DE102011007462A1 - Format-related cold foil stamping - Google Patents

Abstract

The film feed in a coating module for the transfer of imaging layers from a transfer film to a printing material is to be extended in its applicability. For this purpose, a limited pressing surface is arranged in the coating module for transferring layers from the transfer film 5. For a targeted control of the film feed is possible. The transfer film 5 is in this case preferably passed in a limited width and approximately tangentially on a press roller 3. To limit pressing surfaces format pads 30, 31, 32 are provided for the press cover 10.

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 and to a method according to the preamble of claim 13.

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.

From the DE 102009026438 A1 a device for cold foil stamping is known. In this device, 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. For this purpose, a limited pressing surface is arranged in the coating module for transferring layers from the transfer film. For a targeted control of the film feed is possible. In this case, the transfer film is preferably guided past a press roll in a limited width and approximately tangentially. For film storage and film promotion special cyclically operable conveyors are assigned for this purpose. The timing of the film feeding may be carried out with respect to a peripheral interruption of cylinder-knitting surfaces or to transfer film-transfer layer transfer regions which are variable on the circumference or across the width of cylinder-knitting surfaces.

From the DE 102 13 651 A1 For example, there is known a cylinder with a flexible upper lift fastening device in a processing machine. The cylinder 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. Thus, in each case at least one pad shape can be positioned to the upper elevator.

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 can not be used flexibly.

The object of the invention is therefore to provide a device by means of which the transfer of an imaging layer z. As a metallization, on a sheet safely, economically and accurately, the device should be manageable for an extended range of applications. In particular, a partial film application is to be made possible.

The solution of this problem arises according to the invention in a device having the features of claim 1 and in a method according to the features of claim 13.

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. Advantageously, the device is characterized in that a press roll has a pressing surface occupying a partial area of the total area of a printing sheet. Advantageously, such pressing surfaces are designed as below a blanket stretchable segments for the blanket provided on the press roll over the entire surface.

• – Für das Gummituch/die Pressbespannung der Presswalze geeignete so genannte Unterlagebogen oder auch Formatbogen, die sich nur auf die wirksame Fläche für den Folientransfer erstrecken
• – Unterlagebogen/Formatbogen, die gemeinsam mit dem Gummituch/mit der Pressbespannung an der Presswalze aufgespannt werden
• – Unterlagebogen/Formatbogen, die jeweils für sich gespannt und unterhalb des Gummituches/der Pressbespannung an der Presswalze arretiert werden können
• – Auf die Presswalze aufklebbare Unterlagesegmente, die im Wirkbereich auf der Oberfläche der Presswalze positioniert und vom Gummituch überspannt werden

For this purpose, different elevator materials can be used for a press cover. Can be used

• - For the blanket / the press fabric of the press roll suitable so-called underlay sheets or even format sheets, which extend only to the effective area for the film transfer
• - Underlay sheet / size sheet, which are clamped together with the blanket / with the press fabric on the press roll
• - Underlay sheet / format sheet, each of which can be tensioned on its own and locked under the blanket / press fabric to the press roll
• - On the press roll stick-on pad segments, which are positioned in the active area on the surface of the press roll and spanned by the blanket

As a neutral substructure of the corresponding partial press fabric is provided for the entire area of the press roll surface, a pad with or without damping effect such. B. again to use a vacuum blanket that serves the leveling of the total surface, while the format sheets come to rest only in the working area of the film transfer itself.

As clamping systems arise 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. Depending on the structure, the surface of the press cylinder elevator is also suitable for profiled embossing.

This results in an extended range of applications for the process of cold foil stamping. The set-up time reduction is achieved by prepared press cylinder lifts. In addition, register automation can be introduced.

To solve is to add that the press cylinder with a register system z. B. can be executed via Registergins. The press cylinder may continue to be adjustable z. In the form of an automatic printing plate tension register system. In this case, 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. In addition, the press cylinder elevator may be provided with register punches.

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, the 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.

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

Showing:

1 a basic representation of a printing press with a film transfer device,

2 the construction of a coating module with a film transfer device,

3 and 4 the arrangement of a press fabric according to the invention on a press roll,

5a and 5b alternative constructions of press covers,

6 and 7 further press clothing according to the invention on a press roll and

8th another mountable and removable press fabric according to the invention on a press roll.

• – Ein Druckbogen wird zunächst mit einem flächigen oder bildgebenden Klebstoffmuster versehen (Druckwerk als Auftragwerk 1).
• – Im Folgedruckwerk wird der Druckbogen gemeinsam mit einer Transferfolie 5 unter Pressung durch einen Transferspalt 6 geführt, (Beschichtungswerk 2).

1 shows parts of a sheet-fed rotary printing press, which contains two printing units and is used for the following purposes:

• - A printed sheet is first provided with a two-dimensional or imaging adhesive pattern (printing unit as Auftragwerk 1 ).
• - In the following printing unit, the printed sheet is combined with a transfer film 5 under pressure through a transfer nip 6 guided, (coating plant 2 ).

The commissioned work 1 can be a known offset printing unit with an inking unit 11 , a plate cylinder 12 and a blanket cylinder 13 be. The blanket cylinder 13 acts with an impression cylinder 4 together.

The coating plant 2 can also be formed by an offset printing unit. The transfer gap 6 in the coating plant 2 is through a press roll 3 and an impression cylinder 4 educated. The press roll 3 may correspond to the blanket cylinder. The press roll 3 can also correspond to the form cylinder of a paint module. Within the coating plant used for the film transfer 2 is a track guide 14 shown for transfer foils. The transfer foil 5 is protected by protective devices 15 of the coating plant 2 on and executed again.

The foil supply roll 8th is the coating plant 2 assigned on the side of the sheet feeder. The foil supply roll 8th has a rotary drive 7 for continuous controlled feeding of the transfer film to the coating unit 2 on. In the film feeder can deflection or tension rollers for guiding the transfer film 5 in a substantially constant tension against the press roll 3 be provided. On the downstream side of the printing unit is a film collecting roll 9 provided for the used sheet material. A rotary drive 7 at the foil collecting roll 9 is always advantageous. It may even be provided that the transfer film 5 by means of the rotary drive 7 conveyed on the outlet side and held tight on the inlet side by means of a brake.

The press roll 3 (As blanket cylinder or forme cylinder or separate press roller) carries on its surface a compressible or damping, z. B. also provided with a compressible intermediate layer element. The press roll 3 can do this with a press cover 10 be provided, for example, as a plastic coating, comparable to a blanket or blanket, which is held in a cylinder channel on clamping devices.

To ensure the efficiency of the coating process can be provided, the film feed of the transfer film 5 from the film supply roll 8th to the transfer gap 6 and to the foil collecting roll 9 is progressively controllable, with the transfer film 5 is then stopped if no transmission of imaging or covering layers is to take place. The associated device preferably includes a corresponding feed control for the transfer film 5 , which ensures that at least that in the area of the press roll 3 and the impression cylinder 4 lying part of the film web is stationary, as long as the cylinder channel 26 the impression cylinder 4 passes. This will be later in 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 Teilfolienbahnen lesser width. Thus, with appropriate control by means of the device or devices for timing the film feed each of the partial film webs, the utilization of the transfer film 5 be improved even with zonally different lengths coating areas within a sheet.

Furthermore, in the film application module thus formed from the applicator 1 and the coating plant 2 dryer 16 be provided, by means of which the adhesive application or the entire film coating can be dried. Here come z. B. UV dryer in question.

Furthermore, the film application module can be a monitoring device 17 to scan the sheet surface included. The monitoring device 17 allows 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 on or between film guide rollers 14 by checking the web tension of the film web 5 be monitored. In a film web guide to one or more web tension measuring devices 19 intended. Furthermore, to stabilize the film web 5 between a first deflection roller and a first inlet roller to the transfer station, a stabilizing device 30 be arranged to flutter the film web 5 to reduce. The stabilizer 30 has z. B. two rotatably mounted rollers, which is for variable adjustment of the wrap angle of the film web 5 is provided 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 setting of the stabilizer 30 Can be used in conjunction with web tension control devices 19 and possibly a sensor device 20 be made for web break monitoring.

• 1. Ein Bahnzug oberhalb eines vorgebbaren Minimalwerts wird als Signal für Vorhandensein der Folienbahn 5 gewertet und der Maschinensteuerung zugeführt.
• 2. Ein Überschreiten des Maximalwerts des vorgebbaren Bahnzugs wird über Tänzerwalzen 18 oder Rollenantriebe 7 der Folienvorrats- 8 bzw. -sammelrolle 9 reduziert. Damit sind unzulässige Bahndehnung oder Bahnriss vermeidbar.
• 3. Bei Unterschreiten des minimal vorgebbaren Bahnzugs wird überprüft, ob die Bahnspannungsregelung noch aktiv ist. Ist eine Erhöhung der Bahnspannung über Tänzerwalzen 18 oder eine Bremse nicht möglich, wird Bahnriss erkannt.

Electrical signals of the web tension measuring devices are evaluated. Various operating states are possible for this:

• 1. A web train above a predetermined minimum value is used as a signal for the presence of the film web 5 evaluated and fed to the machine control.
• 2. Exceeding the maximum value of the predeterminable web train is over dancer rolls 18 or roller drives 7 the foil supply 8th or collecting roll 9 reduced. Thus, impermissible web elongation or web break can be avoided.
• 3. If the minimum specified tension is undershot, it is checked whether the web tension control is still active. Is an increase in web tension over dancer rolls 18 or a brake is not possible, web break is detected.

The additionally obtained information about the web tension as the actual value, in particular in the context of the aforementioned evaluations, can be used for the control of the printing or transfer process. For this purpose, 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 used 5 and the pressure or transfer conditions in the coating module 2 be dependent on 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 by means of parameter values from the setting of the transfer process on the coating module 2 to be changed.

The method relating to the film transfer is described in the described printing or application machine according to 1 as follows:
It is intended, at least in one the coating plant 2 following printing unit 50 apply a color print on the imagewise coated with a metallized layer sheet. Here, the sheet is from the coating plant 2 from the impression cylinder 4 via a sheet transfer drum or a sheet transfer unit to an impression cylinder 40 of the printing unit 50 transferred.
The printing unit 50 has as usual in offset printing the impression cylinder 40 , a rubber or blanket cylinder associated therewith 41 and a plate cylinder associated therewith 43 on. The plate cylinder 43 Here are shown schematically an inking unit and a dampening system assigned.
Between impression cylinder 40 and blanket cylinder 41 is another nip 60 educated. In this pressure gap 60 becomes printing ink from one on the plate cylinder 43 clamped pressure plate 44 out over one on the blanket cylinder 41 arranged cover 42 applied to the sheet.

The gap of the pressure gap 60 between the surfaces of the blanket cylinder 41 and the impression cylinder 40 is with the help of the blanket cylinder 41 associated adjusting devices 45 adjustable. This is usually spoken of in the area of offset printing from a Druckbeistellung, as said setting refers to the thickness of the processed material to be processed, in the printing gap 60 to be printed. For this purpose, a printing pressure is necessary to the ink from the blanket cylinder 41 on the on the impression cylinder 40 transferred substrate. The settings in relation to the transfer gap 6 done by means of other control devices 46 that of the press roll 3 assigned. The adjusting devices 45 . 46 are commonly used in offset printing on printing blanket or blanket cylinders of printing units or on cylinders of varnish modules.

Furthermore, as the surface of the press roll 3 a contoured or segmented pressing surface in the press fabric 10 be provided. For this purpose, according to the invention instead of a full-surface pressing area on one or more areas to be coated limited segmental pressing areas on the press roller 3 used.

The segmented pressing surface can be used as an isolated surface element, as an annular, narrow, the pressure roller 3 wrapping surface element, as a surface line following, a limited peripheral portion covering, across the width of the press roll 3 reaching surface element or be pronounced in the form of several such surface elements and so the press fabric 10 form.

The function of 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 opposing impression cylinder 4 - The entrapment of the transfer film 5 is given only if the segmented pressing surface the transfer film 5 touching the transfer gap 6 passes. In other words, the pressing surface should only be applied to the transfer film in the areas 5 can act where actually imaging layers of the transfer film 5 are transferred to the sheet.

• I. Zunächst kann zur Ausführung einer Folientaktung die Transferfolie 5 neben dem Zeitraum des Kanaldurchlaufes in sehr vorteilhafter Weise auch dann im Vorschub angehalten werden, wenn der zu beschichtende Bereich irgendwo innerhalb des Bildbereiches des Druckbogens liegt und noch nicht den Bereich der segmentierten Pressfläche erreicht hat oder der Bereich der segmentierten Pressfläche schon vor dem Ende des zu beschichtenden Bogenbereiches endet. Die Transferfolie 5 muss also nur dann transportiert werden, wenn die segmentierte Pressfläche innerhalb des Transferspaltes 6 zwischen Presswalze 3 und Gegendruckzylinder 4 im Eingriff ist. So kann die Ausnutzung der Transferfolie 5 zwischen den zu beschichtenden Druckbogen fast vollständig erfolgen. Der Folientransport wird hierbei beim Einsatz einer ringförmigen Pressfläche nur beim Kanaldurchlauf angehalten. Beim Einsatz von Pressflächen in Form einzelner oder mehrerer, zylinderbreiter, über Teilumfänge reichender Segmente kann der Folienvorschub zusätzlich während freier Flächen am Umfang der Presswalze 3 angehalten werden.
• II. Eine weitere Verbesserung der Folienausnutzung der beschriebenen Art ergibt sich dadurch, dass die Transferfolie 5 in eine oder mehrere Teilfolienbahnen geringerer Breite aufgeteilt wird. Die ist insbesondere in Verbindung mit der segmentierten Pressfläche von großem Vorteil. Bei einer segmentierten Pressfläche kann die Transferfolie 5 auf die Breite der Pressfläche beschränkt eingesetzt werden. Die Einsparung beim Folienverbrauch ist bedeutend. Die Folienführung im Transferspalt 6 wird durch eine vollflächige Auflage einer schmalen Bahn der Transferfolie 5 auf der segmentierten Pressfläche – zumindest im Transferspalt 6 – deutlich verbessert. Damit kann bei entsprechender Steuerung mit Hilfe der Einrichtung bzw. Einrichtungen zur Taktung des Folienvorschubes jeder der Teilfolienbahnen, die Ausnutzung der Transferfolie 5 auch bei zonal unterschiedlich langen Beschichtungsbereichen innerhalb eines Bogens verbessert werden. Dazu wird jede Teilfolienbahn nur genau in dem Bereich weitergefördert, wo die bildgebende Oberflächenschicht aufzutragen ist. In den nicht zu beschichtenden. Bereichen kann jede Teilfolienbahn unabhängig von den anderen Teilfolienbahnen stillgesetzt werden, wobei damit kein unnötiger Folienverbrauch entsteht.

There are two effects in a coating module 2 with in a press cover 10 provided segmented pressing surface achievable:

• I. First, to perform a film timing, the transfer film 5 in addition to the period of the channel passage in a very advantageous manner are then stopped in advance when the area to be coated is located somewhere within the image area of the sheet and not yet the area of the segmented Pressing area has reached or the area of the segmented pressing surface ends before the end of the arc area to be coated. The transfer foil 5 So only has to be transported if the segmented pressing surface within the transfer nip 6 between press roll 3 and impression cylinder 4 is engaged. So can the utilization of the transfer film 5 almost completely between the sheets to be coated. The film transport is stopped here when using an annular pressing surface only at the channel pass. When using pressing surfaces in the form of single or multiple, cylinder-wide, sub-segments reaching segments of the film feed can additionally during free areas on the circumference of the press roll 3 be stopped.
• II. 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. This is particularly advantageous in connection with the segmented pressing surface. In a segmented pressing surface, the transfer film 5 be used limited to the width of the pressing surface. The savings in film consumption is significant. The foil guide in the transfer gap 6 is characterized by a full-surface edition of a narrow web of the transfer film 5 on the segmented pressing surface - at least in the transfer nip 6 - clearly improved. Thus, with appropriate control by means of the device or devices for timing the film feed each of the partial film webs, the utilization of the transfer film 5 be improved even with 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 not to be coated. Each section of film web can be shut down independently of the other sub-film webs, whereby no unnecessary film consumption arises.

In combination with the above-mentioned method, it is thus also possible to use different types of film side by side. This allows surfaces of different film color or different smoothness or texture to be created.

• – Für das Gummituch/die Pressbespannung der Presswalze geeignete so genannte Unterlagebogen oder auch Formatbogen, die sich nur auf die wirksame Fläche für den Folientransfer erstrecken
• – Unterlagebogen/Formatbogen, die gemeinsam mit dem Gummituch/mit der Pressbespannung an der Presswalze aufgespannt werden
• – Unterlagebogen/Formatbogen, die jeweils für sich gespannt und unterhalb des Gummituches/der Pressbespannung an der Presswalze arretiert werden können
• – Auf die Presswalze aufklebbare Unterlagesegmente, die im Wirkbereich auf der Oberfläche der Presswalze positioniert und vom Gummituch überspannt werden

For the construction of the partial press fabric, different working materials known per se can be used. Can be used

• - For the blanket / the press fabric of the press roll suitable so-called underlay sheets or even format sheets, which extend only to the effective area for the film transfer
• - Underlay sheet / size sheet, which are clamped together with the blanket / with the press fabric on the press roll
• - Underlay sheet / format sheet, each of which can be tensioned on its own and locked under the blanket / press fabric to the press roll
• - On the press roll stick-on pad segments, which are positioned in the active area on the surface of the press roll and spanned by the blanket

As a substructure of the corresponding press fabric 10 with segmented pressing surfaces is 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 fixing the press cover 10 For example, tensioning spindles may be as in a blanket cylinder or combination tensioning rails for blankets or printing plates as known from rubber or forming cylinders. The surface of the press cover 10 Depending on the structure, it is also suitable for profiled imprints. This results in an extended range of applications for the process of cold foil stamping. Using the above elements, a very simple and fast handling of the device of the film application module is possible.

• – eine Kanaltaktung beim Durchlauf von Zylinderkanälen der Presswalze 3 und des Gegendruckzylinders 4,
• – eine Formattaktung oder eine Sujettaktung, die auf die Beschichtungs- bzw. Applikationslänge bezogen ist, bei auf die Formatlänge des Folientransfers am Umfang der Presswalze 3 beschränkter Folienzuführung und
• – eine Prägebereichstaktung bei Beschränkung der Folienführung auf durch segmentierte Pressbereiche in der Pressbespannung 10 der Presswalze 3 definierter Folienzuführung.

angeführt werden.According to the invention devices are provided which the cyclical promotion of the film web 5 allow. Here, as operating variants from the previously stated facts

• - A channel timing in the passage of cylinder channels of the press roll 3 and the impression cylinder 4 .
• - A formattaktung or Sujettaktung, which is based on the coating or application length, on the format length of the film transfer at the periphery of the press roll 3 limited slide feeder and
• - A Prägebereichstaktung when limiting the film guide on by segmented pressing areas in the press fabric 10 the press roll 3 defined film feed.

be cited.

For the film feed (and the discharge) is usually the drive of the film rolls 8th . 9 continuously provided, as the mass of film rolls 8th . 9 too big for a quick change of the drive movement. This results in the Braking the film web until re-accelerating in the transfer area in the supply and discharge of the film web 5 opposite to the movement of the film rolls 8th . 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 5 will be explained.

Therefore, solutions are proposed according to the invention, which in continuous Nachförderung or removal of the film web 5 buffers accumulating excess or missing pieces of track can. These are basically already with the dancer rollers 18 described as a variant of foil stores. The dancer rollers 10 but are not accurate enough to the described in the described high-speed clocking in the film transfer process controllable, especially since they usually far away from the place of consumption and close to the film roll 8th . 9 are arranged to maintain the web tension there. In the 2 to 5 Therefore, further possibilities for the rapid compensation of web displacements in the film timing in the cold foil process are given.

In 2 is a film transfer module accordingly 1 shown. Here are the dancer rollers 18 arranged to regulate the web tension. To compensate for major changes in the film promotion, such as stopping the film promotion in the transfer area (range of film transfer between press roll 3 and impression cylinder 4 ) without film consumption (channel timing, formattaktung, timing over embossed areas), are also in front of the inlet of the fresh film web 5 in the transfer gap 6 and after the exit of the used film web 5 from the transfer gap 6 as drive groups 22 designated roller pairs 23 . 24 arranged.

The drive groups 22 are described here for all the following embodiments and each show a pair of rollers, the film web 5 pinch and so defined with respect to a desired transport path can lead. The roller pairs of the drive groups 22 consist in 2 each from a foil guide roller 24 and a drive roller 23 , Both the foil guide roller 24 as well as the drive roller 23 is at least partially drivable. The drive of the drive roller 23 can not only in the transport direction of the film web 5 (from film roll 8th to 9 ) but can also generate return strokes. This is useful because the film web 5 at a deceleration does not stop immediately and thus runs over a desired breakpoint. This could be a piece of the film web 5 not used. If a short defined return stroke after slowing down and stopping the film web 5 In the transfer area, this step reduces or eliminates this unnecessary film consumption. This is the drive of the drive roller 23 quickly controllable. The drive roller 23 itself can be segmented in order to be able to execute the changing drive movements quickly. Furthermore, the film guide roller 24 opposite the drive roller 23 but can be swung on and off, but it can also permanently on the drive roller 23 stay employed.

So it can also be provided that the film guide roll 24 one more or less through the film web 5 perform controlled movement while the drive roller 23 performs a conveying movement and the return stroke movement. The foil guide roller 24 performs for a defined period in relation to the film transport direction a backward movement only by controlled hiring against the on the drive roller 23 overlying film web 5 out. The drive roller 23 then performs a continuous transport movement against the direction of the film web 5 by. This is possible because the film web 5 at this time due to lack of contact pressure by the press roll 3 against the impression cylinder 4 is freely movable in the transfer area. Furthermore, the drive groups 22 also by deceleration at the time of foil dislocation, here at least on the feed side to the transfer gap 6 , the film web 5 Hold in the transfer area under the necessary tension, so that when the film transfer begins again with pressing by the press roller 3 against the impression cylinder 4 immediately good transfer quality is achieved again.

The system of the drive group 22 is also in segmented arranged film guide rollers 24 for format-width drive rollers 23 both for the guidance of a full-format wide film web 5 as well as for the guidance of, possibly also distributed, arranged Teilfolienbahnen 5 suitable. For this purpose, the segments of the film guide roll 24 correspondingly adjustable to the positions of the partial film webs 5 in the axial direction to the press roll 3 be arranged.

The drive group 22 can be simplified by the fact that the drive roller 23 with a rough or adhesive surface or as a suction roll is executed. With a correspondingly large loop through the film web 5 then sufficient adhesion for safe guidance of the film web 5 on the drive roller 23 be achieved. Then could on a foil guide roller 24 , even in segmented form, can be dispensed with. This is also true in terms of the format-width design of the drive roller 23 harmless. A designed as a suction roller drive roller 23 could then be designed so that, if necessary, provided in segments corresponding to the respective to be processed film web widths switchable suction devices.

The dancer arrangement for balancing the conveying paths of the transfer film web 5 at the timing of the feed can also in the form of operated by means of vacuum loop guides for the transfer film web 5 be executed.

The film feed and discharge can with controllable or self-regulating systems such as friction shafts and individual drives on the film rolls 8th . 9 be executed in the variants of a format-wide film roll or with multiple sub-film rolls.

Furthermore, it is provided that the transfer film web 5 in the area of the transfer gap 6 in an approximately tangential path on the press roll 3 is passed. This is a foil section 5.1 in the area of the foil inlet into the transfer nip 6 from the film guide roll 14 at a corresponding angle with respect to a tangent through the transfer nip 6 directed into this. Furthermore, a film section 5.2 in the area of the film outlet from the transfer nip 6 from another film guide roll or the outlet side drive roller 23 at a corresponding angle with respect to a tangent through the transfer nip 6 led out of this. By forming the angle between the film sections 5.1 and 5.2 or the respective angle between the film sections 5.1 respectively. 5.2 and a tangent (see tangent line T in 4 ) through the transfer gap 6 On the one hand, it is achieved that the grippers on the impression cylinder 4 during the passage of the cylinder channel 26 not in the transfer film web 5 push in and damage them. This concerns in particular the outlet side of the transfer film web 5 at the transfer gap 6 , because there the so-called gripper back slightly into the area of the cylinder channel 27 the press roll 3 protrude and against the freely stretched transfer film web 5 can press.

Furthermore, the angle between the film sections 5.1 and 5.2 but also chosen so that the transfer film web 5 the surface of the press roll 3 touched only in a very narrow area. Ideally, this should be across the full width of the press roll 3 only a contact strip of a few mm in length on the circumference of the press roll 3 be. 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 gap 6 Can be done quickly by the transfer film 5 shut down 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).

The arrangement of the extension of the film sections 5.1 and 5.2 in relation to a tangent T is in 4 also shown schematically.

In 3 and 4 is the inventive arrangement of format documents for the press cover 10 shown.

In 3 is the press fabric 10 for the press roll 3 shown in a flat representation. 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 workspaces are divided into three format documents 30 . 31 . 32 marked, which is the left edge (beginning of printing) of the press fabric 10 connect and contrary to the working direction of format edges K1, K2, K3 ends. The format documents 30 . 31 . 32 are provided with a width corresponding to the required working areas and with the format edges K1, K2, K3 arranged in the working area corresponding to the respective desired length of the working format and thus cover different areas of a press roller on the circumference of the press roller 10 from.

In 4 this arrangement is schematic on a cylinder section through the transfer gap 6 forming pressure roller 3 and the associated impression cylinder 4 transmitted with indication of the direction of rotation. Here are the format documents 30 . 31 . 32 superimposed on each other in the view and therefore drawn differently thick. The format edges K1, K2, K3 are now at different. Peripheral points of the surface of the press roll 3 , The press fabric 10 is inscribed over the documents 30 . 31 . 32 placed and follows their surface contour. Thus, in the area of the format edges K1, K2, K3, fine steps form in the surface of the press cover 10 , after the end of a corresponding reduction in pressure in the transfer nip 6 is reached when there a sheet together with the on the press roller 3 adjacent transfer film web 5 to be led. Due to the pressure reduction no film transfer can take place there, since the transfer film 5 is no longer clamped. This is here in relation to the pad 30 and shown for the associated format edge K1. Across the width of the press roll 3 This results in the same state for the two documents 31 and 32 in terms of their format edges K2 and K3. This will be the transfer film 5 released in different circumferential positions with respect to the three working areas of the press. Preferably, the transfer film 5 in this case, in three sub-film webs corresponding to the width of the work areas of the press substrate for the size documents 30 . 31 . 32 divided up. If now for each of the partial webs of the transfer film 5 a clocking device according to the above description is provided each partial film web at the time of release during passage of one of the format edges K1, K2, K3 through the transfer nip 6 be stopped in transport, since they are no longer in the transfer gap 6 is clamped. This allows considerable savings in film consumption. The same applies to the adjoining cylinder channel 27 ,

In 4 continues to be the leader in the transfer film web 5 in foil sections 5.1 and 5.2 before and after the transfer gap 6 as shown in the context of 2 was explained. Here is a tangent T on the press roll 3 through the transfer gap 6 shown 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 opposite the tangent line T may be larger than that of the film section 5.1 on the inlet side in front of the transfer gap 6 , The the respective angle of the film sections 5.1 and 5.2 relative to the tangent line T determining film guiding elements are indicated by dashed lines as guide rollers.

In the 5a and 5b schematically shows the arrangement of a press fabric according to the invention on the unwound surface shown a press roll 3 shown. Here is the surface of the press roll 3 in their extent. in the direction of rotation with a format length 38 designated. The surface is followed by a cylinder channel 27 at.

In 5a is on the surface of the press roll 3 an over the entire surface extended pad sheet 39 arranged. Above the pad sheet 39 is a format underlay used for pressing during cold foil transfer 30 arranged. About the pad sheet 39 and the format document 30 is the press fabric 10 appropriate. The fixation on the press roller 3 done with known clamping devices.

As an alternative, in 5b is on the surface of the press roll 3 a format spread over the entire surface 31 appropriate. The format document 31 is designed as a high-pressure plate or paint plate known technique. From such a high-pressure plate, a produced with known plate-making process Presssujet is worked out, compared to the over the format length 38 reaching base of the high pressure plate is shortened. Accordingly, a paint plate of known type can be formed. The pressjet forms the effective pressing surface of the size pad used for the press-form-related pressing during cold foil transfer 31 , Above the format document 31 is the press fabric 10 appropriate. The fixation of the press fabric 10 on the press roller 3 also takes place here with known clamping means. Furthermore, in the arrangement according to 5b a pad sheet be provided below the high pressure plate or paint plate.

If in the arrangement according to 5b the press cover 10 It is also possible to omit an effective format document 31 be formed, which can then be used directly for the desired pressure on a selected print format during film transfer.

As already indicated above, transition regions Ü in the case of the respectively illustrated transitions from the region outside the respectively defined printing format or press set to the beginning of the printing format at the edge of the format documents 30 or 31 in the arrangements 5a and 5b determine. The printing format or press pattern used here is designated as the application length AL. The transition areas Ü result from the transition of the support of the press cover 10 from the press roll 3 or a support such as the underlay sheet 39 or the base area of the high pressure plate or the stripped lacquer plate except for the size documents 30 respectively. 31 ,

For the transition region Ü is then a start-stop ramp for the acceleration and braking movement of the film web 5 to adjust during film timing. This is necessary for safety reasons to ensure complete film transfer. Is in 5b an arrangement without press clothing 10 executed, 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 controlled by an appropriate control software for driving the film web 5 can be set and is the same or different adjustable for both format edges, ie at startup and in the process. In connection with the application length AL, the 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 type of format document 30 . 31 or the structure of format document 30 . 31 and press clothing 10 automatically in adjusted start-stop ramps.

The above-described relationships with regard to the transition regions Ü and the application length AL also apply to the arrangements according to FIGS 3 . 4 and 6 to 8th ,

In the 6 and 7 is the arrangement of a press fabric 10 with format documents related to a print format of the same length 32 . 33 . 34 shown one in the circumferential direction of the press roll 3 same length, but in each case different assignment over the format length 38 the working surface of the press roll 3 are arranged with respect to the circumferential direction.

In 6 are three developments of the surface of the press roll 3 shown. The effective working surface of the press roll 3 is by bounding arrows as the format length 38 referred to, extending in the direction of the circumference of the press roll 3 extends. The working surface of the press roll 3 is doing by a cylinder channel 27 limited, here at the right end of the format length 38 So at the end of a print 29 , Is shown and the mutatis mutandis to the press roll 3 up to a print start 28 extends. In each of the subfigures is a format document 32 or 33 or 34 on the working surface of the press roll 3 each of which covers a shorter print format for cold foil transfer that does not cover the entire format length 38 extends. The press fabric 10 However, in each case covers the press roller 3 over the entire format length 38 from. In the first part of the figure is the format document 32 from the beginning of printing 28 until one of the end of printing 29 extends spaced position. Thus, a print format for the cold foil transfer can be covered, which is about the shorter print size according to the format pad 32 , starting at the beginning of printing 28 and ending before the end of printing 29 , the format length 38 extends. In the second part of the figure is the format document 33 with a distance after the start of printing 28 until one of the end of printing 29 extends spaced position. Thus, a print format for the cold foil transfer can be covered, which is about the shorter print size according to the format pad 33 , starting after the beginning of printing 28 and ending before the end of printing 29 , the format length 37 extends. In the third part of the figure is the format document 34 with a distance after the start of printing 28 until the end of printing 29 extends. Thus, a print format for the cold foil transfer can be covered, which is about the shorter print size according to the format pad 34 , starting after the beginning of printing 28 and ending at the end of printing 29 , the format snaps 38 ends.

In 7 is the layout of the format documents 32 . 33 . 34 in the plan view of the unrolled shown working surface of the press roll 3 shown. The format document 32 is here in a corresponding to the first part of the figure 6 designated narrow working track A shown. The format document 33 is here in a corresponding to the first part of the figure 6 designated narrow working track B shown. The format document 34 is here in a corresponding to the first part of the figure 6 designated narrow working track C shown. The format documents 32 . 33 . 34 but can also be in their respective position to the format length 38 over the entire width transverse to the movement or circumferential direction of the press roll 3 extend.

With the arrangements shown can be over the width of the press roll 3 extending. Format documents 32 . 33 . 34 a foil saving in areal Cold foil transfer in the extent of the distances of the format documents 33 . 33 . 34 to the beginning of printing 28 and / or the end of printing 29 be achieved because in areas not covered by the format document 30 are covered and in which the cylinder channel 27 extends, the film transport during the rotation of the press roll 3 and the impression cylinder 4 can be stopped with the sheet. In these areas is the transfer film 5 in the area of the transfer gap 6 not pinched.

When in working tracks A, B, C arranged format documents 32 . 33 . 34 can be achieved by using adapted to the working tracks A, B, C partial film webs lesser width, a film saving corresponding to each of the partial film webs. In this case, the transport of the partial film webs is stopped in the previously described corresponding areas, if the respective partial film web is not between the press fabric 10 on the press roller 3 and one on an associated impression cylinder 4 arranged sheet for performing the film transfer in the area of the transfer gap 6 is trapped. Of course, this functionality also applies to the section of the cylinder channel for each partial film web 27 ,

Finally, in 8th a distributed arrangement of format documents 34 . 35 . 36 and 37 on the working surface of the press roll 3 shown. The work surface is again through the format length 38 designated. On the work surface of the press roll 3 are in each worklanes D, E and F the format documents 34 to 37 distributed. In working track D is the format document 34 the beginning of printing 28 assigned next.

In working track E are the format documents 35 and 36 arranged one behind the other where the format pad 36 the printer 29 is assigned to the next. In working track F is the format document 37 in a middle area between the beginning of pressure 28 and printing ends 29 anbracht. The formation of the effective pressing surfaces with the press fabric 10 is in the circumferential direction of the press roll 3 Shown schematically to the right of the representation of the entire work surface.

Such an arrangement can be achieved by pre-mounting the format documents 34 to 37 on a mounting pad 48 to reach. For this, the format documents 34 to 37 be designed as self-adhesive elements. They can also be attached by means of magnetically acting adhesive. Likewise, here can be a high pressure plate or a paint plate known technique corresponding 5b be used on the the format documents 34 to 37 are worked out accordingly. The mounting pad 48 or a corresponding high-pressure plate are preferably for equitable assembly on the press roller 3 with register facilities 47 Mistake. These are, for example, as known register punches at the beginning of printing 28 formed and act with corresponding stop means, such as register pins on the press roller 3 together. Thus, a prefabricated press fabric can be produced and easily in the coating module 2 on the press roller 3 be attached.

Furthermore, in conjunction with the register devices 47 or regardless of a not shown here adjusting device in conjunction with the mounting pad 48 be provided. By means of such an adjusting device, the mounting pad 48 below the press fabric 10 be independently positioned to the location of the Presssujets the format documents 34 to 37 on the working surface of the press roll 3 adjust.

The embodiment according to 8th 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 partial film webs are chosen here only as wide as those of the format documents 34 to 37 is predetermined. The film transport can then for each Teilfolienbahn in the range of non-increased areas on the press roll 3 and in the area of the cylinder channel 27 be stopped separately.

The measures for implementing the mode of operation according to the invention are simple and common for types of press rolls 3 in the form of molded or blanket or blanket cylinders feasible.

The format documents 30 to 37 can be either full-surface or partial (see 3 . 7 and 8th ) in virtually every imaginable arrangement on the press roll 3 be attached. Here is an assembly together with the press cover 10 or separately executable. The format documents 30 to 37 can be used as conventionally used underlay sheets for blankets or even as on the surface of the press roll 3 be stickable documents made of self-adhesive film. The format documents 30 to 37 are formed from so-called calibrated material, the thickness of which is precisely defined and whose flatness is of high quality, in order to ensure a uniform delivery pressure for the cold foil transfer in the transfer nip 6 to ensure.

As a principle advantageous and easy to use arrangement is a stripped rubber blanket or a paint plate for the production of format documents 30 to 37 used. The blanket or plate then preferably has a metal backing plate and a photopolymer surface. In this case, then no additional covering press fabric 10 be used. As a further advantageous and easy to use arrangement, the use of one or more matched to the Presssujet or the application length A pad sheet with a blanket as a press cover 10 provided so that the underlay sheets then allow the cold foil transfer over the desired application length AL.

LIST OF REFERENCE NUMBERS

1

commissioned

2

coating module

3

press roll

4

Impression cylinder

5

Transfer film / sheet

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

Printing blanket / blanket cylinder

14

Folienleiteinrichtung

15

Printing plant security

16

dryer

17

Inspection device / monitoring system

18

dancer roll

19

Web tension control

20

Web break monitoring

21

Druckzylinderblasvorrichtung

22

drive group

23

Folienleitwalze

24

drive roller

25

Folienleitwalze

26

Cylinder channel of the impression cylinder

27

Cylinder channel of the press roll

28

print start

29

print end

30

Format support

31

Format support

32

Format support

33

Format support

34

Format support

35

Format support

36

Format support

37

Format support

38

format length

39

Underlay sheets

40

Impression cylinder

41

Blanket cylinder

42

Blanket / blanket

43

plate cylinder

44

printing plate

45

setting device

46

setting device

47

register means

48

Mounting pad

50

printing unit

60

nip

K1

format edge

K2

format edge

K3

format edge

A

work track

B

work track

C

work track

D

work track

e

work track

F

work track

T

Tangent, tangent line

Ü

Transition area

AL

application length

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0569520 B1 [0002]
• DE 102009026438 A1 [0004]
• DE 10213651 A1 [0005]

Claims (14)

Device for transfer of image-forming layers from a carrier foil to printed sheets at least with an applicator ( 1 ) for an imagewise coating of the printed sheets with an adhesive and with a coating module ( 2 ) for transferring the imaging layers from the carrier foil to the printed sheet in a transfer nip ( 6 ) between an impression cylinder ( 4 ) and a press roll ( 3 ), wherein the carrier film with the coated side in contact with the printed sheet together with this through the transfer nip ( 6 ) is guided while the image-forming layers are imagewise transferred to the printing sheet, and with a device for feeding the transfer film ( 5 ) to the coating plant ( 2 ) and for removal from the coating plant ( 2 ) with a drive for moving the transfer film in the working direction, wherein the film feed of the transfer film ( 5 ) is controllable by means of a film guide such that the transport of the transfer film ( 5 ) is stopped when in the transfer gap ( 6 ) of the coating plant ( 2 ) no transfer of an imaging layer to a printed sheet, characterized in that a control in conjunction with a film guide of the transfer film ( 5 ) is provided such that the film transport at specified times when conveying the transfer film ( 5 ) through the transfer gap ( 6 ) is stopped or started stopped, the surface of the pressing cylinder ( 3 ) a press cover ( 10 ), which with one or more, the bearing surface of the press fabric ( 10 ) on the press roll ( 3 ) contouring and extending to an outline of a pressing surface format documents ( 30 to 37 ) is provided, wherein the pressing surface on the press roller ( 3 ) is limited to the maximum area to be coated, and wherein when passing through a portion of the press roll ( 3 ) outside of the format documents ( 30 to 37 ) is stopped on the area to be coated limited pressing surface of the film feed, wherein the pressure roller ( 3 ) with further contact of the transfer film ( 5 ) passes through. Device according to claim 1, characterized in that the transfer film ( 5 ) is subdivided into one or more sub-foil webs of lesser width and that the sub-foil webs are positioned or juxtaposed to the transfer nip ( 6 ), wherein the partial film webs are provided with the same or different imaging layers and layers of different color and / or different gloss and / or different surface structure can be generated. Apparatus according to claim 1 or 2, characterized in that the format documents ( 30 . 31 . 32 ) as calibrated backing sheets ( 39 ) for blankets and as together with the press cover ( 10 ) on the press roll ( 3 ) tensionable backing sheets ( 39 ) for blankets or as separately held and below the press cover ( 10 ) on the press roll ( 3 ) mountable and supported underlay sheets ( 39 ) are designed for blankets. Apparatus according to claim 1 or 2, characterized in that the format documents ( 30 to 32 ) formed as a calibrated and one-sided adherent formed sheet and on the surface of the press roll ( 3 ) are adhesively attached and that they by means of press fabric ( 10 ) are spanned. Apparatus according to claim 3 or 4, characterized in that format documents ( 30 to 32 ) as a calibrated and one-sided adhesive backed sheet ( 39 ) formed on the surface of the press roll ( 3 ) adhesively attached and by means of press fabric ( 10 ) are spanned. Apparatus according to claim 1 or 2, characterized in that the format documents ( 30 to 32 ) are designed as vacuum blankets and that the vacuum blankets together with the press cover ( 10 ) on the press roll ( 3 ) or that the vacuum blankets are held separately and below the press fabric ( 10 ) on the press roll ( 3 ) are mounted and held. Apparatus according to claim 1 or 2, characterized in that the format document ( 31 ) is formed as a high-pressure mold, wherein on the high-pressure mold, a one-part or multi-part press nozzle comprising the regions of the film transfer has been worked out, in that the format backing is formed on the surface of the press roll ( 3 ) is stretched or adhered and held separately or together with the press fabric ( 10 ) on the press roll ( 3 ) is tensioned and that the format documents by means of press fabric ( 10 ) are spanned. Apparatus according to claim 1 or 2, characterized in that format documents ( 33 to 37 ) are formed as individual elements that the format documents ( 33 to 37 ) are formed on one side and that the format documents ( 33 to 37 ) on the surface of the press roll ( 3 ) are adhesively attached, wherein an adhesive or magnetic adhesion is provided, and that by means of press fabric ( 10 ) are stretched over. Apparatus according to claim 1 or 2, characterized in that format documents ( 33 to 37 ) are formed as individual elements that the format documents ( 33 to 37 ) are formed on one side and that the format documents ( 33 to 37 ) on a mounting pad ( 48 ) are adhesively attached, wherein an adhesive or magnetic adhesion is provided that the mounting pad ( 48 ) with the format documents ( 33 to 37 ) on the surface of the press roll ( 3 ) and that the mounting pad ( 48 ) with the format documents ( 33 to 37 ) by means of press fabric ( 10 ) are spanned. Apparatus according to claim 1 to 9, characterized in that the format documents ( 30 to 37 ) or a mounting pad ( 48 ) with format documents ( 33 to 37 ) or a format document ( 31 ) in the manner of a high-pressure plate by means of register devices ( 47 ) on the press roll ( 3 ) are placed positionable. Apparatus according to claim 1 to 10, characterized in that the format documents ( 30 to 37 ) or a mounting pad ( 48 ) with format documents ( 33 to 37 ) or a format document ( 31 ) in the manner of a high-pressure plate by means of an adjusting device and optionally additional register devices ( 47 ) on the working surface of the press roll ( 3 ) and opposite or together with the press cover ( 10 ) are mounted positionable. Apparatus according to claim 1 to 11, characterized in that the film web ( 5 ) are associated with controllable conveying devices for braking and accelerating in time with the processing of the film transfer, wherein the conveying devices ( 22 . 33 ) formed as roller pairs the film web ( 5 ) lead by clamping and the pairs of rollers are at least partially driven. Process for coating printed sheets in a sheet-processing machine, in particular a sheet-fed rotary printing press, using a transfer film consisting of image-forming layers and a carrier film ( 5 ) for the transfer of image-forming layers from the carrier film to the printed sheets in that - at least with an applicator ( 1 ) an imagewise coating of a printed sheet with an adhesive, and - that by means of a coating module ( 2 ), the image-forming layers are transferred from the carrier film to the printed sheet, wherein in the coating module ( 2 ) an impression cylinder ( 4 ) and a press roll ( 3 ) a common transfer gap ( 6 ) through which the transfer film ( 5 ) can be guided under pressure in such a way that, with the coated side on the counter-pressure cylinder ( 4 ) is placed on the printed sheet, - wherein the imaging layer / s after the exit of the sheet from the transfer nip ( 6 ) is adhered to the surface of the printing sheet in the region of the image-wise areas provided with adhesive and is lifted off the carrier film, the transfer film ( 5 ) in the transfer gap ( 6 ) is pressed against the printed sheet at least in the area of the imagewise coating / s and - that a partial increase of the surface of a press fabric ( 10 ) on a press roll ( 3 ) by inserting format documents ( 30 to 37 ) below the press fabric ( 10 ) on the press roll ( 3 ) is carried out in the region of a pressing surface designed as a press nozzle, and - that the transfer film ( 5 ) only through the transfer gap ( 6 ), if a contact between the transfer film ( 5 ), which are based on the format documents ( 30 to 37 ) on the surface of the press roll ( 3 ) lying press fabric ( 10 ) rests and on the counter-pressure cylinder ( 4 ) is carried out guided overhead printing material. Method according to claim 13, characterized in that on the press roll ( 3 ) one or more format documents ( 30 to 37 ) separately or in conjunction with the press cover ( 10 ) or by means of a mounting pad ( 48 ) on the surface of the press roll ( 3 ) are mounted, wherein the mounting pad ( 48 ) is provided as a magnetic film, adhesive film or vacuum blanket on which the format documents ( 30 to 37 ) are adhesively attached, such that they have a press surface as a press surface, the surface of which is adapted to the areal extent of the image-wise coatings, and in that the transfer film ( 5 ), circumferentially and / or axially of the press roll ( 3 ), only in the area of provided with pressing surfaces circumferential and / or axis sections of the transfer nip ( 6 ) is supplied.

Images