JP2007276465A - Apparatus for embossing foil printing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus incorporating embossing foil printing which can pliably utilize a printing machine. <P>SOLUTION: An adhesive bond is applied as a streak portion on a sheet, and a streak portion providing layer is transferred from a carrier foil to the sheet. In order to improve flexibility at the time of utilizing within the printing machine, a foil coating machine having a foil transfer module F composing a varnishing module as a base and at least one varnishing module L is used. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an embossing foil printing apparatus in a foil coating module, which includes an apparatus for transferring an image area providing layer from a carrier foil to a sheet.

It is known to produce a metal layer on a sheet by a foil transfer method. Patent Document 1 describes one printing material and a printing apparatus using the printing material. In this document, a sheet processing machine including a paper feeding device and a paper discharging device is described. However, a plurality of printing devices and one foil coating device are provided between the paper feeding device and the paper discharging device. Has been placed. In at least one of these printing apparatuses, an adhesive pattern is applied by a lithographic printing method. This adhesive pattern is one specific pattern provided by the cold press method that provides an image portion. A foil guide is provided in the foil coating apparatus having an impression cylinder and a transfer cylinder located next to the printing apparatus. In the foil guide, a foil strip or a transfer foil is transferred from the foil roll to the impression cylinder and the transfer cylinder. Led to the printing gap between. The foil strip is wound up again on the discharge side after leaving the foil coating apparatus. The transfer foil has a carrier layer, and an image area providing layer such as an aluminum metal layer can be placed on the carrier layer.
When the sheet is transported in the printing apparatus, an adhesive pattern is applied to each sheet and brought into contact with the foil material. At this time, the metal layer facing downward is in strong contact with the adhesive adhesion region on the sheet. By transporting the sheet further, this metal layer adheres only to the area of the pattern to which the adhesive has been applied. The sheet is discharged in a foil-coated state.
It is known to incorporate such a foil coating device into, for example, a printing device of a printing press. In this case, however, the printing apparatus cannot be used for image printing. Moreover, the cost for changing the printing apparatus is high.
Further, from Patent Document 2, an apparatus for emboss foil printing is known. In this apparatus, for example, a varnish module of a sheet printing machine is used as a unit for incorporating a foil transfer module. Since the foil transfer module contains all the elements for foil transfer, it is difficult to access or only a small foil roll can be used.
European Patent No. 0659520 German Patent Application Publication No. 102005008940

  Accordingly, it is an object of the present invention to provide an apparatus that can incorporate embossed foil printing while allowing flexible use of the printing press.

  This problem can be solved by the features of claim 1.

  Preferably, the transfer foil is brought into contact with the substrate by the transfer cylinder on the impression cylinder, preferably in at least one foil transfer module that is placed after the at least one varnishing module of the foil coating machine.

  In a sheet processing machine with a foil transfer module, the foil coating apparatus is preferably placed at the end of the sheet processing machine. This can particularly simplify the machine configuration.

  In one development of the invention, one more varnishing module and one printing device can be connected to the foil transfer module to perform more difficult foil coating operations.

  Furthermore, a printing device configured as a sheet transport unit can be connected to the foil transfer module after the adhesive coating varnish module. Thereby, the physical distribution management of the foil can be established in this printing apparatus that does not have an inking device or a dampening device.

  Other preferred embodiments of the invention can be seen from the dependent claims.

Hereinafter, the present invention will be described in more detail with reference to the drawings.
In FIG. 1, a varnishing module L is placed in front of the foil transfer module F. Immediately before the varnishing module L, the printing apparatus D can be placed in front.

  A cut rubber blanket or flexographic printing plate is attached to the plate cylinder 11 of the varnishing module L placed in front of the foil transfer module F. In this embodiment, the varnish module functions as a device for applying an adhesive. For this reason, the chamber doctor blade system as the metering system 13 applies an adhesive onto the substrate via the anilox roller or the form roller 13 and the plate cylinder 11. The printed material to which the adhesive has been applied is sent to a foil transfer module F which is a foil coating module placed later.

When converting the varnish module L to the foil transfer module F, an anilox roller and a chamber doctor blade system are added. The plate cylinder functions as a transfer cylinder 21 for the transfer foil 24. For this reason, at least a new foil stock roll 22 for the transfer foil 24 and a foil collection roll 23 for the used transfer foil are allocated to the transfer cylinder 21. The transfer cylinder 21 transfers the image area providing layer from the transfer foil 24 onto the printed material attached to the gripper of the impression cylinder 4 in the transfer gap 6 between the transfer cylinder 21 and the impression cylinder 4.
If necessary, a calendar roller 31 is placed on the transfer cylinder 21 in contact with the impression cylinder 4 in the transport direction. The calendar roller 31 can be configured as an embossing roller.

  For example, in the case of special use such that the water absorption of the printing material is very high and the adhesive penetrates into the printing material in a short time, the base coat is formed in the printing device D placed in front of the varnishing module L. The first layer can be applied with an adhesive such as

In the apparatus for performing embossed foil printing in this figure, a foil stock roll 22 is assigned to each foil transfer module F on the sheet supply side. The foil stock roll 22 is provided with a rotation driving device. This rotational driving device is controllable because it is necessary to supply the foil web 24 of the transfer foil that has not been used to the foil transfer module F while continuously controlling it.
Furthermore, a tension roller 25 can be provided in the region of the foil guide. The tension roller 25 is disposed near the transfer cylinder 21 when the foil web 24 is supplied to the transfer gap 6 and discharged from the transfer gap 6. By using such a tension roller 25, the foil web 24 of the transfer foil can hold the position with respect to the transfer cylinder 21 more reliably.

  Preferably, the tension roller 25 is arranged near the transfer gap 6 so that the foil web 24 is guided in the transfer gap 6 in a substantially tangential direction with respect to the surface of the transfer cylinder 21. By guiding the foil web 24 in such a tangential direction, the contact area between the foil web 24 and the surface of the transfer cylinder 21 can be greatly minimized. The friction between can be reduced.

  After the transfer foil is transferred onto the substrate, then after applying pressure and gloss as necessary, the conventional offset printing ink, alternatively so-called UV ink, is applied onto the foil remaining on the substrate. Can be used for additional printing or overprinting and / or coating of the image area providing layer of the transfer foil, for example UV coating using an excimer dryer.

  For this purpose, another varnishing module can be placed behind the foil transfer module F. For example, the gloss can be further enhanced by applying an additional coating to the image area providing layer of the transfer foil.

  In this regard, a plurality of configurations of a foil coating machine for embossed foil printing will be described below.

FIG. 2 shows a basic form of a foil coating machine. This machine is provided with a paper feeding device AN equipped with a paper feeding device pile ANS. The paper feeding device AN incorporates known devices necessary for supplying the substrate to the foil coating machine.
Moreover, in order to apply | coat an adhesive agent, the varnishing module L provided with the metering apparatus for coating agents is provided.
The varnish module L is followed by a foil transfer module F that performs embossed foil printing. In this figure, the foil transfer module F is shown in the same basic configuration as the varnishing module L.
Further, a paper discharge device AU is provided, and the sheet coated with foil can be discharged onto the paper discharge device pile AUS by this paper discharge device.
By using such a foil coating machine, embossing foil printing can be performed in a so-called off-line operation, and the function of the printing machine is not limited thereby. Furthermore, by using this machine, a foil coating can be applied to a printed sheet or a pre-coated sheet, and an embossed foil layer is suitably attached to the surface of the sheet, Therefore, a good gloss effect can be obtained.

FIG. 3 illustrates an application of the foil coating machine of FIG. The machine shown in FIG. 3 is also provided with a paper feeding device AN and a paper delivery device AU. However, here, the varnishing module L for applying the adhesive is placed behind the printing device D.
The varnish module L is followed by a foil transfer module F that performs embossed foil printing.
According to this foil coating machine, it is possible to perform preliminary processing on a sheet to which foil coating is applied by emboss foil printing, for example, in a printing apparatus D configured as an offset printing apparatus. This is useful to protect pre-coated sheets or printed sheets when protecting their surfaces or to prepare for embossed foil coating. Similarly, pre-coating can be performed to improve adhesion of the adhesive to untreated sheets, sometimes made of highly water-absorbing materials.
The printing device D can be configured for various printing methods or foil coating methods, and process steps such as printing, foil coating, and physical processing can be performed in the printing device.

FIG. 4 illustrates another application of the foil coating machine. In the embodiment of this figure, as in the case of the embodiment of FIG. 3, a paper feeding device AN, a paper ejection device AU, an adhesive coating varnish module L, a printing device D, and a foil transfer module F are provided. ing.
However, in this figure, the printing device D is configured as a support for the foil rolls 22,23. For this reason, this printing apparatus is not provided with an inking device or a dampening device, but is completely equipped with a sheet guide function. The transfer foil 24 is guided from the foil roll 22 to the foil transfer module F as described above, and then returned to the foil roll 23.
This arrangement is so compact that it can accommodate larger foil rolls than in the variations of FIGS. Further, the handling of the foil when the roll is changed and when the foil web is pulled into the foil transfer module F can be solved more ergonomically.
By using the printing apparatus D, an intermediate step after applying the adhesive can be executed. Intermediate steps include a drying process or mechanical processing of the sheet. For this purpose, the printing device D is equipped with a dryer or is prepared to be able to incorporate a device for the hierarchical processing of sheets.

FIG. 5 shows another form of foil coating machine based on the embodiment shown in FIG. In this embodiment, the sheet feeding device AN, the sheet discharging device AU, the varnishing module L for applying an adhesive, the foil transfer module F placed behind the varnishing module, and the other placed behind the foil transfer module. One varnishing module L is provided.
By using such a foil coating machine, it is possible to perform embossing foil printing on a sheet of paper in an off-line operation, i.e. disconnected from the printing press, and to perform another coating in a subsequent process step. Additional coatings include glossy coatings, protective coatings, or coatings with a color effect. Moreover, the effect which the outline which was produced | generated physically or was produced | generated by layer adhesion can be given to the surface of a to-be-printed material.

FIG. 3 is a view of an apparatus for transferring a foil in a varnishing module. 1 is a first foil coating machine with a foil transfer module. 2 is a second foil coating machine with a foil transfer module. FIG. 3 is a third foil coating machine with a foil transfer module. 4 is a fourth foil coating machine with a foil transfer module.

Explanation of symbols

4 Impression cylinder 6 Transfer gap 11 Plate cylinder 12 Forming roller 13 Metering system 21 Transfer cylinder 22 Foil stock roll 23 Foil collection roll 24 Foil web 25 Tension roller 31 Calendar roll

F foil transfer module D printing device L varnishing module AN paper feeding device AU paper delivery device

Claims (11)

An apparatus for embossing foil printing on a sheet of paper,
At least one application device for coating the sheet paper with an adhesive according to the image area;
A foil coating device for transferring the image area providing layer from the transfer foil to the sheet,
With
The foil coating apparatus includes an impression cylinder and a transfer cylinder,
The transfer foil can be guided around the transfer cylinder, so that the image line providing layer is applied to the sheet in the area coated with the adhesive in line with the image line area to which the adhesive is applied. Adhere and peel off the transfer foil,
The foil coating machine includes a foil transfer module (F) for embossed foil printing,
The foil coating machine includes at least two working units in the form of a varnishing module (L) configured for a paper feeder (AN), a paper ejector (AU), and a sheet processing machine. A device characterized by being.   A varnishing module (L) for applying an adhesive is placed behind the paper feeder (AN), and the varnishing module includes a foil transfer module (based on a varnishing module having at least one plate cylinder). Device according to claim 1, characterized in that F) is rearranged.   The paper feeding device (AN) is followed by a printing device (D), the printing device is further provided with an adhesive coating varnishing module (L), and the varnishing module includes 2. A device according to claim 1, wherein a foil transfer module (F) based on a varnishing module comprising at least one plate cylinder is followed.   The apparatus according to claim 3, wherein the printing apparatus is an offset printing apparatus.   The paper feeding device (AN) is followed by a printing device (D), the printing device is further provided with an adhesive coating varnishing module (L), and the varnishing module includes 2. A device according to claim 1, wherein a foil transfer module (F) based on a varnishing module comprising at least one plate cylinder is followed.   A varnishing module (L) for applying adhesive is placed behind the paper feeding device (AN), and a printing device (D) is placed behind the varnishing module. 2. A device according to claim 1, wherein a foil transfer module (F) based on a varnishing module comprising at least one plate cylinder is followed.   7. The apparatus according to claim 6, wherein the printing device (D) is provided with a sheet guide device, a sheet processing device, and a device for accommodating a foil roll.   8. The device according to claim 7, wherein the printing device (D) is provided with a drying device and / or a device for mechanically processing the sheet.   The paper feeding device (AN) is followed by a varnishing module (L) for applying an adhesive. The varnishing module includes a foil transfer module (based on a varnishing module having at least one plate cylinder). The apparatus according to claim 1, characterized in that F) is post-placed and the foil transfer module is post-placed with a further varnishing module (L).   In the foil transfer module (F), a form roller and a metering system are detachably arranged from the plate cylinder, and the plate cylinder is attached to the transfer cylinder (21) by using a smooth and compressible press cover. Device according to any one of the preceding claims, characterized in that it can be converted.   The press cover is a tension member carried on the transfer cylinder (21) or on the transfer cylinder (21) as a surface element covering the surface of a part of the cylindrical surface area of the transfer cylinder (21) of the foil transfer module (F). 11. The apparatus of claim 10, wherein the apparatus is positionably mountable on the top.

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