EP3184292A1 - Device for fine embossing of packaging materials with a set of embossing rollers of the male-female die type - Google Patents

Abstract

The embossing device for fine embossing of packaging material comprises a set of embossing rollers with die and Patrizenwalzen, wherein the structural elements (ML1) of the die roller (M1) the structural elements (PL1) of the Patrizenwalzen (P1) each associated with each other and the structural elements of the rollers independent of the structural elements of the other rolls are made. At least one structural element (ML1, PL1) of at least one roller (M1, P1) is provided with light scattering elements (DM1, D1) on its bottom surface (B1) and / or surface (S1) and / or lateral surfaces and / or in its immediate vicinity, the height (H) is 10 μm to 150 μm. By using light scattering elements with small dimensions, the contrast of the structural elements can be substantially increased, whereby the overall aesthetic image is considerably improved.

Description

The present invention relates to a device for fine embossing of packaging material with at least two embossing rollers, according to the preamble of patent claim 1.

Packaging films for the tobacco industry or for the food industry have been embossed for quite some time with embossing roll devices, wherein z. For example, so-called inner liners, which are wrapped around a number of cigarettes, or can act as packaging material for chocolate, butter or similar foods, electronic components, jewelry or watches.

The so-called inner liners initially consisted of pure aluminum foils, such as household foils, and these were characterized by the fact that they were carried out between two rolls, of which at least one roller had a relief, the so-called logos. Until about 1980, such a pair of rollers consisted in the majority of a steel roller on which a relief was formed and a counter-roller of a resilient material, such as rubber, paper or Plexiglas. By impressing the relief of the Patrizenwalze in the mating roll = die roll of the mirror image impression was prepared.

For more sophisticated logos, the relief of the patrone roller was transferred to a layer on the stencil roll and the recesses corresponding to the raised areas were etched out or otherwise worked out. Recently, lasers have been used for this engraving.

Since this production of die rollers for sophisticated logos is expensive, sat down from about 1980, after the registration of the US 5,007,271 by the same applicant, a so-called pin up pin-up system, wherein two identical steel rollers with a very large number of pyramidal teeth mesh in a side length at the bottom of 0.1 to 0.4 mm and emboss a running in-between innerliner. Logos are made with this device by wholly or partially removing teeth on a roller.

As a result, it has also been possible to produce the so-called satin, which has been caused by the large number of small depressions caused by the teeth are the previously shiny surface a dull and thus also more noble appearance.

Parallel to the development of embossing technology, or the production of embossing rollers, also a change in the packaging materials took place, the original all-metal aluminum foils were replaced by paper foils, the surfaces of which were coated with ever thinner metal layers for environmental reasons, with the last sputtered the metal layer , In more recent times, and also in the future, the metallization of inner liners will become even smaller or disappear altogether.

At the same time efforts are underway, packaged by the traditional packaging system cigarettes in inner liners and put this pack in a cardboard housing to get away, so-called soft packs, with only a wrapping film is provided, both functions, namely the moisturization of cigarettes and protection against external odors on the one hand and a certain stiffness for the mechanical protection of the cigarettes on the other.

The developments in the production of embossing rollers, in particular by the same applicant known, see, for example US Pat. No. 7,036,347 , have led to an ever-increasing amount of decorative effects on the innerliners and to a greater technical offer for promotional purposes, which has been used not only in the cigarette industry but also in the food industry. Recently, however, efforts are underway to reduce the advertising of tobacco products greatly or eliminate altogether, so that an imprint of the innerliner with promotional designs will not be possible to the extent possible. There are therefore increasingly sought ways to create new decorative effects without the use of conspicuous imprints, gold edges or the like ornaments.

It is also looking for new ways for product identification, which has been ensured until now, especially in globally cultivated brand names. Today come z. As so-called tactile effects are used, which are generated by special surface structures of the papers or special engravings. Textiles such as papers are provided with inflatable colors optimized for IR absorption which produce so-called pseudo-embossings. Sense of this technique can be a noticeable relief formation, for example, to create a velvety surface or a matte effect. When used for food-safe purposes, however, wetting techniques are questionable.

In tactile surfaces, the consumer identifies the product by his sense of touch. It may also result in braille usage or hidden security features. Tactile generated information can be read, for example, by means of laser beams through the surface-dependent reflectivity. There are also developments today that aim to create acoustically audible effects by painting the surface.

Another area of the tobacco industry deals with the cigarette itself, for example, with the mouthpiece, also called tipping.

The increasingly restrictive legislation on smokers, as well as the desire to produce other features such as tactile, acoustic or other optical features on the one hand and the ever-increasing variety of packaging materials such as aluminum foil, metal-coated papers, Tippingpapiere, hybrid films, plastic films, cardboard or semi-cardboard On the other hand, the conventional pin-up pin-up embossing rollers, in which both the driven roller and the counter-rollers have a large number of teeth, although continue to be fully and successfully used for embossing innerliners, but for the above Targets reach their limits.

Although known roller systems with a patrone roller with Patrizenstrukturen and a matrix roller with inversely congruent Matrizenstrukturen can extend the range of decorative elements, however, are very cost-intensive and, above all, time-consuming due to the pairwise manufacturing and sorting in the production, so that their production for an industrial Embossing of, for example, metallised inner liners is not suitable for the tobacco industry.

In addition, a fine embossing can be ensured only with a very large effort in the production of such rolls. In addition, in this case, when using a patrone roller and an inversely congruent die roller, the intervening film is squeezed during embossing so as to generate tensions in the transverse direction which are unacceptable to tobacco product papers. In addition, there is a hard-to-control limit for hole formation and very high pressures are required for a high-speed on-line method, with the stamping times in the millisecond range. Finally, there is a tendency to use thicker papers.

In the WO 2013156256 A1 of the same applicant is to solve the general problem to provide a method for producing a set of embossing rollers with which it is possible to carry out embossing for a variety of described surface structures of the specified materials of various kinds in the online operation of a packaging plant, proposed that in one Pater-Mater embossing roll system, the template surface structure is made independent of a previously generated or physically existing male surface structure.

For fine structures this statement is sufficient, because this production method allows a very wide variety of design options.

However, when dealing with relatively larger free formed surfaces of logos, their embossing with satisfactory aesthetic quality is problematic. In order for these surfaces to have the same reflectivity everywhere, for example with innerliners, the same minimum specific embossing pressure has to be applied everywhere. However, this is not possible without suitable measures if the smallest local deviations of the geometry between male and female rolls exist, which greatly vary the local embossing pressure. With too tight tolerances and high pressures, the embossing creates holes. High pressures can interfere with the sandwich structure of an innerliner, which at elevated temperatures leads to its degradation by creating a stain on the reverse side of the paper.

The in the EP 2 842 730 A1 Applicant's proposed solution to facet the surfaces and / or side surfaces of the logo provides a significant improvement in print quality for a number of substrates.

For certain paper documents, z. As colored paper, however, lead both the Pater - Mater structures and the structural elements with facets to a locally strong brilliance and thus to aesthetically disturbing effects.

It is on this state of the art starting task of the present invention to provide an embossing device with an embossing roller set with at least one cooperating Patrizen- and die rollers, which not only allows fine embossing for a variety of described surface structures of the specified materials of various kinds On-line operation of a packaging plant, but also the high-quality, eye-catching fine embossing of sophisticated logos, such. B. mythical creatures, letters and the like with visual emphasis by a gradation of brilliance from brilliant to matt to perform these logos or parts thereof, especially in colored papers to achieve an improvement of the aesthetic aspect of the logo and thus the overall picture.

In general, fine embossing with the pater-matter system is understood to mean that the contours of the fine embossing structures of the rolls have a linear total error in the axial and radial directions of less than +/- 10 μm and / or an angle error of less than 5 °.

Other objects and advantages will be apparent from the dependent claims and the description below.

Fig. 1

zeigt schematisch eine Prägevorrichtung mit einem Satz Prägewalzen mit einer Patrizenwalze und einer Matrizenwalze, die je mit einfachen einander zugeordneten Strukturelemente versehen sind,

Fig. 1A

zeigt in einer anschaulichen Darstellung von unten und oben eine Variante zum Patrizen- und zugeordneten Matrizen-Strukturelement von Fig. 1,

Fig. 1B

zeigt einen Schnitt durch zwei einander zugeordnete Strukturelemente von Fig. 1,1A,

Fig. 2

zeigt in einer Draufsicht ein Patrizen- und ein zugeordnetes Matrizen-Strukturelement,

Figs. 2A, 2B

zeigen schematisch jeweils einen Schnitt durch das Patrizen- und Matrizen-Strukturelement, das an ihrer Oberfläche, bzw. am Boden angeordnete Lichtstreuelemente aufweisen,

Fig. 3A

zeigt schematisch in einer Prinzipskizze einen vergrösserten Schnitt durch ein Patrizen- und zugeordnetes Matrizen-Strukturelement mit am Boden des Matrizen-Strukturelements angeordnete Lichtstreuelemente,

Fig. 3B

zeigt schematisch und in einem weiter vergrösserten Schnitt den Einfluss der Rauigkeit und Fabrikationstoleranzen auf die in Figur 3A dargestellten Lichtstreu- und Strukturelemente,

Fig. 4

zeigt ein Patrizen-Strukturelement, dessen Oberfläche mit Lichtstreuelemente versehen ist,

Fig. 4A

zeigt einen Schnitt durch das Strukturelement von Fig. 4 und einem zugeordneten Matrizen-Strukturelement ohne Lichtstreuelemente,

Fig. 5

zeigt ein Matrizen-Strukturelement, dessen Boden mit Lichtstreuelemente versehen ist,

Fig. 5A

zeigt einen Schnitt durch das Strukturelement von Fig. 5 und einem zugeordneten Patrizen-Strukturelement ohne Lichtstreuelemente,

Fig. 6

zeigt ein Patrizen-Strukturelement, dessen Umgebung mit Lichtstreuelemente versehen ist,

Fig. 6A

zeigt einen Schnitt durch das Strukturelement von Fig. 6 und einem zugeordneten Matrizen-Strukturelement ohne Lichtstreuelemente,

Fig. 7

zeigt ein Matrizen-Strukturelement, dessen Umgebung mit Lichtstreuelemente versehen ist,

Fig. 7A

zeigt einen Schnitt durch das Strukturelement von Fig. 7 und einem zugeordneten Patrizen-Strukturelement ohne Lichtstreuelemente,

Fig. 8

zeigt ein Patrizen-Strukturelement mit Seitenflächen, die mit Lichtstreuelemente versehen sind,

Fig. 8A

zeigt einen Schnitt durch das Strukturelement von Fig. 8 und einem zugeordneten Matrizen-Strukturelement ohne Lichtstreuelemente,

Fig. 9

zeigt ein Matrizen-Strukturelement mit Seitenflächen, die mit Lichtstreuelemente versehen sind,

Fig. 9A

zeigt einen Schnitt durch das Strukturelement von Fig. 9 und einem zugeordneten Patrizen-Strukturelement ohne Lichtstreuelemente,

Fig. 10

zeigt ein zweistufiges Patrizen-Strukturelement, dessen Umgebung mit Lichtstreuelemente versehen ist,

Fig. 10A

zeigt einen Schnitt durch das Strukturelement von Fig. 10 und einem zugeordneten Matrizen-Strukturelement ohne Lichtstreuelemente,

Fig. 11

zeigt ein mehrstufiges Patrizen-Strukturelement, dessen Umgebung mit Lichtstreuelemente versehen ist,

Fig. 11A

zeigt einen Schnitt durch das Strukturelement von Fig. 11 und einem zugeordneten Matrizen-Strukturelement ohne Lichtstreuelemente,

Fig. 12

zeigt ein Patrizen-Strukturelement, dessen Umgebung mit Lichtstreuelemente versehen ist,

Fig. 12A

zeigt einen Schnitt durch das Strukturelement von Fig. 12 und einem zugeordneten Matrizen-Strukturelement ohne Lichtstreuelemente,

Fig. 13

zeigt ein Patrizen-Strukturelement in Ansicht, das stellenweise und dessen Umgebung mit Lichtstreuelemente versehen ist,

Fig. 14

zeigt ein weiteres Patrizen-Strukturelement, das stellenweise mit Lichtstreuelemente versehen ist,

Fig. 15

zeigt ein Patrizen-Strukturelement mit einem erhabenen Stern, der stellenweise mit Lichtstreuelemente versehen ist, sowie eine Reihenanordnung von Lichtstreuelementen.

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

Fig. 1

shows schematically an embossing device with a set of embossing rollers with a male roller and a die roller, which are each provided with simple, mutually associated structural elements,

Fig. 1A

shows in a graphic representation of the bottom and top of a variant of the male and associated template structural element of Fig. 1 .

Fig. 1B

shows a section through two associated structural elements of Fig. 1.1A .

Fig. 2

shows in a plan view a male and an associated template structural element,

Figs. 2A, 2B

show schematically each a section through the male and female structural element having on its surface, or at the bottom arranged light scattering elements,

Fig. 3A

1 shows schematically in a schematic diagram an enlarged section through a male and associated female structural element with light scattering elements arranged at the bottom of the female structural element, FIG.

Fig. 3B

shows schematically and in a further enlarged section the influence of roughness and manufacturing tolerances on in FIG. 3A illustrated light scattering and structural elements,

Fig. 4

shows a Patrizen structural element whose surface is provided with light scattering elements,

Fig. 4A

shows a section through the structural element of Fig. 4 and an associated matrix structure element without light scattering elements,

Fig. 5

shows a template structural element whose bottom is provided with light scattering elements,

Fig. 5A

shows a section through the structural element of Fig. 5 and an associated male pattern element without light scattering elements,

Fig. 6

shows a Patrizen structural element, the environment is provided with light scattering elements,

Fig. 6A

shows a section through the structural element of Fig. 6 and an associated matrix structure element without light scattering elements,

Fig. 7

shows a matrix structure element whose surroundings are provided with light scattering elements,

Fig. 7A

shows a section through the structural element of Fig. 7 and an associated male pattern element without light scattering elements,

Fig. 8

shows a male structural element with side surfaces which are provided with light scattering elements,

Fig. 8A

shows a section through the structural element of Fig. 8 and an associated matrix structure element without light scattering elements,

Fig. 9

shows a template structural element with side surfaces provided with light scattering elements,

Fig. 9A

shows a section through the structural element of Fig. 9 and an associated male pattern element without light scattering elements,

Fig. 10

shows a two-stage Patrizen structural element, the environment is provided with light scattering elements,

Fig. 10A

shows a section through the structural element of Fig. 10 and an associated matrix structure element without light scattering elements,

Fig. 11

shows a multi-level Patrizen structural element, the environment is provided with light scattering elements,

Fig. 11A

shows a section through the structural element of Fig. 11 and an associated matrix structure element without light scattering elements,

Fig. 12

shows a Patrizen structural element, the environment is provided with light scattering elements,

Fig. 12A

shows a section through the structural element of Fig. 12 and an associated matrix structure element without light scattering elements,

Fig. 13

shows a Patrizen structural element in view, which is provided in places and its surroundings with light scattering elements,

Fig. 14

shows another Patrizen structural element, which is provided in places with light scattering elements,

Fig. 15

shows a Patrizen structural element with a raised star, which is provided in places with light scattering elements, and a series arrangement of light scattering elements.

FIG. 1 shows schematically and simplifies a structure of an embossing device with a Patrizenwalze P1 and a die roller M1, wherein the die roller is driven by a drive 1. The driving force from the stencil roll to the stamper roll is via a fine gear 2, 3. The stamper roll has some structural elements PL1, which are raised and the stencil roll has the Patrizen structural elements associated recessed structural elements ML1. The structures of the stencil roll are produced independently of the structures of the stamper roll, z. B. by means of a laser system and are therefore non-inversely congruent, giving them a better contrast. In the current state of the art, however, other manufacturing methods such as engraving, etching or milling are possible.

In the present embodiment, the surfaces S1 of the male pattern elements PL1 of the male pattern P1 and the bottoms B1 of the female pattern elements ML1 are provided with light scattering elements D1 and DM1.

Fig. 1A is a graphic depiction from below and above. In this embodiment, the structural elements PL1A and ML1A are L-shaped and both have the light scattering elements D1, DM1. Fig. 1 B shows a section through two associated structural elements, PL1, ML1 or PL1A, ML1A. For the sake of simplicity, the light scattering elements are designed here as square pyramids.

Out FIG. 2 It can be seen that the light scattering elements D2 of the male part in this example are flattened square base pyramids and have a tip distance E1, a foot width E2, and a height H1. The total height of the male pattern feature is H2. The masses for the light scattering elements DM2 of the matrix structure element ML2, E3, E4, H3, H4 are slightly different from those of the associated male pattern element.

The scattering effect of the light scattering elements creates a dull appearance at these spots. The resulting contrast with the environment increases the perception of the logo. The exact shape or dimension of the light scattering elements is not essential for the generated light scattering within certain limits, since they are at the Limit of perception for the human eye. Thus, instead of having a pyramidal shape, the light scattering elements may also be formed with a square or rectangular or other cross section, or they may be conical, semicircular, half moon or any other shape.

As will be apparent from the following descriptions of the figures, the light scattering elements may be located either only on the male structural elements or only on the female structural elements or on both structural elements, or on all or individual side surfaces of the structures, or around structures.

In deviation from the idealized representation of the light scattering elements in FIG. 2 are in FIG. 3A Although the structural elements and light scattering elements also shown schematically, but rather as real produced, ie taking into account the manufacturing tolerances. H1 denotes the total depth of the matrix structure element ML3, H2 _with the mean and H2 _max the maximum height of the light scattering elements N1 - N5. The total depth H1 moves in this example in a range of 250 microns and the average height of the light scattering elements by 50 microns. The total depth H1 of the template structural element can be between 25 μm and 400 μm. The associated male structural element PL3 is also indicated, the height of which is of the same order of magnitude as the depth of the female structural element.

In FIG. 3B the roughness of the roll steel as well as the manufacturing tolerances are shown on an enlarged scale by way of example. In this case, RF1 and RF2 denote the maximum roughness values of the matrix and male structure elements in μm, which are assumed here to be between 3 μm and 5 μm. H is the mean height of the light scattering elements N1 to N5, ie the arithmetic mean of all five elements assumed here is about 50 μm. N is an exemplary number of elements that may be the same or different in both coordinate directions.

1. a) Die Pressflächen an der obersten Fläche, siehe auch Fig. 2, müssen flach und genügend gross aber nicht zu gross sein, um einen brauchbaren Abdruck zu gewährleisten,
2. b) die Fussbreite = Querschnittsdurchmesser an der Basis der Lichtstreuelemente, bzw. Seitenlänge der Lichtstreuelemente, muss mindestens 10 µm betragen,
3. c) die Höhe Hk der Lichtstreuelemente soll zwischen 10 µm und 80 µm bei kleinen Schrittlängen = Pitch, bzw. Periode der Rasterung der Lichtstreuelemente von 80 µm und 200 µm; und
4. d) die Höhe Hg der Lichtstreuelemente zwischen 80 µm und 150 µm bei Schrittlängen zwischen 200 µm und 450 µm betragen;
5. e) die Anzahl der Lichtstreuelemente N in regelmässigen P/M-Strukturen muss mindestens gleich 2 pro Strukturelement sein, N = [2, 3, 4, .....],
6. f) die Höhen und Anzahl der Lichtstreuelemente in freien P/M Strukturen liegt je nach Designbedarf wie c) oder d) sowie e).

For the light scattering elements to meet the requirements, the following conditions must be met:

1. a) The pressing surfaces on the uppermost surface, see also Fig. 2 , have to be flat and big enough but not too big to guarantee a good impression
2. b) the foot width = cross-sectional diameter at the base of the light scattering elements, or side length of the light scattering elements, must be at least 10 μm,
3. c) the height Hk of the light scattering elements should be between 10 .mu.m and 80 .mu.m for small step lengths = pitch, or period of screening of the light scattering elements of 80 .mu.m and 200 .mu.m; and
4. d) the height Hg of the light scattering elements is between 80 μm and 150 μm at step lengths between 200 μm and 450 μm;
5. e) the number of light scattering elements N in regular P / M structures must be at least equal to 2 per structural element, N = [2, 3, 4, .....],
6. f) the heights and number of light scattering elements in free P / M structures are, depending on the design requirements, such as c) or d) and e).

$$\mathrm{Hg}=\mathrm{Rf}\mathrm{1}+\mathrm{H}+\mathrm{Rf}\mathrm{2}$$

H ist die mittlere Höhe (= arithmetisches Mittel gebildet aus allen zu N1, N2, ...gehörigen Höhen).Where: $$\mathrm{Hk}=\mathrm{Rf}\mathrm{1}+\mathrm{H}+\mathrm{<figure-callout\; id="2"\; label="Rf"\; filenames="imgf0001.png"\; state="\{\{state\}\}">Rf</figure-callout>}\mathrm{2}$$

$$\mathrm{hg}=\mathrm{Rf}\mathrm{1}+\mathrm{H}+\mathrm{<figure-callout\; id="2"\; label="Rf"\; filenames="imgf0001.png"\; state="\{\{state\}\}">Rf</figure-callout>}\mathrm{2}$$

H is the mean height (= arithmetic mean formed from all heights belonging to N1, N2, ...).

FIG. 4 shows a Patrizen-structural element PL4 on Patrizenwalze P4 with light scattering elements D4 on the upper side S4 and Fig. 4A a section along with the associated template structure element ML4 in the die roller M4 without light scattering elements.

FIG. 5 shows a template structure element ML5 in stencil roll M5 with light scattering elements D5 at the bottom B5 and in section the Fig. 5A with the associated patrix structure element PL5 on the patrone roller P5 without light scattering elements.

FIG. 6 shows a Patrizen-structural element PL6 on Patrizenwalze P6 without light scattering elements arranged around the structural element light scattering elements D6 and in section of Fig. 6A together with the associated die structure element ML6 in die roll M6 without light scattering elements.

FIG. 7 shows a template structure element ML7 in the stencil roll M7 without light scattering elements with arranged around the structural element light scattering elements DM7 and in section the Fig. 7A together with the associated patrix structure element PL7 on the patrone roller P7 without light scattering elements.

FIG. 8 shows a Patrizen-structural element PL8 on Patrizenwalze P8 with light scattering elements D8 on some side surfaces and in section the Fig. 8A together with the associated die structure element ML8 in the die roll M8 without light scattering elements.

FIG. 9 shows a template structure element ML9 in die roll M9 with light scattering elements DM9 on 3 sides and in section the Fig. 9A together with the associated patrix structure element PL9 on the patrone roller P9 without light scattering elements.

FIG. 10 shows a more complex patrix structure element PL 8 on the patrone roller P10. No light scattering elements are present on the uppermost surface S5, but on a lower level S6, light scattering elements D10 are arranged around the structures of the upper level. The associated die structure element ML10 in die roll M10 does not show any light scattering elements.

In FIG. 11 the male pattern element PL 11 on the patrone roller P11 has three levels S7, S8, S9, the top level S7 having no light scattering elements, the middle one

Level S8 light scattering elements D11 and the lowest level S9 again has no light scattering elements. The matrix structure elements ML11 in the stencil roller M11 have no light scattering elements.

According to FIG. 12 For example, the PL 12 patch structure element has various logos, with the innermost L12 logo also being colored. The light scattering elements D12 are arranged around the structural element PL12.

FIG. 13 shows another complex male pattern PL13 having multiple levels. The logos contain a circle L13, around which are several logos and light scattering elements D13 arranged around the male pattern element.

FIG. 14 shows another complex male PL14 structural element having multiple logos. In the middle area S10 there is a square L14, around it first a blank space, then light scattering elements D14, followed by an empty edge. Then, light scattering elements D14 are also arranged around the structural element.

FIG. 15 shows another Patrizen structural element PL 15 with a raised star LST, the arms are alternately provided with light scattering elements D15 and adjacent to the star webs R15 triangular profile, on which light scattering elements D16 are arranged. These structures are more visible in the adjoining magnifications.

As noted above, for the sake of simplicity, all light scattering elements have been drawn as square cross section pyramids, however, experiments have shown that a variety of other shapes, such as semicircular, half moon, or conical, may provide similar and possibly better results.

The in the FIGS. 13 to 15 shown Patrizen-structural elements correspond to the die roller associated with template structural elements.

Claims (8)

Embossing device for the fine embossing of packaging material with a set of embossing rollers with die and Patrizenwalzen, wherein each of the structural elements (ML1-15) of the die rollers (M1 - M15) the structural elements (PL1-15) of the Patrizenwalzen (P1-P15) are associated with each other and Structural elements of one of the rolls are produced independently of the structural elements of the other rolls, characterized in that at least one structural element (ML1-15; PL1-15) of at least one roll (M1-15, P1-15) is formed on its bottom surface (B1, B1A, B2, B5) and / or surface (S1-10) and / or side surfaces and / or in its immediate vicinity with light scattering elements (DM1-15, N [2, 3, 4, .....]; D1-16) is provided whose height (H) 10 microns to 150 microns and foot width is at least 10 microns. Embossing device according to claim 1, characterized in that the light scattering elements (DM1-15, N [2, 3, 4, ...]; D1-D16) are square base pyramids. Embossing device according to claim 1, characterized in that the light scattering elements are pyramids with a rectangular base, or conical, semi-circular, crescent-shaped, or have any other shape. Embossing device according to one of claims 1 to 3, characterized in that the light scattering elements (D4, D10, D11, D12) on the surface (S4, S6, S8) of the male pattern element (PL4, PL10, PL11, PL12) are arranged and the associated matrix structure element (ML4, ML10, ML11, ML12) has no light scattering elements. Embossing device according to one of claims 1 to 3, characterized in that the light scattering elements (N1-N5; DM5) are arranged on the bottom (B5) of the matrix structure element (ML3, ML5) and the associated male structural element (PL3, PL5 ) has no light scattering elements. Embossing device according to one of Claims 1 to 3, characterized in that the light scattering elements (D1, 1A, DM1, 1A; D2, DM2) are arranged both on the bottom (B1, B1A, B2) of the matrix structure element (ML1, ML1A, ML2). and on the surface (S1, S1A, S2) of the male pattern element (PL1, PL1A, PL2). Embossing device according to one of claims 1 to 6, characterized in that the environment of the structural elements (PL6, ML7, PL13, PL14, PL15) with light scattering elements (D6, DM7, D13, D14, D16) is provided. Embossing device according to one of claims 1 to 7, characterized in that the depth (H1), or height of the structural elements is 25 microns to 400 microns.

Images