EP1407896A1 - Film-like article with high security against forgery - Google Patents

Abstract

Different image patterns (12) are provided on each side of the object (10), each pattern comprising the same number of pixels (14,16) which are randomly arranged as dark and bright pixels of the same shape. The two patterns have a base region with an identical arrangement of pixels, and a selection region (30) with a predefined non-identical arrangement of pixels. When light is passed through the two overlaid patterns, the predefined image is formed in the selection region.

Description

The invention relates to a film-like object with on both sides arranged, in the transmitted light through superimposition to a predefined Additional parts of the picture.

The protection against counterfeiting of packaging is primarily for the pharmaceutical industry of great importance. Basically, however, there are also others Areas of desire for counterfeit-proof packaging or products, especially in the consumer goods industry, for example in packaging of food, cosmetic items, clothes, software and music CD's. Another area of application concerns counterfeit-proof documents, like banknotes and securities.

The film-like object with the forgery-proof image can be a packaging, a packaging material, a packaging aid, for example a label Safety part or a product itself.

A tamper-proof packaging or a packaging aid can guarantee originality serve, which enables the customer to recognize that that of product purchased by him is actually manufactured by the desired producer and has been packaged. A counterfeit-proof packaging aid can include also can be used as a first opening guarantee, for example in the form of a label, a banderole or a sealing strip etc. which e.g. over a bottle cap or over the closure of a wide neck jar over which Seam between a lid and a container or over the zipper of a bag have been set. When opening the corresponding Packaging will destroy the label, the banderole or the sealing strip and indicates that the first opening has already taken place. It is also possible, Fill or wrap items in an outer packaging, the outer packaging characteristic distinctive and difficult to copy Features that show that the packaging of the content at a certain suppliers.

Known forgery-proof packaging and products are on their surface provided with holograms or have color coding or invisible Characteristics on. To achieve a high level of security against counterfeiting in practice i.a. Proven holograms. Examples are hologram labels or cover foils with integrated holograms. The generation of holograms is associated with an enormous effort.

WO-A-00 00356 describes an object with an anti-counterfeiting security known surface area producing an optical effect. The surface area with the optical effect has at least two image patterns held at a fixed distance by a transparent layer of material on, and when the viewing angle changes, the optical changes Perception of the overall picture created by the superimposition of the picture patterns. The distance defined by the thickness of the transparent material layer between the image patterns and the distance between neighboring ones Image elements on which patterns are based are coordinated with one another in such a way that the image patterns show moiré interference.

EP-A-0 260 815 and US-A-5 488 664 disclose an object a first image pattern with high security against forgery and one with the object test film to be used made of a transparent material with a second image pattern to detect a fake image pattern. The two Image patterns are essentially random across the board (Randomly) arranged, light and dark picture elements of the same number constructed in the same shape and in a basic area with an identical arrangement of the picture elements and into a selection area with predefined, not identical arrangement of the picture elements divided. With congruent overlay of the two image patterns by precisely positioning the image pattern the test film over the picture pattern of the object will not be in the case of one fake image pattern in the selection area creates a predefined image. There a high level of security against counterfeiting on the one hand high print quality and print fineness or requires a high resolution, on the other hand, however, the exact Position the image pattern with increasing print fineness or with higher Counterfeit-proof objects of this type are more difficult to resolve set limits in practical use.

A security element known for banknotes is the division of a number in six parts, for example, with three parts on the front and on are printed on the back of the banknote so that when viewed in the Translucent the number as a whole is recognizable. The security against counterfeiting results here from the difficulty of an exact printing of the front and Back, which requires extremely precise register printing.

The invention is based, with a film-shaped object of the type mentioned at the outset to further increase the security against forgery. moreover the object should be able to be checked for authenticity in a simple manner.

In order to achieve the object according to the invention, increasing the Counterfeit protection on one side of the object a first surface area in the form of a first image pattern and on the second page the object a second surface area in the form of a second Image pattern is arranged, the two image patterns essentially blanket of light and dark, randomly arranged picture elements of the same number and shape are constructed, the two image patterns in a basic area with an identical arrangement of the picture elements and into a selection area with predefined, not identical arrangement of the picture elements are divided, and wherein the two Image patterns lie congruently one above the other in transmitted light and in Selection area generate the predefined image.

An essential prerequisite for achieving a high level of counterfeit security is of course a high print quality and print fineness or high print resolution. Together with an extremely precise register print can with the object according to the invention in comparison to the objects known from the prior art with a test film higher counterfeit security can be achieved.

In a preferred embodiment, form the sheet-like object two, four or six picture elements each picture element cells, one Have rotational symmetry with a rotation angle of 180 °, 90 ° or 60 °, wherein the light and dark picture elements in a picture element cell are rotationally symmetrical and are alternately arranged in the direction of rotation, the picture element cells with regard to their angular position at random in the Image patterns are arranged, and wherein the two image patterns in a basic area with identical arrangement of the picture element cells and in a selection area with a predefined, not identical arrangement with regard to their angular position of the picture element cells are divided.

For example, the light picture elements can be white and the dark picture elements To be black. But they can also be the same or different Colors built up. Another option is that the picture elements have a color that is only visible in UV or IR light and are therefore only visible in UV or IR light.

The image patterns are preferably printed on the object, the Image patterns for the congruent overlay expediently by means of Register pressure is applied to the object. The printing of the film-shaped The object is made using known printing processes. Instead of Conventional printing processes can of course also use other techniques such as. the laser coding method used to generate the image pattern become.

The predefined image generated by the image patterns in the selection area can for example a watermark, a number, a character, a font, a Logo or a halftone, but this list is not exhaustive.

A preferred area of application of the film-like material according to the invention The object lies in its use in the form of packaging, one Packaging material, a packaging aid, a security, a banknote, a Admission ticket or similar documents with high security against forgery.

The film-like object according to the invention can, for example, be any one Packaging material in the form of a packaging material or packaging aid be, with the invention according to both sides Patterns are applied. Examples of sheet-like materials are papers and plastic films, e.g. based on polyolefins, such as polyethylenes or polypropylenes, polyamides, polyvinyl chloride, polyesters, such as Polyalkylene terephthalates and especially polyethylene terephthalate. The Plastic-containing foils can be made of monofilms made of plastics, laminates two or more plastic films, laminates of paper and plastic films. The individual layers of the sheet-like materials can be by means of Adhesives, laminating adhesives, adhesion promoters and / or by extrusion coating, Coextrusion or lamination, etc. are fixed to each other. As Plastic films are preferred, non-oriented or axially or biaxially oriented Monofilms or laminates of two or more non-oriented or axially or biaxially oriented films made of plastics based on polyolefins, such as polyethylenes or polypropylenes, polyamides, polyvinyl chloride, Polyesters such as polyalkylene terephthalates and especially polyethylene terephthalate.

The packaging materials mentioned above can be those according to the invention Form objects in the form of packaging materials or packaging aids. For example, stamping and Sealing bags, sachets, wrappers, bags, etc. can be made. closures Openings, seams between a bottom part and the associated one Lids etc. can be used as packaging aids with the object according to the invention in the form of a label, a sealing strip, a banderole, a guarantee seal or an overlap. The latter Packing aids are usually in foil form and are placed on the corresponding one Container fixed over the opening and on the adjacent part of the container, such as glued, welded, crimped or shrunk on etc. The packaging aid has the image patterns according to the invention on.

As already mentioned, another area of application is besides the use of the sheet-like object according to the invention in the form of a Packaging, a packaging material or a packaging aid the manufacture of High-value securities, banknotes, tickets and the like Forgery.

- Fig. 1

eine erste Seite eines folienförmigen Gegenstand mit einem ersten Oberflächenbereich in der Form eines ersten Bildmusters;

- Fig. 2

die Rückseite des folienförmigen Gegenstand von Fig.1 mit einem zweiten Oberflächenbereich in der Form eines zweiten Bildmusters;

- Fig. 3

den Gegenstand von Fig. 1 bei Überlagerung der beiden Oberflächenbereiche mit den deckungsgleich aufgebrachten Bildmustern im Durchlicht;

- Fig. 4 - 8

Beispiele von Bildelementzellen.

Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawing; this shows schematically in

- Fig. 1

a first side of a sheet-like article having a first surface area in the form of a first image pattern;

- Fig. 2

the back of the film-like object of Figure 1 with a second surface area in the form of a second image pattern;

- Fig. 3

the object of Figure 1 when the two surface areas are superimposed with the congruently applied image patterns in transmitted light;

- Fig. 4 - 8

Examples of picture element cells.

A sheet-like object 10 shown in FIG. 1 is, for example Packaging film and has on one side 10a, for example on the front, a first surface area in the form of a first image pattern 12 on. The first image pattern 12 has a grid line pattern which corresponds to the Surface area covering a large number of square picture elements 14, 16 divided. 50% black picture elements 14 and white each Image elements 16 are arranged regularly in the drawing for the sake of simplicity. According to the invention, each form a black one in the present case and a white picture element 14, 16 with rotational symmetry with an angle of rotation of 180 ° or two black and two white picture elements 14, 16 with a picture symmetry with a rotation symmetry with a rotation angle of 90 °, the picture element cells 18 with respect to their angular position at random (randomly) arranged. The black picture elements 14 are, for example printed on the film surface, the white picture elements 16 show the unprinted film.

The back 10b of the film-shaped object 10 shown in FIG. 2 has a second surface area with a second image pattern 22. The second image pattern 22, like first image pattern 12, is a grid line pattern, which covers the second surface area in a variety of square picture elements 24, 26 divided. The gridline pattern of the The first image pattern 12 and the second image pattern 22 have identical dimensions on. In the present case, a black and a white form Picture element 24, 26 with a rotational symmetry with a rotation angle of 180 ° or two black and two white picture elements 24, 26 with a rotational symmetry with a rotation angle of 90 ° a picture element cell 28, the Pixel cells 28 with respect to their angular position at random are arranged.

The second surface area with the second image pattern 22 comprises one Selection area 30, which in the example shown the area of a letter T equivalent. The area of the second image pattern 22 outside the selection area 30 is referred to as the base area 32.

The second image pattern 22 on the back 10b differs from the first Image pattern 12 on the front of the film-shaped object 10, that in the selection area 30 each black picture element 14 of the first Image pattern 12 is a white image element 26 of the second image pattern 22 and each white picture element 16 of the first picture pattern 12 is a black picture element 24 of the second image pattern 22 corresponds.

The black picture elements 24 are also on the back 10b, for example printed and the white picture elements 26 unprinted.

In the congruent superimposition shown in FIG. 3 and recognizable in transmitted light of the second surface area with the second image pattern 22 the back 10b and the first surface area with the first image pattern 12 on the front 10a of the sheet-like object 10 the black picture elements 16 of the first picture pattern 12 and the black picture elements 24 of the second picture pattern 22 to one completely black area within the selection area 30 so that the letter T is clearly recognizable.

4 through 8 are examples of picture elements 14, 16 and picture element cells 18 reproduced.

The arrangement shown in FIG. 4 corresponds to that shown in FIGS. 1 to 3 Example. The individual picture elements 14, 16 are squares, one each black picture element 14 and an adjacent white picture element 16 one form rectangular picture element cell 18. The angle of rotation here is 180 °.

In the example shown in FIG. 5, there are four square picture elements 14, 16 combined to form a picture element cell 18. The angle of rotation is here 90 °.

In the example shown in FIG. 6, the individual picture elements 14, 16 isosceles triangles, with two neighboring picture elements form a diamond-shaped picture element cell 18. The angle of rotation between the picture element cells of the first and second picture patterns is 180 ° here.

In the example shown in FIG. 7, the individual picture elements 14, 16 equilateral triangles and the picture element cells 18 form a hexagon. The The angle of rotation for the picture element cells 18 is 60 ° here.

8 shows an image pattern 12 with an area-wide arrangement of black and white picture elements 14, 16. Two or four picture elements each 14, 16 form picture element cells 18 with a rotational symmetry with a Angle of rotation of 180 ° or 90 °.

Claims (9)

Foil-shaped object with image parts arranged on both sides and complementing each other in transmitted light by superimposing them to form a predefined image with high protection against forgery,
characterized in that
To increase the security against forgery, a first surface area in the form of a first image pattern (12) on one side (10a) of the object (10) and a second surface area in the form of a second image pattern on the second side (10b) of the object (10) 22) is arranged, the two image patterns (12, 22) being essentially made up of light and dark, randomly arranged image elements (14, 16; 24, 26) of the same number and the same shape, the two Image patterns (12, 22) in a basic area (32) with an identical arrangement of the picture elements (14, 16; 24, 26) and in a selection area (30) with a predefined, non-identical arrangement of the picture elements (14, 16; 24, 26) are divided, and the two image patterns (12, 22) lie congruently one above the other in transmitted light and generate the predefined image in the selection area (30). Sheet-like object according to claim 1, characterized in that two, four or six picture elements (14, 16; 24, 26) form picture element cells (18, 28) which have a rotational symmetry with a rotation angle of 180 °, 90 ° or 60 ° , wherein the light and dark picture elements (14, 16; 24, 26) are arranged in a picture element cell (18, 28) in a rotationally symmetrical manner and alternately in the direction of rotation, the picture element cells (18, 28) being randomized with regard to their angular position. are arranged in the image patterns (12, 22), and the two image patterns (12, 22) in a basic area (32) with an identical arrangement of the picture element cells (18, 28) and in a selection area (30) with a predefined angle position, non-identical arrangement of the picture element cells (18, 28) are divided. Sheet-like object according to claim 1 or 2, characterized in that the light picture elements (16, 26) are white and the dark picture elements (14, 24) are black. Sheet-like object according to one of claims 1 to 3, characterized in that the picture elements (16, 18; 26, 28) are constructed from the same or different colors. Film-like object according to one of claims 1 to 4, characterized in that at least some of the picture elements (14, 16; 24, 26) have a color which is only visible in UV or IR light and only in UV or IR Light is visible. Film-like object according to one of claims 1 to 5, characterized in that the image patterns (12, 22) are printed on the object (10). Foil-like object according to one of Claims 1 to 6, characterized in that the predefined image generated by the image patterns (12, 22) in the selection area (30) is a watermark, a number, a character, a font, a logo or a halftone image. Foil-shaped object according to one of Claims 1 to 7, characterized in that the image patterns (12, 22) for the congruent overlay are applied to the object (10) by means of register printing. Use of a sheet-like object according to one of the claims 1 to 7 in the form of a packaging, a packaging material, a packaging aid, a security, a banknote, an admission ticket or the like Documents with high security against forgery.

Images