plant

4

- impression cylinder

5

- pressure gap

6

- Transfer gap

7

- UV dryer

11

- Forme cylinder

12

- applicator roller

13

- Dosing system

21

- transfer cylinder

22

- Film supply roll

23

- foil collecting roll

24

- film web

25

- Tension pulley

31

- calender roll

32

- calendering nip

A

- Quadrant

B

- Quadrant

F

- Film transfer module

D

- Printing unit

L

- Paint module

Claims (13)

1. A sheet processing printing machine with at least one varnish module and a device for embossed foil printing on to printing sheets having at least one application couple (1) for the image-like coating of a printing sheet (B) with an adhesive and with a coating couple (2, F) for the transfer of imaging layers from a transfer foil (5) on to the printing sheet (B), wherein the coating couple (2, F) includes an impression cylinder (4) and a transfer cylinder (21) which form a common transfer nip (6) and the transfer foil (5) is guidable about the transfer cylinder (21) in such a manner that jointly with the printing sheet (B) guided on the impression cylinder (4) it is guided under pressure through the transfer nip (6) and wherein the imaging layers following the emergence of the printing sheet (B) from the transfer nip (6) in the region of the image-like regions provided with adhesive adheres to the printing sheet (B) and is lifted off the transfer foil (5), wherein the device is arranged within the printing machine, characterized in that a foil transfer module (F) is directly arranged downstream of a printing couple (D) or varnish module (L) of the printing machine, in that the foil transfer module (F) is at least designed as coating couple (2) having a transfer cylinder (21) and an impression cylinder (4), in that the transfer cylinder (21) within the foil transfer module (F) is assigned a foil storage reel (22) for fresh transfer foil and a foil collection reel (23) for consumed transfer foil in such a manner that the transfer foil as foil web (24) can be guided from the foil storage reel (22) about the transfer cylinder (21) through the transfer nip (6) to the foil collection reel (23), and in that the transfer cylinder (21) is a form cylinder of a varnish module (L) or in that the transfer cylinder (21) is arranged downstream of the form cylinder on the impression cylinder (4) of the varnish module (L).
2. The printing machine according to Claim 1, characterized in that in the foil transfer module (F) an application roller and a metering system removable from the form cylinder are arranged and in that the form cylinder can be converted into the transfer cylinder (21) by means of a smooth compressible press cover.
3. The printing machine according to Claim 2, characterized in that the press cover as surface element covering a part area of the cylindrical surface region of the transfer cylinder (21) of the coating couple (2) can be attached in a positionable manner to the transfer cylinder (21) or a clothing carried by the transfer cylinder (21).
4. The printing machine according to Claim 2, characterized in that on the surface of the transfer cylinder (21) a cut-out printing blanket or a plastic printing form processed in accordance with a pressing surface contoured according to the area to be coated or a pressing-on segment contoured in accordance with the region to be coated that can be glued on or otherwise attached preferably in a releasable manner is provided
5. The printing machine according to Claim 1 to 4, characterized in that within the sheet processing machine receiving the coating couple the coating couple can be placed in any positions of the machine.
6. The printing machine according to Claim 1 to 4, characterized in that the sheet processing machine is a printing machine with a plurality of printing couples and in that the coating couple is arranged before or after or in-between the printing couples.
7. The printing machine according to Claim 1 to 6, characterized in that the coating couple (2) is designed as foil transfer module (F) in the manner of a portable unit.
8. The printing machine according to Claim 1 to 7, characterized in that a plurality of coating couples (2) are arranged one after the other within a sheet-processing machine.
9. The printing machine according to Claim 1 to 8, characterized in that an application couple (1) in form of a printing couple (T) is directly arranged in front of a coating couple (2).
10. The printing machine according to Claim 1 to 9, characterized in that an application couple (1) in form of a varnish module (L) is directly arranged in front of a coating couple (2).
11. The printing machine according to Claim 1 to 9, characterized in that an application couple (1) in form of a varnish module (L) and an application couple (1) in form of a printing couple (D) are directly arranged in front of a coating couple (2).
12. The printing machine according to Claim 1, characterized in that tensioning rollers (25) for approximately tangential guiding of the foil web (24) in the transfer nip (6) are assigned to the transfer cylinder (21).
13. The printing machine according to Claim 12, characterized in that the foil web (24) is transportable in delivery direction in clocking mode.

Images