DE102008057006A1 - Laminating film, useful for hot lamination of sheet material, has an initial roughness on at least one side, which makes the laminating film matte, where the laminating film exhibits a surface pattern with surface areas on the matte side - Google Patents

Abstract

Laminating film for hot lamination of sheet material, has an initial roughness on at least one side, which makes the laminating film matte. The laminating film exhibits a surface pattern with surface areas, on the matte side and/or at least one of the matte sides. The roughness of the surface pattern is less than the initial roughness. Independent claims are also included for: (1) a laminating kit for hot lamination of sheet material with lamination films of different thickness and/or different materials, where the laminating film contain a characteristic marking for describing its thickness and/or material; (2) a laminating system comprising a laminating device (1) and laminating film, where the laminating device comprises a housing (2) through which, based on a feed opening, a flow channel for the passage of a combination of sheet material and laminating film is present and in which a laminating device associated with flow channel is arranged, in which the combination is laminated under the influence of pressure and elevated temperature, where in the housing a transport device for transporting the combination in the flow channel with a given throughput speed is provided and where the temperature and/or the flow rate is adjustable by an input port in several stages, where each stage has a distinctive symbol; and (3) the laminating device comprising the housing and a sensor, where the sensor is suitable for reading a marking, and a signal for a display device and/or for a control device is generated, where the display- or control device is connected with the laminating device and/or transport device, and the control device adjust the temperature of the laminating device and/or flow speed of the transport device.

Description

The The invention relates to a method for hot lamination of Sheet material according to the preamble of claim 1, a for the method suitable laminating film according to the preamble of claim 13, a laminating film set according to the preamble of claim 22, a laminating apparatus according to the preamble of claim 24 and a lamination system of laminator 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 additionally heated. 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 ).

to Time are laminating films in a thickness of 30 microns to 500 microns on the market. By selecting the film thickness, the laminated Blattgut a desired flexibility or rigidity are given. It is understood that for the welding thicker laminating films are expended more heat energy must be as for the welding of thin Laminating foils made of the same material. Laminators that for the processing of laminating foils different Thickness are determined, therefore, must be so to the thickness can be adapted to the respective laminating film to be processed, that on the one hand for the welding of the sheet material provided sufficient heat energy On the other hand, but the laminating film is not overheated and damaged. Such laminators have Therefore setting on, with which the temperature of the Lamination and / or the flow rate to the each thickness of the laminating film can be adjusted by hand.

In In practice, however, it has turned out that time and again to incorrect operation comes, especially if - as in larger Offices - a variety of people access to one Laminator has. An incorrect operation has the consequence that if the heat is too low lamination is insufficient, the laminated sheet material is therefore not sufficiently protected or that the laminating film overheats if the heat is too high and thereby adhering the laminating film to the laminating rollers, which the destruction of the laminator has the consequence. Moreover, the laminated sheet material becomes unreadable damaged. The latter condition is usually irreparable and in the worst case equals destruction of the document.

Of the The invention is therefore based on the object, a method for hot lamination to provide sheet material, with the incorrect operation of the laminator when using laminating films of different thickness - or also different materials - reduced or completely be avoided. Other tasks include a for the method suitable laminating or one of a plurality laminating film set consisting of such laminating films, one for this purpose specially designed laminator and a system Laminator and laminating film set available to deliver.

The The problem relating to the method according to the invention is characterized solved that provided the laminating film with a marker which is readable by a sensor of the laminator is that the laminating foil passes with its mark on the sensor is, with the sensor reads the mark and a for the marking produces a characteristic signal, and the temperature and / or the sweep speed depending on the signal is set.

basic idea The invention is to provide a method in which the Laminierfolie with a Dic ke and / or their material characterizing Marking is associated with this laminating film used with a laminator that has a sensor for reading the mark and for generating a for having the mark characteristic signal, wherein the temperature and / or the flow rate depending on the respectively read mark or generated by the sensor Signal is set. There is basically the possibility to use the signal for a display based on the Operator via an appropriate input interface the temperature and / or the flow rate accordingly of the ad. The ad can display a code or the represent temperature and / or flow rate to be set. As a result, the risk of incorrect operation is significantly reduced. It is completely excluded if that from the sensor generated signal to a control device for automatic adjustment the temperature and / or the flow rate passed becomes. In this method, no manual intervention takes place. The lamination result is independent of which thickness and / or which material has the laminin film, flawless, and operating errors can not occur anymore.

When Marking for the laminating films to be used in the process Everything comes into question, what with the help of a sensor read out and what differentiated by thickness and / or material are formed can. So can printed marks, for example in the form of numbers, letters or combinations thereof or in Form of a bar code, but also magnetic stripes, magnetically scannable particles or the like. Because such markings usually on the finished laminated product are recognizable, can be provided that they are limited to a supernatant are then removed by trimming.

The latter can be avoided, however, if in the process a laminating film is used, the initial roughness on at least one side greater than the final roughness after lamination, wherein the laminating film on this at least one side with a Surface pattern is provided, the surface areas whose roughness differs from the initial roughness, in particular less than the initial roughness, but not less than that Endrauigkeit. The starting point is therefore a laminating film known per se, in which at least one side has an initial roughness, which in the Usually so large that the laminating film is matt or opaque, so translucent at best. Reason for this training it is the sticking of laminating foils or foil sheets a laminating film to each other due to static electricity to reduce. As a rule, the initial roughness gets through causes the applied adhesive. For the inventive Procedure will use this equipment of laminating film in the Were used that on the provided with the initial roughness Page a surface pattern, preferably by smoothing of certain surface areas, that is then provided is sensed by the sensor. The virtue of this type of marking is that the surface pattern during the lamination process disappears, ie no longer recognizable on the laminated end product is because the surfaces with the initial roughness - in usually the adhesive layer - and possibly also the surface areas of the surface pattern are melted be that page over its entire surface evenly smooth and thus evenly becomes transparent.

Regarding Type and extension of the surface pattern actually exist no restrictions. There should be such a contrast between given the surface areas and the initial roughness, that it is detectable by the sensor, preferably in that the surface areas of the surface pattern already so are smoothed, that they the final roughness after the lamination process to have. Very easy to make are marks where the Surface areas as straight, parallel and spaced running Line areas are formed. That way the distance can be and / or the width and / or the number of line areas scanned become. The production of the line areas happens to be simple Way in that the laminating film initially flat on the page provided with the initial roughness is provided and then passed over rollers which is the line areas by smoothing the initial roughness produce.

The Line areas may be in their extension to the area be limited, which is detected by the sensor. For manufacturing purposes appropriate It is, however, the line areas over the entire To extend width or length of the laminating film. For a good reading of the line areas, it is also advantageous if the line areas are transversely to the intended Passing through the laminator extend. ever after orientation of the readout direction of the sensor can However, the line areas also obliquely to the continuous movement or extend parallel to it.

The differentiation of the laminating film with regard to its thickness and / or its material can be done in the formation of the surface areas as line areas, characterized in that the distance and / or the width of the line areas the greater is designed, 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 inventive method can also under Use of rolls of film rolled up be, with the rollers inside the laminator are arranged. They are then included in the laminator merged to be welded sheet material. The separation then happens after the lamination process by means 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.

So far the marker has different reflection or transmission properties has, for example, if the mark is printed, or even if the marker is a surface pattern with surface areas is formed, whose roughness differs from the initial roughness, For reading the mark an optical sensor can be used become. Laser sensors, in particular, are particularly suitable for this purpose Laser scanner marking the mark over a certain distance or to sample a given angle.

Around the widest possible range of laminating film thicknesses To be able to process, the laminating, by the combination of laminating film and sheet material for imprinting the pressure is guided, be adjustable, taking after the invention is provided that then the signal generated by the laser is also used to adjust the height of the laminating gap, be it that the setting depends on a Signal is displayed manually or automatically via the already mentioned control device.

The itself to the lamination itself related task is inventively characterized solved that the laminating on at least one side Initial roughness, which makes the laminating matte or opaque makes, and that the laminating film on the matte side a surface pattern With surface areas, the roughness of the Initial roughness deviates, in particular less than the initial roughness. The surface pattern can be determined by a sensor Scan, which is associated with a laminator, as it is also the subject of the present invention. It can the surface pattern differentiating the respective thickness and / or the respective material of the laminating film are adapted, d. H. each thickness or each material can have a characteristic Surface patterns are assigned. In special, the Laminierfolie be formed as already above in connection with the method according to the invention in detail is described.

object The invention also relates to a laminating film set with laminating films different thickness and / or different material, wherein the laminating one for their thickness and / or their material wear characteristic marking, so that the laminating films based on the marking in relation to its thickness and / or its material distinguished and the markers are read by a sensor can. In particular, the laminating films should be so be formed, as shown in detail above.

As far as the laminating apparatus is concerned, the object relating thereto is achieved according to the invention in that the laminating apparatus has a sensor which is suitable for reading a marking of the laminating film and a signal for a display device and / or for a control device as a function of the read-out marking generated, which is connected to the laminating device and / or the transport device and designed 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 here too is to provide the prerequisite for an adaptation of the temperature and / or the throughput speed to the respective laminating film used and to use a sensor which can read different markings according to specific criteria, for example letters, numbers or combinations thereof , Stitch codes (barcodes) or just that surface areas of a surface pattern described above, which are different in roughness from the initial roughness of the laminating film, for example, by counting line areas over a certain readout distance or distances, etc. In this case, the criterion is the number and / or the distance of the line areas.

there 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 film or as an indication of the to be adjusted Temperature and / or flow rate, the operator then the temperature and / or the flow rate with the in the known devices already existing adjustment pretends. In the second, preferred variant, the signal to the Control of a control device used over the the temperature and / or the flow rate automatically according to adjusted to the signal or mark on the laminating film so that so far no manual intervention is required. It is understood that both variants also combined can be, d. H. that even with the automatic variant an indication of the laminating film thickness, the temperature and / or the Passing speed as pure information to the operator is done.

In Formation of the laminating device according to the invention it is provided that the laminating device at least one pair of rollers having two laminating rollers forming a laminating nip, of which at least one is heatable by means of a heating device, preferably both. At least one of the laminating rollers should be used Be part of the transport device, in which case the transport device a having electric drive over which the laminating rollers is rotatable and are and connected to the control device is.

It is useful if the sensor for reading the Marking arranged in the direction of passage in front of the laminator is, so that the mark read out before reaching the laminator and then set the laminator in terms of temperature and flow rate is before the combination of Lami nierfolie and sheet material the laminator has reached. An expedient embodiment is given when the sensor is outside the case is arranged, preferably so that on the housing as a continuation of the flow channel via the feed opening In addition, a sheet support is provided, in which case the sensor of the Sheet support is assigned, expediently integrated in the sheet pad. This opens up the possibility Convert existing laminators in a simple way.

As already mentioned above, comes as a sensor, especially an optical Sensor and here primarily a laser scanner in question. The laser should be suitable, surface areas of different Reflections and / or Absoprtion read.

To Another feature of the invention is that the sensor movably guided transversely to the passage direction in the flow channel is. In a laminator, which in per se known Two movable side stops for centric insertion the laminating film has in the flow channel, this can for example be realized by the sensor with one of the two Side stops is connected, so when adjusting the Side stops to the format of the laminating film automatically a correct assignment of the sensor takes place.

In order to the laminator also for a wide Range of laminating film thicknesses, the height of the laminating gap generated by the laminator in dependence be adjustable by the signal of the sensor or via the Control device to be set automatically. In this way The pressure acting on the laminating foil can be independent held by the thickness of the laminating film in an optimal range become.

Of the last part of the task is inventively a laminating system comprising a laminator and a laminating film set different thickness and / or different material solved, the laminator, as detailed above, is formed and wherein the laminating film set laminating with at least one for their respective thickness and / or their respective marking material has. Laminator and laminating films are adapted to each other so that the Laminator is capable of using the sensor respective marking on the laminating foils of the laminating foil set read and depending on the selected mark to generate an indication and / or automatically the temperature and / or To set throughput speed in the laminator so that an optimal lamination process is obtained and the finished one Laminated product has a high quality.

In the drawing, the invention is based on an embodiment 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 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 is inclined in the same direction as the flow 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 in a lead in 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 such that they also have 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 Laminierfolientaschen, 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 - vorgese a certain width hen, 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.

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

• - DE 202005005020 U1 [0002]
• - EP 1724111 A2 [0002]
• US 2004/0050500 A1 [0003]
• - DE 19744595 A1 [0003, 0015]
• - DE 20100328 U1 [0003, 0015]
• - DE 60029505 T2 [0003]

Claims (34)

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 resulting combination in the laminating ( 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 the laminating film ( 21 . 22 . 23 ) with a mark ( 27 . 28 . 29 provided by a sensor ( 20 ) of the laminator ( 1 ) is readable that the laminating film ( 21 . 22 . 23 ) with its mark ( 27 . 28 . 29 ) on the sensor ( 20 ) is passed, whereby the sensor ( 20 ) the mark ( 27 . 28 . 29 ) and one for the mark ( 27 . 28 . 29 ) generates a characteristic signal, and that the temperature and / or the passage speed is adjusted in dependence on the signal. Method according to claim 1, 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, and in that the laminating film ( 21 . 22 . 23 ) is provided on this at least one side with a surface pattern, the surface areas ( 27 . 28 . 29 ), whose roughness differs from the initial roughness, in particular less than the initial roughness, but not less than the final roughness. A method according to claim 2, characterized in that the surface areas as straight and parallel and spaced extending line areas ( 27 . 28 . 29 ) be formed. Method according to claim 3, 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 3 or 4, 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 3 or 4, 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 6, characterized in that a laminating film ( 27 . 28 . 29 ) Ver is used, which consists of a pair of foil sheets, between which the sheet material is inserted. Process according to at least the claims 2 and 7, characterized in that at least one foil sheet on the other side of the sheet facing the initial roughness having. Method according to claim 7 or 8, 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 7 to 9, characterized in that only one of the two foil sheets with the marking ( 27 . 28 . 29 ). Method according to one of claims 1 to 10, characterized in that the marking ( 27 . 28 . 29 ) is read with an optical sensor, in particular a laser sensor. Method according to one of claims 1 to 11, 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 12, 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 surface pattern with surface areas ( 27 . 28 . 29 ), whose roughness differs from the initial roughness, in particular is less than the initial roughness. Laminierfolie according to claim 13, characterized in that the surface areas as straight as well as parallel and spaced extending line areas ( 27 . 28 . 29 ) are formed. Laminating film according to claim 14, characterized in that the line regions ( 27 . 28 . 29 ) extend parallel to an edge of the laminating film. Laminating film according to claim 14 or 15, characterized in that the distance and / or the width of the line regions ( 27 . 28 . 29 ), the larger the thicker or thinner the laminating film is. Laminating film according to claim 14 or 15, characterized in that the spacing of the line regions ( 27 . 28 . 29 ) the larger and the width of the line areas ( 27 . 28 . 29 ) is the lower, je di cker or the thinner the laminating film ( 21 . 22 . 23 ). Laminating film according to one of claims 13 to 17, characterized in that the laminating film ( 21 . 22 . 23 ) consists of a pair of foil sheets. Laminating film according to claim 18, characterized that at least one foil sheet facing on the other form Side has the initial roughness and there provided the surface pattern is. Laminating film according to claim 18 or 19, characterized in that the foil sheets on at least one edge ( 24 . 25 . 26 ) are interconnected. Laminating film according to one of the claims 18 to 20, characterized in that only one of the two foil sheets 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 ) a characteristic of their thickness and / or their material marking ( 27 . 28 . 29 ) wear. Laminating film set according to claim 22, characterized in that the laminating films ( 21 . 22 23 ) are formed according to one of claims 13 to 21. 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 ), which is used to read a mark ( 27 . 28 . 29 ) and a signal for a display device and / or for a control device is generated in dependence on the read-out marking, which signal is transmitted to 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 ( 27 . 28 . 29 ). Laminating apparatus according to claim 24, 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 25, 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 roller (s) ( 12 . 13 ) is rotatable or are. Laminating device according to one of claims 24 to 26, 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 27, 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 apparatus according to one of claims 24 to 28, 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 24 to 29, 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 24 to 29, characterized in that the sensor ( 20 ) transversely to the passage direction in the flow channel ( 8th ) is movably guided. Laminating apparatus according to claim 31, 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 24 to 32, characterized in that the laminating device ( 11 ) in the flow channel ( 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 24 to 33 and a laminating film set according to claim 22 or 23.