DE102012222583A1 - Security system for security papers, documents of value or the like - Google Patents

Security system for security papers, documents of value or the like

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Publication number
DE102012222583A1
DE102012222583A1 DE102012222583.8A DE102012222583A DE102012222583A1 DE 102012222583 A1 DE102012222583 A1 DE 102012222583A1 DE 102012222583 A DE102012222583 A DE 102012222583A DE 102012222583 A1 DE102012222583 A1 DE 102012222583A1
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DE
Germany
Prior art keywords
element
security
structure
image
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE102012222583.8A
Other languages
German (de)
Inventor
Christof Baldus
Alexander Bornschlegl
Peter Schiffmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient GmbH
Original Assignee
Giesecke and Devrient GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Priority to DE102012222583.8A priority Critical patent/DE102012222583A1/en
Publication of DE102012222583A1 publication Critical patent/DE102012222583A1/en
Application status is Withdrawn legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30Identification or security features, e.g. for preventing forgery
    • B42D25/351Translucent or partly translucent parts, e.g. windows
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14Security printing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30Identification or security features, e.g. for preventing forgery
    • B42D25/342Moiré effects
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30Identification or security features, e.g. for preventing forgery
    • B42D25/36Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/369Magnetised or magnetisable materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30Identification or security features, e.g. for preventing forgery
    • B42D25/36Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378Special inks

Abstract

Security system for security papers, documents of value or the like, comprising a security element (2) with a carrier (2), a first printing pattern, which has a first grid structure (5) and is arranged in a first layer (19) on the carrier, a printing element ( 6) containing pigments which can be oriented by an external magnetic field, being arranged in a second layer (19) on the carrier and at least partially covering the printed pattern, a magnetic element (10) having a second grid structure (11) of north and south poles, wherein either the first raster structure (5) or the second raster structure (11) encodes an image (12) and the raster structures (5, 11) of the printed pattern and the magnetic element (10) are designed to match one another so that the image (12) is perceptible in that the magnetic element (10) is arranged under the pressure element (6) to align the pigments of the pressure element (6) in the second screen structure (11).

Description

  • The invention relates to a security system for security papers, which allows to check by means of a test element provided on the security paper security element on its authenticity.
  • The invention further relates to a value document with such a security system.
  • Finally, the invention also relates to a manufacturing method for a security system for securities, value documents or the like, in which a security element provided on the value document can be checked by means of a checking element.
  • From the EP 2384898 A1 a security element is known which comprises a print pattern having a line grid structure encoding an image. An analyzer, which also has a line grid pattern, can be placed over the print pattern so that when viewed in a transparent view within a certain viewing angle range, the image becomes visible. The analyzer is designed so that it covers components of the first print pattern, which disturb the image impression. In the mentioned EP 2384989 A1 this is realized by the first print pattern being a crossed line screen, and the analyzer serves to cover the unidirectional elements of that line screen obscuring the image so that only the other directional elements of the line screen are still visible and deliver the picture.
  • The use of an analyzer to visualize an image is also apparent from the references DE 10 2004 007 379 B3 . WO 2007/115656 A2 . US 6997482 B2 . EP 0967091 A1 . EP 1089883 B1 . EP 1886827 A1 . EP 1845496 A1 and DE 10 2006 061 905 A1 known.
  • From the WO 2009/074284 A2 For example, a security system and a value document with such a security system and a production method for such a security system are known. There, reversibly magnetically orientable pigments, which are arranged in a printed image, are used in combination with a static printed image. When a magnet is put on, the optically perceptible impression changes, for example because the magnetic pigments have the function of a shutter which is opened under the influence of magnetic fields. If the magnet is placed under the security element, a printed image is visible, which is otherwise covered by the magnetic pigments.
  • Magnetically orientable pigments are in connection with security elements also from the WO 2012/130370 A1 . WO 2010/142553 A1 . WO 2010/142391 A1 and WO 2010/139427 A1 known.
  • The invention has for its object to provide a security system that makes the beneficial effect of magnetically alignable pigments advantage.
  • This object is achieved by a security system for security papers, documents of value or the like., Comprising a security element with a carrier, a print pattern having a first grid structure, which is arranged in a first layer on the carrier, a pressure element by an external magnetic field alignable pigments is disposed in a second layer on the support and the print pattern at least partially covered, a magnetic element having a second grid structure of north and south poles, wherein either the first grid structure or the second grid structure encodes an image and the grid structures of printed pattern and magnetic element are designed to match one another so that the image is perceptible within a certain viewing angle range when the magnetic element is arranged under the pressure element in order to align the pigments of the pressure element in the second grid structure.
  • The object is further achieved by a security system for security papers, documents of value or the like, comprising a security element with a carrier, a print pattern having a first grid structure, which is arranged in a first layer on the carrier, a pressure element by an external magnetic field alignable pigments, is arranged in a second layer on the carrier and the print pattern at least partially covered, a magnetic element having a second grid structure of north and south poles, wherein the first grid structure and the second grid structure are designed to match each other so that they are complement to encode an image and the image is perceptible when the magnetic element is disposed under the printing element to align the pigments of the printing element in the second screen structure.
  • The object is likewise achieved by a value document which has said security element and said magnetic element at different areas.
  • The object is also achieved by a manufacturing method for a security system for security papers, documents of value or the like, in which a security element is produced by a carrier is provided in a first layer having a print pattern having a raster structure and in a second layer a print element containing pigments alignable by an external magnetic field and at least partially covering the print pattern, providing a magnetic element having a second raster structure from north and south poles, wherein either the first raster structure or the second raster structure is formed so that it encodes an image and the raster structures of print pattern and magnetic element are made to match each other so that the image within a certain viewing angle range is perceptible, if Magnetic element is disposed under the pressure element and aligns the pigments of the printing element in the second grid structure.
  • Finally, the object is also achieved by a production method for a security system for security papers, documents of value or the like, in which a security element is produced by providing a carrier in a first layer with a first printing pattern, which has a grid structure, and in a second layer A pressure element which contains pigments which can be oriented by an external magnetic field and which at least partially covers the printed pattern, a magnetic element is provided which has a second grid structure of north and south poles, wherein the first grid structure and the second grid structure are made to fit one another, that they complement one another to code an image and the image is perceptible when the magnetic element is placed under the printing element and aligns the pigments of the printing element in the second screen structure.
  • The invention combines the static print pattern in the first layer with the partially overlapping printing element in the second layer. This pressure element is made of magnetically orientable pigments which occupy a certain structure when the magnetic element is placed under the security element. The static, so spatially invariable print pattern and the magnetic element each have a grid structure, which cooperate so that the first image with good contrast can be seen when the two grid structures match each other over each other. The second grid structure of the north and south poles of the magnetic element is transferred as a grid structure in the magnetic pigments of the printing element of the second layer, so that (only) with correspondingly applied magnetic element, the second grid structure in the second layer is present. Only then can the first and second grid structures interact to make the picture perceptible.
  • This interaction of first and second grid structure can be done in several ways. For all, it is essential that the term raster structure designates a pattern that includes a basic structure in which there is some deviation from strict periodicity or regularity for image coding. An example of such a raster structure would be, for example, a wide-coded line raster or a dot raster.
  • A first way in which the raster structures interact is that the pigments of the printing element aligned in the second raster structure cover components of the raster structure of the printing pattern which obscure the encoded image. The aligned magnetic pigments lift the fog and make the image visible in the print pattern. This option is referred to below as variant 1.
  • Another type of interaction is the utilization of a moiré effect. Only when the grid structures of the printing pattern and the magnetic pigments of the printing element (under the action of the magnetic element) overlap so that a moiré effect occurs, the coded image is visible. Hereinafter, this type of interaction is referred to as variant 2.
  • A third type of interaction is that both raster structures together form a raster structure that encodes an image. These raster structures can be obtained, for example, by rasterizing an image and decomposing the resulting overall raster structure into two individual raster structures which no longer encode the image in each case. This is below the variant 3.
  • Pigments which are alignable by an external magnetic field are understood to be pigments intended for printing, the degree of coverage of which, that is to say radiation absorption or reflection, can be temporarily changed by the action of an external magnetic field. The second grid structure of the magnetic element can thus be converted into a corresponding grid structure with regard to the transparency of the printing element. Corresponding examples of such pigments are in WO 2009/074284 A2 whose disclosure content is fully incorporated in this regard.
  • The print pattern comprising the first raster structure is spatially static. The second screen structure, however, is generated in the printing element depending on the position of the magnetic element. Thus, a simple displacement of the magnetic element relative to the security element, the second grid structure, which is impressed in the printing element in a magnetic manner move. Since at least in the variants 1 and 3, but partially also in the variant 2, the first grid structure in a certain position to the second Raster structure must lie to make the image visible, the security system of the invention achieves a very noticeable verification effect, if one moves the magnetic element relative to the security element or twisted. Only with a suitable position in which the first and second screen structures are in the correct register to each other, the picture appears. The term "suitable position" of the magnetic element with respect to the security element is understood in this description to mean the image-forming registration of the first to the second screen structure. Since the magnetic member is not so firmly connected to the security element that a relative position change would be impossible, a user can easily perform the desired shift to check the security system for the effect that the coded image disappears or appears depending on the position of the magnetic element ,
  • The inventive concept achieves the advantage that the image is only visible under the action of a magnetic element ultimately serving as an analyzer. This effect is not reproducible by simple copying. Also, the coded image can not be made visible without the availability of the magnetic element. In addition, one does not regard the magnetic element as mediating the raster structure mediated by it, and thus its significance for the analyzer effect, since only the interaction of the second raster structure of the magnetic element and the first raster structure of the print pattern reproduces the image. What the individual grid structures look like is not recognizable. In particular, it is not possible to emulate the magnetic element if only the security element is available. The security system thus works according to the key / lock principle. Only the one who has the magnetic element can check the authenticity of the security element, and it is difficult, if not impossible, to close the security element to the structure of the magnetic element.
  • However, the invention also makes it possible to work with a magnetic element which is firmly connected to the security element, for example by providing the two elements at different areas of a value document. By a suitable folding process, the magnetic element is then folded under the security element and the magnetic pigments aligned properly to make the image visible. Any otherwise necessary twisting of the magnetic element to achieve the appropriate relative position of security element and magnetic element is then no longer necessary.
  • Such a twist can usually be dispensed with in variant 2, since a moiré pattern always occurs between the first and second grid structures, except in very specific parallel positions. Of course, twisting leads to more or less strong formation of the moiré pattern. However, this only concerns the question of whether the picture is particularly good or rather less recognizable. Recognizable it remains up to exceptional situations always.
  • In variant 1 too, twisting can be dispensed with if the printing pattern has two line patterns which are crossed to one another, one line direction of which codes the printed image and the other line direction obscures the printed image.
  • Another advantage is that a much easier-to-manufacture structure of the security element is achieved, since only two layers are required, the z. B. can be conveniently placed on the front and back of the carrier.
  • In an advantageous development of this construction, the second line grid of the printing pattern can additionally encode a motif. Thus, the second line grid not only serves to obscure the image encoded by the first line raster, but also provides a (further) motif perceptible outside the particular viewing angle range along with the image. The magnetic element thus ensures that either the image is perceptible depending on the position of the magnetic element, or the subject. For the coding of the information in the line grids, in particular for the coding of the image in the first line grid, all known Linienrastermodulierungen in question, especially one-sided modulations, which are particularly easy to control typography and beyond a particularly good shading effect for the analyzer result.
  • Information encoded in the print pattern, i. H. The image in the first line grid and, if present, the motif of the second line grid can have different colors. Thus, both the obfuscation and the recognition of the combination of image and subject outside the particular viewing angle range can be required.
  • The line spacing for line grids can be freely selected within the scope of the invention. A good combination between easy recognizability and minimization of the printing outlay arises at a line spacing of first and second line grid of 0.15 to 0.3 mm, more preferably in the range of 0.2 mm. The line modulation can then be between 0.05 and 0.15 mm.
  • As mentioned above, the second line grid may encode a motif. The terms "image" in connection with the first line grid or "motif" in connection with the second Line grids have been chosen only for differential assignment to the corresponding elements or structures. The different terms should not be linked to different meaning. The same applies to the term "motif picture", which will be introduced later. These terms are merely intended to describe that image, motif and motif image each provide their own visually perceptible information. This may include, for example, graphic information, an image, a pattern, numbers, letters or other characters.
  • For the first and the second line grid, a line width modulation can be used to achieve a gray-tone representation of the image or the subject. Particularly preferred is and a particularly effective shading effect shows a one-sided line width modulation.
  • As an alternative or in addition to a gray-tone representation, it is possible for the first or second line raster to encode the image or motif as a black-and-white representation by providing corresponding recesses in the line raster. In these recesses then no line grid is present, so that the recessed area is then perceived without further structure. By recess, there is both a recess of the lines, i. a bright surface, as well as a recess of the line spaces, so to understand a dark area.
  • With regard to the layer sequence, it is preferred if the printing pattern is applied over the printing element, since then even a small change in transparency of the printing element under magnetic field influence already makes the recognizability of the image possible.
  • It is also possible to apply a transparent interference layer over the print pattern and the printing element, which gives the image (when it is made visible with the aid of the magnetic element) an optically variable effect.
  • Another or additional possibility to implement a low degree of transparency in the printing element in a good visibility of the coded image is to provide under the print pattern and the printing element, a contrast-enhancing planar layer, preferably from a dark color with a light reference value less than 0.5 (in a scale between 0 and 1, where 0 is black and 1 is ideal white).
  • The security element can be designed, in particular, as a security thread, tear-open thread, security strip, security strip, patch or as a label for application to a security paper, value document or the like. In particular, the security element can span transparent areas or recesses.
  • The term security paper is understood here in particular as the precursor that can not be processed to a value document which, in addition to the security element according to the invention, may also have further authenticity features (such as, for example, luminescent substances provided in the volume). Value documents are here understood, on the one hand, documents produced from security papers. On the other hand, value documents can also be other documents and objects which can be provided with the security feature according to the invention, so that the value documents have non-copyable authenticity features, whereby an authenticity check is possible and at the same time unwanted copies are prevented. Chip or security cards, such. Bank or credit cards are other examples of a value document.
  • Translucency or translucent in this description is understood to mean the partial translucency of a body, that is, the property of transmitting light without being transparent. Translucence is thus to be seen in contrast to transparency (= transparency of image or sight). The reciprocal property of translucency is opacity. For the purpose of this description, a body is translucent or transparent if the transmittance in the region of the visible optical radiation (= light) is at least 90%. At transmittances between 10 and 90%, the body is partially transparent or translucent.
  • The production method according to the invention can be developed so that the described preferred embodiments and embodiments of the security element are produced.
  • It is understood that the features mentioned above and those yet to be explained below can be used not only in the specified combinations but also in other combinations or alone, without departing from the scope of the present invention.
  • The invention will be explained in more detail by way of example with reference to the accompanying drawings, which also disclose features essential to the invention. Show it:
  • 1 a sectional view through a security system, comprising a security element and a magnetic element,
  • 2 a perspective schematic view of the security element of 1 from above,
  • 3 a representation similar to the 2 but of a modified embodiment of the safety system,
  • 4 a schematic representation of the structure of the security system of 2 .
  • 5a to c partial sections from the line grids of the security system of the 4 .
  • 6 a representation similar to the 4 for a modified version of the security system and
  • 7 to 11 Sectional views by a wearer of the security system 1 . 4 or 6 in the form of a three-layer composite material.
  • The figures are not shown to scale for clarity, especially in terms of thicknesses. Incidentally, elements which in different embodiments functionally and / or structurally resemble or correspond bear the same reference numbers in all figures in order to avoid description repetitions. In the following description is the front of the security element in the representations of 1 labeled top or front page. The back is accordingly the bottom or back side. This convention is merely for ease of description and is not intended to be limiting as to the construction and / or application of the security element.
  • 1 shows simplified a section through a security system 1 , The security system 1 includes a security element 2 and a magnetic element 10 , In the sectional view of the two elements in 1 is shown, the magnetic element is located 10 under the security element 2 , This configuration represents a read-out process that involves a check of the security element 2 allowed. This will be explained later. Basis for the security element 2 is a carrier, which can be realized for example by a plastic film. This plastic film is preferably transparent or even translucent, as will be explained later. The security system 1 may be provided for example for a banknote or a security card, such as a credit card. In particular, it may be arranged partially over a window provided in the corresponding value document.
  • At the top 3 of the wearer is a first layer 19 formed by a print that represents a static print pattern. The bottom 4 has a second layer 20 with a print. The imprint on the top 3 is formed in the form of a line grid structure, ie in the first layer 19 on the top 3 there is a line grid structure 5 , Due to the thickness d of the carrier 2 the layers are arranged at a corresponding distance from each other.
  • In the shift 20 there is an effect pigment layer 6 whose pigments are magnetically alignable. Preferably, these effect pigments are encapsulated in a microcapsule and are substantially freely rotatable therein. Without an external magnetic field, the effect pigments are the effect pigment layer 6 Preferably, each isotropically aligned within their microcapsule, so in the totality no preferred direction. In practice, of course, certain deviations from an ideal isotropic distribution may occur, depending, for example, on the geometric shape, the magnetizability, the viscosity of an encapsulating liquid or a structure of the encapsulation. Under the influence of an external magnetic field, the effect pigments align quickly. After elimination of the external magnetic field, they return to their original state. Without restoring force or without other external forces, the return may sometimes take a very long time and take a few minutes, hours or even days. Also, a movement of the security element 2 cause in the geomagnetic field, the provision and a largely isotropic distribution of the orientations of the effect pigments. Until this isotropic distribution is achieved, one remains in the effect pigment layer 6 However, after the removal of the external magnet initially generated magnetization pattern visible. In order to accelerate the return to the initial state, the microcapsules may, in convenient configurations, contain a gel which provides a restoring force to the magnetically-alignable effect pigments. In this regard, turn on the WO 2009/074284 A2 which explains possible effect pigments in detail here.
  • The effect pigments in the effect pigment layer 6 be through the magnetic element 10 into a structure that has transparent or light spots and dark spots in the effect pigment layer 6 causes. The corresponding magnetic element 10 becomes, as in the sectional view of the 1 represented under the security element 2 placed. It has a grid structure 11 from northern Poland N and south Poland S, resulting in a corresponding transparency or brightness structure of the effect pigment layer 6 implements. In the in 1 embodiment shown, the structure of the magnetic north and south poles of the magnetic element 10 also a line grid 11 , However, this is purely exemplary, as already explained in the general part of the description.
  • The figure further shows that the line grid structure 5 and those in the effect pigment layer 6 generated line grid structure are in a certain orientation to each other, which by the position of the magnetic element 10 is predetermined. The alignment here is such that the line grid pattern at the bottom 4 at least part of the line grid structure 5 shaded when the security element is within a certain viewing angle range, in 1 is schematically illustrated with the angle α, viewed in phantom.
  • The line grid structure at the bottom 4 is preferably a non-modulated line grid and serves, as will be explained, as an analyzer in the review of the security element 1 ,
  • The line grid structure 5 at the top is in one embodiment as a crossed pattern of a first line grid 7 and a second line grid 8th educated. This is in 2 good to recognize the a perspective view of the security element 2 from the top 3 of the wearer. In 1 It is good to see that the first line grid 7 is modulated. This type of line modulation, which is known to the person skilled in the art, causes the first line grid 7 encoded a picture. Without the line grid 8th this image would be from the top 3 clearly visible. The crossed to the first line grid 7 lying second line grid 8th However, obscures the perception of the first line grid 7 coded image, in particular because the line grid structures are so large that they are difficult or impossible to perceive with the naked eye at normal viewing distance.
  • The construction of the line grid structure 5 at the top 3 of the security element 2 , that requires the first line grid 7 encoded image is only noticeable under certain conditions with good contrast. These conditions are governed by the line grid structure 6 in the effect pigment layer 6 on the bottom 4 of the security element 2 So ultimately through the line grid structure 11 of the magnetic element 10 Are defined. The grid structure 11 has a line grid, the correct orientation of the magnetic element 10 on the bottom 4 essentially parallel to the line grid 8th lies. Depending on the angle or position of the magnetic element 10 thus shadows the line grid in the effect pigment layer 6 on the bottom 4 of the security element 2 the second line grid 8th different strengths. This has the consequence that through the interaction of second line grid 8th and line grid in the effect pigment layer 6 Slots for viewing the first line grid 7 and thus the image coded thereby remain whose slot width of viewing angle / position of the magnetic element 10 depends. Thus, the contrast in the perception of the image, which is the first line grid 7 is coded by the viewing angle and the position of the magnetic element 10 affected.
  • This results in an impressive change effect, through which the first line grid 7 coded image when tilting the carrier or a displacement of the magnetic element 10 shows up or disappears again.
  • In an in 3 illustrated embodiment of the invention codes the line grid 8th an additional motif. As a result, the combination of the image, that of the first line grid, is dependent on viewing angle or shift position 7 is coded, and the subject, the second line grid 8th coded, visible or not. For a complete shading of the second line grid 8th through the line grid of the effect pigment layer 6 on the bottom 4 on the other hand, only the picture appears, which is indicated by the first line grid 7 is coded. This results in the result of the position or view angle dependent supplement of the image by the subject.
  • The support in this embodiment is required to have a certain degree of transparency or translucency. If one uses a transparent carrier, the image or the image supplemented by the motif appears in a transparent view particularly clearly. However, for certain cases, a translucent carrier may suffice. Also, the layers can 19 . 20 be arranged on the same side of a carrier, which may then be absorbent.
  • In the embodiments of the 2 and 3 is exemplarily a translucent carrier used that over a window 9 is arranged, which is formed for example in a banknote or a security card.
  • 4 shows in a perspective view of the security system of 3 , The reproduced at the right edge of the drawing sheet 5a to 5c show excerpts of the corresponding line grid, which in 4 are shown. Elements of the representation of 4 already using the 3 correspond to described elements are provided with the same reference numerals.
  • On the front side 3 of the security element is in the first layer 19 the first line grid structure 5 arranged. It includes the first and the second line grid 7 . 8th , The first and second line grid 7 and 8th cause a gray-tone rendition of image information in the form of the image by one-sided line width modulation 12 or the subject 13 , The line grid 7 . 8th are shown separately only for the sake of clarity. In fact they are in the first one Line grid structure 5 united as a crossed line grid in the first layer 19 intended. The first line grid 7 lies in relation to the horizontal of the 5 at a 45 ° angle (for example with a line spacing of 0.1 mm and a modulated line width of 0.05 to 0.1 mm) and encoded as a one-sided line grid as image 12 a closed eye. The thickenings of the line grid are aligned to the right as an example. However, the orientation has no further meaning. Next is in the crossed first line grid pattern 5 the second line grid 8th present, which is arranged at -45 ° to the horizontal as an example. Line spacing and line weight are the same as the first line grid 7 , It shows as a motive 13 in grayscale an open eye.
  • 5c shows the effect pigment layer 6 with the line structure 11 They pass through the magnetic element 10 received. It adjusts (only) when the magnetic element 10 the grid structure 11 its magnetic north and south poles on the effect pigment layer 6 has transferred. The then in the effect pigment layer 6 formed line grid structure of the second layer 20 on the back side 4 the carrier runs with correct orientation of the magnetic element 10 at a -45 ° angle (line spacing, for example 0.1 mm, line width 0.1 mm). It does not encode information.
  • By applying the crossed first line grid structure 5 in the first layer on the front, comprising the first line grid 7 and the second line grid 8th it comes through the magnetically structured effect pigment layer 6 to a shading. In changing perspective of the viewer in review, for example, by tilting the security element 1 horizontally and / or vertically, the aforementioned line grid structures overlap. This applies to the correct orientation of the magnetic element 10 ie with the correct position in the effect pigment layer 6 generated second line grid structure, which through the line grid structure 11 of the magnetic element 10 is predetermined.
  • Alternatively, the superimposition of the line grid structures, leading to a recognizability of the image 12 or the subject 13 leads, achieved by the fact that the magnetic element 10 under the security element 2 is moved. In both cases, one achieves that the information visible in supervision of the image 12 (closed eye) disappears and the view of the second information of the subject disappears 13 (opened eye) is released. By the change of perspective or the position change of the magnetic element 10 the line grid structure shifts in the effect pigment layer 6 optically in the direction of the line direction of the first line grid 7 and covers the second line grid 8th from.
  • The security system 1 Thus, it allows a picture-changing effect, which can consist both in a change between recognizability and non-recognizability of an image and in the alternation between two image contents, not only by generating a viewing angle change, but alternatively or additionally by moving the magnetic element 10 , The verification in the security system 1 is thus possible that a user, the magnetic element 10 under the security element 2 puts and twists the two against each other and / or shifts until he recognizes the image change. This authenticates this with the security element 2 provided value document.
  • 6 shows an alternative embodiment for exploiting the effect. On the front side 3 of the security element 2 is again in a first shift 19 a line grid structure 5 applied, consisting of a first line grid 7 and a second, crossed to line grid 8th consists. The first line grid 7 again lies at 45 °. Unlike in the embodiment of 4 However, it does not encode a gray-tone image, but has constant line spacing and constant line width. The information of the picture 12 is caused by a recess in the line grid; it represents the value number "0". Of course, the recess can also be made inversely by the gaps in the line grid are omitted. This is an example in the right part of the first line grid 7 played. Here is the value "5" to see.
  • The second line grid 8th shows in the area of the picture 12 no modulation. It is used exclusively for disguising the first line grid 7 introduced information. In top view on the front 3 one recognizes the value number "0" with a 45 ° grid assignment in a darker Kreuzrasterumfeld.
  • Back on the security element 2 the effect pigment layer acts 6 with the magnetically impressed second line grid structure 11 as an analyzer in the form of a decoding grid. He also has no gray tone modulation but in the form of a recess a picture motif 14 , here the picture of a blossom.
  • Through to the front of the security element 2 applied crossed first line grid structure consisting of first line grid 7 and second line grid 8th it comes in combination with the second line grid structure 11 , which acts as an analyzer, on the back of the wearer by the body depth or thickness of the wearer to a shading effect. In changing perspective of the viewer in review or analog movement of the magnetic element 10 overlap the mentioned line grid. It interacts on the back in the effect pigment layer 6 generated second grid structure as an analyzer with the front, tilted by 90 ° to grid. The information of the image recognizable in supervision 12 disappears approximately and the view of the second information, in this case the image motif 14 will be released. The back line grid structure in the effect pigment layer 6 shifts with increasing tilting of the security element 2 / moving the magnetic element 10 in the transparency area of the image 12 and reduces its transparency. There is a partial darkening or darkening of the picture 12 , The one acting as the analyzer in the effect pigment layer 6 The generated, back-line grid structure encoded information of the flower is visually highlighted and gains in visible dominance over the front-side information.
  • The production of grid structures in the print pattern on the front 3 is possible in a printing process. Alternatively, you can also first print a two-dimensional structure and then this at the points of the image 12 or the motif image 14 remove again. The term "print motif" must therefore not be understood as limiting to simple printing processes, but also covers complex, multistage production processes. The line grid structure 11 in the magnetic element 10 is due to the manufacturing process of the magnetic element 10 specified.
  • The described shading effects can also be achieved by using the line grid structure serving as the analyzer 11 realized as a cross line grid. Even then, the shifts in the effect pigment layer 6 magnetically generated cross-line grid during movement of the magnetic element 10 optically in the direction of the line modulation of the first line grid 7 or the second line grid 8th and reduce their transparency, so that a partial darkening arises. This dark zone can optionally be used for the introduction of further information.
  • For the described security system 1 are two layers relevant, which are preferably spatially spaced. It is the first layer 19 , in which, for example, the first line grid structure 5 comprising the line grid 7 and 8th , are arranged, as well as the second layer 20 with the effect pigment layer 6 in which under the action of the magnetic element 10 the second line grid structure 11 is produced. The spacing of these structures can be achieved in a particularly simple manner when the carrier used is a multilayer composite which is constructed from a sequence of paper and plastic film layers and has an inner paper or plastic film layer. In the 7 to 10 For such a carrier, various attachment possibilities of the first layer provided with the print pattern are possible 19 and the one with the effect pigment layer 6 provided second layer 20 shown.
  • The carrier has, for example, two outer plastic film layers 15 and 17 as well as an internal paper layer 16 , This one has a hole 18 , In the area of this hole are the first layer 19 and the second layer 20 attached so that the advantageous transparency of the carrier between the layers 19 and 20 given is. The hole 18 can optionally be filled with adhesive. In 7 are the layers 19 and 20 on the outsides of the outer plastic films 15 and 17 , In 8th are the layers 19 and 20 mounted on either side of one of the outer layers, in this case the plastic film 17 , In 9 are both layers 19 and 20 on the insides of the outer layers 15 and 17 intended. In 10 finally there is a layer (in this case the layer 20 ) on the inside of an outer layer, the other layer (in this case, the layer 19 ) on the outside of the other outer layer. Of course, in the 7 to 10 the positions of the first layer 19 and the second layer 20 be exchanged as desired.
  • 10a shows an example of a sectional view through a security element 2 , at the first layer 19 and second layer 20 on one and the same side of a paper carrier 16 are formed. This is the effect pigment layer 6 which in the second layer 20 is arranged under the first layer 19 which is the static print pattern 5 contains. The static print pattern is not formed as a line grid, but was obtained in which the image to be displayed was rasterized and the resulting overall raster image was divided into two parts. One part is the static print pattern 5 , the other part in the magnetic element (not shown) 2 realized. Of course, this cooperation is according to version 3 the above variants not on the construction of the 10a limited.
  • 11a shows a further modification in which under the effect pigment layer 6 another pad 21 is present, which increases the contrast, when impressing the grid structure 11 into the effect pigment layer 6 is available. The underlay 21 preferably consists of a dark paint, more preferably with a lightness value of 0.5 and less, more preferably of less than 0.2.
  • 11b shows a comparison with the construction of the 10a inverted layer sequence of the first layer 19 and second layer 20 , On the paper substrate 16 first became the static print pattern 5 applied. The gaps in this print pattern were through a transparent filler 22 and then the effect pigment layer was 6 attached above it.
  • For the production of the described security system suitable printing methods are suitable, in particular offset printing method, gravure printing method, ink jet printing method, laser printing method, etc.
  • Of course, the printing of the line grid can also be performed in color, in particular, can for the line grid structure 5 and / or can for the first line grid 7 and the second line grid 8th different colors are used.
  • Of course, the security system according to the invention can also be combined with other security features in order to achieve a higher protection against copying or copying.
  • In a further embodiment according to variant 2 put the static print pattern in the first layer 19 on the front side 3 and the magnetic element 10 Each raster structures available, which together form a moiré overlay. In this way, a simple twisting of the magnetic element 10 opposite the security element 2 for image generation.
  • The following options are possible with regard to the construction of the security element.
  • In a first option, a cotton-vellum substrate is screen printed, screenprinted, flexo-printed, gravure printed or stitch printed with microencapsulated, reversibly magnetically orientable magnetic pigments. The magnetic pigments, e.g. gold, are dispersed in a binder, e.g. a UV-curable, free-radical, aqueous or solvent-based binder.
  • After curing of the binder is in a further printing step, the magnetically influenced effect pigment layer 6 Screen printed, flexo, gravure, offset or offset printing with a visually and / or IR-visible ink. This is the static pressure pattern, such as the line grid 5 educated. This structure can not be influenced magnetically.
  • In principle, preference is given to hue and color strength of the effect pigment layer 6 and the print pattern comparable or similar, as this enhances the perceived effect. Likewise, a comparable gloss is preferably present in both layers, since then the individual information of the two layers are equivalent.
  • In a modified construction, the print pattern is applied directly to the effect pigment layer by means of an application method (eg by means of a cold or heat-sealing method) 6 applied.
  • In a further embodiment, a laminate strip, a patch or a lacquer layer with a structure arranged thereon, for example the line grid structure 5 , on the effect pigment layer 6 applied or laminated. The static print pattern 5 in the first shift 19 can also be prepared on the basis of metallic structures (eg aluminum, chromium, copper etc. with and without additional diffractive substructure and with and without optically variable coating or colored metallic structure) or of non-metallic structures.
  • In a further embodiment, the effect pigment layer 6 applied by means of a film element, a lacquer layer or a transfer element to the carrier and then the static print pattern is printed.
  • In another embodiment, both the effect pigment layer 6 as well as the static print pattern generated on a transfer element and this then on the support of the security element 2 applied.
  • In a further embodiment, the static print pattern and / or the effect pigment layer at least partially contains additional features with regard to luminescence, magnetic properties (for the static print layer) and / or IR properties. It is also possible that one of the two layers deliberately differs in gloss from the other layer or has optically variable properties.
  • In an embodiment already mentioned in the general part, the magnetic element is attached to another area of a value document, such as the security element. By folding or folding then the verification can be done.
  • The effect pigment layer 6 can basically be in a layer structure above or below the static print pattern. With regard to the recognizability, it is preferable to arrange the static printing pattern over the effect pigment layer in the viewing direction.
  • In another embodiment, the topmost layer (e.g., the static print layer) in top view is additionally printed with a preferably transparent interference layer so that the interaction of the static printed layer and effect pigment layer screen structures has an optically variable effect.
  • To increase the contrast in plan view, it is possible under the layer structure, a contrast to provide increasing surface applied coating. This can be, for example, a dark color with a lightness value below 0.5, for example in black, dark blue, dark green, dark brown etc. (cf. 11a ).
  • For applying the effect pigment layer 6 Among other things, the rotary screen printing is suitable. In this case, radically UV-crosslinking inks without volatile constituents can be used. Also radically or cationically UV-curing inks are possible. Also used may be water-dispersion paints or systems of solvent / UV inks or water / UV inks. Another possible printing method is the flat screen printing. The colors mentioned in connection with rotary screen printing can also be used here. The same applies to flexographic printing.
  • The static print pattern in the first layer 19 can also be applied by flexo printing or screen printing. In addition, offset printing, indirect high-pressure, high-pressure or inkjet printing technology is possible.
  • As far as mentioned above, that the distance between the first layer 19 and second layer 20 is exploited for a shading effect, this feature is not essential for the realization of the invention. The shading effect can be as good regardless of the distance between the first layer 19 and second layer 20 be achieved by the magnetic element 10 under the effect pigment layer 6 is moved. This allows the shift position between the grid structure 11 , which in a magnetic manner in the effect pigment layer 6 is generated, and the grid structure 5 of the static printing pattern - regardless of the thickness of the support of the security element 2 ,
  • LIST OF REFERENCE NUMBERS
  • 1
    security system
    2
    security element
    3
    top
    4
    bottom
    5
    Line grid structure
    6
    Effect pigment layer
    7
    first line grid
    8th
    second line grid
    9
    window
    10
    magnetic element
    11
    line screen
    N
    North Pole
    S
    South Pole
    12
    image
    13
    motive
    14
    motif
    15, 17
    foil
    16
    paper layer
    18
    hole
    19
    first shift
    20
    second layer
    21
    document
    22
    ink pen
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • EP 2384898 A1 [0004]
    • EP 2384989 A1 [0004]
    • DE 102004007379 B3 [0005]
    • WO 2007/115656 A2 [0005]
    • US 6997482 B2 [0005]
    • EP 0967091 A1 [0005]
    • EP 1089883 B1 [0005]
    • EP 1886827 A1 [0005]
    • EP 1845496 A1 [0005]
    • DE 102006061905 A1 [0005]
    • WO 2009/074284 A2 [0006, 0019, 0051]
    • WO 2012/130370 A1 [0007]
    • WO 2010/142553 A1 [0007]
    • WO 2010/142391 A1 [0007]
    • WO 2010/139427 A1 [0007]

Claims (17)

  1. Security system for security papers, documents of value or the like, comprising - a security element ( 2 ) with a support ( 2 ), - a first printing pattern comprising a first screen structure ( 5 ) and in a first layer ( 19 ) is arranged on the carrier, - a pressure element ( 6 ) containing pigments which can be oriented by an external magnetic field, in a second layer ( 19 ) is arranged on the carrier and the printing pattern at least partially covered, - a magnetic element ( 10 ), which has a second grid structure ( 11 ) from north and south poles, where either the first raster structure ( 5 ) or the second grid structure ( 11 ) a picture ( 12 ) and - the raster structures ( 5 . 11 ) of print pattern and magnetic element ( 10 ) are designed to match each other so that the image ( 12 ) is perceptible when the magnetic element ( 10 ) fitting under the pressure element ( 6 ) is arranged to the pigments of the printing element ( 6 ) into the second raster structure ( 11 ).
  2. Security system for security papers, documents of value or the like, comprising - a security element ( 2 ) with a support, a printing pattern comprising a first screen structure ( 5 ) and in a first layer ( 19 ) is arranged on the carrier, - a pressure element ( 6 ) containing pigments which can be oriented by an external magnetic field, in a second layer ( 19 ) is arranged on the carrier and the printing pattern at least partially covered, - a magnetic element ( 10 ), which has a second grid structure ( 11 ) from north and south poles, - wherein the first grid structure ( 5 ) and the second raster structure ( 11 ) are designed to match each other so that they complement each other to form an image ( 12 ) and - the image ( 12 ) is perceptible when the magnetic element ( 10 ) under the pressure element ( 6 ) is arranged to the pigments of the printing element ( 6 ) into the second raster structure ( 11 ).
  3. A security system according to claim 1 or 2, wherein the first raster structure is a line raster structure ( 5 ) and the second raster structure ( 11 ) is also a line grid pattern, the print pattern and the aligned pigments of the print element ( 6 ) cause a moiré effect, the image ( 12 ) makes perceptible.
  4. Security system according to Claim 3, in which the first raster structure ( 5 ) of the print pattern, a first and a second line grid ( 7 . 8th ), both in the first layer ( 19 ) and are crossed against each other, wherein the first line grid ( 7 ) the picture ( 12 ) and the second line grid ( 8th ) the picture ( 12 ), and - the second raster structure ( 11 ) of the magnetic element ( 10 ) is formed as a line grid, which fits under the pressure element ( 6 ) arranged magnetic element ( 10 ) substantially parallel to the second line grid ( 8th ) so that the oriented pigments of the printing element ( 6 ) the second line grid ( 8th ) at least partially shade and thereby the image ( 12 ) is perceivable with better contrast than in plan view of the print pattern without an inlaid magnetic element ( 10 ).
  5. Safety system according to Claim 4, in which the first and / or second line grid ( 7 . 8th ) of the print pattern the image ( 12 ) or motif ( 13 ) as a gray-tone representation by line-width modulation, preferably by one-sided line width modulation.
  6. Security system according to one of the above claims, wherein in the security element ( 2 ) the print pattern over the print element ( 6 ) is applied.
  7. Security system according to one of the above claims, wherein in the security element ( 2 ) over the print pattern and the print element ( 6 ) a transparent interference layer is applied so that the image ( 12 ) shows an optically variable effect.
  8. Security system according to one of the above claims, wherein in the security element ( 2 ) under the print pattern and the print element ( 6 ) is a contrast-increasing, planar layer, preferably of a dark color with a light reference value below 0.5.
  9. Security document with a security system according to one of the above claims, wherein the security element ( 2 ) at a first area of the value document and the magnetic element ( 10 ) is formed on a second area of the value document.
  10. Method of manufacturing a security system for security papers, documents of value or the like, in which - a security element ( 2 ) is prepared by a carrier in a first layer ( 19 ) with a print pattern that has a raster structure ( 5 ), and in a second layer ( 21 ) a printing element ( 6 ), which contains pigments which can be oriented by an external magnetic field and which at least partially covers the printed pattern, - a magnetic element ( 10 ), which has a second raster structure ( 11 ) from northern and southern Poland, Where either the first raster structure ( 5 ) or the second grid structure ( 11 ) is designed to be a picture ( 12 ) and - the raster structures ( 5 . 11 ) of print pattern and magnetic element ( 10 ) are designed to match each other so that the image ( 12 ) is perceptible when the magnetic element is arranged under the pressure element and the pigments of the pressure element ( 6 ) into the second raster structure ( 11 ).
  11. Method of manufacturing a security system for security papers, documents of value or the like, in which - a security element ( 2 ) is prepared by a carrier in a first layer ( 19 ) with a print pattern that has a raster structure ( 5 ), and in a second layer ( 21 ) a printing element ( 6 ), which contains pigments which can be oriented by an external magnetic field and which at least partially covers the printed pattern, - a magnetic element ( 10 ), which has a second raster structure ( 11 ) from north and south poles, - wherein the first grid structure ( 5 ) and the second raster structure ( 11 ) are designed to match each other so that they complement each other to form an image ( 12 ) and - the image ( 12 ) is perceptible when the magnetic element ( 10 ) fitting under the pressure element ( 6 ) and the pigments of the printing element in the second grid structure ( 11 ).
  12. A manufacturing method according to claim 10 or 11, wherein the first raster structure is a line grid structure ( 5 ) is formed and the second grid structure ( 11 ) is also formed as a line grid structure, wherein the print pattern and the aligned pigments cause a moiré effect, the image ( 12 ) makes perceptible.
  13. Manufacturing method according to Claim 12, in which the first raster structure ( 5 ) of the print pattern, a first and a second line grid ( 7 . 8th ), both in the first layer ( 19 ) and are crossed against each other, wherein the first line grid ( 7 ) the picture ( 12 ) and the second line grid ( 8th ) the picture ( 12 ), and - the second raster structure ( 11 ) of the magnetic element ( 10 ) is formed as a line grid, which fits under the pressure element ( 6 ) arranged magnetic element ( 10 ) substantially parallel to the second line grid ( 8th ) so that the oriented pigments of the printing element ( 6 ) the second line grid ( 8th ) at least partially shade and thereby the image ( 12 ) is perceivable with better contrast than in plan view of the printing element ( 6 ) without underlying magnetic element.
  14. Manufacturing method according to Claim 13, in which the first and / or second line grid ( 7 . 8th ) of the print pattern the image ( 12 ) or motif ( 13 ) as a gray-tone representation by line-width modulation, preferably by one-sided line width modulation.
  15. Manufacturing method according to one of Claims 10 to 14, in which in the security element ( 2 ) the print pattern over the print element ( 6 ) is applied.
  16. Manufacturing method according to one of Claims 10 to 15, in which in the security element ( 2 ) over the print pattern and the print element ( 6 ) a transparent interference layer is applied, so that the image shows an optically variable effect.
  17. Manufacturing method according to one of Claims 10 to 16, in which in the security element ( 2 ) is formed a contrast-increasing, sheet-like layer, which under the print pattern and the pressure element ( 6 ) and is preferably from a dark color with a lightness value below 0.5.
DE102012222583.8A 2012-12-07 2012-12-07 Security system for security papers, documents of value or the like Withdrawn DE102012222583A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102012222583.8A DE102012222583A1 (en) 2012-12-07 2012-12-07 Security system for security papers, documents of value or the like

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012222583.8A DE102012222583A1 (en) 2012-12-07 2012-12-07 Security system for security papers, documents of value or the like
EP13005419.0A EP2740607B1 (en) 2012-12-07 2013-11-18 Safety element for security papers, valuable documents or the like

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Publication number Priority date Publication date Assignee Title
FR3046110A1 (en) * 2015-12-29 2017-06-30 Arjowiggins Security Secure article comprising a combined image and / or a frame of revelation
FR3046111A1 (en) * 2015-12-29 2017-06-30 Arjowiggins Security Secure article comprising a revelation frame and a combined image

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EP0967091A1 (en) 1998-06-26 1999-12-29 Alusuisse Technology & Management AG Object with optical effect
EP1089883B1 (en) 1998-06-26 2002-11-27 Alcan Technology & Management AG Object with an optical effect
US6997482B2 (en) 2001-09-07 2006-02-14 Kba-Giori S.A. Control element for printed matters
DE102004007379B3 (en) 2004-02-16 2005-09-01 Ovd Kinegram Ag Valuable object with moiré pattern
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