EP1925443B1 - Device for satinizing and embossing packaging films - Google Patents

Description

The present invention relates to a device for satinizing and embossing packaging films with at least three embossing rollers, according to the preamble of patent claim 1.

However, it is also possible to provide a device with two embossing rollers, as in the preamble of claim 2.

Such devices are from the EP-A-1 372 946 of the same applicant. The European patent application is a further development of the device according to US Pat. No. 6,715,411 of the same applicant. Both devices defined therein have in common that the paper web first passes through a first pair of rollers and then a second pair of rollers, wherein the contact pressure is reduced by the use of three rollers and a better refraction of the paper portion of the film can be achieved.

The surface structures of the embossing rolls, i. the arrangements of the teeth, circular ribs or longitudinal ribs on the prior art rolls, break the paper symmetrically, resulting in a more homogeneous refraction of the fibers in two directions compared with the prior art, and whereby finer embossments can be obtained, preventing the formation of wrinkles in the logo area, a reduced tendency to tubing and curling can be determined and good folding properties, or so-called dead-foil properties, can be achieved.

1. a) Eine einflussreiche und schwer zu beherrschende Komponente ist die Uneinheitlichkeit der Beschaffenheit der Folie, in der Zigarettenindustrie Innerliner genannt, wobei sich die Schwierigkeiten daraus ergeben, dass sich die Vielfalt der kommerziell erhältlichen Innerliner-Papiere ständig erhöht, ohne dass irgendwelche Vereinheitlichungstendenzen sichtbar sind. Das bedeutet, dass je nach Region oder Anforderungen aus dem Marketingbereich Papiere mit einem spezifischen Flächengewicht von 30 g/m² bis 80 g/m², metallisiert, Aluminium-kaschiert oder oberflächenbehandelt, z. B. durch Bedrucken, um eine metallähnliche Oberfläche zu erzielen, verwendet werden. Bei der Anwendung von sogenannten Schattenprägungen, siehe z.B. US-B-7 036 347 des gleichen Anmelders, werden sehr feine Strukturen erzeugt, die Material unabhängig mit gleicher Qualität geprägt werden müssen.
2. b) Die mechanischen Eigenschaften der Folien werden stark durch die eingesetzten Zellstoff-Fasern, deren morphologischen Eigenschaften sowie deren Verarbeitung bestimmt. Äusserlich ähnliche Folien können sich deshalb in ihrem mechanischen Verhalten stark unterscheiden. Davon ausgehend ist es erstrebenswert, mit Innerlinern von schlechter Qualität gute Resultate zu erzielen.
3. c) Für die industrielle Prägung der unterschiedlichen Folien ist es daher wünschenswert, unabhängiger von deren breiten Sensibilitätsbereich zu werden.
4. d) Eine weitere, ökonomische Herausforderung besteht darin, Folien unterschiedlicher Beschaffenheit derart zu prägen, dass sich diese beim Betrachten von ähnlich geprägten Zeichen optisch kaum mehr unterscheiden. Beim jetzigen Stand der Technik können dieselben Prägungen sowohl bei Logos als auch bei Schattenprägungen für das Auge sehr unterschiedlich ausfallen, je nach Beschaffenheit der Folie.

However, there have recently been more problems with the films on paper underlay. Below are given some of these problem areas, which result from the most diverse, newer paper properties:

1. a) An influential and difficult-to-control component is the inconsistency in the nature of the film, called innerliner in the cigarette industry, with the difficulty that the variety of commercially available innerliner papers is constantly increasing without any tendency to unify. This means that, depending on the region or marketing requirements, papers having a specific basis weight of from 30 g / m ² to 80 g / m ² , metallized, aluminum-clad or surface-treated, e.g. B. by printing to achieve a metal-like surface can be used. When using so-called shadow embossing, see eg US-B-7 036 347 by the same Applicant, very fine structures are produced, which material must be coined independently with the same quality.
2. b) The mechanical properties of the films are strongly determined by the pulp fibers used, their morphological properties and their processing. Externally similar films can therefore differ greatly in their mechanical behavior. Based on this, it is desirable to achieve good results with poor quality inner liners.
3. c) For the industrial embossing of the different films, it is therefore desirable to become more independent of their wide range of sensibilities.
4. d) Another economic challenge is to shape films of different characteristics in such a way that they are similarly shaped when viewed Visually hardly distinguish characters. In the current state of the art, the same embossing can be very different for both the logo and the shadow embossing, depending on the nature of the film.

It is from this prior art object of the present invention to provide a device for satinizing and embossing of films, with which the fibers of the paper backing of the film are broken even more effectively to give a better overall appearance after embossing, the virtually independent of the nature of the paper backing of the film is to allow as well as the impeccable embossing of fine structures. Such a device is defined in claim 1 or claim 2. Further objects and advantages are defined in dependent claims.

Fig. 1

zeigt schematisch und in perspektivischer Sicht eine Vorrichtung mit einer Prägewalze mit einer homogenen Anordnung von Zähnen, die mit zwei weiteren Prägewalzen zusammenwirkt,

die Figuren 2 - 5

zeigen je eine Struktur der beiden weiteren Prägewalzen, in einer Ausschnittvergrösserung,

Fig. 6

zeigt eine Ausführungsvariante der Strukturen der weiteren Prägewalzen,

die Figuren 7 und 8

zeigen weitere Ausführungsvarianten der Strukturen der weiteren Prägewalzen,

Fig. 9

zeigt schematisch einen Schnitt durch die drei unsynchronisierten Prägewalzen,

Fig. 10

zeigt schematisch einen Schnitt durch die drei synchronisierten Prägewalzen,

Fig. 11

zeigt eine Ausschnittvergrösserung von Zähnen der ersten Prägewalze mit Makro- und Mikro-Strukturierungen,

Fig. 12

zeigt, in einem noch grösseren Massstab, verschiedene mögliche Mikro-Strukturierungen der Zahnoberfläche von Fig. 11,

Fig. 13

zeigt eine Variante zu Fig. 11, mit Makro-Strukturen an und Mikro-Strukturierungen auf den Zähnen, und

Fig. 14

zeigt eine zweite Ausführungsform der Erfindung mit zwei Prägewalzen.

The invention will be explained in more detail below with reference to drawings of exemplary embodiments.

Fig. 1

shows schematically and in perspective a device with an embossing roller with a homogeneous arrangement of teeth, which cooperates with two other embossing rollers,

FIGS. 2 to 5

each show a structure of the two further embossing rollers, in a section enlargement,

Fig. 6

shows a variant of the structures of the further embossing rollers,

FIGS. 7 and 8

show further embodiments of the structures of the further embossing rollers,

Fig. 9

shows schematically a section through the three unsynchronized embossing rollers,

Fig. 10

shows schematically a section through the three synchronized embossing rollers,

Fig. 11

shows a partial enlargement of teeth of the first embossing roller with macro and micro structurings,

Fig. 12

shows, on an even larger scale, various possible microstructures of the tooth surface of Fig. 11 .

Fig. 13

shows a variant too Fig. 11 , with macro-structures on and micro-structuring on the teeth, and

Fig. 14

shows a second embodiment of the invention with two embossing rollers.

In the schematic representation of Fig. 1 are three embossing rollers R1, R3 and R2 shown, wherein the embossing roller R1 is driven by a drive 4. The embossing roll R1 is known per se and has been disclosed in various patents, also in the documents cited at the outset. The driven embossing roller R1 has a surface structure with both axially and circularly homogeneously scored individual teeth 5, by means of which the satin effect is achieved. This surface structure is referred to as a basic grid GR. In this case, the teeth may be pyramid-shaped with different cross sections, designed as truncated pyramids or conical. In the case of pyramidal teeth, these have a cross section in the form of a quadrilateral parallelogram.

The two further embossing rollers R2 and R3 can see through the film 9 and by means of suitable surface structures through the first embossing roller R1, see Fig. 9 , or are driven by means of a known synchronous transmission 6, 7 and 8, see Fig. 10 , As a rule, the film 9 is guided through the embossing rollers in such a way that the metallised or treated surface points towards the first embossing roller R1.

However, it is also possible to drive embossing roller 2 or 3 instead of embossing roller 1 and to let the other embossing rollers run free. Instead of a synchronization by means of gears, synchronization by means of belts or electronic means is also possible.

In papermaking, so-called flocculation is a key process in that pulp suspensions show a natural flocculation tendency. This increases with increasing concentration of the fibers, resulting in an increasing consistency. The dense fiber flocculation observed in many inner liners gives the paper a relatively high strength. However, the flakes are distributed very unevenly over the paper surface and it can currently be achieved no homogeneous, fine sieve structures.

Investigations have shown that the film with uniform toothing by the embossing process in the running direction, ie in the longitudinal direction, tends to be shortened and slightly widened in the transverse direction. This effect can be explained by the fact that the pulp fibers are mainly longitudinally aligned. By squeezing the fibers they naturally gain in width and only to a small extent in length.

In order to counteract this tendency, according to the prior art, the surfaces of each embossing roller were homogeneously provided with similar elevations and depressions - with the basic pattern - e.g. with pyramidal teeth of different cross sections such. As square parallelograms, truncated pyramids or conical teeth, so that an interaction with the other embossing rollers involved in the embossing process is possible.

Asymmetric structural elements in the individual, consisting of the same teeth basic grid were avoided to counteract distortion of the embossed image. Various alternatives have recently been tested to cope with the demands made by the various types of paper and grades of paper.

Investigations have now shown that by the use of embossing rollers with different structural elements, such as sprockets, circular, helical or along the embossing roll arranged rows of teeth whose grid is not the same as that of the basic grid GR of the first embossing roll, a very large improvement in refraction, or neutralization of the resulting by the flocculation sub-structures of the paper backing was achieved. This can be explained by the fact that to eliminate randomly formed flakes, structures of the roll surface which do not have the same basic grid GR are more suitable. This applies to both the three and the two-roll arrangement.

By using the rollers described below, not only a better refraction and neutralization of the paper underlay with respect to wrinkling, tubing and curling is achieved, but in particular also an aesthetically much improved surface of the film, this a noble Gives appearance. Finally, such a surface of the film allows a finer and more accurate embossing of very fine structures, which serve, for example, for the production of authentication and identification features.

How out Fig. 9 or 10 shows, the film 9 first passes through the roller pair R1 and R2 and then the roller pair R1 and R3. It follows that the film first passes through the arrangement with different structures of a pair of rollers, and then by the surface structure of the second pair of rollers differently, ie treated inhomogeneous, resulting in a completely inhomogeneous treatment of the film, the surprising results shows.

In Fig. 1 is, as already mentioned, the embossing roller R1 is provided with homogeneously rasterized individual teeth 5, which define the basic grid GR. These may be pyramidal or conical teeth, which have a known flattening of at least 2%, preferably at least 5%, wherein the cross section of the pyramidal teeth has the shape of a quadrangular parallelogram.

In Fig. 1 In addition, the surface structures of the embossing rollers R2 and R3 are symbolized by the letters A - J and Q - Z, respectively. When comparing Fig. 1 With Fig. 2 It can be seen that the designation R2A denotes the surface structure A of the embossing roller R2, and R3Q the surface structure Q on embossing roller R3, etc.

In Fig. 2 is given a possible surface structure of the embossing rollers R2 and R3. The surface structure A of the roll surface of R2 according to Fig. 2 is defined by longitudinal ribs 10 which are separated by Structural elements in the form of rows of teeth 11 are interrupted, wherein the row of teeth 11 composed of individual teeth 5 and the teeth have a truncated pyramidal configuration in the present example. Therefore, the surface of R2 does not consist of uniform longitudinal ribs, as known from the prior art, but of longitudinal ribs which are interrupted by circular rows of teeth, wherein the grid of these structural elements is not the same as the basic grid GR.

The structure Q of the third embossing roller R3 here consists of uniformly arranged circular ribs 12, as is known per se in embossing rollers according to the prior art.

The longitudinally, transversely or helically extending structural elements have a cross-section which tapers outwards and has a flattening, the dimensions of the structural elements and the grooves lying between them corresponding to the dimensions of the teeth 5 of the first, driven embossing roller R1, with all teeth engaging in the grooves between the ribs.

In Fig. 3 It is shown that the surface structure B of the embossing roller R2 has the interrupted longitudinal ribs 10 and double rows of teeth 13, it being understood that there may also be three or more rows of teeth interrupting the longitudinal ribs 10. The embossing roller R3 has the same surface structure Q as shown Fig. 2 on.

In Fig. 4 It is shown that the embossing roller R2 has the same surface structure A as in FIG Fig. 2 while the embossing roller R3 has a surface structure R in which circular ribs 14 are interrupted by longitudinal rows of teeth 15, the rows of teeth consisting of individual teeth 5.

In the illustration according to Fig. 5 the embossing roller R2 has the surface structure B as shown in FIG Fig. 3 while the embossing roller R3 has a surface structure S, wherein the circular ribs 14 are interrupted by double longitudinal rows 16, these rows also consisting of individual teeth 5.

Already from the description of FIGS. 1 to 5 shows that a great variety of variations is conceivable. Thus, it is of course possible to provide not only structural elements in the form of single or double rows of teeth, but also three or more rows of individual teeth, between which longitudinal or circular ribs are arranged.

In addition, it will be understood that both the dimensions of the individual teeth and the spacing between the rows of teeth as well as the longitudinal or circular ribs may vary in dimensions and distances, provided that they are sized and arranged to be always engaged, or rolling with the rastered teeth of the embossing roller R1 can be brought. Of course, any combination of the specified types of rolls of both embossing rolls is possible.

While in the Fig. 1-5 Surface structures are shown in which the structural elements are arranged orthogonal to the longitudinal axis of the rollers are in the Fig. 6 and 8th Shown surface structures in which the individual teeth or continuous ribs structure elements are arranged helically.

In Fig. 6 For the embossing roller R2, a surface structure G is shown, in which in the longitudinal ribs 10 as according to Fig. 5 Structure elements 17 are arranged helically and, for example, at an angle of 45 ° to the longitudinal axis, which in turn consist of rows of teeth with individual teeth 5.

The counter-roller R3 has a surface structure X, which is mirror-inverted to the structure G, but wherein structural elements 18 of two rows of teeth 5 and at the angle of z. B. 45 ° to the longitudinal axis of the embossing roller are arranged. As in the Fig. 3, 4 and 5 2, the embossing roller R3 with surface structure X likewise has rings 12, which are perforated by the structural elements 18.

In Fig. 7 For embossing rollers R2, a surface structure H is shown whose structural elements do not consist of rows with individual teeth, but of circular ribs 19, wherein the distances between the individual ribs is variable and there are no longitudinal ribs. The embossing roller R3 has the surface structure Y consisting of longitudinal ribs 20. Again, the interaction of the embossing rollers R2 and R3 results in a non-homogeneous refraction of the paper fibers.

The embossing rollers according to Fig. 8 are analogous to the embossing rollers according to Fig. 6 can be seen by as a structural elements helically arranged ribs 21 are provided, but without intervening longitudinal or transverse ribs, whereby also here the distances between the individual ribs can be variable. The ribs 22 of the embossing roller R3, which give the surface structure Z, are arranged in close tightness and helical in this example. Again, an interaction of the two embossing rollers R2 and R3 is a non-homogeneous embossing and thus a maximum refraction of the paper fibers.

Based on these embodiments, a very large number of variations are possible, both in terms of the distances between the individual webs as well as with respect to the angle of the circulating webs. Combinations of the types shown are also possible, i. that individual circular, longitudinal or screw paths can consist of individual teeth. In addition, it will be apparent to one skilled in the art that the teeth need not necessarily be rectangular or square pyramids flattened at the tip, they may also be tapered, preferably flattened teeth.

For certain types of paper, it is sufficient, only a two-roll device according FIG. 14 to use. Analogously, all surface structures described above also apply to the two-roll device, wherein the driven embossing roll R31 has a basic grid GR1, which is analogous to the basic grid GR. The teeth 35 have a rhombic cross-section as a variant embodiment, and the sides with respect to the longitudinal axis can be arranged rotated by an arbitrary angle, for example by 45 °. This results in a good synchronization of the two rollers.

The second roller R2 always has a non-homogeneous surface structure, such as A, B, G, H, J; R, S, X. If the first embossing roller has teeth as in R1, the second roller can be driven either by the shaping of the teeth and ribs over the foil or by means of synchronization means.

The described and drawn embossing rollers are, as shown, suitable for the optimal calendering of packaging films, in particular cigarette paper. If logos are desired, they will, as out known in the art, preferably mounted on the embossing roller R1 with the basic grid GR or GR1. This is done by removing teeth at the point where the logo is to be created so that the metallised or treated surface of the film that comes to rest there will not change as it passes through and remain shiny.

As already mentioned at the beginning, the treatment of the film according to the invention makes its surface particularly fine, so that in addition to logos, authentication and identification features can be embossed that are particularly tamper-proof and have a very fine structure. In addition, this surface structure is also particularly suitable for so-called shadow embossing, which will be described later.

Authentication and identification features and shadow embossing can eg US-B-7 036 347 be produced by the same applicant or by means of embossing rollers, which in the EP-A-1 437 213 disclosed by the same applicant.

In the FIGS. 11-13 is an example in the EP-A-1 437 213 Macro-structure and micro-structuring called surface treatment of the individual teeth and the tooth base of the driven embossing roller R1, shown.

In FIG. 11 Six teeth 5S1 to 5S6 are drawn, with the microstructures hatched. The teeth are truncated pyramidal with a rectangular plan, with the side edges aligned parallel or perpendicular to the longitudinal axis of the roller and the pyramids are flattened.

Tooth 5S1 has a micro-structuring 20 on the flattened part of the tooth and a microstructure 21 on one or both lateral sides of the tooth and tooth 5S4 has the same surface structuring 20 and a micro-structuring 22 on one or both longitudinal sides (FIG. n) of the tooth. The tooth root ZG may have a microstructure 23 along the longitudinal side of the teeth or a microstructure 24 over certain lengths or a microstructure 25 transversely thereto.

Tooth 5S2 has on one or both longitudinal sides a microstructure 26 which extends over the entire side, and tooth 5S3 has a microstructure 27 which extends over the entire surface of the flattened part. The teeth 5S5 have only a small microstructure 28 over the height of the long side, while tooth 5S6 is unchanged. From this, of course, a variety of micro-structurings can be applied, giving an equally large variety of patterns on the film.

In the Figures 12A-12D In a larger magnification, some examples of possible straight or curved microstructures on and on the teeth are given. In FIG. 12A is shown in cross section a positive grid structure, wherein the individual webs 30 have a distance of a few microns. This patterning may be located on any of the microstructures 20, 21, 28, or 29, but may also be attached to the root of the teeth, such as microstructures 23, 24, or 25.

In FIG. 12B is a cross-section of a negative grating structure indicated, wherein the recesses 31 also have a distance of a few 100 nm to a few microns apart.

In FIG. 12C is a perspective view of a possible positive micro-structure by means of grid-like, curved webs 32 indicated.

In FIG. 12D is a perspective view of a possible negative micro-structuring by means of grid-like, curved grooves 33 indicated. This structure is suitable, for example, to find use in microstructuring 24 or 25.

It is evident from these few examples, that a very wide range of variation of both the micro-structuring, or distribution of microstructures on the individual teeth and on the tooth base or only on the tooth base alone, as well as the type of micro-structuring itself is possible. This depends on the respective state of the art for the production of these structures, the production of microstructures in particular also being used in the production of electronic chips and being known there. With such fine microstructures, the use of suitable methods such as lacquer or etching techniques plays a major role. Such micro-structuring produces a diffraction of the light upon irradiation.

The teeth of FIG. 13 have both a macrostructure and a micro-structuring. In this case, the term macrostructure is understood to mean the change in the tooth geometry which when embossing generates characters whose appearance changes depending on the viewing angle of the viewer and / or the type and / or location of the illumination source. These geometrically altered teeth shape more or less the metal surface of the film. This macro-structure may be overlaid with a micro-structuring to give special effects to the shadow embossing.

In FIG. 13 You can see three geometrically unchanged teeth 5S1, 5S4 and 5S6, but with the microstructures as in FIG. 11 and the geometrically altered teeth 5M1, 5M2 and 5M3, where the "M" stands for macrostructure. The tooth 5M1 has a greater flattening than a normal tooth, for example 5S1, wherein a micro-structuring 20 is mounted on the flattened part.

The tooth 5M2 has only a larger flattening and is otherwise unchanged, while the tooth 5M3 has been halved in width. Of course, the teeth 5M2 and 5M3 may also have microstructures. Also in the example according to FIG. 13 For example, the tooth root may be machined and the same microstructure 23 as in FIG FIG. 11 and have a microstructure 25.

From the presentation of FIG. 13 There is an even greater variety of possibilities for changing teeth in order to obtain a very wide variety of embossing patterns. Only the structurings of the tooth base can be used for embossing alone.

It should be noted that all teeth with macrostructures and microstructures are intended to be the metallised or treated surface of the film change, in contrast to the tooth spaces at the location of the logos, which do not change the surface of the film.

From the description of the surface structures of the rolls as well as macrostructures and micro-structuring of the teeth it can be seen that the embossing rolls are made of metal.

Claims (16)

1. Device for satinizing and embossing packaging foils, comprising a first, a second, and a third embossing roller (R1, R3, R2), the first embossing roller (R1) being in rolling contact with each of the second (R2) or third (R3) embossing roller and the packaging foil (9) being capable of being passed under pressure between the first and the second and between the first and the third embossing roller in order to produce a satin-finish and a pattern, the first embossing roller (R1) having a tooth array arranged in a basic grid (GR, GR1) and composed of homogenously arranged individual teeth (5, 35), and the other two embossing rollers (R2, R3) having a surface structure that differs from that of the first embossing roller, characterised in that at least one of the other two embossing rollers (R2, R3) has a surface structure (A, B, B, G, H, J; Q, R, S, X, Y, Z) with structural elements (11, 13, 15, 16; 17, 18, 19, 21) that are arranged individually or in groups but not in the same basic grid (GR, GR1) as on the first embossing roller, the structural element (11, 13, 15, 16; 17, 18; 19, 21) consisting of individual teeth (5, 35) or of a continuously formed ridge (19, 21) or of a combination of these two configurations, and the teeth and/or ridges having a mutual spacing that differs from the basic grid, and the structural elements being arranged circularly, longitudinally, or helically on the second and/or third embossing roller (R2, R3).
2. Device for satinizing and embossing packaging foils, comprising a first and a second embossing roller (R31, R2), the two embossing rollers being in rolling contact with one another and the packaging foil (9) being capable of being passed under pressure between the first and the second embossing roller in order to produce a satin-finish and a pattern, the first embossing roller (R1, R31) having a tooth array arranged in a basic grid (GR, GR1) and composed of homogenously arranged individual teeth (5, 35), and the other embossing roller (R2) having a surface structure that differs from that of the first embossing roller, characterised in that the second embossing roller (R2) has a surface structure (A, B, B, G, H, J; R, S, X) with structural elements (11, 13, 15, 16; 17, 18, 19, 21) that are arranged individually or in groups but not in the same basic grid (GR, GR1) as on the first embossing roller, the structural element (11, 13, 15, 16; 17, 18; 19, 21) consisting of individual teeth (5, 35) or of a continuously formed ridge (19, 21) or of a combination of these two configurations, and the teeth and/or ridges having a mutual spacing that differs from the basic grid, and the structural elements being arranged circularly, longitudinally, or helically on the second embossing roller (R2).
3. Device according to claim 1 or 2, characterised in that the second embossing roller (R2) provided with the surface structure (A, B) has longitudinal ridges (10) that are interrupted by circular structural elements formed of teeth arranged in one, two, or multiple rows (11, 13).
4. Device according to claim 3, characterised in that the third embossing roller (R3) provided with the surface structure (Q, R) has circumferential ridges (12, 14).
5. Device according to claim 4, characterised in that the third embossing roller (R3) has longitudinally arranged structural elements that are each formed of individual teeth (5, 35) and are arranged in one, two, or multiple rows (15, 16).
6. Device according to claim 3, characterised in that the second and/or third embossing roller (R2, R3) provided with the surface structure (G, H) has helically arranged structural elements that are each formed of individual teeth (5, 35) and are arranged in one, two, or multiple rows (17, 18).
7. Device according to claim 1 or 2, characterised in that the second embossing roller (R2) provided with the surface structure (H, J) has circumferential structural elements (19, 21) at variable spacings, the structural elements being arranged circularly (19) or helically (21), and the helical structural elements having the same or different angles.
8. Device according to claim 7, characterised in that the third embossing roller (R3) provided with the surface structure (Y, Z) has helically or longitudinally arranged structural elements (20, 22) in the form of ridges and the helical structural elements may have the same or different angles.
9. Device according to any one of claims 1 to 8, characterised in that the cross-section of the ridge (10, 12, 14, 19, 20, 21, 22) is outwardly tapered and flattened, the dimensions of the ridges and of the grooves therebetween corresponding to the dimensions of the teeth (5, 35) of the first, driven embossing roller (R1, R31), whereby all teeth engage in the grooves between the ridges.
10. Device according to any one of claims 1 to 9, for embossing marks whose appearance varies according to the viewing angle of the observer and/or the kind and/or the position of the lighting source, characterised in that the embossing teeth (5M1 - 5M3) of the first embossing roller (R1, R31) which produce the changing marks have another geometrical shape than the teeth (5, 35) that are intended for satinizing.
11. Device according to any one of claims 1 to 10, for embossing authentication and identification features, characterised in that the surfaces of the embossing teeth (5S1 - 5S6; 5M1 - 5M3) and/or locations on the tooth bottom (ZG) of the embossing roller (1) are provided with microstructures (20 - 22, 26 - 33; 23 - 25).
12. Device according to claim 11, characterised in that the microstructures comprise ridges (30, 32) or grooves (33) arranged in the manner of a grid at spacings of less than a micrometre up to 30 micrometres.
13. Device according to claim 11, characterised in that the geometrically modified embossing teeth (5M1 - 5M3) have a smaller height than the remaining teeth.
14. Device according to one of claims 11 or 13, characterised in that the geometrically modified embossing teeth (5M1 - 5M3) have a different flank or edge shape than the remaining teeth.
15. Method for satinizing and embossing packaging foils by means of a device according to claim 1, characterised in that the packaging foil (9) that consists of metallized or surface-treated or aluminium coated paper passes through a first embossing roller pair (R1, R31; R2) and subsequently through a second embossing roller pair (R1, R31; R3), the metallic or surface-treated layer of the foil facing the first embossing roller (R1, R31) and at least one embossing roller pair (R1, R31; R2) having a non-homogenous grid pattern of the surface structure (A, B, B, G, H, J; Q, R, S, X, Y, Z) that differs from the basic grid of the first embossing roller (R1, R31) in order to achieve an effective breaking of the paper fibres, the different grid pattern comprising teeth and/or ridges at spacings that differ from the basic grid.
16. Method for satinizing and embossing packaging foils by means of a device according to claim 2, characterised in that the packaging foil (9) that consists of metallized or surface-treated or aluminium coated paper passes through the embossing roller pair (R1, R31; R2), the metallic layer of the foil facing the first embossing roller (R1, R31) and the embossing roller pair (R1, R31; R2) having a non-homogenous grid pattern of the surface structure (A, B, B, G, H, J; R, S, X) that differs from the basic grid of the first embossing roller (R1, R31) in order to achieve an effective breaking of the paper fibres, the different grid pattern comprising teeth and/or ridges at spacings that differ from the basic grid.

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