EP3511175B1 - Security element comprising an optically variable structure made from statistically arranged embossing elements - Google Patents

Security element comprising an optically variable structure made from statistically arranged embossing elements Download PDF

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Publication number
EP3511175B1
EP3511175B1 EP19000023.2A EP19000023A EP3511175B1 EP 3511175 B1 EP3511175 B1 EP 3511175B1 EP 19000023 A EP19000023 A EP 19000023A EP 3511175 B1 EP3511175 B1 EP 3511175B1
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EP
European Patent Office
Prior art keywords
embossing tool
embossing
embossed
elements
security element
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.)
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EP19000023.2A
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German (de)
French (fr)
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EP3511175A1 (en
Inventor
Karlheinz Mayer
Thanh-Hao Huynh
Peter Franz
Christoph Mengel
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 Currency Technology GmbH
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Giesecke and Devrient Currency Technology GmbH
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Publication of EP3511175A1 publication Critical patent/EP3511175A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; 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
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; 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
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/324—Reliefs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; 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
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/425—Marking by deformation, e.g. embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/02—Dies; Accessories
    • B44B5/026—Dies

Definitions

  • the invention relates to a security element with an optically variable structure which has an embossed structure and a coating, the embossed structure and the coating being combined in such a way that at least parts of the coating are completely visible when viewed perpendicularly, but are covered when viewed obliquely, so that when viewed at an angle Changing the viewing direction different information becomes visible.
  • the invention also relates to an embossing tool for producing such a security element.
  • a security element with an optically variable structure which has a plurality of embossed elements, each of the embossed elements consisting of at least two flanks which converge at a specific angle and / or a specific direction.
  • the surface of the embossing elements is reflective.
  • the security element consists of at least two groups of embossed elements, the at least two groups only differing from one another in the angle and / or the direction at which the flanks of the embossed elements converge.
  • Each embossing element of the WO 2013/045054 has a regular hexagonal base.
  • a security element for displaying at least one optically variable item of information has a carrier substrate with opposing first and second main surfaces on, a reflective layer arranged on the first main surface and a grid of optically effective elements which are present in or above the reflective layer and which are formed by embossed elements of identical basic shape.
  • embossed elements With an identical basic shape, the embossed elements have, for example, a random size distribution within a certain size interval.
  • the invention is based on the object of developing a generic security element in such a way that protection against counterfeiting is further increased.
  • the security element according to the invention is defined in claim.
  • a statistical arrangement within the meaning of this invention is an arrangement in which the embossing elements are distributed stochastically or randomly to one another. Furthermore, a pseudo-statistical distribution is also possible in which the embossing elements are statistically distributed in a certain area, this area being repeated regularly. In this case, the embossed structure consists of a regular arrangement of identical areas, the embossed elements being statistically distributed within one area.
  • the depth of the respective elevation or depression in the embossing tool is known to be slightly greater than that of the corresponding embossing elements in the substrate of the security element that were produced with this embossing tool.
  • This difference between the depth / height of the structures in the embossing tool and the height / depth of the embossing structures in the substrate is caused by the fact that the substrate cannot be pressed completely into the depressions or on the elevations of the embossing tool during the embossing process, or after the Relax the embossing process to a small extent, depending on the substrate properties.
  • the embossing elements or elevations or depressions of the embossing tool are arranged statistically with respect to one another with regard to their arrangement and / or distribution and / or size and / or outline shape and / or alignment.
  • the embossing elements or elevations or depressions of the embossing tool have the same outline shape, size and orientation and are arranged statistically in relation to the respective distance from one another.
  • the embossing elements or elevations or depressions of the embossing tool can also have the same outline shape and size and be arranged statistically with respect to the respective alignment to one another.
  • a plateau is arranged between two adjacent embossing elements or elevations or depressions of the embossing tool, the slope of which corresponds approximately to the mean value of the inclines of the two adjacent embossing elements or elevations or depressions of the embossing tool.
  • the width of this plateau and thus the distance between the outer edges of the two adjacent embossing elements or elevations or depressions of the embossing tool should not exceed half of the mean of the lateral Extent of the two adjacent embossing elements or elevations or depressions of the embossing tool.
  • a plateau should therefore only be about half as wide as the width of one of the embossing elements or elevations or depressions of the embossing tool that delimit it.
  • the indentations or elevations of the embossing tool merge softly at their edge into the surrounding surface of the embossing tool in order to avoid any substrate damage during an embossing process.
  • the steepness of the flanks also influences the tear behavior of the substrate.
  • a particular advantage of the invention is that individual patterns or series of patterns can be created, an individual statistical arrangement of the embossing elements or elevations or depressions of the embossing tool being used for each application.
  • Different patterns or different series of patterns have different statistical arrangements of the embossing elements or elevations or depressions of the embossing tool, in particular within a series of patterns all of the patterns having the same statistical distribution.
  • Such patterns are, for example, sample banknotes or sample packaging. The patterns can be used for specific customers or orders, so that counterfeits and plagiarism can be recognized.
  • the statistical variation is so small that it is optically not noticeable or only insignificantly, but is recognized by means of a computer algorithm.
  • the statistical variation is so small that it cannot be seen as such with the naked eye.
  • the distance between the individual embossing elements is 0 ⁇ m to 1000 ⁇ m, preferably 0 ⁇ m to 300 ⁇ m, particularly preferably 0 ⁇ m to 150 ⁇ m.
  • the embossing elements or the elevations or depressions of the embossing tool preferably have a depth of 30 ⁇ m to 1000 ⁇ m, particularly preferably 30 ⁇ m to 150 ⁇ m and very particularly preferably 50 ⁇ m to 120 ⁇ m.
  • the outer contour of the embossing elements or elevations or depressions of the embossing tool is triangular, square, pentagonal, hexagonal or honeycomb or polygonal or polygonal.
  • the elevations or depressions of the embossing tool are preferably generated with a laser in order to be able to generate a higher aspect or depth or height-to-width ratio, a greater variety of geometries and steeper flanks.
  • the coating of the security element is a metallic or metallic-looking surface that is applied to the substrate, for example by screen printing, offset printing, indirect letterpress, letterpress, digital printing or gravure printing, a silver-colored patch or a cold or hot foil or a laminated material that is applied to the substrate.
  • the material of the substrate itself can already be designed to be metallically specular or reflective.
  • An optically variable element in the context of this invention is an element whose visual appearance changes when the element is tilted or rotated. For example, when the optically variable element is tilted or rotated, its color changes, a bar appears to move from one side of the element to another side, different characters are displayed when tilted or rotated, or a so-called pumping effect results in the form of an enlarging or decreasing effect Outline of an image motif.
  • the substrate particularly preferably consists of paper made of cotton fibers, as is used for example for banknotes, or of other natural fibers or of synthetic fibers or a mixture of natural and synthetic fibers, or of at least one plastic film.
  • the substrate preferably consists of a combination of at least two different substrates arranged one above the other and connected to one another, a so-called hybrid.
  • the substrate consists for example of a combination of plastic film-paper-plastic film, i.e. a substrate made of paper is covered on either of its two sides by a plastic film, or of a combination paper-plastic film-paper, i.e. a substrate made of a plastic film is covered on each of its two sides by paper.
  • the font DE 102 43 653 A9 states in particular that the paper layer usually has a weight of 50 g / m 2 to 100 g / m 2 , preferably 80 g / m 2 to 90 g / m 2 .
  • any other suitable weight can be used depending on the application.
  • the substrate particularly preferably consists of cardboard, cardboard or paper with a weight per unit area of 120 g / m 2 or more.
  • Documents of value for which such a security element can be used are, in particular, banknotes, shares, bonds, certificates, vouchers, checks, high-quality entry tickets, but also other papers at risk of forgery, such as passports and other identification documents, and cards such as credit or debit cards, the card body of which has at least one layer of security paper, and also product security elements such as labels, seals, packaging, folding boxes, package inserts, blisters, metal foils and the like.
  • the simplified designation of value document includes all of the above materials, documents and product security means.
  • front or back of the substrate or document of value or of the embossing tool are relative terms, which can also be referred to as “one” and “the opposite” side and which cover the majority of the total surface of the substrate or document of value or of the embossing tool form. These terms expressly do not include the side surfaces of a substrate or document of value or of the embossing tool, which, in the case of a thickness of a substrate or document of value. In the case of card bodies with a thickness of only about one millimeter or with banknotes with a thickness of only fractions of a millimeter, the side surfaces are negligibly small and are usually not provided with security elements or coatings.
  • Information within the meaning of this invention is a visually perceptible representation designed in the form of a pattern.
  • This can, for example, be an alphanumeric Form a string of digits and / or letters, a graphic illustration, an image, a text or other characters.
  • the information particularly preferably consists of positive and / or negative motifs.
  • a motif element itself is applied to the substrate, whereas in the case of a negative motif, the area surrounding the motif element is applied to the substrate.
  • a positive motif is, for example, a letter printed in dark color on the light substrate.
  • a negative motif is, for example, an area applied in dark color to the light-colored substrate, which has an unprinted area in the form of a letter within the area.
  • embossing elements or elevations or depressions of the embossing tool instead of “embossing elements or elevations or depressions of the embossing tool”, only “embossing elements” are used for the sake of simplicity. However, the statements always relate to both embossing elements and elevations or depressions of the embossing tool.
  • Fig. 1 shows a top view of a first embodiment of a distribution of embossing elements according to the invention.
  • the embossed elements are hexagonal or honeycomb-shaped and all have the same dimensions, in particular the same area. Furthermore, they have the same orientation, so they are not oriented in a twisted manner to one another. However, the embossed elements are not arranged in a regular grid, but rather distributed statistically, with adjacent embossed elements touching one another.
  • Fig. 2 shows a plan view of a second embodiment of a distribution of embossing elements according to the invention.
  • the embossed elements are hexagonal or honeycomb-shaped and all have the same dimensions, in particular the same area. However, the alignment of the embossing elements with respect to one another is statistically distributed, so that they are randomly arranged rotated relative to one another, with adjacent embossing elements touching one another.
  • Fig. 3 shows a plan view of a third embodiment of a distribution of embossing elements according to the invention.
  • the embossed elements are hexagonal or honeycomb-shaped and all have the same alignment to one another, so they are not aligned with one another in a twisted manner.
  • the area of the embossing elements is, however, distributed differently and randomly, with adjacent embossing elements touching one another.
  • Figs. 1 to 3 instead of hexagonal or honeycomb-shaped polygons, any other regular or irregular polygons can of course also be used.
  • Fig. 4 shows a plan view of a fourth embodiment of a distribution of embossed elements according to the invention.
  • the area size, shape (triangles, squares, pentagons, dodecagons) and orientation or rotation of the embossing elements is statistically distributed, with adjacent embossing elements touching each other.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Credit Cards Or The Like (AREA)
  • Printing Methods (AREA)

Description

Die Erfindung betrifft ein Sicherheitselement mit einer optisch variablen Struktur, die eine Prägestruktur und eine Beschichtung aufweist, wobei die Prägestruktur und die Beschichtung so kombiniert sind, dass wenigstens Teile der Beschichtung bei senkrechter Betrachtung vollständig sichtbar sind, bei Schrägbetrachtung aber verdeckt werden, so dass bei Änderung der Betrachtungsrichtung unterschiedliche Informationen sichtbar werden. Die Erfindung betrifft weiterhin ein Prägewerkzeug zur Herstellung eines derartigen Sicherheitselements.The invention relates to a security element with an optically variable structure which has an embossed structure and a coating, the embossed structure and the coating being combined in such a way that at least parts of the coating are completely visible when viewed perpendicularly, but are covered when viewed obliquely, so that when viewed at an angle Changing the viewing direction different information becomes visible. The invention also relates to an embossing tool for producing such a security element.

Aus WO 2013/045054 A1 ist ein Sicherheitselement mit einer optisch variablen Struktur bekannt, die eine Vielzahl von Prägeelementen aufweist, wobei jedes der Prägeelemente aus mindestens zwei Flanken besteht, die in einem bestimmten Winkel und/ oder einer bestimmten Richtung aufeinander zulaufen. Die Oberfläche der Prägeelemente ist reflektierend ausgeführt. Des Weiteren besteht das Sicherheitselement aus mindestens zwei Gruppen von Prägeelementen, wobei sich die mindestens zwei Gruppen lediglich in dem Winkel und/oder der Richtung, mit dem bzw. der die Flanken der Prägeelemente aufeinander zulaufen, voneinander unterscheiden. Jedes Prägeelement der WO 2013/045054 weist eine regelmäßige sechseckige Grundfläche auf.Out WO 2013/045054 A1 a security element with an optically variable structure is known which has a plurality of embossed elements, each of the embossed elements consisting of at least two flanks which converge at a specific angle and / or a specific direction. The surface of the embossing elements is reflective. Furthermore, the security element consists of at least two groups of embossed elements, the at least two groups only differing from one another in the angle and / or the direction at which the flanks of the embossed elements converge. Each embossing element of the WO 2013/045054 has a regular hexagonal base.

Aus EP 2 889 152 A1 ist ein Sicherheitselement zur Darstellung zumindest einer optisch variablen Information bekannt. Das Sicherheitselement weist ein Trägersubstrat mit gegenüberliegenden ersten und zweiten Hauptflächen auf, einer auf der ersten Hauptfläche angeordneten Reflexionsschicht und einem in oder über der Reflexionsschicht vorliegenden Raster optisch wirksamer Elemente, die durch Prägeelemente identischer Grundform gebildet sind. Die Prägeelemente weisen bei identischer Grundform beispielsweise eine zufällige Größenverteilung innerhalb eines bestimmten Größenintervalls auf.Out EP 2 889 152 A1 a security element for displaying at least one optically variable item of information is known. The security element has a carrier substrate with opposing first and second main surfaces on, a reflective layer arranged on the first main surface and a grid of optically effective elements which are present in or above the reflective layer and which are formed by embossed elements of identical basic shape. With an identical basic shape, the embossed elements have, for example, a random size distribution within a certain size interval.

Der Erfindung liegt die Aufgabe zugrunde, ein gattungsgemäßes Sicherheitselement derart weiterzubilden, dass der Schutz gegenüber Fälschungen weiter erhöht wird.The invention is based on the object of developing a generic security element in such a way that protection against counterfeiting is further increased.

Diese Aufgabe wird durch die Merkmale der unabhängigen Ansprüche gelöst. Weiterbildungen der Erfindung sind Gegenstand der abhängigen Ansprüche.This object is achieved by the features of the independent claims. Developments of the invention are the subject of the dependent claims.

Das erfindungsgemäße Sicherheitselement ist in Anspruch definiert.The security element according to the invention is defined in claim.

Das entsprechende erfindungsgemäße Prägewerkzeug ist in Anspruch 5 definiert.The corresponding embossing tool according to the invention is defined in claim 5.

Eine statistische Anordnung im Sinne dieser Erfindung ist eine Anordnung, bei der die Prägeelemente stochastisch oder zufällig zueinander verteilt sind. Des Weiteren ist auch eine pseudostatistische Verteilung möglich, bei der die Prägeelemente in einem bestimmten Bereich statistisch verteilt sind, wobei sich dieser Bereich regelmäßig wiederholt. Die Prägestruktur besteht in diesem Fall aus einer regelmäßigen Anordnung von gleichen Bereichen, wobei innerhalb eines Bereichs die Prägeelemente statistisch verteilt sind.A statistical arrangement within the meaning of this invention is an arrangement in which the embossing elements are distributed stochastically or randomly to one another. Furthermore, a pseudo-statistical distribution is also possible in which the embossing elements are statistically distributed in a certain area, this area being repeated regularly. In this case, the embossed structure consists of a regular arrangement of identical areas, the embossed elements being statistically distributed within one area.

Die Tiefe der der jeweiligen Erhöhung oder Vertiefung in dem Prägewerkzeug ist dabei bekanntlich geringfügig größer als die der korrespondierenden Prägeelemente im Substrat des Sicherheitselements, die mit diesem Prägewerkzeug hergestellt wurden. Dieser Unterschied zwischen der Tiefe/Höhe der Strukturen im Prägewerkzeug und der Höhe/Tiefe der Prägestrukturen im Substrat hat seine Ursache darin, dass das Substrat beim Prägevorgang nicht vollständig in die Vertiefungen bzw. auf die Erhöhungen des Prägewerkzeugs gepresst werden kann, bzw. nach dem Prägevorgang, abhängig von den Substrateigenschaften in geringem Maße relaxieren.The depth of the respective elevation or depression in the embossing tool is known to be slightly greater than that of the corresponding embossing elements in the substrate of the security element that were produced with this embossing tool. This difference between the depth / height of the structures in the embossing tool and the height / depth of the embossing structures in the substrate is caused by the fact that the substrate cannot be pressed completely into the depressions or on the elevations of the embossing tool during the embossing process, or after the Relax the embossing process to a small extent, depending on the substrate properties.

Gemäß einer vorteilhaften Ausführungsform sind die Prägeelemente oder Erhöhungen oder Vertiefungen des Prägewerkzeugs in Bezug auf ihre Anordnung und/oder Verteilung und/oder Größe und/oder Umrissform und/oder Ausrichtung statistisch zueinander angeordnet. Beispielsweise weisen die Prägeelemente oder Erhöhungen oder Vertiefungen des Prägewerkzeugs die gleiche Umrissform, Größe und Ausrichtung auf und sind statistisch in Bezug auf den jeweiligen Abstand zueinander angeordnet. Des Weiteren können die Prägeelemente oder Erhöhungen oder Vertiefungen des Prägewerkzeugs auch die gleiche Umrissform und Größe aufweisen und statistisch in Bezug auf die jeweilige Ausrichtung zueinander angeordnet sein.According to an advantageous embodiment, the embossing elements or elevations or depressions of the embossing tool are arranged statistically with respect to one another with regard to their arrangement and / or distribution and / or size and / or outline shape and / or alignment. For example, the embossing elements or elevations or depressions of the embossing tool have the same outline shape, size and orientation and are arranged statistically in relation to the respective distance from one another. Furthermore, the embossing elements or elevations or depressions of the embossing tool can also have the same outline shape and size and be arranged statistically with respect to the respective alignment to one another.

Erfindungsgemäß ist zwischen zwei benachbarten Prägeelementen oder Erhöhungen oder Vertiefungen des Prägewerkzeugs ein Plateau angeordnet, dessen Steigung etwa dem Mittelwert der Steigungen der beiden benachbarten Prägeelemente oder Erhöhungen oder Vertiefungen des Prägewerkzeugs entspricht. Die Breite dieses Plateaus und damit der Abstand der Außenkanten der beiden benachbarten Prägeelemente oder Erhöhungen oder Vertiefungen des Prägewerkzeugs sollte maximal die Hälfte des Mittelwerts der lateralen Ausdehnung der beiden benachbarten Prägeelemente oder Erhöhungen oder Vertiefungen des Prägewerkzeugs betragen. Ein Plateau sollte also nur etwa halb so breit sein, wie die Breite eines der es begrenzenden Prägeelemente oder Erhöhungen oder Vertiefungen des Prägewerkzeugs.According to the invention, a plateau is arranged between two adjacent embossing elements or elevations or depressions of the embossing tool, the slope of which corresponds approximately to the mean value of the inclines of the two adjacent embossing elements or elevations or depressions of the embossing tool. The width of this plateau and thus the distance between the outer edges of the two adjacent embossing elements or elevations or depressions of the embossing tool should not exceed half of the mean of the lateral Extent of the two adjacent embossing elements or elevations or depressions of the embossing tool. A plateau should therefore only be about half as wide as the width of one of the embossing elements or elevations or depressions of the embossing tool that delimit it.

Besonders zweckmäßig ist es darüber hinaus, wenn die Vertiefungen oder Erhöhungen des Prägewerkzeugs an ihrem Rand weich in das sie umgebende Oberfläche des Prägewerkzeugs übergehen um bei einem Prägevorgang keine Substratverletzungen zu erhalten. Ebenso beeinflusst die Steilheit der Flanken das Reißverhalten des Substrates.In addition, it is particularly expedient if the indentations or elevations of the embossing tool merge softly at their edge into the surrounding surface of the embossing tool in order to avoid any substrate damage during an embossing process. The steepness of the flanks also influences the tear behavior of the substrate.

Besonderer Vorteil der Erfindung ist, dass individuelle Muster oder Serien von Mustern erstellt werden können, wobei für jeden Anwendungsfall eine individuelle statistische Anordnung der Prägeelemente bzw. Erhöhungen oder Vertiefungen des Prägewerkzeugs verwendet wird. Verschiedene Muster oder verschiedene Serien von Mustern weisen dabei verschiedene statistische Anordnung der Prägeelemente bzw. Erhöhungen oder Vertiefungen des Prägewerkzeugs auf, wobei insbesondere innerhalb einer Serie von Mustern die alle Muster die gleiche statistische Verteilung aufweisen. Derartige Muster sind beispielsweise Musterbanknoten oder Musterverpackungen. Die Muster können Kunden- oder Auftrags-spezifisch verwendet werden und so Fälschungen und Plagiate erkannt werden.A particular advantage of the invention is that individual patterns or series of patterns can be created, an individual statistical arrangement of the embossing elements or elevations or depressions of the embossing tool being used for each application. Different patterns or different series of patterns have different statistical arrangements of the embossing elements or elevations or depressions of the embossing tool, in particular within a series of patterns all of the patterns having the same statistical distribution. Such patterns are, for example, sample banknotes or sample packaging. The patterns can be used for specific customers or orders, so that counterfeits and plagiarism can be recognized.

Gemäß einer vorteilhaften Ausführungsform ist die statistische Variation so klein, dass sie optisch nicht oder nur unwesentlich auffällt, aber mittels eine Computer-Algorithmus erkannt wird. Die statistische Variation ist also so klein, dass sie mit einem unbewaffneten Auge nicht als solche erkannt werden kann.According to an advantageous embodiment, the statistical variation is so small that it is optically not noticeable or only insignificantly, but is recognized by means of a computer algorithm. The statistical variation is so small that it cannot be seen as such with the naked eye.

Gemäß einer vorteilhaften Ausführungsform befindet sich zwischen den einzelnen Prägeelementen ein geringfügiger Abstand, sodass keine oder nur wenige Berührungspunkte zwischen den einzelnen Prägeelementen gegeben sind. Dabei ist der Abstand zwischen den einzelnen Prägeelementen 0 µm bis 1000 µm, bevorzugt 0 µm bis 300 µm, besonders bevorzugt 0 µm bis 150 µm.According to an advantageous embodiment, there is a slight distance between the individual embossing elements, so that there are no or only a few points of contact between the individual embossing elements. The distance between the individual embossed elements is 0 μm to 1000 μm, preferably 0 μm to 300 μm, particularly preferably 0 μm to 150 μm.

Die Prägeelemente bzw. die Erhöhungen oder Vertiefungen des Prägewerkzeugs weisen bevorzugt eine Tiefe von 30 µm bis 1000 µm, besonders bevorzugt von 30 µm bis 150 µm und ganz besonders bevorzugt von 50 µm bis 120 µm auf.The embossing elements or the elevations or depressions of the embossing tool preferably have a depth of 30 μm to 1000 μm, particularly preferably 30 μm to 150 μm and very particularly preferably 50 μm to 120 μm.

Gemäß einer weiteren vorteilhaften Ausführungsform ist die Außenkontur der Prägeelemente bzw. Erhöhungen oder Vertiefungen des Prägewerkzeugs dreieckig, viereckig, fünfeckig, sechseckig bzw. wabenförmig oder vieleckig bzw. polygonal ausgestaltet.According to a further advantageous embodiment, the outer contour of the embossing elements or elevations or depressions of the embossing tool is triangular, square, pentagonal, hexagonal or honeycomb or polygonal or polygonal.

Die Erhöhungen oder Vertiefungen des Prägewerkzeugs werden bevorzugt mit einem Laser erzeugt, um eine höheres Aspekt- bzw. Tiefen- oder Höhenzu-Breiten-Verhältnis, eine größere Geometrievielfalt und steilere Flanken erzeugen zu können.The elevations or depressions of the embossing tool are preferably generated with a laser in order to be able to generate a higher aspect or depth or height-to-width ratio, a greater variety of geometries and steeper flanks.

Gemäß einer weiteren vorteilhaften Ausführungsform ist die Beschichtung des Sicherheitselements eine metallische oder metallisch anmutende Fläche, die beispielsweise im Siebdruck, Offsetdruck, indirekten Hochdruck, Hochdruck, Digitaldruck oder im Tiefdruck auf das Substrat aufgebracht wird, ein silberfarbener Patch oder eine Kalt- oder Heißfolie oder ein kaschiertes Material, der bzw. das auf das Substrat aufgebracht wird. Des Weiteren kann das Material des Substrats selbst bereits metallisch spiegelnd oder reflektierend ausgestaltet sein.According to a further advantageous embodiment, the coating of the security element is a metallic or metallic-looking surface that is applied to the substrate, for example by screen printing, offset printing, indirect letterpress, letterpress, digital printing or gravure printing, a silver-colored patch or a cold or hot foil or a laminated material that is applied to the substrate. Furthermore, the material of the substrate itself can already be designed to be metallically specular or reflective.

Ein optisch variables Element im Sinne dieser Erfindung ist ein Element, dessen visuelles Erscheinungsbild sich bei Verkippen oder Drehen des Elements ändert. Beispielsweise ändert sich bei Verkippen oder Drehen des optisch variablen Elements dessen Farbe, bewegt sich scheinbar ein Balken von einer Seite des Elements zu einer anderen Seite, werden beim Verkippen oder Drehen unterschiedliche Zeichen dargestellt oder ergibt sich ein sogenannter Pumpeffekt in Form einer sich vergrößernden oder verkleinernden Umrisslinie eines Bildmotivs.An optically variable element in the context of this invention is an element whose visual appearance changes when the element is tilted or rotated. For example, when the optically variable element is tilted or rotated, its color changes, a bar appears to move from one side of the element to another side, different characters are displayed when tilted or rotated, or a so-called pumping effect results in the form of an enlarging or decreasing effect Outline of an image motif.

Das Substrat besteht besonders bevorzugt aus Papier aus Baumwollfasern, wie es beispielsweise für Banknoten verwendet wird, oder aus anderen natürlichen Fasern oder aus Synthesefasern oder einer Mischung aus natürlichen und synthetischen Fasern, oder aus mindestens einer Kunststofffolie. Weiterhin bevorzugt besteht das Substrat aus einer Kombination aus mindestens zwei übereinander angeordneten und miteinander verbundenen unterschiedlichen Substraten, einem sogenannten Hybrid. Hierbei besteht das Substrat beispielsweise aus einer Kombination Kunststofffolie-Papier-Kunststofffolie, d.h. ein Substrat aus Papier wird auf jeder seiner beiden Seiten durch eine Kunststofffolie bedeckt, oder aus einer Kombination Papier-Kunststofffolie-Papier, d.h. ein Substrat aus einer Kunststofffolie wird auf jeder seiner beiden Seiten durch Papier bedeckt.The substrate particularly preferably consists of paper made of cotton fibers, as is used for example for banknotes, or of other natural fibers or of synthetic fibers or a mixture of natural and synthetic fibers, or of at least one plastic film. Furthermore, the substrate preferably consists of a combination of at least two different substrates arranged one above the other and connected to one another, a so-called hybrid. Here, the substrate consists for example of a combination of plastic film-paper-plastic film, i.e. a substrate made of paper is covered on either of its two sides by a plastic film, or of a combination paper-plastic film-paper, i.e. a substrate made of a plastic film is covered on each of its two sides by paper.

Angaben zum Gewicht des verwendeten Substrats von Banknoten sind beispielsweise in der Schrift DE 102 43 653 A9 angegeben. Die Schrift DE 102 43 653 A9 führt insbesondere aus, dass die Papierschicht üblicherweise ein Gewicht von 50 g/m2 bis 100 g/m2 aufweist, vorzugsweise von 80 g/m2 bis 90 g/m2. Selbstverständlich kann je nach Anwendung jedes andere geeignete Gewicht eingesetzt werden.Information on the weight of the substrate used for banknotes is given, for example, in the document DE 102 43 653 A9 specified. The font DE 102 43 653 A9 states in particular that the paper layer usually has a weight of 50 g / m 2 to 100 g / m 2 , preferably 80 g / m 2 to 90 g / m 2 . Of course, any other suitable weight can be used depending on the application.

Besonders bevorzugt besteht das Substrat aus einer Pappe, Karton oder einem Papier mit einem Flächengewicht von 120 g/m2 oder mehr.The substrate particularly preferably consists of cardboard, cardboard or paper with a weight per unit area of 120 g / m 2 or more.

Wertdokumente, für die ein derartiges Sicherheitselement verwendet werden kann, sind insbesondere Banknoten, Aktien, Anleihen, Urkunden, Gutscheine, Schecks, hochwertige Eintrittskarten, aber auch andere fälschungsgefährdete Papiere, wie Pässe und sonstige Ausweisdokumente, sowie Karten, wie beispielsweise Kredit- oder Debitkarten, deren Kartenkörper mindestens eine Lage eines Sicherheitspapiers aufweist, und auch Produktsicherungselemente, wie Etiketten, Siegel, Verpackungen, Faltschachteln, Beipackzettel, Blister, Metallfolien und dergleichen.Documents of value for which such a security element can be used are, in particular, banknotes, shares, bonds, certificates, vouchers, checks, high-quality entry tickets, but also other papers at risk of forgery, such as passports and other identification documents, and cards such as credit or debit cards, the card body of which has at least one layer of security paper, and also product security elements such as labels, seals, packaging, folding boxes, package inserts, blisters, metal foils and the like.

Die vereinfachte Benennung Wertdokument schließt alle oben genannten Materialien, Dokumente und Produktsicherungsmittel ein.The simplified designation of value document includes all of the above materials, documents and product security means.

Die Begriffe "Vorderseite" oder "Rückseite" des Substrats oder Wertdokuments oder des Prägewerkzeugs sind relative Begriffe, die auch als "die eine" und "die gegenüberliegende" Seite bezeichnet werden können und die den überwiegenden Anteil der Gesamtoberfläche des Substrats oder Wertdokuments oder des Prägewerkzeugs bilden. Ausdrücklich nicht umfasst mit diesen Begriffen sind die Seitenflächen eines Substrats oder Wertdokuments oder des Prägewerkzeugs, die bei einer Dicke eines Substrats oder Wertdokuments. Bei Kartenkörpern mit nur etwa einen Millimeter Dicke oder bei Banknoten mit einer Dicke von nur Bruchteilen eines Millimeters sind die Seitenflächen verschwindend gering sind und werden üblicherweise nicht mit Sicherheitselementen oder Beschichtungen versehen.The terms "front" or "back" of the substrate or document of value or of the embossing tool are relative terms, which can also be referred to as "one" and "the opposite" side and which cover the majority of the total surface of the substrate or document of value or of the embossing tool form. These terms expressly do not include the side surfaces of a substrate or document of value or of the embossing tool, which, in the case of a thickness of a substrate or document of value. In the case of card bodies with a thickness of only about one millimeter or with banknotes with a thickness of only fractions of a millimeter, the side surfaces are negligibly small and are usually not provided with security elements or coatings.

Eine Information im Sinne dieser Erfindung ist eine musterförmig gestaltete und visuell wahrnehmbare Darstellung. Diese kann beispielsweise eine alphanumerische Zeichenfolge aus Ziffern und/oder Buchstaben, eine graphische Abbildung, ein Bild, einen Text oder sonstige Zeichen bilden. Besonders bevorzugt besteht die Information dabei aus positiven oder/und negativen Motiven. Bei einem positiven Motiv wird hierbei ein Motivelement selbst auf das Substrat aufgebracht, wohingegen bei einem negativen Motiv der das Motivelement umgebende Bereich auf das Substrat aufgebracht wird. Ein positives Motiv ist beispielsweise ein in dunkler Farbe auf das helle Substrat aufgedruckter Buchstabe. Ein negatives Motiv ist beispielsweise eine in dunkler Farbe auf das helle Substrat aufgebrachte Fläche, die innerhalb der Fläche einen unbedruckten Bereich in Form eines Buchstabens aufweist.Information within the meaning of this invention is a visually perceptible representation designed in the form of a pattern. This can, for example, be an alphanumeric Form a string of digits and / or letters, a graphic illustration, an image, a text or other characters. The information particularly preferably consists of positive and / or negative motifs. In the case of a positive motif, a motif element itself is applied to the substrate, whereas in the case of a negative motif, the area surrounding the motif element is applied to the substrate. A positive motif is, for example, a letter printed in dark color on the light substrate. A negative motif is, for example, an area applied in dark color to the light-colored substrate, which has an unprinted area in the form of a letter within the area.

Es versteht sich, dass die vorstehend genannten und die nachfolgend noch zu erläuternden Merkmale nicht nur in den angegebenen Kombinationen, sondern auch in anderen Kombinationen einsetzbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen, soweit dies von dem Schutzumfang der Ansprüche erfasst ist.It goes without saying 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 without departing from the scope of the present invention, insofar as this is covered by the scope of protection of the claims.

Anhand der nachfolgenden Ausführungsbeispiele und der ergänzenden Figuren werden die Vorteile der Erfindung erläutert. Die Ausführungsbeispiele stellen bevorzugte Ausführungsformen dar, auf die jedoch die Erfindung in keinerlei Weise beschränkt sein soll. Des Weiteren sind die Darstellungen in den Figuren des besseren Verständnisses wegen stark schematisiert und spiegeln nicht die realen Gegebenheiten wider. Insbesondere entsprechen die in den Figuren gezeigten Proportionen nicht den in der Realität vorliegenden Verhältnissen und dienen ausschließlich zur Verbesserung der Anschaulichkeit.The advantages of the invention are explained on the basis of the following exemplary embodiments and the supplementary figures. The exemplary embodiments represent preferred embodiments to which, however, the invention is not intended to be restricted in any way. Furthermore, the representations in the figures are highly schematic for better understanding and do not reflect the real conditions. In particular, the proportions shown in the figures do not correspond to the conditions present in reality and serve exclusively to improve the clarity.

Die in den folgenden Beispielen beschriebenen Ausführungsformen sind der besseren Verständlichkeit wegen auf die wesentlichen Kerninformationen reduziert. Bei der praktischen Umsetzung können wesentlich komplexere Muster oder Bilder im Ein- oder Mehrfarbendruck als Beschichtung zur Anwendung kommen. Dasselbe gilt für die Prägestrukturen. Die in den folgenden Beispielen dargestellten Informationen können ebenfalls durch beliebig aufwendige Bild- oder Textinformationen ersetzt werden. Die Erzeugung der Beschichtung z. B. als Aufdruck nutzt üblicherweise die Möglichkeiten der Drucktechnik aus.The embodiments described in the following examples are reduced to the essential core information for better understanding. In the practical implementation can be much more complex Patterns or images in single or multi-color printing are used as a coating. The same applies to the embossed structures. The information presented in the following examples can also be replaced by any complex image or text information. The generation of the coating z. B. as an imprint usually uses the possibilities of printing technology.

Ferner werden in den folgenden Beispielen lediglich die Ausgestaltung und gegenseitige Zuordnung der Prägestruktur und der Beschichtung dargestellt, um die optischen Effekte der erfindungsgemäßen optisch variablen Struktur anschaulich darstellen zu können.Furthermore, in the following examples only the design and mutual association of the embossed structure and the coating are shown in order to be able to clearly show the optical effects of the optically variable structure according to the invention.

Im Einzelnen zeigen schematisch:

Fig. 1
in Draufsicht ein erstes Ausführungsbeispiel einer erfindungsgemäßen Verteilung von Prägeelementen oder Erhöhungen oder Vertiefungen des Prägewerkzeugs,
Fig. 2
in Draufsicht ein zweites Ausführungsbeispiel einer erfindungsgemäßen Verteilung von Prägeelementen oder Erhöhungen oder Vertiefungen des Prägewerkzeugs,
Fig. 3
in Draufsicht ein drittes Ausführungsbeispiel einer erfindungsgemäßen Verteilung von Prägeelementen oder Erhöhungen oder Vertiefungen des Prägewerkzeugs,
Fig. 4
in Draufsicht ein viertes Ausführungsbeispiel einer erfindungsgemäßen Verteilung von Prägeelementen oder Erhöhungen oder Vertiefungen des Prägewerkzeugs.
In detail show schematically:
Fig. 1
a top view of a first embodiment of a distribution of embossing elements or elevations or depressions of the embossing tool according to the invention,
Fig. 2
a plan view of a second embodiment of a distribution according to the invention of embossing elements or elevations or depressions of the embossing tool,
Fig. 3
a top view of a third embodiment of a distribution according to the invention of embossing elements or elevations or depressions of the embossing tool,
Fig. 4
in plan view a fourth embodiment of a distribution of embossing elements or elevations or depressions of the embossing tool according to the invention.

Im Folgenden wird anstatt "Prägeelemente oder Erhöhungen oder Vertiefungen des Prägewerkzeugs" zur Vereinfachung nur noch von "Prägeelementen" gesprochen. Die Ausführungen betreffen jedoch immer sowohl Prägeelemente als auch Erhöhungen oder Vertiefungen des Prägewerkzeugs.In the following, instead of “embossing elements or elevations or depressions of the embossing tool”, only “embossing elements” are used for the sake of simplicity. However, the statements always relate to both embossing elements and elevations or depressions of the embossing tool.

Fig. 1 zeigt in Draufsicht ein erstes Ausführungsbeispiel einer erfindungsgemäßen Verteilung von Prägeelementen. Die Prägeelemente sind sechseckig bzw. wabenförmig ausgeformt und weisen alle die gleichen Abmessungen, insbesondere die gleiche Fläche auf. Des Weiteren weisen sie die gleiche Ausrichtung auf, sie sind also nicht verdreht zueinander ausgerichtet. Allerdings sind die Prägeelemente nicht in einem regelmäßigen Raster angeordnet, sondern statistisch verteilt, wobei sich benachbarte Prägeelemente berühren. Fig. 1 shows a top view of a first embodiment of a distribution of embossing elements according to the invention. The embossed elements are hexagonal or honeycomb-shaped and all have the same dimensions, in particular the same area. Furthermore, they have the same orientation, so they are not oriented in a twisted manner to one another. However, the embossed elements are not arranged in a regular grid, but rather distributed statistically, with adjacent embossed elements touching one another.

Fig. 2 zeigt in Draufsicht ein zweites Ausführungsbeispiel einer erfindungsgemäßen Verteilung von Prägeelementen. Die Prägeelemente sind sechseckig bzw. wabenförmig ausgeformt und weisen alle die gleichen Abmessungen, insbesondere die gleiche Fläche auf. Die Ausrichtung der Prägeelemente zueinander ist jedoch statistisch verteilt, so dass sie zufällig zueinander verdreht angeordnet sind, wobei sich benachbarte Prägeelemente berühren. Fig. 2 shows a plan view of a second embodiment of a distribution of embossing elements according to the invention. The embossed elements are hexagonal or honeycomb-shaped and all have the same dimensions, in particular the same area. However, the alignment of the embossing elements with respect to one another is statistically distributed, so that they are randomly arranged rotated relative to one another, with adjacent embossing elements touching one another.

Fig. 3 zeigt in Draufsicht ein drittes Ausführungsbeispiel einer erfindungsgemäßen Verteilung von Prägeelementen. Die Prägeelemente sind sechseckig bzw. wabenförmig ausgeformt und weisen alle die gleiche Ausrichtung zueinander auf, sie sind also nicht verdreht zueinander ausgerichtet. Die Fläche der Prägeelemente ist jedoch unterschiedlich und zufällig verteilt, wobei sich benachbarte Prägeelemente berühren. Fig. 3 shows a plan view of a third embodiment of a distribution of embossing elements according to the invention. The embossed elements are hexagonal or honeycomb-shaped and all have the same alignment to one another, so they are not aligned with one another in a twisted manner. The area of the embossing elements is, however, distributed differently and randomly, with adjacent embossing elements touching one another.

In Fig. 1 bis 3 können statt sechseckig oder wabenförmig selbstverständlich auch beliebige andere regelmäßig oder unregelmäßig geformte Polygone eingesetzt werden.In Figs. 1 to 3 Instead of hexagonal or honeycomb-shaped polygons, any other regular or irregular polygons can of course also be used.

Fig. 4 zeigt in Draufsicht ein viertes Ausführungsbeispiel einer erfindungsgemäßen Verteilung von Prägeelementen. Die Flächengröße, Form (Dreiecke, Vierecke, Fünfecke, Zwölfecke) und Ausrichtung bzw. Verdrehung der Prägeelemente ist hierbei statistisch verteilt, wobei sich benachbarte Prägeelemente berühren. Fig. 4 shows a plan view of a fourth embodiment of a distribution of embossed elements according to the invention. The area size, shape (triangles, squares, pentagons, dodecagons) and orientation or rotation of the embossing elements is statistically distributed, with adjacent embossing elements touching each other.

Claims (9)

  1. Security element with an optically variable structure which has an embossed structure and a coating, wherein the embossed structure and the coating are combined in such a way that at least parts of the coating are completely visible when viewed vertically but are hidden when viewed obliquely, so that different information becomes visible as the viewing direction is changed, wherein the embossed structure comprises a multiplicity of embossed elements which are arranged randomly relative to one another, characterized in that between two adjacent embossed elements there is arranged a plateau, the slope of which corresponds approximately to the average of the slopes of the two adjacent embossed elements.
  2. Security element according to Claim 1, characterized in that the embossed elements are arranged randomly relative to one another in relation to their arrangement and/or distribution and/or size and/or outline shape and/or alignment.
  3. Security element according to Claim 1 or 2, characterized in that the width of the flat region or plateau is at most half the average of the lateral extent of the two adjacent embossed elements.
  4. Security element according to one of the preceding claims, characterized in that the embossed elements have a depth of 30 µm to 1000 µm, preferably of 30 µm to 150 µm and particularly preferably of 50 µm to 120 µm.
  5. Embossing tool for producing a security element with an optically variable structure which has an embossed structure and a coating, wherein the embossed structure and the coating are combined in such a way that at least parts of the coating are completely visible when viewed vertically but are hidden when viewed obliquely, so that different information becomes visible as the viewing direction is changed, wherein the embossing tool for producing the embossed structure has a multiplicity of elevations or recesses which are arranged randomly relative to one another, characterized in that between two adjacent elevations or recesses of the embossing tool there is arranged a flat region or a plateau, the slope of which corresponds approximately to the average of the slopes of the two adjacent elevations or recesses of the embossing tool.
  6. Embossing tool according to Claim 5, characterized in that the embossing tool is an embossing cylinder, an embossing punch or a printing plate, in particular an intaglio printing plate.
  7. Embossing tool according to either of Claims 5 and 6, characterized in that the elevations or recesses of the embossing tool are arranged randomly relative to one another in relation to their arrangement and/or distribution and/or size and/or outline shape and/or alignment.
  8. Embossing tool according to one of Claims 5 to 7, characterized in that the width of the flat region or plateau is at most half the average of the lateral extent of the two adjacent elevations or recesses of the embossing tool.
  9. Embossing tool according to one of Claims 5 to 8, characterized in that the first elevation or recess of the embossing tool has a depth of 30 µm to 1000 µm, preferably of 30 µm to 150 µm and particularly preferably of 50 µm to 120 µm.
EP19000023.2A 2018-01-15 2019-01-11 Security element comprising an optically variable structure made from statistically arranged embossing elements Active EP3511175B1 (en)

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DE102018000244.7A DE102018000244A1 (en) 2018-01-15 2018-01-15 Security element with a visually variable structure of statistically arranged embossing elements

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Publication number Priority date Publication date Assignee Title
DE10243653A1 (en) 2002-09-19 2004-04-01 Giesecke & Devrient Gmbh security paper
DE102005011612A1 (en) * 2004-08-13 2006-02-23 Giesecke & Devrient Gmbh Data carrier with an optically variable structure
WO2012143426A1 (en) * 2011-04-20 2012-10-26 Rolic Ag Asymmetric optically effective surface relief microstructures and method of making them
DE102011114645A1 (en) 2011-09-30 2013-04-04 Giesecke & Devrient Gmbh Security element with an optically variable structure of micromirrors
DE102013021806A1 (en) * 2013-12-20 2015-06-25 Giesecke & Devrient Gmbh Security elements for displaying at least one optically variable information
JP6937243B2 (en) * 2015-04-16 2021-09-22 ロリク アーゲーＲｏｌｉｃ Ａｇ Multiple image scattering device

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