EP1700696A2 - Embossing device with foil handling in a sheet printing press - Google Patents

Abstract

The printing process use a transfer foil carrier [5] that is fed between reels [8,9] and passes between a power cylinder [3] and a counter cylinder [4]. The transfer image is transferred onto sheets of paper. The process is aided by the application of heat from multiple heat sources, eg intra red elements [21].

Description

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.

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, wherein printing units and a coating module are arranged between the two units. 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 module with a counter-pressure cylinder and a press roller, a film guide is provided. This is designed in such a way that a film strip or a transfer film is guided through the transfer nip of the coating module between the impression cylinder and the press roll from a film supply roll. The film strip is rewound on the outlet side after leaving the coating module. 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 module, being brought by means of the press roller on the impression cylinder resting sheet with the film material in combination. 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 modules, for example in printing units of printing presses. A disadvantage of the known devices is that they are not flexible and that the supply of the transfer film is complicated and difficult to handle. In particular, very special films are required which have precisely specified release properties of the imaging layer.

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.

The solution to this problem results in a method according to the features of claim 1 and in a device according to the features of claim 3.

Advantageously, a feed device is used to guide the transfer film, in which the transfer film can be heated during supply to the transfer nip.

• Auf diese Weise ist die Ablösung der bildgebenden Schicht von der Trägerfolie verbessert und der Beschichtungsprozess in besonders vorteilhafter Weise beeinflußbar.

The heating can take place by means of radiation, air flows or contact with tempering devices:

• In this way, the detachment of the imaging layer from the carrier film is improved and the coating process can be influenced in a particularly advantageous manner.

An associated device for feeding the transfer film advantageously has a guide device in the manner of a cassette module, by means of which the supply to the transfer nip and the removal from the transfer nip are made possible in a simple manner.

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.
To ensure the efficiency of the coating process can be provided to control the film feed such that the transfer film is then stopped when no transmission of the imaging or metallization takes place.
Advantageously, a control of the transfer film can be carried out such that, when passing through a cylinder channel receiving the grippers of the sheet-guiding impression cylinder, the film feed is stopped, wherein the press roll then passes in a sliding manner under the transfer film.

To improve the gloss effect, the image-forming layer can be applied by means of so-called UV negative-pressure ink. The UV negative pressure ink is applied by means of the printing unit for the adhesive in a corresponding manner via an offset printing plate.

Advantageously, it is also possible to provide a plurality of coating modules behind one another within a sheet-processing machine. In this way, 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 transmit the imaging layers next to one another using a single adhesive pattern with all image-pattern elements. It is also possible to provide a first adhesive pattern in a first coating module with a first image-forming coating or metallization layer and superposed in the following to apply another, the first enclosing adhesive pattern and provided with a different imaging coating or metallization layer.

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

Figur 1

eine grundsätzliche Darstellung einer Druckmaschine mit einer Folientransfereinrichtung und

Figur 2

den Aufbau eines Beschichtungsmodules mit einer Folientransfereinrichtung.

Showing:

FIG. 1

a basic illustration of a printing machine with a film transfer device and

FIG. 2

the construction of a coating module with a film transfer device.

• Ein zu beschichtender Druckbogen wird in einem ersten Arbeitschritt mit einem bildgebenden Klebstoffmuster versehen. Der Auftrag des Klebers erfolgt im einer als Auftragwerk 1 konfigurierten Vorrichtung, z.B. einem konventionellen Druckwerk einer Offsetdruckmaschine über dort vorhandene Farb- und Feuchtwerke 11, eine Druckplatte auf einem Plattenzylinder 12, einen Drucktuch- oder Gummizylinder 13 und einen Gegendruckzylinder 4. Alternativ kann zu dem gleichen Einsatzzweck in entsprechender Anordnung auch ein Lackmodul einer Bogendruckmaschine Verwendung finden.
• Danach wird in einem zweiten Schritt gemeinsam mit einem Druckbogen eine Transferfolie 5 durch einen Transferspalt 6 geführt, wobei die Transferfolie 5 im Transferspalt 6 gegen den Druckbogen gepresst wird. Hierzu wird ein Beschichtungsmodul 2 verwendet, das einem Druckwerk oder einem Lackmodul oder einer Basiseinheit oder einer andersartigen Verarbeitungsstation einer Bogenoffsetdruckmaschine entsprechen kann.
• Der Transferspalt 6 im Beschichtungsmodul 2 wird durch eine Presswalze 3 und einen Gegendruckzylinder 4 gebildet.
  Hierbei kann die Presswalze 3 einem Drucktuchzylinder und der Gegendruckzylinder 4 einem Gegendruckzylinder eines an sich bekannten Offsetdruckwerkes entsprechen. Weiterhin kann die Presswalze 3 einem Formzylinder und der Gegendruckzylinder 4 einem Gegendruckzylinder eines Lackmodules einer Bogendruckmaschine entsprechen.
• Weiterhin kann dem Beschichtungsmodul 2 nachgeschaltet ein so genanntes Kalandrierwerk vorgesehen werden, wenn der beschichtete Druckbogen zur Steigerung der Haftung der Beschichtung bzw. zur Steigerung von Glätte und Glanz des Druckbogen unter erhöhtem Druck überwalzt werden soll. Dies ist aber nur bei geeigneten Materialien sinnvoll.

FIG. 1 shows a sheet-processing machine, here a printing press, which consists of at least two printing units. The two printing units are used for the following purposes:

• A sheet to be coated is provided in a first step with an adhesive imaging pattern. The application of the adhesive takes place in a configured as an applicator 1 device, such as a conventional printing unit of an offset printing press on there existing inking and dampening 11, a printing plate on a plate cylinder 12, a blanket or blanket cylinder 13 and a counter-pressure cylinder 4. Alternatively, to the same purpose in an appropriate arrangement also find a paint module of a sheetfed press use.
• Thereafter, in a second step, together with a printing sheet, a transfer film 5 is guided through a transfer nip 6, wherein the transfer film 5 is pressed in the transfer nip 6 against the printing sheet. For this purpose, a coating module 2 is used which can correspond to a printing unit or a lacquer module or a base unit or another type of processing station of a sheet-fed offset printing press.
• The transfer nip 6 in the coating module 2 is formed by a press roll 3 and an impression cylinder 4.
  Here, the press roller 3 a blanket cylinder and the impression cylinder 4 correspond to a counter-pressure cylinder of a known offset printing unit. Furthermore, the press roller 3 a form cylinder and the impression cylinder 4 correspond to a counter-pressure cylinder of a paint module of a sheet-fed press.
• Furthermore, the coating module 2 downstream of a so-called calendering be provided when the coated sheet to increase the adhesion of the coating or to increase the smoothness and gloss of the sheet is to be rolled under increased pressure. However, this only makes sense with suitable materials.

Within the coating module 2 used for the film transfer, a web guide for transfer films 5 is shown.
For processing in question transfer sheets 5 are constructed in multiple layers. They have a carrier layer on which 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 layer. 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 layer containing one or more image patterns.

The film supply roll 8 is assigned to the coating module 2 on the sheet feed side. 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 5 to the coating module 2 and is therefore controllable.
Furthermore, in the field of film feed and removal guide devices 14, such as deflection or tension rollers, pneumatically actuated conducting means, baffles, planar guide channels o. Ä. Provided. Thus, the film web of the transfer film 5 is always guided without distortions flat and opposite in the same voltage the press roller 3 are held. The guide devices 14 may also contain aids for introducing the transfer film 5. In this case, automatic retraction aids for the film web of the transfer film 5 can be used.
In this way, the film feed in the area of the coating module 2 surrounding Verschutzungen 15 is simplified. The protective function of the Verschutzungen 15 is maintained at the same time completely.

In this case, the transfer film 5 can be guided around the press roll 3, wherein the transfer film 5 can be fed and discharged in an advantageous manner from one side of the coating module 2 to the press nip 6. In a further embodiment, the transfer film 5 can also be fed in and out substantially tangentially on the press roll 3 or wrap it around the press nip 6 only in a small circumferential angle. For this purpose, the transfer film 5 is supplied from one side of the coating module 2 and discharged to the opposite side of the coating module 2.

On the downstream side of the printing unit, a film collection roller 9 is shown. On the film collecting roll 9, the used film material is wound up again. Again, a rotary drive 7 is provided for the optimized production, which is controllable. In essence, the transfer film 5 could also be moved by the rotary drive 7 on the discharge side and kept taut on the inlet side by means of a brake.

For the transfer process of the imaging eg wear layer of the transfer sheet 5 on the sheet in the transfer nip 6 between the press roll 3 and the impression cylinder 4 is essential that the surface of the press roll 3 so the blanket cylinder or forme cylinder is equipped by means of a compressible, damping element.
The press roll 3 is therefore provided with a press fabric 10 or as a roll with a corresponding coating. The press fabric 10 or press coating can be performed, for example, as a plastic coating, comparable to a blanket or blanket. The surface of the press cover 10 or press coating is preferably very smooth. It can also be formed from antiadhesive substances or structures. Here, for example, a relatively hard structure in the form of very fine spherical caps comes into question. A press fabric 10 is held on the press roll 3 in a cylinder channel on jigs.
The press fabric 10 may be equipped to improve the transmission properties in the transfer nip 6 with a targeted elasticity. This may optionally act in a compressible intermediate layer. This compressibility is preferably similar or less than in conventional blankets or Drucktüchem that can be used at this point.
The mentioned compressibility can be produced by means of a conventional compressible printing blanket. Furthermore, combined fabrics made of a hard blanket and a soft pad can be used.
Furthermore, a limited pressing surface can be provided directly on the press roll 3 or on the press fabric 10. This can be worked out of the surface of the press fabric 10 or it can be additionally attached as a partial surface of the material of the press fabric 10 on the press roller 3.

To ensure the cost-effectiveness of the coating process, it is provided that the film advance of the transfer film 5 from the film supply roll 8 to the transfer nip 6 and the film collection roll 9 is controllable so that as far as possible the transfer film 5 is stopped when no transfer of the imaging layer should take place :
For this purpose, a control of the transfer film 5 can be made such that the film feed is stopped when passing through a gripper of the sheet-guiding counter-pressure cylinder 4 receiving cylinder channel. The grippers hold the printed sheet on the impression cylinder 4. The press roll 3 has a corresponding cylinder channel, in which the fabric is held. In the region of the corresponding cylinder channels no pressing of the transfer film 5 takes place between the press roll 3 (blanket cylinder) and the impression cylinder 4. The press roll 3 then slidably passes under the transfer film 5, while the transfer film 5 is tensioned freely between the press roll 3 and impression cylinder 4. This condition continues until at the so-called pressure beginning of the cylinder channel ends and the transfer sheet 5 is again clamped between the press roller 3 and the impression cylinder 4, including a sheet. Then, the transfer sheet 5 is further transported. The timing of the film feed can begin or suspend slightly earlier than pretend the channel edges of the cylinder channel according to a necessary acceleration or braking of the film supply roll 8 or film collecting 9. In response-fast timing systems via so-called dancer rollers 18, as they are shown by way of example in FIG. 1, the control of the rotary drives 7 of the film supply rolls 8 or film collection roll 9 may not be necessary. By means of the dancer rollers 18, the necessary film tension is also maintained.

A further improvement of the film utilization of the type described results from the fact that the transfer film 5 is divided into one or more Teilfolienbahnen lesser width. Thus, with appropriate control by means of the device or devices for timing the film feed each of the sub-film webs, the utilization of the transfer film 5 can be improved even in zonally different lengths coating areas within a sheet. For this purpose, each partial film web is conveyed only exactly in the area where the imaging surface layer is to be applied. In the areas not to be coated, each partial film web can be stopped independently of the other partial film webs, whereby no unnecessary film consumption arises.

Furthermore, to improve the coating process provided in the area of the adhesive application and in the area of the film order dryer 16 provided. Thus, in particular by means of UV drying, the imagewise applied adhesive layer can be predried by means of a first dryer 16 (intermediate dryer I) so that the wear layer of the transfer film 5 adheres better. Furthermore, the adhesive effect of the applied wear layer on the printed sheet can be improved by the action of a second dryer 16 (intermediate dryer II) by additionally accelerating the drying of the adhesive.

Finally, the quality of the coating by means of an inspection or Monitoring device 17 are checked after the foil application. For this purpose, the inspection device 17 is directed to a sheet-guiding surface of the coating module 2 after the transfer nip 6 and optionally sealed off from the dryer 16 or on a sheet-guiding surface of the coating module 2 downstream further sheet leading module. The pre-applied coated printing sheet can thus be checked for completeness and quality of the coating. As poorly recognized printed sheets can be marked or rejected in a sorter as waste.

With the aid of the device described, it is also possible to transfer pretreated transfer films or layers from a transfer film to a printed sheet in a working process preceding the coating process.

If the film roll 8 is provided with a data memory which is integrated, for example, in the paper tube of the film roll 8, all relevant data for setting the coating module 2 and the sheet-processing machine can be stored in this data memory. The adjustment data or operating parameters or characteristic data of the transfer film 5 can be read out automatically during assembly of the film roll (s) 8. Thus, an automated adjustment or activation of all suitably equipped operations of the coating module 2 and the sheet-processing machine in connection with the coating process using the transfer sheet 5 is possible.
By pre-input via the central control station eg on the machine, the control panel of the coating module 2 or the central work preparation station within the control system, In film roll mounting can be checked whether the film roll 8 is placed in the right place for the print job.

The parameterization of the coating by means of transfer film 5 with regard to its processability also relates to the detachability of the imaging layers from the carrier film. For this purpose, it is provided according to the invention to arrange a film web heating in front of the transfer nip 6 or else in the transfer nip 6 between the press roll 3 and impression cylinder 4 in the coating module 2.

The film web 5 can thus be removed for better release, i. Separating the imaging layer (jewelry foil) are heated by the carrier film.

• eines oder mehrerer Wärmestrahlern 21, z.B. IR-Strahlern, gegenüberliegend der Folienbahn 5,
• einer beheizte Kontaktwalze 20 zum Wärmeeintrag in die Folienbahn 5 über eine vergrößerte Fläche,
• einer Einrichtung zum Anblasen mit temperierter Blasluft (Thermoluft), z.B. mittels eines Luftschwertes oder von Düsen,
• einer Einrichtung zum Einblasen von beheizter Luft in einen Führungskanal (siehe z.B. die Folienleiteinrichtung 14) für die Leitung der Folienbahn 5 zum Transferspalt oder
• einer oder mehrerer beheizbarer Umlenkrollen 19 für die Führung und Lenkung der Folienbahn 5 zum Transferspalt 6 (insbesondere auch annähernd tangential zur Presswalze 3).

For this purpose, a variety of means can be used. Possible is the alternative use of

• one or more heat radiators 21, eg IR radiators, opposite the foil web 5,
• a heated contact roller 20 for heat input into the film web 5 over an enlarged area,
• a device for blowing with tempered blowing air (thermal air), eg by means of an air knife or nozzles,
• a device for blowing heated air into a guide channel (see, for example, the film guide device 14) for the guidance of the film web 5 to the transfer nip or
• one or more heatable deflection rollers 19 for the guidance and guidance of the film web 5 to the transfer nip 6 (in particular also approximately tangential to the press roller 3).

But it is also possible to heat the press roller 3 and / or the impression cylinder 4 or to use a heatable blanket or a heatable press fabric.

The direct foil heating before entering the transfer nip 6 is the cheapest solution in this context. The heating should take place as close to the transfer nip 6, so that the conditioning in the transfer nip 6 is still fully effective.
By means of one or all of the described devices, the transfer film 5 can be influenced in the simplest way so that the transfer of the imaging layer can be controlled at any time and for the most varied types of film with optimum coating quality. This makes it possible to control both the coating or embossing process and, on the other hand, to enable the use of versatile, possibly even cost-effective types of film.

By metrological monitoring, a readjustment of the film heating in the context of changing process parameters and environmental conditions is possible.
Furthermore, depending on a sheet inspection, the film heating can be controlled. Depending on the degree of film heating, the detachment behavior of the imaging layer from the transfer film 5 could change unfavorably. This is possible by means of a suitable and known inspection device 17. The inspection device 17 is connected downstream of the transfer nip 6 in the coating module 2 or in a region leading thereto, and detects defects in the coating in a simple manner.

• Bei einer zu starken Folienerwärmung könnte sich zu viel bildgebende Schicht von der Transferfolie 5 ablösen.
• Bei einer zu schwachen Folienerwärmung könnte sich zu wenig bzw. insbesondere an feinen Bildmusterstellen auch gar keine bildgebende Schicht von der Transferfolie 5 ablösen.
• Die Folienerwärmung kann auch in Bezug auf das Drucksujet partiell zu stark oder zu schwach sein.
• Die Folienerwärmung muß an die Festigkeitsparameter der Trägerfolie angepasst sein.

The following cases are conceivable:

• If the film warms up too much, too much imaging layer could detach from the transfer film 5.
• If the film heating is too weak, too little or, in particular, fine image pattern spots could not even detach any imaging layer from the transfer film 5.
• The film heating may also be partially too strong or too weak with respect to the printed subject.
• The film heating must be adapted to the strength parameters of the carrier film.

These measurement results can be used automatically to readjust the film heating temperature if they are integrated in the control of the coating module in a control loop.

LIST OF REFERENCE NUMBERS

1

commissioned

2

coating module

3

press roll

4

Impression cylinder

5

Transfer foil / foil web

6

transfer nip

7

roller drive

8th

Film supply roll

9

Foil composite role

10

Press covering

11

Inking / dampening unit

12

plate cylinder

13

Blanket / blanket cylinder

14

Folienleiteinrichtung

15

Printing plant security

16

dryer

17

Inspection device / monitoring system

18

dancer roll

19

guide rollers

20

guide roll

Claims (28)

Device for transferring image-forming layers from a carrier film to printing sheets at least with an applicator (1) for imagewise coating a printed sheet with an adhesive and with a coating module (2) for transferring the image-forming layers from the carrier film to the printing sheet, wherein the coating module ( 2) comprises an impression cylinder (4) and a press roll (3), which form a common transfer nip (6), and further wherein the transfer film through the transfer nip (6) is feasible such that it with the coated side on the on the Impression cylinder (4) guided printed sheet placed and under pressure together with the sheet through the transfer nip (6) between the press roller (3) and impression cylinder (4) is guided and wherein the imaging layers after the exit of the sheet from the transfer gap (6) in the area adhered to the adhesive image-wise areas on the sheet and from the Trägerf olie is lifted,
characterized,
that a thermal device to heat interference of the transfer foil (5) during guidance to the transfer gap (6) towards or within the transfer gap (6) is provided. Device according to claim 1,
characterized,
that the device is arranged over the entire surface to the thermal influence acting or zonal effect. Apparatus according to claim 1 or 2,
characterized,
that the device is formed to heat interference from one or more heat lamps (21). Apparatus according to claim 1 or 2,
characterized,
that the device is formed to the thermal influence of one or more heated rollers (19, 20). Device according to claim 4,
characterized,
that the rollers (19, 20) are zonal heated. Apparatus according to claim 1 or 2,
characterized,
that the device for influencing the heat a heat-carrying pneumatic means. Device according to claims 1 to 6,
characterized,
that the device for heat interference part of a sheet guide or Folienleiteinrichtung (14). Apparatus according to claim 1 or 2,
characterized,
in that the device for influencing heat is a heat-transferring coating or a heat-conducting coating of one of the elements (press roller (3), impression cylinder (4), film guide device (14), rollers (19, 20)) which guides the transfer film (5). Device according to claim 7 or 8,
characterized,
in that a film guiding device (14) can be detachably inserted as a structural unit in the manner of a slide-in cassette in the coating module (2) and that heated blowing air can be supplied to the film guiding device (14). Device according to claim 9,
characterized,
in that the guide device has a guide channel for guiding the film web (5) and that blowing air can be conducted into the guide channel by means of a blowing device so that the blowing air sweeps the film web (5). Device according to claim 10,
characterized,
that blowing air can be conducted into the guide channel by means of a blowing device so that the blowing air sweeps the film web (5) flat and can be directed against a printing material guided on the surface of the impression cylinder (4). Device according to claims 1 to 11,
characterized,
that the transfer foil (5) is divided into one or more partial foil webs of narrower width and that the partial foil webs are next to each other supplied to the transfer gap (6) by means of the Folienleiteinrichtung. Apparatus according to claim 1 to 12,
characterized,
in that a pneumatic device in the manner of a pressure cylinder blowing device is used as the device for influencing the heat. Device according to claims 1 to 13,
characterized,
in that one or more sensory devices for detecting the temperature of the heated web of the transfer film (5) are subdivided at one or more positions arranged transversely to their width and that the sub-film webs are fed next to one another to the transfer nip (6) by means of the film guide device. Device for transferring image-forming layers from a carrier film to printing sheets at least with an applicator (1) for imagewise coating a printed sheet with an adhesive and with a coating module (2) for transferring the image-forming layers from the carrier film to the printing sheet, wherein the coating module ( 2) comprises an impression cylinder (4) and a press roll (3), which form a common transfer nip (6), and further wherein the transfer film through the transfer nip (6) is feasible such that it with the coated side on the on the Impression cylinder (4) guided printed sheet placed and under pressure together with the sheet through the transfer nip (6) between the press roller (3) and impression cylinder (4) is guided and wherein the imaging layers after the exit of the sheet from the transfer gap (6) in the area adhered to the adhesive image-wise areas on the sheet and from the Trägerf olie is lifted,
characterized,
that thermal means for heat transfer to the adhesive or the adhesive of the leading or metering devices is provided. Device according to claim 15,
characterized,
in that one or more tempering devices are provided in the applicator unit (1) for influencing the heat of a device storing the adhesive. Device according to claim 15,
characterized,
in that one or more tempering devices are provided in the applicator unit (1) for influencing the heat of a device metering the adhesive. Device according to claim 15,
characterized,
that in the applicator (1) one or more tempering for the heat influence of a glue applying to the substrate means are provided. Device according to claims 15 to 18,
characterized,
in that an ink fountain or a chambered doctor blade and / or a paint reservoir are provided in the applicator unit (1) for storing the adhesive,
that for metering the adhesive, a roll mill or a chamber doctor blade are provided with an anilox roller and
in that a roll unit / inking unit or an anilox roller in conjunction with a blanket cylinder or a lacquered form cylinder are provided for applying the adhesive to the printing material. Device according to claims 15 to 19,
characterized,
that provided in the applicator (1) a Farbwerktemperierung. Device according to claim 15, 16 or 19,
characterized,
in that one or more devices are provided for the preparation and automatic supply of adhesive via a paint supply system to the means for metering or applying the adhesive. A method for imagewise coating a printing sheet with an imaging layer from a transfer film by feeding a film web (5) to a coating module (2) using a device according to one of the preceding claims,
characterized,
is discharged to a sheet (5) from a supply roll (8),
that the film web (5) is fed to a film guiding device,
is complete that the foil web (5) by means of a thermal device, or part of the area heated,
in that the film web (5) in the heated state forms one of a press roll (3) and an impression cylinder (4) of a coating module (2) Transfer gap (6) is supplied,
that an imaging layer is transferred from the transfer sheet (5) in the transfer gap (6) in the region of an imagewise applied adhesive to a printing sheet, detaching from the transfer sheet (5), and
that the foil web (5) led out after emerging from the transfer nip (6) by means of further guide means of the coating module (2) and a take-up roll (9) is supplied. Method according to claim 22,
characterized,
that the achievable by the heating temperature of the transfer film can be controlled (5). A method according to claim 22 or 23,
characterized,
in that the temperature of the transfer film (5) which can be reached by heating is adjustable zonally over the width of the film web (5). Method according to claims 22 to 24,
characterized, - That the quality of the coating on the sheet by means of an inspection device (17) can be detected by measurement and - That the achievable by the heating temperature of the transfer film (5) is adjustable in dependence on the measurement result, - That upon detection of defects in the imaging layer on the sheet, the temperature is increased, and - That upon detection of the decrease to large elements in the imaging layer on the sheet, the temperature is lowered. A method for imagewise coating a printing sheet with an imaging layer from a transfer film by feeding a film web (5) to a coating module (2) using a device according to one of the preceding claims,
characterized,
is discharged to a sheet (5) from a supply roll (8),
that the film web (5) is fed to a film guiding device,
that a printing material is heated by means of a thermal device fully or partially,
that the foil web (5) a is supplied from a press roll (3) and an impression cylinder (4) of a coating module (2) formed transfer gap (6),
that an imaging layer is transferred from the transfer sheet (5) in the region of an imagewise applied adhesive on the printed sheet in the heated state, detaching from the transfer film (5), and
that the foil web (5) led out after emerging from the transfer nip (6) by means of further guide means of the coating module (2) and a take-up roll (9) is supplied. A method for imagewise coating a printing sheet with an imaging layer from a transfer film by feeding a film web (5) to a coating module (2) using a device according to one of the preceding claims,
characterized,
is discharged to a sheet (5) from a supply roll (8),
that the film web (5) is fed to a film guiding device,
that an adhesive in the heated state is applied imagewise to a printing material,
that the foil web (5) a is supplied from a press roll (3) and an impression cylinder (4) of a coating module (2) formed transfer gap (6),
that an imaging layer is transferred to the printed sheet in the heated state with detachment from the transfer film (5) in the transfer nip (6) in the region of heated adhesive applied, and
that the film web (5) after exiting the transfer nip (6) by means of further guide means led out of the coating module (2) and a Winding roller (9) is supplied. Device according to claims 22, 26 and 27,
characterized,
that the adhesive and / or the transfer film (5) and / or the printing material are heated.

Images