DE102009047455A1 - Device for the laser treatment of film coatings - Google Patents

Abstract

The film coating 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, in a printing press, a coating module 2 or an applicator 1 or printing units 106, 107 or coating units 108 associated therewith is provided with at least one laser device 109-114 for the treatment of printed sheets 133 by means of laser radiation.

Description

The The invention relates to a device for the treatment of cold foil transfer coated substrates according to the preamble of claim 1.

Coatings on printed sheets can be produced by cold foil transfer. 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 coating module following the printing unit with a counter-pressure cylinder and a press roller, a film guide is provided in which a film strip or a transfer film web is guided by a film supply roll through the transfer nip of the coating module between the impression cylinder and the press roll. The film strip is wound up again on the outlet side. The transfer film has a carrier layer and a release layer on which imaging layers such as metallic layers, for example of aluminum, can be applied. After transporting the printing sheet and transfer film through the transfer nip, the metallic layer adheres to the substrate in the area of the adhesive pattern.

The DE 203 03 574 U1 describes that controlled by an image processing system faulty signatures or benefits are marked or labeled by a printing device. Mention should also be made here of a laser printing device, which may also be associated with the boom of a sheet-fed press.

task The invention is a fast and cost-optimal additional processing to create in Kaltfolientransfer coated sheets.

Solved This object is achieved with the features according to claim 1.

In Advantageously, the device is characterized that of a printing press with a module for the cold foil transfer at least one laser marking device is assigned.

Thereby results in an extended range of applications for the Method of cold foil stamping. The makeready shortening is achieved by prepared press cylinder lifts. In addition, register automation can be introduced become.

The Device is also advantageously used to a Improvement of the film utilization to achieve that the Transfer film in one or more Teilfolienbahnen lesser width is split. In combination with the aforementioned method can so different types of films are used side by side.

If in a sheet processing machine several modules in a row provided, the application of different layers, planar or imaging coatings or metallization layers occur one after another within a subject. Here it is possible to use adhesive patterns Imaging layers next to each other with different image pattern elements to be transferred and differently pre-treated or post-treated.

The Pre- or post-treatment of coated substrates is more advantageous Way through a coordinate-controlled, programmable system, in particular a scanner system in conjunction with a laser beam source, possible. The pulsed control of the beam source allows individual Create points or lines in any order on the bow. Due to the laser irradiation are different markings or also tactile structures in one on the substrate or the substrate applied colored reactive or even bloating Color or a paint or other laminate achievable. The laminate can before or after the printing process on the Substrate have been applied. The laminate becomes punctiform changed exactly where it is with that of the laser radiation is taken.

in the Below, the invention is illustrated in more detail with reference to figures.

there demonstrate:

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

2 a printing machine according to the invention with arrangements of laser devices,

3 a representation of a laser device and

4 another printing machine according to the invention with arrangements of laser devices.

• – 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 rotation pressure machine containing two printing units and 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 For example, be provided as a plastic coating, comparable to a blanket or blanket, which is held in a cylinder channel on jigs.

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. This is a device with a feed control for the transfer film 5 provided so that at least that in the region of the press roll 3 and the impression cylinder 4 lying part of the film web is changed in its web guide as long as the cylinder channel passes.

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 a 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. At the stabilizer 30 are the guiding effect and the damping effect on the film web 5 adjustable depending on the operating status. This can be used in conjunction with web tension control devices 19 and possibly a sensor device 20 be made for web break monitoring.

It is intended, at least in one 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 an arc 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.

The settings in relation to the transfer gap 6 done by means of other control devices 46 that of the press roll 3 assigned.

In 1 the places of action of the printing jobs or pressings are designated DB1 and DB2 and coincide with the transfer 6 or printing gap 60 ,

Furthermore, as the surface of the press roller 3 a contoured or segmented pressing surface in the press fabric 10 be provided. For this purpose, instead of a full-surface pressing area on one or more areas to be coated limited segmented pressing areas on the press roller 3 used. In combination, different types of film can be used side by side. This allows surfaces of different film color or different smoothness or texture to be created.

Farther to be used in the sheetfed offset press in conjunction with the cold foil transfer process a pre- or post-treatment of the substrate or its coating be executed. These are not closer illustrated laser writing or marking devices provided. The working distance is for the deflection system of the laser devices designed so that the lasers radiate over the entire sheet width can be deflected to as few as possible to need individual laser units.

through Laser devices can print images different Tasks are performed.

• a) Markieren durch Zerstörung oder Entfernen von Bildteilen;
• b) Markieren durch Ergänzen von Bildelementen;
• c) Bebildern durch Schreiben mittels Verfärbungen;
• d) Bebildern durch Schreiben mittels Sublimation oder Thermosublimation;
• e) Prägeeffekten mit Hilfe von blähbaren Beschichtungen erzeugen;
• f) Bedruckstoffe strukturieren;
• g) Folienbeschichtungen strukturieren;
• h) Lackschichten strukturieren;
• i) Farbschichten strukturieren;
• j) Folienbeschichtungen strukturieren bevor diese auf das Substrat aufgebracht werden;
• k) Folienbeschichtungen strukturieren nachdem diese auf das Substrat aufgebracht werden;
• l) Auflageschichten (Farbe, Lack) zur Übertragung auf Druckbogen mit und ohne Folienbeschichtungen für die Steuerung von deren Übertragung auf das Substrat vorbehandeln;
• m) Unterlageschichten (Farbe, Kleber, Lack) von Folienbeschichtungen für die Steuerung von deren Übertragung auf das Substrat vorbehandeln;
• n) Unterlageschichten (Farbe, Kleber, Lack) von Folienbeschichtungen strukturieren bevor diese auf das Substrat aufgebracht werden;
• o) Unterlageschichten (Farbe, Kleber, Lack) von Folienbeschichtungen strukturieren nachdem diese auf das Substrat aufgebracht werden;
• p) Abdeckschichten (Farbe, Lack) von Folienbeschichtungen strukturieren nachdem diese auf das Substrat aufgebracht werden;
• q) Abdeckschichten (Farbe, Kleber) und Unterlageschichten (Farbe, Kleber, Lack) und Folienbeschichtungen gemeinsam oder in Kombination oder in Wechselwirkung strukturieren nachdem diese auf das Substrat aufgebracht wurden;
• r) Individualisieren von Nutzen auf den Druckbogen durch gezielte Markierung oder Beschriftung in Verbindung mit Daten, die im Maschinenrechner vorgehalten oder in der Druckvorstufe bereitgehalten werden;
• s) verformenden Bearbeiten der Folienschichten vor, während oder nach der Verarbeitung im Kaltfolientransfer;
• t) Auftragen oder Dosieren von Kleber für den Kaltfolientransfer durch Steuerung des Kleberauftrages, durch Wegbrennen von Kleber oder durch Sublimationsübertragung des Klebers.

Laser devices serve or are used to or can

• a) marking by destruction or removal of image parts;
• b) marking by adding picture elements;
• c) imaging by writing by means of discoloration;
• d) imaging by writing by sublimation or thermal sublimation;
• e) create embossing effects using intumescent coatings;
• f) structure substrates;
• g) structure film coatings;
• h) structure lacquer layers;
• i) structure color layers;
• j) structure film coatings before they are applied to the substrate;
• k) pattern film coatings after they are applied to the substrate;
• l) pre-treat coating layers (paint, varnish) for transfer to printed sheets with and without film coatings for the control of their transfer to the substrate;
• m) pre-treating backing layers (paint, glue, varnish) of film coatings for the control of their transfer to the substrate;
• n) pattern the base layers (paint, glue, varnish) of film coatings before they are applied to the substrate;
• o) pattern underlay layers (paint, glue, varnish) of film coatings after they have been applied to the substrate;
• p) structuring cover layers (paint, varnish) of film coatings after they have been applied to the substrate;
• q) pattern coats (paint, glue) and undercoats (paint, glue, varnish) and film coats together or in combination or in interaction after they have been applied to the substrate;
• r) individualizing of the benefit on the printed sheet by specific marking or inscription in connection with data, which are held in the machine computer or kept ready in the pre-press;
• s) deforming the film layers before, during or after processing in cold foil transfer;
• t) application or dosing of adhesive for the cold foil transfer by controlling the adhesive application, by burning away of adhesive or by sublimation transfer of the adhesive.

This is in 2 is a sheetfed offset printing machine in the arrangement of the film rolls 8th . 9 and the leadership of the transfer film web 5 is indicated.

The sheetfed offset press is equipped with a feeder 105 for sheet feeding, printing units 106 and 107 to print colors on the sheet 133 and a coating plant 108 between the printing units 106 . 107 for coating the printed sheets 133 and the boom 100 for stacking the printed sheets 133 shown. The printsheet 133 be in the sheetfed offset press on impression cylinders 120 , Sheet transport drums 121 and a chain conveyor system 122 guided by grippers guided by all stations of processing and finally in the boom 100 placed on a pile. Shown is the minimal configuration of a sheetfed press. This can therefore contain more than two printing units and / or more than one coating unit, which can also be arranged in different order.

In the field of the path of sheet conveying with circulating on cylinders gripper systems within the sheetfed offset printing machine shown Laservor directions 109 to 114 in various alternative arrangements directly bow leading cylinders (impression cylinder 120 ) or drums (sheet transport drum 121 ) or gripper carriage systems (chain conveyor 122 ). Here can advantageously the laser devices 109 to 114 For labeling well focused on the previously in printing units 106 . 107 and / or coating plants 108 coated printing sheet 133 be steered, since the cylinders and drums usually have solid surfaces or the bow guide serving counter surfaces, which provides a good positioning of the sheet 133 enable. In the bow boom 100 can the assignment by means of suction in association with the chain conveyor 122 held sheet 133 respectively.

The arrangement of the laser devices 109 to 114 can be chosen so that several laser units are arranged across the width of the cylinder or drums. Then their distance to the respective required for the marking contact surface of the sheet 133 be chosen low, so that a small size can be achieved. The arrangement of the laser devices 109 to 114 but can also be chosen so that only one or two laser units are arranged across the width of the cylinder or drums. Then their distance to the respective required for the marking contact surface of the sheet 133 be chosen so large that a safe sweeping the entire sheet width is achieved in the marking.

This is in 3 the irradiation principle of a laser device by way of example on a counter-pressure cylinder 120 shown.

Analogously, the laser devices 109 to 114 (and also 115 to 117 , see below) on sheet transfer drums 121 , Chain conveyors 122 or on guides of transfer film webs 5 to be ordered.

The laser device consists of a laser unit 130 that optically with a scanner 131 connected is. As a scanner 131 acts an optical device for arbitrarily controllable, possibly periodic deflection of a laser beam 132 on an imaging area of a printed sheet 133 , This is also the focus of the laser beam 132 on the respective substrate (printed sheet 133 ) constantly adjusted according to the distance. From the laser unit 130 will laser light to the scanner 131 transferred from there as a controlled and possibly on the sheet 133 oscillating laser beam 132 radiated.

The scanner 131 is to a sufficiently large possibly adjustable distance above the sheet 133 carrying impression cylinder 120 arranged. This is the maximum required pendulum angle of the laser beam 132 in relation to the maximum possible width of the printed sheet 133 not too large so that the motion control is limited to acceptable speeds and the adjustment control can be optimized for focusing.

As a result of the movement of the laser beam 132 this can be as needed, the full width of the sheet 133 As a result of its pulsed irradiation, it scans and writes or processes the desired pattern on the surface into the corresponding surface areas.

When arranging a plurality of laser marking units side by side at a station for marking or editing the surface of the sheet 133 arise corresponding conditions, with the distance of the scanner 131 to the print sheet 133 then can be chosen correspondingly lower.

The printsheet 133 are doing one or more laser marking 109 to 114 exposed for processing. The laser marking devices 119 . 111 and 112 are counter-pressure cylinders 120 assigned to those the printed sheets 133 be guided safely. The laser marking device 110 is a sheet transport drum 121 assigned and irradiated the sheet 133 from the inside, with the printed sheet 133 on one of the sheet transport drums 121 opposite sheet guiding surface (Bogenführungsbahn) if necessary is pneumatically guided. Finally, the laser marking device 113 another chain conveyor 122 to the sheet delivery 100 assigned. Each of the mentioned laser marking devices 109 to 114 can be from one or more laser units 131 exist and can be variably and adjustably arranged on the respective sheet guiding element. This is every point of the sheet 133 during its transport through the printing press by means of a laser beam 132 irradiated. In this case, the sheet movement and speed in the movement of the laser beam for processing 132 included.

The assembly of the laser device 114 above the installation space of a boom 100 a sheet-fed printing machine allows a deflection of the laser beam over the entire width or parts of the sheet 133 with only small adjustment movements of the deflection optics or deflection optics (scanner) of the laser. Through quick, small movements of the deflection optics can write and mark work on the entire sheet 133 with one or only a few laser units in the laser device 114 be performed.

The arrangement closer to the printed sheet 133 makes larger travel paths and times necessary, so that in a complex marking the writing speed according to the current state of the art is not sufficient and therefore the number of laser units within the laser device 114 would have to be increased. The laser beam is widened and the line width thus wider. It is therefore also useful for quality reasons to cover the entire sheet width in a small time window.

The assignment of a laser marking arrangement 113 . 114 to the sheet delivery 100 a sheet-fed press has the advantage that the sheet 133 in the straight part of the sheet guide tracks is guided flat and can be fixed by the pneumatic working sheet guiding devices on this by negative pressure. Elaborate setup work and additional sheet guiding elements are not required in the inventive solution.

Additional set-up times are not incurred, since neither sheet guiding devices nor laser devices 109 to 114 equipped and cumbersome to be adjusted. The laser devices 109 to 114 are mounted in a fixed position and the desired marking point is driven by the movement of the laser optics for deflecting the laser beams. If you do not want to mark, the laser beams are off and will be turned on to the marker. Also, the laser beam can be deflected so that it prints the sheet 133 only hits if a mark is to be made.

The lasers can also be mounted on a slide or one or more Linearan drives, the laser across the machine width or possibly also in the XY direction over the sheet 133 method. However, these drives require special protection against dust and powder, as in bow arms 100 occurs. A fixed position high above the space of the sheet delivery 100 but ensures a low tendency to fouling. This also reduces the contamination of the laser optics. In the room, which closes the beam range of the laser, there is a slight overpressure, which can be generated by fans or blowers. This advantage also applies to the corresponding arrangement of the laser devices 109 to 114 at the printing 107 or coating plants 108 ,

The arrangement over the boom 100 requires as well as in the printing 107 or coating plants 108 for safety reasons, a shielding of the beam area of the laser relative to the environment in order to avoid leakage and possible deflection of the laser beam and contact of a machine operator with the laser beam. Such shielding may be accomplished by a metallic or polycarbonate sheath or other type of protective device suitable for laser absorption. The sheathing of the beam area should be designed such that disassembly or opening leads to immediate shutdown of the lasers. Access or access or opening of the protection of the boom (also at the pressure 107 or coating unit 108 as in 2 ) must also lead to a shutdown of the laser.

The laser beam (s) can interact with an IR-reactive or a UV-reactive material which has previously been applied to the substrate (printed sheet 133 ) was applied. Such a material may be an IR-reactive or a UV-reactive printing ink or a varnish, in which a volume change is brought about by the laser beam. The material may also be a printing ink or a varnish which has elements which are swellable under the action of heat and which leads to haptically sensible structures and / or color changes in the region which is swept by the laser beam.

In the devices according to 2 can z. B. a Braille font embossing are generated. As a coordinate-controlled, programmable system, the laser beam is capable of any pattern on the printed sheets to be processed 133 to write. Here, a kind of scanner system is provided. By pulsing the laser beam, a dotted pattern can be generated. The punctuation can then as well as a line pattern in any way a sheet 133 be attached.

Such a structure may be placed in further advance printing 107 or coating plants 108 be provided with a protective layer, such as a lacquer layer, so that it creates protected below this layer and thus more resistant. Such a structure generated by the laser beams on the printing sheet 133 can also be used after generation in further downstream printing 107 or coating plants 108 with a protective layer, e.g. B. a lacquer layer are provided so that the structure is effectively protected.

The laser itself may be a CO ₂ laser, a diode laser, an excimer laser or a YAG laser. Also suitable are fiber or disk lasers. In principle, however, any type of laser is suitable, which allows to work with suitable controls an inflatable layer (irradiate) without destroying them. The treatment by irradiation can trigger physical or chemical reactions in the corresponding layer.

The Processing takes place, for example, in IR-reactive systems by the action of heat, which leads to the swelling of the irradiated layer elements, while in UV-reactive systems triggering a chemical reaction for selective polymerization and thus leads to puffing of the irradiated layer elements.

It is thus a coordinate-controlled, programmable system, in particular a scanner system in conjunction with a laser beam source, provided. By pulsed driving the radiation source can easily individual points or lines in any order on the sheet 133 be generated. The desired tactile structures are by means of inflatable paint applied to the substrate or a corresponding lacquer or other suitable material, which is applied to the printed sheet before the printing process 133 may have been applied. The respective coating puffs up exactly where it is from a laser device 109 to 114 emitted laser radiation is contacted.

The inventive system of laser devices 109 to 114 can be completely flexible depending on the space available before, in or after printing 107 or coating unit 108 a printing press or in conjunction with a boom 100 the printing machine, in particular a sheet-fed offset printing machine are installed, in which a coating module 2 is integrated for the cold foil transfer. The laser devices 109 to 114 can then also the coating module 2 be advanced, added or subordinate. There is the possibility of the system to be generated by the structure (optically, metrologically detectable or haptic) by completely variable layer combinations to produce and z. Example, by means of a subsequently applied paint or lacquer layer to apply a protective film or to produce the structure in or below a previously applied coating of paint or lacquer or a transfer film coating.

Another arrangement according to the invention is in 4 For this purpose, a sheet-fed offset printing press with indicated coating module is provided 1 shown. The arrangement of the film rolls 8th . 9 and the leadership of the transfer film web 5 is indicated accordingly.

The sheetfed offset press is equipped with a feeder 105 provided for sheet feeding. printing units 106 . 107 for printing inks on printed sheets 133 and an optional unit 123 is between the printing units 106 . 107 and the boom 100 for stacking the printed sheets 133 shown. The optional unit 123 serves to further treat the coated printing sheet 133 , The printsheet 133 be in the sheetfed offset press on impression cylinders 120 , Sheet transport drums 121 and a chain conveyor system 122 guided by grippers guided by all stations of processing and finally in the boom 100 placed on a pile. As a special feature, the printed sheets 133 on grippers from the chain conveyor system 122 in the horizontal direction directly from a last impression cylinder 120 to the boom 100 transferred.

The last impression cylinder 120 is also associated with tooling or treatment equipment included in the attachment 123 can be attached, can also be used as a work platform.

Shown here is as in 2 a minimal configuration of a sheetfed press. A similar sheet-fed printing machine can therefore contain more than two printing units and / or more than one coating unit, which can also be arranged in different order.

This sheetfed press can be like that 2 be used as a conventional printing machine without film transfer device.

In this sheetfed press but can also, as in 2 is shown, film rolls 8th . 9 and a guide of the transfer film web 5 through the pressure gap 60 of the printing unit 107 be arranged. Then the printing unit 107 as a coating module 2 equipped for cold foil transfer.

In the area of the way of the sheet promotion with on the cylinders 120 . 121 Circumferential gripper systems within the illustrated sheet-fed offset printing press may include laser devices 109 to 111 and 115 to 117 in different alternative arrangements directly bow leading cylinders (impression cylinder 120 ) or drums (sheet transport drum 121 ) or gripper carriage systems (chain conveyor 122 ). Here can advantageously the laser devices 109 to 111 and 115 to 117 For labeling well focused on the previously in printing units 106 . 107 and / or the optional device 123 coated printing sheet 133 be steered, since the cylinders and drums usually have solid surfaces or the bow guide serving counter surfaces, which provides a good positioning of the sheet 133 enable. In the bow boom 100 can the assignment by means of suction in association with the chain conveyor 122 held sheet 133 respectively.

The arrangement of the laser devices 109 to 111 and 115 to 117 can be chosen as related to the 2 has been described.

The laser devices 109 to 111 serve (see description to 2 ) of the treatment of coated printed sheets 133 , Thus, by means of the laser device 109 one with glue in the first printing unit 106 (Commissioned 1 ) coated printed sheet 133 be aftertreated by drying the adhesive image or surface selectively or in total. Also, adhesive image or surface can be selectively or totally activated.

The laser devices 115 to 117 in particular serve the treatment of the transfer film 5 , This can be done by means of laser devices 116 and 117 from the top or the bottom of the transfer film web 5 respectively. Furthermore, the treatment of the applied film layer on the sheet 133 by means of a laser device 115 respectively. Here is the laser device 115 in a space 104 the additional device 103 attached and on the last impression cylinder 120 arranged sheet 133 directed.

The laser device 115 Can also be used in conjunction with a UV dryer or a conventional dryer in the field of additional equipment 103 or the transfer drum 121 before the last impression cylinder 120 to be ordered.

The treatment options extend to the extent described above. Thus, in particular when using the cold foil transfer to the printing unit 107 (Coating module 2 ) and in front of the boom 100 one or more printing or coating units (coating modules) may be provided to overlay the applied film image on the printing sheet 133 to apply even more color layers, gloss coatings or protective layers. These layers can then be provided by means of the laser devices provided in the region of the sheet transport 109 to 111 or 115 be treated as proposed.

The arrangement according to the invention of one or more of the laser devices can, for example, also instead of or in combination with the dryers 16 or the inspection device 17 in 1 respectively. This ensures a compact design.

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

Bahnspannungsüberwachungl

20

Web break monitoring

21

Druckzylinderblasvorrichtung

22

cylinder gap

23

cylinder gap

30

stabilizing device

40

Impression cylinder

41

Blanket cylinder

42

Blanket / blanket

43

plate cylinder

44

printing plate

45

setting device

46

setting device

50

printing unit

60

nip

80

Folienumlenkwalze

81

surface contour

82

surface contour

90

Folienumlenkwalze

DB1

pressure setting

DB2

pressure setting

100

boom a sheetfed press

102

space of the jib

103

space of the jib

104

space for additional equipment

105

investor

106

printing unit

107

printing unit

108

coating unit

109

laser device

110

laser device

111

laser device

112

laser device

113

laser device

114

laser device

115

laser device

116

laser device

117

laser device

120

Impression cylinder

121

Sheet guide drum

122

conveyor system

123

additional unit

130

laser unit

131

scanner

132

laser beam

133

sheet

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 0569520 B1 [0002]
• - DE 20303574 U1 [0003]

Claims (15)

Device in a sheet-fed printing machine with one or more printing units arranged one behind the other ( 106 . 107 ), with one or more of the printing units ( 106 . 107 ) upstream, intermediate or downstream coating units ( 108 ) and with a delivery pile having sheet delivery ( 100 ), whereby the printed sheets ( 133 ) within the sheet-fed printing machine in the course of the work process by means of conveyor systems on rotating gripper systems in the gripper closure guided by the printing units ( 106 . 107 ), Lackwerke ( 108 ) and the sheet delivery ( 100 ) and in the sheet delivery ( 100 ) are deposited on the delivery stack, for the transfer of imaging layers from a carrier film to printed sheets ( 133 ) at least with an applicator ( 1 ) for an image-wise coating of the printed sheets with an adhesive and with a coating module ( 2 ) for transferring the image forming layers from the carrier film to the printing sheet ( 133 ) in a transfer gap ( 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 feasible and the image-forming layers imagewise on the sheet ( 133 ) are transferable, 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, characterized in that the coating unit ( 2 ) for carrying out the film transfer at least one device ( 109 to 114 ) for the laser treatment of the substrate and / or the adhesive coating and / or the transfer film and / or a printing ink and / or a lacquer coating before and / or after and / or assigned. Device according to claim 1, characterized in that the transfer film ( 5 ) is divided into one or more Teilfolienbahnen lesser width and that the Teilfolienbahnen positioned or next to each other the transfer nip ( 6 ). Apparatus according to claim 1, characterized in that before a printing process or in one or more printing units ( 107 ) and / or coating plants ( 108 ) the sheet-fed printing machine by radiation discolored, erodible or expandable pressure layers on the sheet ( 133 ) and that one or more laser marking devices ( 119 to 114 ) arranged on or through the conveyor system (s) ( 120 . 121 . 122 ) supported sheet ( 133 ) acts in such a way that on the printed sheet ( 133 ) optical, measurable or haptic patterns are produced in or in connection with a transfer film coating. Apparatus according to claim 1, characterized in that the conveyor system of corresponding to the number of printing units arranged counter-pressure cylinders ( 120 ) and sheet transport drums ( 121 ) and that the laser marking devices ( 109 to 112 ) one or more impression cylinders ( 120 ) or sheet transport drums ( 121 ) are upstream, downstream or downstream. Apparatus according to claim 1, characterized in that the conveyor system off with the sheet delivery ( 100 ), the printed sheets ( 133 ) carrying rotating gripper systems ( 122 ) by means of which the printed sheets ( 133 ) can be deposited in the gripper closure on a delivery pile, wherein the sheet delivery ( 100 ) an upwardly closed space ( 102 ), which covers the area of the conveyor system ( 122 ) and that the laser marking devices ( 113 . 114 ) in conjunction with the sheet delivery ( 100 ) or that the laser marking devices ( 109 to 1114 ) of a conveyor ( 120 . 121 . 122 ) are assigned in such a way that they are used to convey the printed sheets ( 133 ) in a defined position relative to the respective laser marking device ( 109 to 114 ) is equipped. Apparatus according to claim 3 to 5, characterized in that the conveyor means an impression cylinder ( 20 ) or a full-surface sheet transport drum ( 21 ) or a sheet guide track or a sheet tightening device. Device according to Claims 1 to 6, characterized a sheet-fed press according to the principle of offset printing or of flexographic printing or gravure printing or screen printing becomes. Device according to claims 1 to 7, characterized in that each laser device ( 109 to 114 ) one or more laser units ( 130 ) as a CO2 laser and / or excimer laser and / or YAG laser and / or diode laser and / or a laser of other types, which is suitable for the selective irradiation of a changeable layer. Apparatus according to claim 7, characterized in that each laser device ( 109 to 114 ) one or more scanners ( 131 ) by means of which one of the laser unit ( 130 ) generated laser beam ( 132 ) with respect to a sheet to be irradiated ( 133 ) including the sheet movement at any point of the surface of the sheet ( 133 ) is controllable and focusable. Apparatus according to claim 1 to 8, characterized in that the marking on the Printed sheet ( 133 ) is carried out by the local laser flattening of inflation elements contained in the ink or lacquer layer by the laser or that the marking on the printed sheet ( 33 ) takes place by optical change and / or embossing of the surface by local variation of components contained in the printing ink or lacquer layer or the film layer. Apparatus according to claim 8 to 10, characterized in that the local change by an impact by physical means and / or by the action of heat and / or by irradiation of an IR-reactive layer by means of a laser takes place with a high proportion of IR light and / or by an action chemically, as by polymerization. Device according to claim 11, characterized in that that the flatulence by irradiation of a UV-reactive layer by means of a laser with a high proportion of UV light. Apparatus according to claim 1 to 12, characterized in that the surface provided with markings sealed or coated. Device according to Claims 1 to 13, characterized in that the laser devices ( 109 to 114 ) are controllable such that the markings in a coating or a layer lying below the coating or a sealing or protective coating applied to the coating above the coating form ( 133 ), wherein at least the coating is a film coating covering the substrate imagewise or over the entire surface. Device according to claim 14, characterized in that laser devices ( 109 to 114 ) are controllable in such a way that the markings in the coating and / or the layer lying below the coating and / or the seal or protective coating of the printing sheet applied above the coating ( 133 ) is introduced for the optical or measurable or haptic change of one or more of the layers in combination or interaction with each other, wherein at least the coating is a film coating covering the surface imagewise or over the entire surface.