DE102008057006B4 - Process for hot lamination of sheet material and laminating film, laminating film set and laminator for performing the method - Google Patents

Abstract

Method for hot laminating sheet material and laminating film (21, 22, 23) by means of a laminating device (1) designed as an office device, in which sheet material and laminating film (21, 22, 23) are folded together and the combination thus formed is introduced into the laminating device (1) , where the combination is welded together under the action of pressure and elevated temperature and with adaptation of the temperature and / or the throughput speed to the thickness and / or the material of the laminating film (21, 22, 23), characterized in that a laminating film (21 , 22, 23) whose initial roughness is greater on at least one side than the final roughness after lamination, that the laminating film (21, 22, 23) is provided on this at least one side with a marking in the form of a surface pattern, the surface areas (27, 28, 29), the roughness of which is less than the initial roughness but not less than the final roughness, the mark being from em sensor (20) of the laminating device (1) that the laminating film (21, 22, ...

Description

The invention relates to a process for hot lamination of sheet material according to the preamble of claim 1, a laminating film suitable for the process according to the preamble of claim 12, a laminating film set according to the preamble of claim 21, a laminating apparatus according to the preamble of claim 22 and a laminating system of laminating apparatus and laminating film set according to claim 32.

For the protection of sheet material, in particular of valuable documents, it is known to weld the sheet material with a laminating film. This happens in the non-industrial area, ie in the office and private sector, with the help of usually designed as a tabletop laminators. Such laminators are for example from the DE 20 2005 005 020 U1 and - in combination with a cutting device - from the EP 1 724 111 A2 known. They have essentially the same structure, ie a housing in which a laminating device is arranged. Between a feed opening on one side and an outlet opening on the other side of the housing extends through the housing a passage channel, which is associated with the laminator. The latter usually has at least one pair of rollers, in some cases also a plurality of pairs of rollers, each consisting of two stacked laminating rollers forming a laminating gap, wherein the laminating gap is adjusted such that the combination of sheet material and laminating film is subjected to considerable pressure in the laminating gap. In Heißlaminiergeräten at least one of the laminating rollers, usually both, heated, so that the combination of sheet material and laminating film is also heated in addition. During the passage, the laminating films stick together with the sheet material to be welded.

As a rule, the sheet material is welded between two film sheets forming a laminating film. These may be loose foil sheets or foil webs which are rolled up inside the laminating apparatus and are pulled off the rollers during the lamination process, the singling being effected by means of cutting devices (cf. US 2004/0050500 A1 ). Instead, however, the two foil sheets can also be present in the form of a laminating foil bag, in which the two foil sheets are connected to one another at at least one side edge. Such laminating films are for example from DE 197 44 595 A1 and the DE 201 00 328 U1 known. The foil sheets are formed as composite films in which a transparent, clear film of z. As polyethylene or polypropylene is provided with a heat-sensitive adhesive layer, which consists for example of EVA (ethylene-vinyl acetate copolymer) (see. DE 600 29 505 T2 ).

Currently laminating films in a thickness of 30 microns to 500 microns on the market. By selecting the film thickness, the laminated sheet material can be given a desired flexibility or rigidity. It goes without saying that more heat energy has to be expended for the welding of thick laminating foils than for the welding of thin laminating foils of the same material. Laminating devices which are intended for the processing of laminating films of different thicknesses must therefore be able to be adapted to the thickness of the respective laminating film to be processed in such a way that sufficient thermal energy is made available for the welding of the sheet material, but on the other hand the laminating film does not overheat and thus is damaged. Such laminators therefore have adjusting devices with which the temperature of the laminating device and / or the throughput speed can be adapted to the respective thickness of the laminating film by hand.

In practice, however, it has been found that there are always incorrect operations, especially when - as in larger offices - a large number of people have access to a laminator. The result of incorrect operation is that lamination is insufficient if the heat is too low, the laminated sheet material is not sufficiently protected, or if too much heat overheats the laminating film and thereby sticks the laminating film to the laminating rollers, which results in destruction of the laminating apparatus , In addition, the laminated sheet material is damaged to unreadability. The latter condition is usually irreparable and in the worst case the destruction of the document is the same.

In the DE 100 04 486 A1 a cartridge laminator is disclosed, in which a control and / or regulating device is provided, by means of which detected by a sensor properties of the respective laminar coating laminar influencing actuators, such as the heater for setting a specific lamination temperature and / or a drive device for Setting a certain lamination speed and / or a pressing device for setting a specific lamination can be controlled. For this purpose, a roll film cartridge has a machine-readable coding strip on its outer surface, for example a conventional bar code strip. Alternatively, the coding can also be attached directly to the roll film and z. Example, be detected by a window in the cartridge wall or at one of the output slot projecting end of the roll film. As conceivable also stated that the roll film cartridge or the Roll film is provided with a mechanically detectable mark, which can be scanned by a button and into an electrical sensor signal that can be transmitted to the control unit.

The invention has for its object to provide a method of the generic type for hot lamination of sheet material, with the incorrect operation of the laminator when using laminating films of different thickness - or even different material - reduced or completely avoided. Further objects are to provide a laminating film suitable for the process or a laminating film set consisting of a plurality of such laminating films, a laminating device specially designed for this purpose, and a system of laminating device and laminating film set.

The object relating to the method is achieved according to the invention by using a laminating film whose initial roughness on at least one side is greater than the final roughness after lamination, so that the laminating film is provided on this at least one side with a marking in the form of a surface pattern having surface areas whose roughness is less than the initial roughness but not less than the final roughness, the mark being readable by a sensor of the laminator, the laminating film being passed by its mark on the sensor, the sensor reading the mark and generates a characteristic signal for the marking, and the temperature and / or the passage speed is adjusted in response to the signal.

The basic idea of the invention is to provide a method in which the laminating film is provided with a marking which identifies its thickness and / or its material, and this laminating film is used in conjunction with a laminating apparatus which has a sensor for reading out the marking and for producing a label has the mark characteristic signal, wherein the temperature and / or the passage speed is set in dependence on the respectively read mark or the signal generated by the sensor. In principle, it is possible to use the signal for a display, on the basis of which the operator sets the temperature and / or the passage speed according to the display via a corresponding input interface. In this case, the display can represent a code or the temperature and / or flow rate to be set. As a result, the risk of incorrect operation is significantly reduced. It is completely ruled out if the signal generated by the sensor is passed on to a control device for automatically setting the temperature and / or the throughput speed. In this method, no manual intervention takes place. The lamination result is flawless regardless of the thickness and / or material of the laminator film, and erroneous operations can no longer occur.

In the method according to the invention, a laminating film is used, the initial roughness on at least one side is greater than the final roughness after lamination, wherein the laminating film is provided on this at least one side with a surface pattern as a marker having surface areas whose roughness of the Initial roughness differs so that it is less than the initial roughness, but not less than the final roughness. The starting point is therefore a laminating film known per se, in which at least one side has an initial roughness, which is generally so great that the laminating film is dull or opaque, that is, at best translucent. The reason for this design is to reduce the adhesion of laminating films or sheets of film of a laminating film to each other due to static electricity. As a rule, the initial roughness is caused by the applied adhesive. For the method according to the invention, this equipment of the laminating film is used in such a way that on the side provided with the initial roughness a surface pattern is provided, preferably by smoothing of certain surface areas, which is then scanned by the sensor. The advantage of this type of marking is that the surface pattern disappears during the lamination process, that is no longer recognizable on the laminated end product, since the surfaces with the initial roughness - usually the adhesive layer - and possibly also the surface areas of the surface pattern are melted so that the page in question is evenly smooth over its entire surface and therefore evenly transparent.

There are really no restrictions on the type and extent of the surface design. There should be such a contrast between the surface areas and the initial roughness that it is detectable by the sensor, preferably in that the surface areas of the surface patterns are already smoothed so that they have the final roughness after the lamination process. Very easy to produce markings in which the surface areas are formed as straight, parallel and spaced extending line areas. In this way, the distance and / or the width and / or the number of line regions can be scanned. The preparation of the line areas is done in a simple manner in that the laminating film is first provided on the surface provided for this purpose surface with the initial roughness and is then guided over rollers that the Create line areas by smoothing the initial roughness.

The line areas can be limited in their extent to the area that is detected by the sensor. For manufacturing reasons, however, it is expedient to extend the line regions over the entire width or length of the laminating film. For a good readout of the line regions, it is also advantageous if the line regions extend transversely to the intended continuous movement through the laminator. Depending on the orientation of the readout direction of the sensor, however, the line regions may also extend obliquely to the continuous movement or also parallel thereto.

The differentiation of the laminating film with regard to its thickness and / or its material can be done in the formation of surface areas as line areas, that the distance and / or the width of the line areas is made larger, the thicker or thinner the laminating film. In this case, the differentiation can take place solely via the distance or solely over the width of the line regions, but also by differentiation both by different distances and different widths of the line regions. Thus, the thicker or thinner the laminating film, the greater the spacing of the line regions and the narrower the width of the line regions.

In principle, the method according to the invention can also be carried out using film webs rolled up on rolls, the rolls being arranged inside the laminating device. They are then brought together in the laminator, including the sheet material to be welded. The separation then happens after the lamination process by means of a cutting device.

In a manner known per se, however, laminating films which consist of a pair of film sheets, between which the sheet material is then inserted, should also be used in the process according to the invention. In this way, the sheet material is protected on both sides by the laminating film. At the same time, as is likewise known in the prior art, at least one foil sheet, preferably both foil sheets, should have the initial roughness on the side facing the other foil sheet, ie be matt or opaque. In this way, the foil sheets for the insertion of the sheet material can be better separated from each other. Laminating films should preferably be used whose foil sheets are connected to one another at at least one edge, so that it is ensured that they overlap one another over the entire surface and flush with the edge during the lamination process (cf. DE 197 44 595 A1 and DE 201 00 328 U1 ). As a rule, it is sufficient if only one of the two foil sheets is provided with the marking.

To read the mark, an optical sensor can be used. Laser sensors, in particular laser scanners, which scan the marking over a specific distance or a predetermined angle, are suitable for this purpose.

In order to be able to process the widest possible range of laminating film thicknesses, the laminating gap through which the combination of laminating film and sheet material is guided for impressing the print should be adjustable, it being provided according to the invention that the signal generated by the laser is then also used for this purpose is to adjust the height of the lamination, be it that the setting is done in response to a display of the signal by hand or automatically via the aforementioned control device.

The object relating to the laminating film itself is achieved according to the invention in that the laminating film has an initial roughness on at least one side, which makes the laminating films opaque or opaque, and in that the laminating film has a marking on the matt side in the form of a surface pattern with surface areas whose roughness differs from the initial roughness so that it is less than the initial roughness. The surface pattern can be scanned by a sensor associated with a laminator, as is also the subject of the present invention. In this case, the surface pattern can be differentially adapted to the respective thickness and / or the respective material of the laminating film, d. H. Each thickness or each material can be assigned a characteristic surface pattern. In particular, the laminating film may be formed as described above in detail in connection with the method according to the invention.

The invention also provides a laminating film set with laminating foils of different thicknesses and / or different materials, the laminating foils bearing a marking characteristic of their thickness and / or their material in the form of a surface pattern having surface areas on the matt side or at least one of the matt sides, whose roughness deviates from the initial roughness.

With regard to the laminating apparatus, the object relating thereto is achieved according to the invention in that the laminating apparatus has a sensor which is suitable for reading out a marking in the form of a surface pattern on the laminating film which has areas whose initial roughness is greater on at least one side of the laminating film is as the final roughness after the Laminating, and wherein the surface pattern surface area, the roughness of which is less than the initial roughness, but not less than the final roughness, wherein the sensor in response to the read-out mark generates a signal for a display device and / or for a control device with the lamination and / or the transport device and is configured such that the control device adjusts the temperature of the laminating device and / or the passage speed of the transport device in dependence on the read-out marking. The basic idea is also to create the prerequisite for an adaptation of the temperature and / or the throughput speed to the laminating film used in each case and thereby to use a sensor which is able to read different markings in the form of the above-described surface areas of a surface pattern according to specific criteria , wherein the surface areas differ in their roughness from the initial roughness of the laminating film, for example by counting line areas over a specific read-out distance or distances, etc. In this case, the criterion is the number and / or the distance of the line areas.

The invention relates to two variants of the laminator. In one variant, the signal generated in each case is displayed, for example in the form of a code or as an indication of the thickness of the laminating or as an indication of the temperature and / or flow rate to be set, the operator then the temperature and / or the flow rate with the at the existing devices already prescribes adjusting device. In the second, preferred variant, the signal is used to control a control device, via which the temperature and / or the passage speed is automatically adjusted according to the signal or the marking on the laminating film, so that in this respect no manual intervention is required. It is understood that both variants can also be combined with each other, d. H. that even with the automatic variant, an indication of the laminating film thickness, the temperature and / or the throughput speed takes place as pure information to the operator.

In the embodiment of the laminating device according to the invention, it is provided that the laminating device has at least one pair of rollers with two laminating rollers forming a laminating gap, of which at least one is heatable by means of a heating device, preferably both. In this case, at least one of the laminating rollers should be part of the transport device, in which case the transport device has an electric drive, via which the laminating rollers are rotatable or are and which is connected to the control device.

It is expedient if the sensor for reading the marking in the direction of passage is arranged in front of the laminating device, so that the marking is read out before reaching the laminating device and then the laminating device is adjusted in terms of temperature and throughput speed before the combination of laminating film and sheet material has reached the laminating device , An expedient embodiment is provided when the sensor is arranged outside the housing, preferably in such a way that a sheet support is provided on the housing as a continuation of the passage channel beyond the feed opening, in which case the sensor is associated with the sheet support, which is expediently integrated in the sheet support , This opens the possibility to convert existing laminators in a simple way.

As mentioned above, the sensor is above all an optical sensor and here primarily a laser scanner in question. The laser should be able to read areas of different reflections and / or absorption.

According to a further feature of the invention it is provided that the sensor is guided transversely to the passage direction in the passage channel movable. In a laminating machine, which has two movable side stops in a conventional manner for the centric introduction of the laminating in the flow channel, this can for example be realized that the sensor is connected to one of the two side stops, so that when adjusting the side stops to the format the laminating film automatically correct assignment of the sensor takes place.

In order for the laminator also to be suitable for a wide range of laminating film thicknesses, the height of the laminating nip produced by the laminating device should be adjustable in dependence on the signal from the sensor or adjusted automatically via the control device. In this way, the pressure acting on the laminating film can be kept within an optimum range, regardless of the thickness of the laminating film.

The last part of the object is achieved according to the invention by a laminating system comprising a laminating device and a laminating film set of different thicknesses and / or different materials, wherein the laminating device, as specified above, is formed and wherein the laminating film set laminating with at least one for their respective thickness and / or has their respective material characterizing marking in the form described above. Laminator and laminating are adjusted so that the laminator is able to read with the help of the sensor, the respective marking on the laminating the laminating film set and depending on the selected mark to generate a display and / or automatically the temperature and / or flow rate in the laminator so to ensure that an optimal lamination process is obtained and the finished lamination product is of high quality.

In the drawing, the invention with reference to an embodiment is illustrated in more detail. Show it:

1 an oblique view of the back of the laminating apparatus according to the invention;

2 the laminator according to 1 in cross-section;

3 an oblique view of the front of the laminating according to the 1 and 2 with three laminating films of different thickness and

4 an oblique view of the front and top of the laminating according to the 1 to 3 with continuous laminating film.

The laminating device shown in the drawing 1 has a housing 2 with a flat case back 3 , a front wall 4 , a back wall 5 and one the front wall 4 and the back wall 5 connecting, arc-shaped top wall 6 , The latter is with a variety of cooling slots - exemplified with 7 designated - provided.

From the back wall 5 to the front wall 4 extends through the housing 2 an obliquely downwardly directed passage channel 8th in such a width that DIN A4 sheet material can be passed through landscape format. The flow channel 8th is the input side through a feed opening 9 in the back wall 5 and an exit opening 10 in the front wall 4 limited.

Approximately in the middle of the flow channel 8th there is a laminator 11 , of which here two superimposed and with their axes of rotation parallel to each other laminating rollers 12 . 13 you can see. The laminating rollers 12 . 13 extend over the entire width of the flow channel 8th and form a laminating gap between them 14 out. The laminating rollers 12 . 13 are heated so that they can be heated to temperatures between 80 ° C and 140 ° C. They are also part of a transport device to which an electric motor, not shown here drive belongs, the two laminating rollers 12 . 13 synchronously drives, the upper laminating roller 12 clockwise and the bottom laminating roller 13 counterclockwise. Their peripheral speeds are identical.

At the back wall 5 attached is a sheet pad 15 whose top 16 flush with the bottom of the flow channel 8th connects and inclined in the same direction is again pass channel 8th itself. Adjacent to the feed opening 9 protrude over the top 16 the sheet pad 15 In addition, two guide bars 17 . 18 , which face each other and which are movable in opposite directions due to mechanical coupling in such a way that in an adjustment, the center of the distance between the two does not shift. The distance between the guide webs 17 . 18 is so adaptable to the format of each laminating combination of laminating film and sheet material that both side edges of this combination when inserted into the flow channel 8th through the guide bars 17 . 18 are guided and the laminating film centric in the flow channel 8th enters.

Adjacent to the guide bar 18 is in the sheet pad 15 a rectangular recess 19 provided below a laser scanner 20 at the bottom of the sheet pad 15 is mounted such that its laser window up through the recess 19 is directed. In this way, one of the laser scanner 20 generated laser beam through the recess 19 shine upwards. The laser scanner 20 is with the adjacent guide bar 18 connected so that it moves the guide bar 18 moves with his position so in relation to this guide bar 18 not changed.

The laser scanner 20 is with one in the housing 2 accommodated control device connected to the laser scanner 20 received signals by means of suitable software in control of the speed of the laminating rollers 12 . 13 and / or converts the heating power. For this purpose, the control device with a speed control of the drive and / or with a temperature control of the heater for the laminating rollers 12 . 13 connected.

The height of the laminating gap 14 ie the free distance between the two laminating rollers 12 . 13 , is by vertically moving the upper laminating roller 12 adjustable. For this purpose, an electric motor drive is present, which is also connected to the above-mentioned control device in such a way that over them, the gap height of the laminating 14 depending on the laser scanner 20 signal is set.

In 3 are spaced above each other three laminating films 21 . 22 . 23 shown, wherein the lower laminating film 23 on the sheet pad 15 rests. The laminating films 21 . 22 . 23 are - which can not be seen here in more detail - designed as laminating film pockets, ie they consist of two equal and congruent superimposed film sheets, which at one edge 24 . 25 . 26 connected to each other. After unfolding the two sheets of foil, the sheet material to be laminated in can be inserted between the sheets of film.

The foil sheets of the laminating films 21 . 22 . 23 consist on the outside of smooth and thus clear, ie transparent trained plastic films. In order to be able to unfold the foil sheets better, both have on the sides facing each other adhesive layers with such an initial roughness that the surfaces are matt and the foil sheets themselves and thus also the laminating foils 21 . 22 . 23 as a whole not transparent, but at best translucent or dull or opaque.

On the inside of the respective lower foil sheet are line areas - exemplified with 27 . 28 . 29 designated - provided a certain width, which have been prepared by the existing there roughness has been smoothed, so that the foil sheet in these line areas 27 . 28 . 29 not dull, but transparent. The line areas 27 . 28 . 29 run transversely to the intended direction of movement when passing through the laminator 1 , They are aligned parallel to each other, extend over the entire width of the laminating films 21 . 22 . 23 and have the same width. The line areas 27 . 28 . 29 can also - and then congruent - be provided in the above sheet of foil.

The distance of the line areas 27 . 28 . 29 is significant for the thickness of the laminating films 21 . 22 . 23 , In the present example, the line areas have 27 the upper laminating film 21 a big distance, because the laminating film 21 is particularly thick, for example, 200 microns, while the line areas 28 the middle laminating films 22 are much smaller spaced. This distance is significant for an average thickness of the laminating film, for example 120 μm. When on the sheet pad 15 resting laminating film 23 is the distance of the line areas 29 even much smaller than the laminating film 22 The distance here is characteristic of a laminating film 23 small thickness, for example 80 microns.

A lamination process is as follows. After inserting the sheet material to be laminated between the two foil sheets of a laminating film - here, for example, the laminating film 23 - The combination of both on the sheet support 15 like it 3 can be seen. When the laminator is switched on 1 the laser scanner scans 20 over a certain scan angle, the number of line areas detected 29 (It can also be the distance between the line areas 29 be detected). According to the number of line ranges read 29 will - depending on the construction of the laminator 1 - either the flow rate through the flow channel 8th ie the speed of the laminating rollers 12 . 13 to a high value and / or the temperature of the laminating rollers 12 . 13 set to a low value. This happens because of the laminating film 23 - As described above - has only a small thickness and thus also has only a small heat capacity, ie it is heated with a small amount of heat to the optimum temperature for the lamination process. At the same time the laminating gap 14 in adaptation to the thickness of the laminating film 23 placed so close that the pressure necessary for the lamination process is achieved.

The laminating film 23 or the combination of laminating film 23 and loaded sheet material is then through the feed opening 9 towards the laminating rollers 12 . 13 pushed. There she gets from the laminating rollers 12 . 13 detected and under the influence of pressure and heat through the laminating gap 14 transported (see the 2 and 4 ). After leaving the laminating gap 14 protrudes from the outlet 10 out there and out of the laminator 1 be pulled out.

When laminating, ie when passing through the laminating gap 14 become the adhesive layers on the inner sides of the foil sheets of the laminating film 23 melted so that the laminating film 23 overall clear and transparent. Here, the roughness of the inside of that sheet of foil, on which the line ranges 29 are formed, to the line areas 29 so that the initial contrast between the line areas 29 and the intervening areas disappears. The marking of the laminating film 23 through the line areas 29 is therefore no longer visible after the lamination process, ie the original marking no longer disturbs the finished laminating product.

Of course, this also applies to the laminating films 21 . 22 , If these are used for lamination, the laser scanner reads 20 a correspondingly smaller number of marking lines 28 respectively. 27 with the result that the throughput speed, ie the speed of the laminating rollers 12 . 13 with increasing thickness of the laminating films 21 . 22 lowered and / or the temperature of the laminating rollers 12 . 13 is increased. At the same time the laminating gap 14 enlarged in a corresponding manner.

Claims (32)

Process for hot lamination of sheet material and laminating film ( 21 . 22 . 23 ) by means of a laminating device designed as an office appliance ( 1 ), wherein the sheet material and laminating film ( 21 . 22 . 23 ) and the combination thus formed in the Laminator ( 1 ), where the combination under the influence of pressure and elevated temperature and with adaptation of the temperature and / or the throughput speed to the thickness and / or the material of the laminating film ( 21 . 22 . 23 ) is welded together, characterized in that a laminating film ( 21 . 22 . 23 ) whose initial roughness on at least one side is greater than the final roughness after lamination, that the laminating film ( 21 . 22 . 23 ) is provided on this at least one side with a mark in the form of a surface pattern, the surface areas ( 27 . 28 . 29 ) whose roughness is less than the initial roughness but not less than the final roughness, the mark being from a sensor ( 20 ) of the laminator ( 1 ) is readable that the laminating film ( 21 . 22 . 23 ) with its mark on the sensor ( 20 ) is passed, whereby the sensor ( 20 ) reads out the mark and generates a signal characteristic of the mark, and that the temperature and / or the passage speed is adjusted in response to the signal. A method according to claim 1, characterized in that the surface areas as straight and parallel and spaced extending line areas ( 27 . 28 . 29 ) be formed. Method according to Claim 2, characterized in that the line regions ( 27 . 28 . 29 ) are formed so that they transversely to the continuous movement through the laminating ( 1 ). Method according to claim 2 or 3, characterized in that the distance and / or the width of the line regions ( 27 . 28 . 29 ) is made larger, the thicker or thinner the laminating film ( 21 . 22 . 23 ). Method according to claim 2 or 3, characterized in that the spacing of the line regions ( 27 . 28 . 29 ) the larger and the width of the line areas ( 27 . 28 . 29 ), the thicker the thinner or the thinner the laminating film ( 21 . 22 . 23 ). Method according to one of claims 1 to 5, characterized in that a laminating film ( 27 . 28 . 29 ) is used, which consists of a pair of foil sheets, between which the sheet material is inserted. Method according to at least claims 1 and 6, characterized in that at least one foil sheet on the side facing the other foil sheet has the initial roughness. Method according to claim 6 or 7, characterized in that a laminating film ( 21 . 22 . 23 ) is used, the foil sheets on at least one edge ( 24 . 25 . 26 ) are interconnected. Method according to one of claims 6 to 8, characterized in that only one of the two foil sheets is provided with the marking. Method according to one of claims 1 to 9, characterized in that the mark is read with an optical sensor, in particular a laser sensor. Method according to one of claims 1 to 10, characterized in that on the signal and the height of a lamination ( 14 ) in the laminator ( 1 ) is set. Laminating film ( 21 . 22 . 23 ) for carrying out the method according to one of claims 1 to 11, wherein the laminating film ( 21 . 22 . 23 ) has on at least one side an initial roughness, which the laminating film ( 21 . 22 . 23 ), characterized in that the laminating film ( 21 . 22 . 23 ) on the matte side or at least one of the matte sides a marking in the form of a surface pattern with surface areas ( 27 . 28 . 29 ) whose roughness is less than the initial roughness. Laminating film according to claim 12, characterized in that the surface areas as straight and parallel and spaced extending line areas ( 27 . 28 . 29 ) are formed. Laminating film according to claim 13, characterized in that the line regions ( 27 . 28 . 29 ) extend parallel to an edge of the laminating film. Laminating film according to claim 13 or 14, characterized in that the distance and / or the width of the line areas ( 27 . 28 . 29 ), the larger the thicker or thinner the laminating film is. Laminating film according to claim 13 or 14, characterized in that the spacing of the line regions ( 27 . 28 . 29 ) the larger and the width of the line areas ( 27 . 28 . 29 ) the smaller, the thinner or thinner the laminating film ( 21 . 22 . 23 ). Laminating film according to one of claims 12 to 16, characterized in that the laminating film ( 21 . 22 . 23 ) consists of a pair of foil sheets. Laminierfolie according to claim 17, characterized in that at least one foil sheet on the other form facing side has the initial roughness and there is provided the surface pattern. Laminierfolie according to claim 17 or 18, characterized in that the foil sheets on at least one edge ( 24 . 25 . 26 ) are interconnected. Laminating film according to one of claims 17 to 19, characterized in that only one of the two sheets of film is provided with the surface pattern. Laminating foil set with laminating foils ( 21 . 22 . 23 ) of different thickness and / or different material, characterized in that the laminating films ( 21 . 22 . 23 ) bear a characteristic of their thickness and / or their material marking according to one of claims 12 to 20. Laminator ( 1 ) for hot lamination of sheet material and laminating film, with a housing ( 2 ), by - starting from a feed opening ( 9 ) - a pass channel ( 8th ) for the passage of a combination of sheet material and laminating film ( 21 . 22 . 23 ) and in which a pass channel ( 8th ) associated with lamination ( 11 ) in which the combination is laminatable under the action of pressure and elevated temperature, wherein in the housing ( 2 ) a transport device ( 12 . 13 ) for transporting the combination in the flow channel ( 8th ) is provided at a certain throughput speed and wherein the temperature and / or the throughput speed is adjustable, characterized in that the laminating apparatus ( 1 ) a sensor ( 20 ) for reading a mark in the form of a surface pattern on the laminating film ( 21 . 22 . 23 ), wherein a laminating film ( 21 . 22 . 23 ) whose initial roughness on at least one side is greater than the final roughness after lamination, and where the surface pattern is surface areas ( 27 . 28 . 29 ) whose roughness is less than the initial roughness, but not less than the final roughness, wherein the sensor ( 20 ) in response to the read-out mark generates a signal for a display device and / or for a control device, which with the lamination device ( 11 ) and / or the transport device ( 12 . 13 ) and configured such that the control device determines the temperature of the laminating device ( 11 ) and / or the passage speed of the transport device ( 12 . 13 ) depending on the read mark. Laminating apparatus according to claim 22, characterized in that the laminating device ( 11 ) at least one pair of rollers with two a laminating ( 14 ) forming laminating rollers ( 12 . 13 ), of which at least one can be heated by means of a heating device. Laminating apparatus according to claim 23, characterized in that at least one of the laminating rollers ( 12 . 13 ) Is part of the transport device, and that the transport device has an electric drive, via which the laminating rollers) ( 12 . 13 ) is rotatable or are. Laminating device according to one of claims 22 to 24, characterized in that the sensor ( 20 ) in the direction of passage in front of the laminating device ( 11 ), in particular outside the housing ( 2 ) is arranged. Laminating apparatus according to claim 25, characterized in that on the housing ( 2 ) as a continuation of the flow channel ( 8th ) via the feed opening ( 9 ) a sheet support is provided and that the sensor of the sheet support ( 15 ), in particular in the sheet support ( 15 ) is integrated. Laminating device according to one of claims 22 to 26, characterized in that the sensor ( 20 ) is designed as an optical sensor, in particular as a laser scanner. Laminating apparatus according to one of claims 22 to 27, characterized in that the sensor ( 20 ) is suitable to read surface areas of different reflections and / or absorption. Laminating apparatus according to one of claims 22 to 27, characterized in that the sensor ( 20 ) transversely to the passage direction in the flow channel ( 8th ) is movably guided. Laminating apparatus according to claim 29, characterized in that the laminating apparatus ( 1 ) two movable side stops ( 17 . 18 ) for the centric introduction of the laminating films ( 21 . 22 . 23 ), wherein the sensor ( 20 ) with one of the side stops ( 17 . 18 ) connected is. Laminating device according to one of claims 22 to 30, characterized in that the laminating device ( 11 ) in the Dürchlaufkanal ( 9 ) a laminating gap ( 14 ), in which the combination of pressure and temperature is applied, and that the height of the lamination ( 14 ) as a function of the signal of the sensor ( 20 ) is adjustable or is set automatically via the control device. Laminating system from a laminator ( 1 ) according to any one of claims 22 to 31 and a laminating film set according to claim 21.

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