EP2399732A1 - Device for embossing films - Google Patents

Abstract

The device (1) has an embossing roller (2L) or a counter-roller (3) driven by a drive (6). The embossing roller comprises teeth (5, 5B) projected from a base cylinder and driving the counter-roller. The teeth or ridges are provided in a logo area (8A) and paper, synthetic or hybrid foils e.g. packaging foils. A diameter of a portion of the embossing roller is in a range of 0.02 to 0.20 mm over an axial length that is equal to width of the foils. The diameter of the portion of the embossing roller is less than a diameter of another portion of the embossing roller.

Description

The present patent application relates to a device for embossing films of all kinds according to the preamble of claim 1 and to uses of the device for embossing packaging films for cigarettes and wrapping films with reinforced areas, e.g. for boxes. The films to be used may be made of paper, plastic or hybrid films in which e.g. sputtered metal layer located between plastic and / or paper layers, or consist of metal or be provided with a metal layer. They can be used for so-called. Innerliner, for cigarette mouthpieces or for the packaging of boxes or the like. In the following, the term "foil" is used in a simplified manner for all these different types of foil.

When imprinting logos of any kind on foils in the pin-up - pin-up process, i. By means of protruding from the cylinder circumference teeth on the embossing roll and also outstanding teeth, rings or ribs on the counter roll, there are basically two methods. In the usual process, the logos are made by removing or changing the teeth involved in the embossing roll and the remaining teeth are used for satining. In a second production only teeth are made on the embossing roll, where the logos are provided. In the remaining places teeth may be present, which serve the drive and the stability of the rollers.

Both methods have in common that, especially with larger gaps, the film is not uniformly embossed over the entire width, since the pressure on the film is not the same, whether teeth mesh or teeth one roller are opposite to vacancies on the other roller.

It is therefore an object of the present invention to provide a device for embossing films, regardless of the embossing process and presence of the teeth in the logo area or arrangement of rings or ribs on the rollers and regardless of the nature and structure of the film is always a uniform embossing on the entire width of the film allowed. This device is defined in independent claim 1.

Other objects and advantages, such as that the wrapping films can also receive embossed reinforcements in critical areas is indicated in the dependent claims.

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

Fig. 1

zeigt schematisch und in perspektivischer Sicht die wesentlichen Teile einer ersten Vorrichtung für das positive Prägen von Logos gemäss Erfindung mit zwei Walzen,

Fig. 1A

zeigt eine Ausführungsvariante der Vorrichtung von Fig. 1,

Fig. 2

zeigt eine zweite Vorrichtung für das positive Prägen von Logos gemäss Erfindung mit drei Walzen,

Fig. 3

zeigt eine Ausführungsvariante der Vorrichtung von Fig. 2,

Fig. 4

zeigt schematisch und in perspektivischer Sicht eine weitere Ausführungsform der Erfindung mit drei Walzen,

Fig. 5

zeigt eine Variante zum Beispiel von Figur 4,

Fig. 6

zeigt ein weiteres Ausführungsbeispiel der erfindungsgemässen Vorrichtung,

Fig. 6A

zeigt im Schnitt ein Synchronisationsgetriebe von Figur 6,

Fig. 7

zeigt eine Variante zum Beispiel von Figur 6,

Fig. 8

zeigt ein weiteres Ausführungsbeispiel der Vorrichtung von Fig. 4,

Fig. 9

zeigt eine Variante zum Beispiel von Figur 8,

Fig. 10

zeigt ein weiteres Ausführungsbeispiel der Vorrichtung von Fig. 4,

Fig. 11

zeigt eine Variante zum Beispiel von Figur 10,

Fig. 12

zeigt eine weitere Variante zu Figur 10,

Fig. 12A

zeigt im Schnitt ein Synchronisationsgetriebe der Anordnung von Figur 12,

Fig. 13

zeigt eine Ausführungsvariante zu Fig. 1,

Fig. 14

zeigt eine Ausführungsvariante zu Figur 2,

Fig. 15

zeigt eine erfindungsgemässe Vorrichtung zum negativen Prägen von Logos, mit drei Walzen,

Fig. 16

zeigt eine Ausführungsvariante zu Fig. 15,

Fig. 17

zeigt eine Ausführungsvariante zu Fig. 1 mit Synchronisationsgetriebe,

Fig. 17A

zeigt die Vorrichtung von Fig. 17 von Unten,

Fig. 18

zeigt eine Ausführungsvariante zu Fig. 17 mit Synchronisationsgetriebe und Logos auf beiden Walzen,

Fig. 18A

zeigt die Vorrichtung von Fig. 17 von Unten,

die Figuren 19A - 19E bis 25A - 25D

zeigen jeweils mögliche Ausführungsformen von Prägewalzen, dabei zeigen

die Figuren 19A - 19E

Ausgestaltungen der Prägewalze der Figuren 1, 4, 5, 8, 10, 11, 12,

die Figuren 20A - 20E

Ausgestaltungen der Prägewalze der Figuren 2, 3, 6, 9,

die Figuren 21A - 21E

Ausgestaltungen der Prägewalze der Figur 13,

die Figuren 22A - 22E

Ausgestaltungen der Prägewalze der Figur 14,

die Figuren 23A - 23E

Ausgestaltungen der Prägewalze der Figur 15,

die Figuren 24A - 24E

Ausgestaltungen der Prägewalze der Figur 16,

die Figuren 25A - 25D

Ausgestaltungen einer Prägewalze,

Fig. 26

zeigt eine umhüllte Schachtel mit Logo und verstärkten Rändern, wobei die Umhüllung mit Walzenanordnungen gemäss den Figuren 19 und 20 geprägt wurden,

Fig. 27

zeigt eine dreieckige Schachtel mit Logo und verstärkten Rändern, wobei die Umhüllung mit Walzenanordnungen gemäss den Figuren 21 und 22 geprägt wurden,

Fig. 28

zeigt eine weitere umhüllte Schachtel mit Logo und verstärkten Rändern, wobei die Umhüllung mit Walzenanordnungen gemäss den Figuren 21 und 22 geprägt wurden,

Fig. 29

zeigt eine Ausführungsvariante zu Fig. 26, wobei die Umhüllung mit Walzenanordnungen gemäss Figur 23 geprägt wurden,

Fig. 30

zeigt eine Ausführungsvariante zu Fig. 27, wobei die Umhüllung mit Walzenanordnungen gemäss Figur 24 geprägt wurden, und

Fig. 31

zeigt eine Ausführungsvariante zu Fig. 28, wobei die Umhüllung mit Walzenanordnungen gemäss Figur 24 geprägt wurden.

Both FIGS. 1 to 16 gives the second number an indication of the associated figure of an embodiment.

Fig. 1

shows schematically and in perspective the essential parts of a first device for the positive embossing of logos according to the invention with two rollers,

Fig. 1A

shows an embodiment of the device of Fig. 1 .

Fig. 2

shows a second device for the positive embossing of logos according to the invention with three rollers,

Fig. 3

shows an embodiment of the device of Fig. 2 .

Fig. 4

shows schematically and in perspective view another embodiment of the invention with three rollers,

Fig. 5

shows a variant of, for example FIG. 4 .

Fig. 6

shows a further embodiment of the device according to the invention,

Fig. 6A

shows in section a synchronization gear of FIG. 6 .

Fig. 7

shows a variant of, for example FIG. 6 .

Fig. 8

shows a further embodiment of the device of Fig. 4 .

Fig. 9

shows a variant of, for example FIG. 8 .

Fig. 10

shows a further embodiment of the device of Fig. 4 .

Fig. 11

shows a variant of, for example FIG. 10 .

Fig. 12

shows another variant too FIG. 10 .

Fig. 12A

shows in section a synchronization gear of the arrangement of FIG. 12 .

Fig. 13

shows an alternative embodiment Fig. 1 .

Fig. 14

shows an alternative embodiment FIG. 2 .

Fig. 15

shows an inventive device for negative embossing of logos, with three rollers,

Fig. 16

shows an alternative embodiment Fig. 15 .

Fig. 17

shows an alternative embodiment Fig. 1 with synchronization gear,

Fig. 17A

shows the device of Fig. 17 from underneath,

Fig. 18

shows an alternative embodiment Fig. 17 with synchronization gear and logos on both rollers,

Fig. 18A

shows the device of Fig. 17 from underneath,

Figs. 19A-19E to 25A-25D

each show possible embodiments of embossing rollers, show it

Figures 19A-19E

Embodiments of the embossing roll of FIGS. 1 . 4 . 5 . 8th . 10 . 11, 12 .

Figures 20A-20E

Embodiments of the embossing roll of FIGS. 2, 3 . 6 . 9 .

FIGS. 21A-21E

Embodiments of the embossing roll of FIG. 13 .

Figures 22A-22E

Embodiments of the embossing roll of FIG. 14 .

Figures 23A-23E

Embodiments of the embossing roll of FIG. 15 .

Figures 24A-24E

Embodiments of the embossing roll of FIG. 16 .

Figures 25A-25D

Embodiments of an embossing roll,

Fig. 26

shows a wrapped box with logo and reinforced edges, the envelope with roller assemblies according to the Figures 19 and 20 were coined

Fig. 27

shows a triangular box with logo and reinforced edges, the envelope with roller assemblies according to the Figures 21 and 22 were coined

Fig. 28

shows another enveloped box with logo and reinforced edges, the wrapper with roller assemblies according to the Figures 21 and 22 were coined

Fig. 29

shows an alternative embodiment Fig. 26 , wherein the enclosure with roller arrangements according to FIG. 23 were coined

Fig. 30

shows an alternative embodiment Fig. 27 , wherein the enclosure with roller arrangements according to FIG. 24 were coined, and

Fig. 31

shows an alternative embodiment Fig. 28 , wherein the enclosure with roller arrangements according to FIG. 24 were coined.

The embossing of so-called inner liners for packing a number of cigarettes, for example 20 pieces, by means of a pin-up

Pin-up configuration mentioned embossing roll arrangement is known from a large number of patents and patent applications of the same applicant, such as from the U.S. 5,007,271 . U.S. 6,176,819 or US-7,036,347 , By definition, the teeth, rings or ribs project beyond the base cylinder defined by the valleys between the teeth, rings or ribs. Because of the lowering S described below, therefore, two basic cylinders per embossing roller. The embossing units described therein have in common that they have at least one pair of rollers, of which the first roller is driven by a drive, for example via a belt from the plant or by a separate motor, and this driven roller over the teeth via the intervening film Counter roll (s) drives.

In these devices, the metallised surface of the film is satinized, i. provided with a very large number of small indentations, which cause a diffuse reflection of the incident light. By omitting or altering teeth, a logo is created, either as part of the non-embossed, glossy film surface or as embossed film surface parts, which show different optical effects depending on the incidence of light.

In addition, from the WO-02 / 076716A1 or EP-2 027 994A2 of the same applicant, an embossing unit is known, which consists of three rollers, wherein in the case that all three rollers have teeth, the driven roller drives the two counter-rollers or the rollers are connected to each other via a synchronization means.

In principle, there are essentially two methods to emboss logos, where logos are all characters, words, decoration or reinforcement elements meant: First, the embossing of logos in an environment that as is defined by satin removal, whereby by removing or changing teeth either the original film surface appears or such a modified surface arises there, the aspect of which changes depending on the lighting conditions. Here one can speak of a negative embossed logo.

On the other hand, the logo can be characterized by teeth, which are arranged in a non-embossed environment, so that can be spoken of a positive logo embossing.

The Figures 19A-19E to 22A - 22E and 25A-25D provide examples of the positive embossing and the Figures 23A-23E and 24A - 24E represent examples of the negative embossing.

The device 1 according to Fig. 1 assumes a pin - up - pin - up configuration proven for embossing inner liners, in which the two rolls 2L and 3 have teeth 5 and 5B projecting from the surface, in which case one tooth of a roll engages between four teeth of the other rolls, whereby a self-synchronization is achieved and the embossing more precise and the drive is simplified. The first roller 2L is driven by a drive 6 shown symbolically, wherein the drive can also be a motor.

According to Fig. 1 In the device 1, two rolls are used for embossing a foil strip 7, see FIG. 41. The roller 6 driven by drive 6 contains logos 8, which may be rows or rows, or a word, here LOGO. Outside the logo area 8A is located on both sides of an edge zone 9, which according to the Fig. 1 and 1A Teeth 5 has to transmit the driving force better to the counter-rollers. The LOGO logo is formed here of teeth 5, while the reinforcing lines 25 and rows 26 are formed of teeth 5B, whose distance from each other, the so-called. Pitch, is greater than between the teeth 5. The counter-roller 3 has only teeth 5 on. This embossing arrangement is equipped for positive embossing.

Essential to the invention for all embossing rolls and for both types of embossing is, see also Fig. 19 , a sink S, ie a reduced diameter part, said sink S extends over the logo area 8A with an axial length S _d , which is greater than the width 7 _{d of} the film 7. The greater length depends on the embossing process and the film from. The depth of the dip may be between 0.02 and 0.20 mm for a packaging film.

Based on FIGS. 1 to 18 and 19 to 25 can be easily deduced that through the sink S, the pairs of rollers, whether one or two counter roll (s), always on the edge zones 9 are engaged with each other and that regardless of the arrangement of the logos, or the number of teeth in the Logo area, the pressure distribution on the film is always uniform, since the pressure fluctuations of the rollers are always absorbed by the margins on both sides of the logo area.

This sink S causes a completely uniform embossing of the film over its entire width and thus a much better appearance and thus a much more precise embossing.

In contrast to the embossing rollers for embossing innerliners according to the prior art, see also the FIGS. 15, 16 . 23 . 24 According to the invention, where the logos are obtained by either completely removing or modifying the teeth at these points, and by using the other teeth to satin, the so-called positive embossing of wrapping films on the corresponding embossing roll only there teeth present, where should be marked with the formed of a number of teeth logos.

When satinizing and at the same time negatively embossing logos on innerliners, the metallized surface of the packaging film is embossed, so that in almost all cases the driven roller has the logos, while in embossing film wrapping it may be advantageous to place the logos on one of the non-driven embossing rollers to get positively outstanding logos, see Figure 1A In this device 1A, the non-driven roller, the embossing roller 3L, the logos. In this case, the embossing roller 3L has a double circumference of the driven roller 2F. A comparison of the driven embossing roller 2L with the non-driven embossing rollers 3L shows that the logos on the driven embossing roller 2L are mirror-inverted to the logos on the non-driven embossing roller 3L.

In the following, all rolls with logos and / or reinforcing lines and rows and optionally with isolated teeth are defined as embossing rolls, while the other rolls, whether driven directly or indirectly or via synchronizing means, are defined as counter-rolls. However, this does not exclude that even more than one roller of a device may have logos, see Fig. 18 , In addition, it is assumed that the film strip is always performed in the same orientation with respect to one side between the rollers.

In the embodiments according to the FIGS. 1 to 3 the teeth 5 of the driven roller and the counter roller as well as the edge zones 9 and possibly also the letterings are shown in a pyramidal shape with a square outline, the tips of which may be flattened by up to 25%. However, there are still a number of other pyramidal teeth with a variety of other plans and shapes possible, such as pyramidal teeth with a rectangular plan, for example, in the direction of the longitudinal axis have a greater length of its base than in the other direction. The sides of the teeth need not necessarily be orthogonal to the longitudinal axis of the roll and may include any angle between 1 ° and 89 °. The teeth may have a pitch, ie a pitch = pitch between the tips, of 0.05 mm to 0.4 mm, at a theoretical height without flattening of 0.03 mm to 0.3 mm. Finally, the teeth may also have a round cross-section and a conical profile, which, however, causes synchronization means between the rollers.

The teeth 5B, which occur for example in the logo lines 25 and log rows 26, have a larger pitch of, for example, 0.5 to 0.8 mm, i. they have a greater distance from tip to tip than the teeth 5. This allows further design options.

Furthermore, individual teeth or groups of teeth, as known from the already cited prior art, may be designed differently. As already described several times in the cited prior art, the rollers can be mounted such that they can be deflected to a certain extent in all three coordinate directions. However, for certain applications, particularly in the rapid passage of the films, a rigid arrangement of the roll axes is desired.

The FIGS. 2 to 14 show three-roll devices, wherein those with teeth on all three rolls of the U.S. 6,715,411 of the same applicant.

Device 24 of Fig. 2 shows a driven roller 2L with logos in the form of logo lines 25 and rows 26 of teeth 5B and a lettering 8 of teeth 5, which are arranged in the logo area 8A. The depression S extends over the entire circumference. Both counter rollers 3 and 4 have regularly arranged teeth 5.

Device 24A of Fig. 3 shows a driven roller 2F and a non-driven embossing roller 4L with, for example, the same logos as on embossing roller 2L in FIG Fig. 2 ,

In the FIGS. 4 to 14 are embodiments of the WO-02/07671 the same applicant has been adapted according to the invention. Device 40 shows three rollers, the same embossing roller 2L as in the preceding examples, which cooperates with a first counter roller 41 and a second counter roller 42, wherein the first roller 2L is driven by a drive 6, while the two counter rollers, neither driven nor with the driven roller via synchronization elements, such as gears are synchronized, but here are driven only via the film strip 7.

In deviation from the previous examples, the three embossing rollers do not have the same structure. The driven embossing roll 2L is according to the embodiment FIG. 4 the same as before, while the first counter roller 41 is provided with grooves 43 which run around the entire circumference and are arranged parallel to each other such that the teeth 5 of the embossing roller 2F engage in the grooves. The resulting between the grooves 43 rings 44 are also tapered towards the outside and flattened so that they engage between the truncated pyramidal teeth 5 and 5B. Analogously, the second counter-roller 42 has longitudinal ribs 45 which, like the rings 44, also taper outwards and are flattened in such a way that the longitudinal ribs 45 cooperate with the teeth 5 of the embossing roller 2. The rings or longitudinal ribs can influence the appearance of the embossing pattern produced by the embossing roller with teeth. With such embossing roller assemblies, it is possible to produce various embossing patterns or characters by varying the teeth 5 and 5B or the rings 44 or the longitudinal ribs 46, ie by changing the height, flanks or edges of the teeth, rings or longitudinal ribs or patterning of their upper surface.

In FIG. 4 or 5 It is indicated that the two counter rollers are engaged with the embossing roller 2L, but this is not necessarily always the case. It is also conceivable that the first or second mating roller is only engaged with the first or preceding roller or can be brought into engagement. Moreover, it may be advantageous to provide more than a total of three embossing rollers for certain applications, which have a different surface structure. Furthermore, both the diameter and the length of the individual rolls may be different. In addition to the metal rollers and soft counter-rollers can be used.

In FIG. 5 can be seen a second device 46 with the same embossing roller 2L and the counter-rollers 41 and 42 with the rings, or longitudinal ribs, wherein the order of the counter-rollers with respect to the order according to FIG. 4 is reversed and seen in the running direction of the material 7, here first the counter-roller with the longitudinal ribs engages and then the counter-roller with the rings.

In the embodiment according to FIG. 6 the device 47 has a driven roller 2F and, as in FIG FIG. 4 , as a second roller, the counter-roller 41 with the rings 44. The subsequent embossing roll 4L is similar to that shown in FIG Fig. 2 , In the Figures 6 and 6A It is shown how the rollers 2, 41 and 4A are positively synchronized by the gears 48, 49, 50. Forced synchronization is particularly appropriate if the material warps during embossing.

As a variant to FIG. 6 is the device 51 according to FIG. 7 illustrated, wherein the embossing roller 2L cooperates with the counter-roller 3 and the ring roller 41. In the device 52 according to Fig. 8 the two counter-rollers are reversed, the rollers of these two versions are not necessarily synchronized.

In FIG. 9 In the device 53, a combination of the drive roller 2F with the embossing roller 3L and the longitudinal rib roller 42 is shown which does not require forced synchronization.

In the Figures 10 and 11 In the device 54, the first roller is the embossing roller 2L and the second roller is the toothed roller 3 from the preceding examples, while the third roller, in deviation from the preceding examples, is a rubber roller 55 with a comparatively smooth surface , In the device 56 according to FIG. 11 the order of rolls 3, 4 and 55 is reversed.

In the Figures 12 and 12A is a variant for the execution of FIG. 10 shown, wherein in the device 58, the embossing roller 2L and toothed roller 3 have the same toothing 5, ie have a pin up-pin-up configuration and the two counter-rollers 3 and 55 are positively synchronized via a gear with the gears 48, 49 and 57.

From these examples, variations are conceivable: Thus, the rubber roller 55 may be used instead of the ring roller 41 or the longitudinally ribbed roller 42. In the figures, the bearings, or the two yokes 6A, which receive the two bearings are also schematically drawn. This is also indicated that the bearings of the roll axes can be done individually, in groups or together. Again, the embossing rollers need not be of the same diameter and length, but in deviation from the first example, the diameters of the rollers, if not equal, must be in an integer relationship if the synchronization is by gears, while the length can be individual.

Fig. 13 provides a variation Fig. 1 in which all teeth of the device 59 are the same teeth 5. The Fig. 14 is a variation of Fig. 9 in that in this device 60 all teeth are the same teeth 5 and the roller 42 has longitudinal ribs 44. From the FIGS. 13 and 14 in comparison to the FIGS. 1 and 9 further possible variations result in that different teeth, eg 5 and 5B, can be arranged on the same roller.

Fig. 15 FIG. 10 illustrates a three-roll system 61, which is well known in the art, in which all teeth 5 are the same and the logos are made on the driven roll by omitting or modifying teeth. In contrast to the prior art, here too the embossing roll 2L has the depression S.

Fig. 16 provides a variation Fig. 15 by the embossing roller 2L of device 62 in the logo area 8A teeth 5B with a larger pitch arranged to lines 25 and lines 26.

Device 63 is in Fig. 17 from above and in Fig. 17A shown from the bottom and shows a two-roller system as in the Figures 1 and 1A , Since only a relatively small lettering is used as the logo 8 in the large logo area 8A without teeth, a synchronization of the two rollers 2L and 3 is required to facilitate the replacement of the film rolls. The depression S extends over the entire circumference of the roller 2L. Both rollers 2L and 3 are synchronized via a gear 64, 65 and are intended for positive embossing. Both rollers have the same teeth 5. This also applies to the logo 8.

Device 63A of Figures 18 and 18A shows as a variant of the device 63 of Fig. 17, 17A a two-roll system with two embossing rollers 2L and 3L. The two logo areas 8A with the lettering 8 on each embossing roller each extend over a circumference of 180 ° and also the depression S extends over a circumferential area of 180 °, so that the film is always in a lowered area during embossing. This arrangement causes both negative and positive embossments can be generated in the same embossing process, whereby the design options are further increased.

That for the three-roll system according to Figures 2-16 The same applies mutatis mutandis to the two-roll system according to the Figures 17 and 18 , with the advantage of greater simplicity. If, in the case of particularly difficult material, there is a tendency to roll up after being treated with two rollers, a smoothing device, for example with smooth rubber rollers, can be connected downstream.

In the Figures 19A-19E to 25A-25D Different embodiments of embossing rollers according to the invention are shown schematically and not restrictively.

The embossing rollers 2La - 2Le the FIGS. 19A to 19E correspond to the driven embossing rollers of FIGS. 1 . 2 . 4, 5 . 7, 8 . 10 . 11, 12 , where in each case the roller 2La according to the Figure 19A is drawn. In Fig. 19A For example, the teeth 5 in the edge zones 9 are different from the teeth 5B with greater pitch of the lines 25 and rows 26, which serve either for decoration or as reinforcements in the case of wrapping foils. In Fig. 19A Furthermore, the film 7 is drawn in and it can be seen that the length S _{d of} the depression S is greater than the width 7 _{d of} the film.

According to Fig. 19B the logo area 8A is the same as in Fig. 19A However, 9 ribs 91 are arranged in the edge zones, which have the same distance as the teeth 5. In the embodiment of Fig. 19C the edge zones 9 consist of ribs 91 and the rows 25 and rows 26 of ribs 94 at a greater distance. In Fig. 19D the edge zones 9 consist of rings 51 with the same spacing as that of the teeth 5, while the lines 25 and rows 26 are as in FIG Fig. 19A consist of the teeth 5B. In Fig. 19E the fringes 9 are unstructured 52 and the rows 25 and rows 26 are as in FIG Fig. 19A consist of the teeth 5B.

The embossing rollers 3La, 4La - 3Le, 4Le the FIGS. 20A to 20E correspond to the counter roll 3L or 4L of Figures 1A . 3 . 6 . 9 , wherein in each case the roller 3La according to the Figure 20A is drawn. The design of the edge zones 9 and the logos 8, lines 25 and rows 26 is the same as in the FIGS. 19A to 19E ,

The embossing rollers 2Lf - 2Lk the FIGS. 21A to 21E correspond to the driven roller 2L of FIG. 13 wherein each of the roller 2Lf according to the Figure 21A is drawn. The design of the edge zones 9 is the same as in the FIGS. 19A to 19E while rows 25 and rows 26 have the same teeth 5 as the margins of Fig. 19A and the rows 25 and rows 26 consist of the fine ribs 91.

The embossing rollers 4La - 4Le the Figures 22A to 22E correspond with one exception of the counter roll 4L of FIG. 14 , wherein in each case the roller 4La according to the Figure 22A is drawn. The design of the edge zones 9, the logos, the lines 25 and rows 26 is the same as in the one with one exception Figures 21 , The exception concerns Fig. 22B , In this figure, the side edges of the teeth 5S of the logos 8 are rotated at an angle of, for example, 70 ° with respect to the longitudinal axis of the roller and also the character is arranged at an angle of 70 ° with respect to the longitudinal axis. This angle can be any value between 1 ° and 89 °.

The embossing rollers 2L1 - 2Lp the FIGS. 23A to 23E correspond to the driven roller 2L of FIG. 15 , with the ecxeption of Fig. 23B , The design of the edge zones 9 is the same as in the FIGS. 19A to 19E , This is the negative embossing, where no rows or rows are visible in the logo area, since all the teeth 5 are the same and only in the logo the teeth are omitted or changed. The roller 2Lm of Fig. 23B has teeth 5S whose edges enclose an angle of 70 ° with respect to the longitudinal axis and also the logo is arranged at this angle, as at Fig. 22B , When the roller 2Lo of Fig. 23C The satin background is made up of fine ribs 91. The embossing rollers 2Lq -2Lu the FIGS. 24A to 24E correspond to the driven roller 2L of FIG. 16 , with the ecxeption of Fig. 24B , This is also the negative embossing, where in the logo area lines 25 or rows 26 are visible, which consist of teeth 5B with a larger pitch. The remaining teeth 5, in particular around the logo, are the same as at the edge of FIG. 24A, wherein the teeth are omitted or changed in the logo. The edge zones 9 are the same as before. Analogous to the Figures 22B and 23B Both the teeth 5S and the teeth 5B and the lettering of Fig. 24B at an angle of, for example, 70 ° to the longitudinal axis.

The non-driven embossing rollers 3L1, m and 4L1, m the Figures 25A and 25B and the driven embossing rollers 2Lv and 2Lw show variants of logo arrangements. Here are the edges of the FIGS. 25A, B and C the fine ribs 91 and the edge zones 9 of Fig. 25C Teeth 5, as is the case with the logos. The logos of Figures 25B and 25D are arranged at an angle of 45 °.

The with the embossing rollers of the Figures 19-22 and 25 produced film according to the positive embossing is particularly suitable for wrapping objects other than cigarettes, especially where it matters that it does not warp and a cost embossing of various patterns, for example, on white paper is desired.

In the FIGS. 26 to 31 is shown as a further application of the inventive devices embossed films with logos and reinforcement zones as wrapping paper for boxes. At the same time, these reinforcement zones also have a decorative character, with the reinforcement rows and rows on the embossing rollers and thus the corresponding Reinforcement zones on the film need not have complete rows of teeth.

Embossing with the pin up - pin-up method of small indentations or elevations opens the possibility of relatively thin wrapping films for packaging cigarette boxes and boxes for high value goods such as watches, electronic parts, expensive medicines or foods such as chocolate or cheese with or without To use logos in the on-line procedure, which at the critical places, d. H. at the edges, where there is a risk that the film breaks, have reinforcing zones.

Characterized in that the film is embossed at these points with the inventive device, the risk of tearing is reduced. In addition, it is ensured by the very fine and exact embossing that after opening the original packaging this can not be closed unnoticed. This security is enhanced if the fine lettering and the like merge seamlessly after wrapping. For this it is important that the film does not warp after cutting.

One with one of the embossing rollers according to Figures 19 and 20 embossed film is according to the box 30 according to FIG. 26 arranged such that the reinforcing zones 31 and 32 embossed with the reinforcement rows and rows 25 and 26 are located at the edges of the box, wherein one or more sides may have logos 8.

The wrapping film for the boxes 33 and 34 of FIGS. 27 and 28 was with the one of the embossing rollers of Figures 21 and 22 and also shows reinforcing rows and rows 31 and 32 FIG. 27 is shown as a variant of a wrapping film around a triangular box 34, whose reinforcement zones 31 and 32 and logos 8 have been embossed with an embossing roll corresponding to the embossing roll FIG. 13 or 14 equivalent. In Fig. 28 In addition, a page is provided as an example with the Satiniermuster 8S.

The wrapping film for the box 35 according to Fig. 29 has a satin finish 8S and a logo 8, which on one of the embossing rolls according to FIG. 15 and 23 was obtained. There are no reinforcement rows or rows to be seen in this example.

The wrapping film for the boxes 36 and 37 of FIGS. 30 and 31 was using one of the embossing rollers of FIG. 24 and also shows gain rows and rows 31 and 32. In FIG. 30 is shown as a variant of a wrapping film around a triangular box 36, the reinforcing zones 31 and 32 and logos 8 were embossed with an embossing roll, the embossing roll according to FIG. 16 and 24 equivalent. The foil on box 37 of Fig. 31 Was also with an embossing roll according to the Figures 16 and 24 embossed. In addition to the logos 8 and the reinforcement zones 32, 32, the cover films have a satinization pattern 8S.

All disclosed rollers are also suitable for embossing innerliners for cigarettes or packaging films for other goods.

Claims (15)

A device for embossing foils, comprising at least one embossing roller and at least one counter-roller, wherein a roller is driven by a drive (6) and the rollers are formed in a configuration in which the teeth, rings or ribs protrude from the base cylinder, wherein at least the embossing roller (2L; 3L; 4L) has teeth (5, 5B, 5S) projecting from the base cylinder and at least partially serving to drive the counter-roller (s), characterized in that to achieve uniform embossing of the film over its entire width irrespective of the type and number of teeth (5, 5B, 5S, 5SB) or ribs (91, 94) in the logo area (8A) and type of foil, the embossing roll (2L, 3L, 4L) over a certain axial length ( S _d ) has a diameter smaller by 0.02 to 0.20 mm. Apparatus according to claim 1, characterized in that the axial length (S _d ) of the smaller diameter is selected such that it exceeds the width (7 _d ) of the film to be printed. Device according to claim 1, having an embossing roller, characterized in that the area of lesser diameter (S) extends over the entire circumference of the embossing roller. Apparatus according to claim 1 having two embossing rollers, characterized in that the region of smaller diameter (S) extends complementarily over half the circumference of the two embossing rollers. Device according to one of claims 1 to 4, characterized in that the embossing roller (2L, 3L, 4L) on both sides the region of lesser diameter each having an edge zone (9), which are always with the teeth (5, 5B, 5S, 5SB), rings (43) or ribs (45) of the counter roll (s) in engagement, or contact. Device according to one of claims 1 to 5, characterized in that the logos (8) of the embossing roller represent at least one lettering which is composed of individual teeth (5, 5B, 5S, 5SB), or by omitting or changing teeth (5 ) is formed. Apparatus according to claim 6, characterized in that the logos of the embossing roller reinforcing lines (25) and reinforcing rows (26) formed of individual teeth (5, 5B, 5S, 5SB) or ribs (91, 94), one of Teeth (5B, 5SB) have a greater distance from each other than the other teeth (5). Device according to one of claims 1 to 7, characterized in that the edge zones (9) teeth (5), ribs (91) and circumferential rings (92), or no toothing (93). Device according to one of claims 1 to 8, characterized in that the embossing roller (2L, 3L, 4L) with the counter-rollers (2F, 3, 4) via synchronization means (48, 49, 50; 57; 64, 65) are interconnected , Device according to one of claims 1 to 9, characterized in that the counter-roller with isolated teeth (5) or with circular ribs (43) or longitudinal ribs (45) is provided, wherein the ribs are flattened and whose cross section tapers to the outside, or the Counter roll (55) has a smooth surface. Device according to one of claims 1 to 10, characterized in that the teeth of the embossing roll for embossing logos (8) are pyramidally shaped with a rectangular or square plan or conical with a round cross-section and the edges of the pyramidal teeth (5) either orthogonal to the longitudinal axis the roller or at an angle (d) between 1 ° and 89 ° are arranged. Device according to one of claims 1 to 11, characterized in that at least one of the rollers is mounted such that it is deflectable in the longitudinal direction of the axis and / or in the pressing direction and / or in the running direction of the material to be embossed. Device according to one of claims 1 to 11, characterized in that the rollers are not mounted deflectable. Device according to one of claims 1 to 13, characterized in that individual teeth (5) of the embossing roller (2L, 3L, 4L) are changed in height or shape to give embossed characters whose appearance changes according to the viewing angle and illumination , Use of the device according to one of Claims 1 to 14 for producing a film (7) for wrapping an article (30, 33, 34, 35, 36, 37), the wrapping film being connected to the lines and rows of reinforcements (25, 26). arranged teeth of the embossing roller embossed reinforcing zones (31, 32) are cut so that the reinforcing zones are located at the edges of the article.

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