EP1924446B1 - Certificat d'authenticité avec micro-image de refraction - Google Patents

Certificat d'authenticité avec micro-image de refraction Download PDF

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Publication number
EP1924446B1
EP1924446B1 EP06776847.3A EP06776847A EP1924446B1 EP 1924446 B1 EP1924446 B1 EP 1924446B1 EP 06776847 A EP06776847 A EP 06776847A EP 1924446 B1 EP1924446 B1 EP 1924446B1
Authority
EP
European Patent Office
Prior art keywords
line pattern
micro
lenses
lines
authenticity certificate
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.)
Active
Application number
EP06776847.3A
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German (de)
English (en)
Other versions
EP1924446A2 (fr
Inventor
Jörg Zintzmeyer
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.)
KBA Notasys SA
Original Assignee
KBA Notasys SA
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.)
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Publication date
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Application filed by KBA Notasys SA filed Critical KBA Notasys SA
Publication of EP1924446A2 publication Critical patent/EP1924446A2/fr
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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
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • 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

Definitions

  • the invention relates to a certificate of authenticity with a micro-refraction image.
  • Refraction images consist of a periodic line pattern applied to a substrate and a lens pattern covering the line pattern of cylindrical lenses parallel to the lines of the lens pattern.
  • a periodic line pattern applied to a substrate and a lens pattern covering the line pattern of cylindrical lenses parallel to the lines of the lens pattern.
  • different lines are visible, which together give the perceived image.
  • the viewing angle dependent effects may be a color change, a shape change, or a combination of color change and shape change.
  • refraction images can be used as security features in certificates of authenticity or securities. However, they are not particularly tamper-proof because they have a relatively coarse structure.
  • the lens structure are made by extruding transparent plastic or by mechanical deformation. With such a manufacturing method, lens structures in which the lens width can hardly be less than several 1/10 mm can be obtained. Accordingly coarse is the underlying line pattern.
  • a method for producing a stereoscopic image with a lenticular screen comprising applying a clay-like coating layer to a base film, printing specific linear or dotted images on the coated base film, applying an adhesive layer to the printed base film, adhering the film to the base film Back of the lenticular screen and peeling the film from the coating layer, wherein the coating layer properties of peelability and printability, and the printed images produce stereoscopic views when viewed through the lenticular screen.
  • a tamper resistant structure comprising: an information containing structure; and a transparent structure comprising a first lens element and a second lens element both formed on an outer surface of the transparent structure, the first lens element constructed and arranged to have at least one of (i) non-parallel, (ii (iii) is unevenly shaped, (iv) is irregular in width, and (v) is dimensioned nonuniformly in height with respect to the second lens element, and wherein the information containing structure contains information obtained by looking through the transparent structure see is.
  • an identification card in which information is introduced by means of a laser beam in an inner layer area, which are visible in the form of changes in the optical properties of the layer material due to an irreversible, caused by the laser beam material change, the identification card consists of at least one transparent plastic layer, which is provided at least in a partial area with a surface relief in the form of a plurality of cylindrical lenses, wherein at least a part of the introduced by the laser beam information is introduced through these cylindrical lenses and wherein the visible material changes in the inner layer region to one, based on the width of the cylindrical lenses to narrow the narrow range.
  • a heat-shrinkable packaging material comprising a heat shrinkable film and a tamper evident security device, the security device having a substrate having a surface relief structure causing an optically variable effect, each surface of the substrate carrying an adhesive layer, abutting the device through one of the adhesive layers the film is attached and each adhesive layer has a strength such that the substrate, after it is adhered to a surface, can not be removed without damaging the optically variable effect.
  • the invention provides a certificate of authenticity with a micro-refraction image having all the features of claim 1, which makes counterfeiting almost impossible due to the high fineness of its line pattern.
  • the micro-refraction image according to the invention consists of a substrate, a periodic line pattern printed on the substrate and a periodic lens structure covering the line pattern from the lenses of the line pattern parallel cylindrical lenses.
  • the period of the cylindrical lenses coincides with the period of the line pattern.
  • the lenses are preferably, but not necessarily, aligned with the lines of the line pattern.
  • the lines consist of orbits of elementary pressure points or pixels (pixels).
  • the number of tracks of elementary printing dots in a period approximately between 4 and 16.
  • the height of the cylindrical lenses at the vertex is in a range of half the width of one period and about the width of one period of the line pattern.
  • the elementary pressure points only slightly greater than the achievable printing accuracy.
  • Realistic are elementary printing points of an approximately square shape with a side length of 4-8 .mu.m, in particular 6 ⁇ m or slightly more.
  • two lines per period are sufficient.
  • Each line should consist of at least two orbits of elementary pressure points. This corresponds to a period width of about 40 microns.
  • the individual cylindrical lenses have a height at the apex of preferably slightly more than half the period width.
  • Such fine lens structures can be produced by printing a transparent mass with an Intaglio printing process or by embossing the transparent mass with an Intaglio gravure plate.
  • the periodic line pattern contains a maximum number of lines, which is determined by the possibilities of the Intaglio method for producing the lens structure.
  • the cylindrical lenses must be square or square in size for semicircular or parabolic cross-sectional shape (ie their height at the apex is at least equal to half the period width).
  • the Intaglio technique structures of relief height up to about 100 ⁇ m or can be generated.
  • a period width of the line pattern of up to about 220 ⁇ m.
  • Very diverse design possibilities arise in a line pattern with seven lines per Period, where each line consists of two tracks of pressure points. With the same period width, two lines each consisting of seven lanes or even fourteen lines of only one lane each are possible.
  • the invention thus combines two printing techniques, each of which is used on the edge of its possibilities: on the one hand, the cost-offset printing method whose printing accuracy is fully exploited, and on the other hand, the also inexpensive Intagliovon, because of the limited relief heights generated to create the appropriate Lens structures can only be used because the line pattern generated with the described high-precision offset printing an extremely fine structure, and thus a correspondingly small period width, have.
  • the lines within a period of the line pattern have different colors.
  • the simultaneous offset printing is suitable for the printing of different colored lines with high dimensional accuracy.
  • cylindrical lenses with a prismatic cross-sectional shape are used.
  • Novel optical refraction image effects are possible if the line patterns and the lens structure have congruent surface areas in which the course of the lines or lenses is different from the course direction in at least one other area area.
  • a periodic line pattern is printed on a substrate with precision offset printing. Then, over the line pattern, a lens structure in a transparent mass is applied by intaglio printing or embossing of the transparent mass with an Intaglio engraving plate.
  • simultaneous offset printing which makes full use of printing accuracy, with the Intaglio technique of applying the lens pattern over the line pattern allows for extremely complex and high quality produce resolution refraction images with a variety of optical effects at low cost.
  • the substrate consists of a transparent material.
  • the lens structure is arranged on one side and the line structure on the surface of the substrate facing away therefrom. The distance between the line pattern and the lens structure due to the thickness of the substrate favors the achievable optical effects.
  • a certificate of authenticity is provided with at least one security element, which is applied to a substrate and has a periodic line structure, and with a periodic lens structure comprising parallel cylindrical lenses covering the security element.
  • the period of the lens structure coincides with the period of the line structure, respectively, and the lenses are aligned with the periodic line structure of the security element.
  • the height of the cylindrical lenses above the security element at the apex is at least half the width of one period and at most the width of one period.
  • two security elements are arranged on the same substrate. These are connected in a transition zone by overlay, so that a visually verifiable linkage of the two security elements is produced.
  • the link can e.g. be that when changing the viewing angle a color highlighted strip or the like from the one security element continuously migrates through the transition zone into the other security element.
  • the security elements may be the described micro-refraction images, but also other types of security elements such as holograms, colorgrams or kinigrams.
  • One of the security elements may be determined by one product vendor and the other by a certification authority issuing the certificate of authenticity.
  • a certificate of authenticity according to the invention consists in that it is made up of several layers, one of which is provided with adhesive properties against a product to be protected and at least one more whose removal destroys the certificate is pre-perforated or pre-punched along predetermined tear lines.
  • Such a certificate of authenticity has the function of a seal.
  • FIG. 1 10a shows a perspective view of a greatly enlarged section of a micro-refraction image at a certain viewing angle.
  • the same section of the micro-refraction image is in Fig. 1 with 10b next to it under a rotated by approximately 90 ° viewing angle.
  • Figures 12a, 12b and 12c show three manifestations of the micro-refraction image as presented to the viewer when the viewing angle is changed from the situation shown at 10a to that shown at 10b.
  • the appearance indicated by 12a is a combination of a letter "S" with the numeral "1".
  • the appearance indicated by 12c is a combination of a letter "H” with the numeral "1".
  • the intermediate appearance 12b is a transient state between the appearances 12a and 12c, the transitions being fluid.
  • Refraction images of this kind are known in principle. They consist of a periodic line pattern applied to a substrate and a lens structure covering it of cylindrical lenses parallel to the lines of the line pattern, the width of which coincides with the period width of the line pattern.
  • this consists of a plurality of parallel line sections of different lengths, wherein in each period of the line pattern, the lines may have different colors, such as the colors red, green and blue in a line pattern with three colors.
  • the line pattern is printed with offset printing, with a realistic printing accuracy of about 4 ⁇ m on a substrate. If the lines are to have different colors in each period, simultaneous offset printing is used.
  • the lens structure is printed with intaglio printing from a transparent mass.
  • the cylindrical lenses must have a peak height above the line pattern, which corresponds approximately to half the period width of the line pattern or is preferably slightly larger.
  • the structure heights possible with intaglio printing are limited.
  • the maximum possible period width of the line pattern is therefore determined by the possibilities of Intaglio réelles, while the fineness of the line pattern is limited by the possibilities of offset printing. This situation will be described below on the basis of Fig. 3 and 4 be explained in more detail.
  • "BP" designates an elementary pixel which is assumed to be ideally square with a side length of little more than the achievable printing accuracy of approximately 4 ⁇ m , for example a side length of slightly more than 6 ⁇ m .
  • a first dotted line 14 schematically illustrates a limit of intailible with intaglio structures. She has a Structure height of about 12 pixels BP and a feature width of about 14 pixels BP.
  • a second dotted line 16 schematically shows a limit of the fineness of a line pattern that can be achieved with offset printing.
  • a method for producing a micro-refraction image is optimally executable.
  • each period of the line pattern includes three lines and each line has a width of two pixels BP. If one accepts a line pattern with only two lines per period, the boundary line 16 reduces to only four pixels BP. Furthermore, results in Fig.
  • the corresponding structure width of the line pattern is sixteen instead of fourteen pixels BP.
  • Fig. 3 the cross section of a lens structure is shown over a line pattern consisting of fourteen parallel and contiguous printing webs of a width of one pressure point BP. If each line of the line pattern consists of two such print paths, each period of the line pattern contains seven lines which may have different colors. Alternatively, each line of the line pattern, for example, consists of only two lines, each consisting of seven printing lines of a width of one BP, or any combination of printing webs.
  • Fig. 3 various possible cross-sectional shapes of the cylindrical lenses drawn.
  • the cross-sectional shape should be "over-square", ie the peak height is greater than half the period width.
  • This cross-sectional shape is solid line in Fig. 3 located. With broken lines are less ideal cross-sectional shapes in Fig. 3 located.
  • the period width of the lens structure results from the width of the lenses and the width of the small distance between adjacent lenses.
  • the Intaglio pressure favors the wiping process with which the transparent mass is wiped off its raised surfaces after its application to the gravure plate.
  • the distance between adjacent lenses is only about one pixel or only a few pixels.
  • Fig. 4 It is assumed that in the micro-refraction image, the line pattern has only three lines of a width of two pixels each. In this case, the limits of intaglio printing at line 14 are not exhausted, but those of the offset printing at line 16. As in Fig. 3 is the ideal cross-sectional shape in Fig. 4 drawn with a solid line. Broken lines indicate less ideal cross-sectional shapes.
  • Fig. 5 shows cross-sectional shapes of the cylindrical lenses with which special optical effects can be generated.
  • 5a) is a relatively flat prismatic cross-sectional shape, in particular trapezoidal shape shown.
  • the same trapezoidal shape is shown with greater peak height.
  • An even greater peak height have the in Fig. 5c ) shown trapezoidal shapes.
  • Fig. 5d shows alternating cross-sectional shapes: a parabolic lens is followed by an asymmetrical cross-sectional shape composed of parabolic trains, again followed by a parabolic lens, etc.
  • the effects obtainable with such lens structures are very complex.
  • Fig. 5e have a triangular cross-sectional shape.
  • the triangles may be equilateral or have uneven sides or alternatively be equilateral and non-equilateral as shown.
  • Fig. 5f shows cylindrical lenses with the cross-sectional shape of a polygon, which may have the same or unequal sides, as shown.
  • Fig. 5g shows cylindrical lenses with mixed cross-sectional shapes between prismatic and parabolic.
  • a circular area 20 of parallel circular lines is placed in an outer area 22 of straight lines.
  • Fig. 6b there are two adjacent surface areas 24, 26 with 90 ° against each other twisted line patterns.
  • Fig. 6c is within the outer surface region 22 of straight lines, a square region 28 of straight, but rotated by 90 ° lines.
  • the lines in the area 30 have alternating directions, are wavy or jagged.
  • Fig. 6e an irregularly shaped area 34 of straight, 90 ° twisted lines is arranged in an outer surface area 32 of straight lines.
  • the security element 42 is represented by the designation "A1" and the security element 44 by "A3". Both security elements 42, 44 are connected by transition zones 46, 48 inextricably linked. Under an indissoluble linkage here is an interaction between the security elements 42, 44 understood, which is mediated by the transition zones by an overlay effect.
  • at at least one of the security elements 42, 44 is preferably a micro-refraction image of the type described above.
  • the other security element has a periodic structure which is matched to the lens structure of the micro-refraction image and at the same time corresponds to the line pattern of the micro-refraction image. Refraction image is covered.
  • the non-detachable link can then consist in an optical effect, for example a light strip, blinking dots, brightly lit picture elements or the like, which shifts from one security element through the transition zones into the other security element as the viewing angle changes.
  • one security element is determined by a central certification authority, the other may be determined by any third party (eg, by a product manufacturer or product distributor).
  • the one security element is then uniform, while the other is variable.
  • the certificate of authenticity shown may be used as a seal of authenticity applied to a product or packaging.
  • a seal of authenticity is in Fig. 8 shown.
  • the substrate 40 is coated on the back with an adhesive.
  • the security elements and the transition zone therebetween are deposited as a separate layer on the substrate.
  • longitudinal perforation or punching lines are provided along the desired tear lines. It can also be achieved by the tear lines that at least part of the seal remains intact after the removal of the authenticity seal from the product or from the packaging.
  • a substrate 100 made of a transparent material is used.
  • the line pattern 102 is applied.
  • a moldable transparent mass 104 is applied by a screen-printing method. With an Intaglio engraving plate 106, the transparent mass 104 is then embossed and formed into a lens structure.
  • the lens structure may alternatively be applied on the same surface as the line structure.
  • both structures are arranged on opposite surfaces, but has the Advantage that the achievable optical effects are promoted by the spatial distance.

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  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Printing Methods (AREA)
  • Credit Cards Or The Like (AREA)
  • Printing Plates And Materials Therefor (AREA)

Claims (13)

  1. Certificat d'authenticité pourvu d'au moins un élément de sécurité (42 ; 44), qui est appliqué sur un substrat (40 ; 100) et présente une structure de lignes périodiques, et d'une structure de lentilles périodiques recouvrant l'élément de sécurité (42 ; 44) et composée de lentilles cylindriques parallèles, dans lequel
    - la période des lentilles cylindriques correspond à la période du motif de lignes (102),
    - les lentilles sont orientées parallèlement aux lignes de la structure de lignes et
    - la hauteur des lentilles cylindriques sur l'arête se situe dans une plage allant d'approximativement la moitié de la largeur à approximativement une largeur totale d'une période,
    pour lequel au moins un élément de sécurité (42 ; 44) pouvant être déterminé par un tiers et un élément de sécurité (42 ; 44) pouvant être déterminé par une instance de certification centrale sont agencés sur le même substrat (40 ; 100) et la structure de lentilles s'étend au moins en partie sur les deux éléments de sécurité (42 ; 44),
    pour lequel au moins l'un des éléments de sécurité (42 ; 44) est une micro-image de réfraction, constituée du substrat (40 ; 100), du motif de lignes (102) périodiques appliqué sur le substrat (40 ; 100) et de la structure de lentilles périodiques recouvrant le motif de lignes (102) et composée des lentilles cylindriques parallèles aux lignes du motif de lignes (102), dans lequel la période des lentilles cylindriques correspond à la période du motif de lignes (102), les lignes sont constituées de bandes de points d'impression élémentaires (BP), qui est égal au nombre de bandes de points d'impression élémentaires (BP) dans une période d'au moins quatre et de maximum seize et la hauteur des lentilles cylindriques sur l'arête se situe dans une plage allant d'approximativement la moitié de la largeur à sensiblement une largeur totale d'une période,
    caractérisé en ce que le certificat d'authenticité est constitué de plusieurs couches, dont une est dotée de propriétés adhésives par rapport à un produit à protéger et dont au moins une autre, dont le retrait entraîne la destruction du certificat de sécurité, est pré-perforée ou prédécoupée le long de lignes de déchirure, dans lequel le substrat (40; 100) est constitué d'un matériau transparent et le motif de lignes (102) est agencé sur la surface du substrat (40 ; 100) opposée à la structure de lentilles,
    dans lequel un point d'impression élémentaire (BP) présente une longueur latérale comprise entre 4 µm et 8 µm.
  2. Certificat d'authenticité selon la revendication 1, caractérisé en ce que les deux éléments de sécurité (42 ; 44) sont reliés par une zone de transition (46 ; 48), qui établit une liaison vérifiable visuellement des deux éléments de sécurité (42 ; 44).
  3. Certificat d'authenticité selon la revendication 1 ou 2, caractérisé en ce que, pour la micro-image de réfraction, les lentilles sont orientées en alignement avec les lignes du motif de lignes (102).
  4. Certificat d'authenticité selon la revendication 1 ou 2 ou 3, caractérisé en ce que, pour la micro-image de réfraction, les lentilles voisines sont espacées les unes des autres.
  5. Certificat d'authenticité selon la revendication 4, caractérisé en ce que l'écart entre les lentilles voisines correspond à la largeur d'un petit nombre de points d'impression élémentaires (BP).
  6. Certificat d'authenticité selon l'une quelconque des revendications précédentes, caractérisé en ce que le motif de lignes (102) de la micro-image de réfraction est appliqué en impression offset.
  7. Certificat d'authenticité selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la structure de lentilles de la micro-image de réfraction est appliquée à partir d'une masse transparente (104) en impression en taille-douce.
  8. Certificat d'authenticité selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la structure de lentilles de la micro-image de réfraction est appliquée à partir d'une masse transparente (104) par empreinte au moyen d'une plaque de gravure en taille-douce (106).
  9. Certificat d'authenticité selon l'une quelconque des revendications précédentes, caractérisé en ce que les lentilles de la micro-image de réfraction présentent une forme de section transversale allant du demi-cercle à la parabole.
  10. Certificat d'authenticité selon l'une quelconque des revendications précédentes, caractérisé en ce que les lentilles de la micro-image de réfraction présentent une forme de section transversale prismatique.
  11. Certificat d'authenticité selon l'une quelconque des revendications précédentes, caractérisé en ce que les lentilles de la micro-image de réfraction présentent une forme de section transversale mixte prismatique/parabolique.
  12. Certificat d'authenticité selon l'une quelconque des revendications précédentes, caractérisé en ce que les lignes de la micro-image de réfraction dans les périodes du motif de lignes (102) présentent chacune des couleurs différentes.
  13. Certificat d'authenticité selon l'une quelconque des revendications précédentes, caractérisé en ce que les lignes de la micro-image de réfraction dans les périodes du motif de lignes (102) présentent des parties évidées pour la représentation de contenus d'image.
EP06776847.3A 2005-08-18 2006-08-14 Certificat d'authenticité avec micro-image de refraction Active EP1924446B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005039113A DE102005039113A1 (de) 2005-08-18 2005-08-18 Mikro-Refraktionsbild
PCT/EP2006/008038 WO2007020048A2 (fr) 2005-08-18 2006-08-14 Micro-image de refraction

Publications (2)

Publication Number Publication Date
EP1924446A2 EP1924446A2 (fr) 2008-05-28
EP1924446B1 true EP1924446B1 (fr) 2019-06-12

Family

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Application Number Title Priority Date Filing Date
EP06776847.3A Active EP1924446B1 (fr) 2005-08-18 2006-08-14 Certificat d'authenticité avec micro-image de refraction

Country Status (7)

Country Link
US (1) US20080309063A1 (fr)
EP (1) EP1924446B1 (fr)
JP (1) JP5242394B2 (fr)
CN (1) CN101291817B (fr)
CA (1) CA2619531A1 (fr)
DE (1) DE102005039113A1 (fr)
WO (1) WO2007020048A2 (fr)

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WO2007020048A2 (fr) 2007-02-22
DE102005039113A1 (de) 2007-02-22
CN101291817B (zh) 2010-12-15
WO2007020048A3 (fr) 2007-09-13
CA2619531A1 (fr) 2007-02-22
CN101291817A (zh) 2008-10-22
JP5242394B2 (ja) 2013-07-24
EP1924446A2 (fr) 2008-05-28
US20080309063A1 (en) 2008-12-18
JP2009505146A (ja) 2009-02-05

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