EP2385903B1 - Élément de sécurité ayant une structure optique variable - Google Patents

Élément de sécurité ayant une structure optique variable Download PDF

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Publication number
EP2385903B1
EP2385903B1 EP09801937.5A EP09801937A EP2385903B1 EP 2385903 B1 EP2385903 B1 EP 2385903B1 EP 09801937 A EP09801937 A EP 09801937A EP 2385903 B1 EP2385903 B1 EP 2385903B1
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EP
European Patent Office
Prior art keywords
coating
embossing
security element
depressions
line
Prior art date
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Active
Application number
EP09801937.5A
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German (de)
English (en)
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EP2385903A1 (fr
EP2385903B8 (fr
Inventor
Peter Franz
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 GmbH
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Publication of EP2385903A1 publication Critical patent/EP2385903A1/fr
Publication of EP2385903B1 publication Critical patent/EP2385903B1/fr
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Publication of EP2385903B8 publication Critical patent/EP2385903B8/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
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/425—Marking by deformation, e.g. embossing
    • 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
    • B42D2033/24—
    • B42D2035/24—

Definitions

  • the invention relates to a security element with an optically variable structure, a method for producing such a security element and a data carrier equipped with such a security element.
  • optically variable security elements For protection against counterfeiting, in particular with color copying machines or comparable reproduction methods, data carriers, such as banknotes, securities, certificates, vouchers, checks, high-quality admission tickets, but also other counterfeit-endangered papers, such as credit cards, passports and other identity documents, as well as product security elements, such as labels, Seals and packaging, equipped with optically variable security elements.
  • data carriers such as banknotes, securities, certificates, vouchers, checks, high-quality admission tickets, but also other counterfeit-endangered papers, such as credit cards, passports and other identity documents, as well as product security elements, such as labels, Seals and packaging, equipped with optically variable security elements.
  • the protection against counterfeiting is primarily based on the fact that the optically variable effects are visually simple and clear to the human observer, but that they can not be imitated with today's known reproduction devices, since these always reproduce the optically variable elements only from one viewing direction.
  • a data carrier with an optically variable element which consists of an embossed structure and a coating in the form of a printed image or line screen.
  • the embossed structure or the coating are in this case supplemented by a partial change in their structure so that either an amplification of the already known optically variable effect occurs or at least one further visually recognizable effect occurs.
  • the entirety of the optically variable effect produced by the combination of background and embossing and the added effect is visually discernible, but can not be reproduced by copiers. It can accordingly as serve information that can be used to check whether this is an original document, or in the presence of the or the optically variable effects can be ruled out that the document was produced using commercially available reproduction techniques.
  • the publication WO 2006/018232 relates to a security element with an optically variable structure having raised embossing elements and a coating combined with the raised embossing elements, in which at least parts of the coating are completely visible when viewed perpendicularly, but are obliquely obscured by the protruding elements protruding from the plane of the security element.
  • the raised embossing elements are formed by non-linear embossing elements, for example by ball sections.
  • the patent document DE 10 2006 016 342 A1 discloses a security paper with the features of the preamble of claim 1.
  • the object of the present invention is now to provide a generic security element, which avoids the disadvantages of the prior art.
  • a security element of the type mentioned in the introduction comprises a carrier with opposite first and second major surfaces and with an optically variable structure present on the first main surface.
  • the optically variable structure has an embossed structure and a coating, wherein the embossed structure and the coating are combined in such a way that at least partial areas of the coating are completely visible when viewed perpendicularly, but hidden when viewed obliquely.
  • the embossed structure is formed in the form of recesses in the first main surface of the carrier, and in the recesses at least portions of the coating are arranged.
  • the present invention differs from the above-mentioned prior art, in particular in that the embossed structure there is composed of embossed elevations on whose flanks a coating is arranged.
  • an embossing structure of recesses is used, as it arises in particular when embossing the opposite second major surface of the security element on the first major surface.
  • the fact that the embossing of elevations on the upper side of a data carrier leads to the generation of negative deformations on the underside of the data carrier is known in principle and also in the cited document WO 2006/018232 on page 23.
  • the negative deformation of the lower data carrier has hitherto always been regarded only as a concomitant of the embossing technique used and has not been associated with an optically variable structure of the relevant data carrier side.
  • the present inventors have recognized that the deformation of the back can be used to produce a self-contained optically variable structure in the embossing of a security element, without the need for a further embossing process would be necessary.
  • This not only allows the effective use of one already for another reason on the opposite Carrier side provided embossed structure, but also an advantageous vote of provided on the front and back optically variable structures.
  • the embossing of the elevations on the front side must be carried out so that the recesses formed on the back have a sufficient depth for the desired optically variable effect.
  • the inventors have further recognized that, alternatively, a direct embossing of negative structures, which could not be achieved with the previously customary printing plates, can be ensured by means of a novel milling of special printing plates by means of laser engraving.
  • the depressions are at least partially linear and are preferably arranged in the form of a line grid.
  • a line or a linear formation is understood as meaning a connection between two points in accordance with the usual mathematical definition.
  • This definition includes not only rectilinear but also curved or curved connections.
  • line-shaped depressions which have a semicircular, triangular, sinusoidal or trapezoidal profile are particularly preferred, as shown in FIG WO 97/17211 for profiles of surveys is described accordingly.
  • the recesses are at least partially non-linear, in particular in the form of a spherical segment, a tetrahedron, a truncated pyramid, a truncated cone, a cylinder section, a torus, an oval, a drop or a pyramid.
  • the depressions are advantageously arranged in the form of a grid, preferably a grid with a constant spatial frequency.
  • the depressions form while the "grid points" of the grid.
  • screen dot is understood in the usual sense in printing technology and does not mean an expansion-free point in the mathematical sense.
  • Possible raster arrangements include rasters with a constant period (constant dot size, constant dot pitch), amplitude modulated rasters (variable dot size, constant dot pitch), frequency modulated rasters (constant dot size, variable dot pitch), and higher order non-periodic pitches.
  • one-dimensional grids may also be considered, in particular for the line-shaped recesses.
  • the grid points are formed in this case by linear depressions.
  • the depth of the depressions lies in particular between 10 ⁇ m and 250 ⁇ m, preferably between 30 ⁇ m and 120 ⁇ m, particularly preferably between 35 ⁇ m and 80 ⁇ m, in each case based on the non-embossed surrounding of the depressions.
  • the depressions can also be integrated into a gravure environment.
  • the depth of the depressions is typically between 40% and 60% of the width of the wells in the case of linear depressions and between 40% and 60% of the smallest lateral dimension in the case of non-linear depressions.
  • the coating is essentially formed from line-shaped basic elements, which are preferably arranged in the form of a line grid.
  • the coating is a full-surface, linear, multi-colored grid structure containing information.
  • the information may in particular consist of a positive and / or negative representation in the form of at least one modulation of the lines of the raster structure.
  • Advantage of such an optically variable structure is that the information contained deflects the coating from registration inaccuracies of the coating. Passer inaccuracies within the coating may then still be present, so that the coating appears stained and streaky, but a viewer is more focused on the information of the coating, so that the inhomogeneous color impression recedes.
  • a modulation of a line is understood here as meaning a change in the design of the line, in particular in terms of shape, color and / or course.
  • a negative representation is a reduction in the thickness of a line
  • a positive representation is a broadening of the thickness of the line.
  • Individual lines of the grid structure are modulated in certain areas in such a way that the impression of a graphic or alphanumeric image arises for a viewer.
  • the lines may also be interrupted or angled, formed from a sequence of short breaks and points, rectangles, symbols or other geometric or alphanumeric shapes or staggered.
  • the lines may vary significantly in their color or saturation, i. H. the layer thickness of their paint job, to be changed.
  • a combination of several of these modulations is possible, such as e.g. a punctuation in a different color or a break in which the space created by the break is partially replenished by a sequence of characters, numbers and dots.
  • the coating is essentially formed from nonlinear basic elements, wherein preferably the dimension of a non-linear base element in any direction more than four times, in particular in no direction more than twice the dimension of one of the other Directions is. It has been shown that particularly impressive tilting effects of the optically variable structures can be achieved with simultaneously high freedom of design for the coating if the nonlinear basic elements have a shape that does not differ too much from the outline of a circle, triangle or square , In these elements, the dimension in no direction is more than about twice a dimension in one of the other directions.
  • the non-linear primitives advantageously have round, oval, polygonal bounded or defined by a symbol, geometric pattern or alphanumeric characters outline shapes.
  • the nonlinear basic elements are preferably arranged in the form of a one- or two-dimensional grid, preferably a grid with a constant spatial frequency. If the recesses and the nonlinear basic elements are both arranged in the form of a grid, then the spatial frequencies of the two grids can be the same or slightly different in order to produce beat or moire effects. Even by an independent choice of the spatial frequencies of depression grid and Grundianoraster can create attractive optical effects in which a desired information is visible only when viewing the optically variable structure from a certain viewing angle or at a certain angle of incidence.
  • the spatial frequency of the rasters in one dimension is typically 10 lines / cm to 100 lines / cm, preferably 15 lines / cm to 50 lines / cm, more preferably 20 lines / cm to 40 lines / cm. In two-dimensional The spatial frequencies in the two dimensions can be the same or different in grids.
  • the nonlinear basic elements advantageously have a dimension of 10 ⁇ m to 500 ⁇ m, in particular 20 ⁇ m to 250 ⁇ m, in all designs.
  • the depressions of the first main surface are produced by embossing the first main surface of the carrier.
  • the embossing structure of the first main surface can be embodied as a blind embossing or as an ink-carrying embossing.
  • the non-line-shaped basic elements are advantageously arranged at least partially on flanks of the depressions, wherein a depression and the base elements arranged on their flanks together each form a structural element which, as the smallest units, form the pixels of the information represented by the optically variable structure.
  • the optically variable structure has a multiplicity of structural elements which, when viewed vertically, represent a multicolored image motif whose visual impression varies as the viewing angle changes.
  • the structural elements can correspond to pixels of the multicolor image motif to which certain color components of a color system are assigned.
  • the basic elements in this case have colored areas in the colors of the color system, wherein the sizes of the colored areas of the basic elements correspond to the respective color proportion of the pixels.
  • the color impression of the multicolored image motif changes in a characteristic way due to the partial visibility of the basic elements.
  • the image motif is separated into its color components when tilted, or colors or patterns are amplified or deformed, as explained in more detail below with reference to embodiments.
  • the area fraction of the basic elements on the surface of the depressions is typically between 3% and 100%, with high surface coverages being used, above all, in the case of multicolor structural elements.
  • the colored areas may also overlap for higher color coverage.
  • For the basic elements usually between one and four colors are used.
  • Another overpressure can be done for example by screen printing.
  • machine-readable feature substances such as magnetic feature substances, infrared-absorbing or infrared-transparent feature substances, phosphorescent, fluorescent or other luminescent feature substances, can be incorporated into any visually visible color. In this way, the visually verifiable human feature can be combined with machine verifiability.
  • the optically variable structure has additional information which is produced by varying the coating and / or the embossed structure.
  • the additional information for example, by a variation of the shape, the size or the height of the embossing elements, in particular the non-linear embossing elements arise.
  • a variation of the arrangement of the embossing elements, in particular the non-linear embossing elements, such as a regional offset or a region-wise change in the screen width or omitting one or more embossing elements is conceivable.
  • the coating is varied in the range of additional information, this can be achieved, for example, by varying the shape or the color of the coating arise. Again, of course, a variation of the arrangement of the coating is possible, such as an offset, a change in the screen width, mirroring or omission of one or more basic elements.
  • the embossed structure may additionally be subdivided into partial regions in which different partial embossing structures are arranged.
  • the partial embossing structures are arranged offset in at least two adjoining partial areas by a fraction, in particular a third of the grid width.
  • parts of the partial embossing structures may also have an unembossed edge contour.
  • the data carrier is in particular a value document, such as a banknote, a check, a share, a passport, an admission ticket, a ticket, a certificate, a credit card, a bank card or similar.
  • the optically variable structure according to the invention can be combined with any other security feature within a data carrier.
  • the optically variable structure according to the invention can be attached via a security thread, combined with a hologram or other diffractive structures, or arranged alongside or overlapping with other optically variable structures.
  • the coating is preferably printed on the support and is used in particular in planographic printing, such as in offset printing, in high-pressure, such as in letterpress or flexographic printing, in screen printing, in gravure printing, such as in screen gravure or intaglio, or in a thermographic process, as in the thermal transfer process generated.
  • planographic printing such as in offset printing
  • high-pressure such as in letterpress or flexographic printing
  • screen printing in gravure printing, such as in screen gravure or intaglio, or in a thermographic process, as in the thermal transfer process generated.
  • in colored steel printing intaglio printing
  • the depressions of the first main surface are produced by embossing the first main surface of the carrier.
  • the embossed structure of the first main surface can be produced by a blind embossing or an ink-carrying embossing.
  • Blind embossings are produced in a printing process using a steel gravure printing plate.
  • the carrier typically a paper substrate
  • the blank embossing areas of the printing plate unlike printed image areas, are not filled with ink, so that the substrate material in these areas is only permanently deformed, ie embossed.
  • blind embossments with appropriate dimensions can also be detected tactilely, whereby the areas with blind embossing can be used as a further security feature.
  • the optically variable effect of the security element is retained, although an ink-bearing embossing is used instead of the blind embossing.
  • the optically variable structure then has a second coating, at least in some areas. This offers the advantage that the embossed structure is stabilized without additional printing and that the security element can be integrated into a intaglio print motif and thus into the color and representational design of a surrounding motif.
  • the embossed structure is produced with a stamping tool, such as a gravure printing plate, an embossing stamp or a printing plate.
  • the surface of the embossing tool on depressions which are introduced by mechanical engraving, ablation by means of a laser, scratches, for example with a diamond tip and / or etching in the surface of the embossing tool.
  • the embossing can also be produced by means of thermal processes.
  • a substrate made of plastic is thermally deformed by the action of heat, with finer structures can be displayed than with paper substrate. This method is used in particular for plastic banknotes or debit cards, debit cards, credit cards, SIM cards, customer cards or the like.
  • the substrate material for the security element is any kind of paper, in particular cotton paper.
  • paper which contains a proportion of polymeric material in the range of 0 ⁇ x ⁇ 100% by weight.
  • the substrate material is a plastic film, for. B. a polyester film or a film of PET (polyethylene terephthalate), PBT (polybutylene terephthalate), PEN (polyethylene naphthalate), PP (polypropylene), PA (polyamide), PE (polyethylene), is.
  • the film may also be monoaxially or biaxially stretched. The stretching of the film, inter alia, leads to it receiving polarizing properties that can be used as another security feature.
  • the substrate material is a multilayer composite having at least one layer of paper or a paper-like material, ie z. B. a paper-film composite.
  • a composite is characterized by an extremely high stability, which is for the durability of the substrate or disk of great advantage.
  • a paper-film composite as substrate has an internal base paper and two outer film layers, as in the document EP 1 545 902 B1 , the disclosure of which is included in the present description, described in more detail. Also advantageous is the inverse structure of a paper-film composite, in which an inner film is provided with two outer layers of paper.
  • the paper-film composite or composite composite can be z. B. be formed from the aforementioned plastic materials.
  • Such composites are characterized by a very high stability. Also, these composite materials can be used in certain climatic regions of the earth with great advantage.
  • All materials used as substrate material may have additives that serve as a mark of authenticity. It is primarily to think of luminescent, which are preferably transparent in the visible wavelength range and in the non-visible wavelength range by a suitable tool, for. B. a UV or IR radiation emitting radiation source can be excited to produce a visible or at least detectable with auxiliary luminescence.
  • Other security features can be used with advantage, as long as they do not affect the viewing of the security element according to the invention or at least not significantly.
  • protrusions on the second major surface appear as depressions on the first major surface of the carrier (then the back of the data carrier).
  • the carrier may first be provided with the coating and then embossed, or conversely, the carrier may first be embossed and then provided with the coating. Likewise, the carrier can be embossed in the same step and provided with the coating.
  • Fig. 1 shows to a banknote 10 with a security element 12 according to the invention, which is arranged in the print image area of the banknote 10.
  • the security element 12 includes an optically variable structure 16 which presents different information to the viewer under different viewing directions and thus exhibits a tilting effect.
  • Such security elements are often used in banknotes and other monetary documents, since the tilting effect can be easily visually recognized and checked by the viewer, but he just because of the directional dependence of the visual impression with today's copiers can not be reproduced, since these only the optically variable structure play from a single point of view.
  • FIGS. 2 to 6 The structure of an optically variable structure 16 according to a first embodiment of the invention will now be described with reference to FIGS FIGS. 2 to 6 explained in more detail, wherein Fig. 2 a schematic sectional position along the line II-II of Fig. 1 shows, Fig. 4 a detail of only the embossed structure 20 of the optically variable structure 16 in plan view, Fig. 5 a detail of only the coating 24 of the optically variable structure 16 in plan view and Fig. 6 the combination of the embossed structure 20 of the Fig. 4 and the coating 24 of the Fig. 5 shows.
  • an embossing structure 20 of a multiplicity of spherical-segment-shaped depressions 22 is impressed, which have a depth of 35 ⁇ m to 80 ⁇ m.
  • the recesses 22 may, for example, with the in Fig. 3 shown embossing plate 130 may be produced, which has the recesses 22 corresponding spherical segment-shaped elevations 132. Embossing plates with such spherical segment-shaped elevations are difficult to produce with milling tools, but can be produced by laser engraving.
  • the optically variable structure 16 further includes a coating 24 formed from a plurality of nonlinear pattern primitives 26, 28.
  • the pattern base elements 26, 28 are respectively arranged on the flanks of the recesses 22 and thus give the optically variable structure a different appearance depending on the viewing direction. In the vertical viewing direction 30, the coating 24 is completely visible.
  • pattern base elements 26 When viewed from the direction of view 32 lying on the flanks of the recesses 22 pattern base elements 26 are covered by the webs between the recesses 22 and are therefore largely not visible to a viewer. Accordingly, when viewed from the opposite viewing direction 34, the pattern base elements 28 are hidden and are therefore largely not visible to a viewer.
  • FIGS. 4 and 5 show for illustrative purposes a section of the embossed structure 20 and the coating 24 of the optically variable structure in a plan view, the dashed square grid 40 serving only for a clearer illustration.
  • the recesses 22 and the pattern primitives 26, 28 are each arranged in a grid with a constant spatial frequency whose horizontal and vertical grid width is generally indicated by values x and y, respectively.
  • the spatial frequency of the basic elements 26, 28 related to an imaginary reference point 46 in the center of each grid square.
  • the pattern primitives 26, 28 themselves may occupy different positions within the grid squares to come to lie on different flanks of the wells 22 and thereby be visible from different viewing directions 32, 34.
  • a depression 22 together with the pattern base element 26 or 28 arranged on its flanks forms a structural element 42 or 44, wherein the structural elements 42, 44 form as pixels the pixels of the rasterized information represented overall by the optically variable structure 16.
  • both the pattern base elements 26 and the pattern base elements 28 and thus the entire coating 24 are visible.
  • the oblique viewing direction 32 only the pattern primitives 28 are visible and only the pattern primitives 26 are visible from the opposite oblique viewing direction 34.
  • the proportion of the visible pattern base elements 26, 28 and thus also the visual impression of the optically variable structure 16 changes.
  • the pattern base elements 26 and 28 taken together may each have a partial image represent an overall picture. When viewed vertically, the overall image is then visible, but only one of the partial images when viewed obliquely.
  • the spatial frequency of the raster of the embossed structure and the coating is typically 10 to 100 lines / cm, for example 25 lines / cm, the grid width x or y so 0.1 mm to 1 mm, for example, 0.4 mm.
  • the spatial frequency of the recuperge Vietnamese- and coating grid may be the same, as in the embodiment of FIGS. 4 to 6 or may be slightly different in order to produce beating or moire effects.
  • the spatial frequencies of embossing pattern and coating grid can also be selected independently of each other, which can produce interesting visual effects in which a desired information becomes visible only when viewing the security element from a certain viewing angle or at a certain angle of incidence.
  • the coating 24 consists in the illustrated embodiment of non-linear base elements 26, 28, wherein the dimension of a non-linear base element in any direction is more than four times the dimension of one of the other directions.
  • the nonlinear basic elements in particular have a round, oval, polygonal limited or determined by a symbol, geometric pattern or alphanumeric characters contour shape and typically have dimensions between 10 .mu.m and 500 .mu.m.
  • the optically variable structure 60 includes a plurality of structural elements 62 which, when viewed vertically, represent a multicolored image motif which, upon tilting of the security element, depending on the direction of tilting in the individual Color components of a basic color system, such. B. the color components cyan, magenta and yellow or combinations of these color components separated.
  • a basic color system such as the color components cyan, magenta and yellow or combinations of these color components separated.
  • the color components of other known basic color systems are also usable.
  • the coating of the optically variable structure 60 is formed in the form of a square coating grid 50, whose pixels 52 are each assigned to one pixel of the predetermined image.
  • pattern primitives 54-c, 54-m, and 54-y are generated whose size corresponds to the color component of the corresponding base color cyan (c), magenta (m), and yellow (y) of the associated pixel of the given image, as in FIG Fig. 7 for some such pixels 52 are shown.
  • the pattern primitives 54-c are obscured and only the pattern primitives 54-m and 54-y are visible, so that only the red color portion of the color image can be seen.
  • a corresponding color separation also occurs for the other tilt directions.
  • the recesses 22 of the embossed structure 20 and the coating 50 formed from the pattern primitives 54-c, 54-m and 54-y act so that when viewed vertically, the full color image is visible, while oblique viewing by obscuring a part the pattern primitives a color separation of the image takes place.
  • FIGS. 9 and 10 show a further embodiment of the invention, in which the optically variable structure of the security element comprises a coating 70 and an embossed structure 80.
  • the coating 70 comprises an alternating sequence of three lines 72-c, 72-y, 72-m in the colors cyan (c), yellow (y) and magenta (m).
  • Several of the yellow lines 72-y contain a modulation 74, which is designed in particular in the form of a modulation of the line widths or an interruption of the lines.
  • the outline formed by the modulations 74 gives an observer at a viewing distance of about 30 cm to 50 cm information in the form of an alphanumeric character, in the embodiment in the form of the letter "A".
  • the lines 72-c, 72-y, 72-m in Fig. 9 not shown in color, but only in black and white, the individual lines are shown spaced from each other for better distinctness.
  • the lines 72-c, 72-y, 72-m may be directly adjacent to one another, as in the cross section of FIG Fig. 10 along the line XX the Fig. 9 shown, or may be arranged with a small, invisible to the naked eye distance.
  • the lines 72-c, 72-y, 72-m thus form linear, arranged in the form of a line grid basic elements of the coating 70th
  • the embossing structure 80 consists of a plurality of line-shaped recesses 82, which are aligned with the lines 72-c, 72-y, 72-m of the coating 70 and which, based on the surface of the security element, have a depth of 10 ⁇ m to 250 ⁇ m ,
  • the line-shaped recesses 82 have two opposite flanks 84 and 86, which are parallel to the lines 72-c, 72-y, 72-m.
  • each embossing element 82 is a part of the line 72-m in the color magenta and on the opposite edge 86 is a part of the line 72-c in the color cyan , In the middle, at the lowest point of the depression 82, is a part of the line 72-y in the color yellow.
  • both inside and outside of the recesses 82 all three lines 72-c, 72-y, 72-m are visible. If an observer from the direction 90 looks obliquely onto the optically variable structure, he sees in the area of the depressions 82 only the flank 86 and the line 72-c of the color cyan arranged thereon. If, on the other hand, he looks obliquely from the opposite direction 94 onto the optically variable structure, he sees in the region of the depressions 82 only the flank 84 and the line 72-m of the color magenta arranged thereon. The viewer thus tilts the security element with the optically variable structure from the direction 90 to the direction 94, it sees in the area of the embossing structures 82 alternately only the cyan flanks, all three colors and only the magenta flanks.
  • embossing elements 82 gives the viewer a second information in the form of an alphanumeric character, in the embodiment in the form of the letter "V".
  • FIGS. 4 to 10 shown embodiments may advantageously have additional information not shown, which arises by varying the coating, in particular by a variation of the shape, color or the arrangement of the coating, and / or by varying the embossed structure, in particular by a variation of the shape of the size, the height or the arrangement of the embossing elements arises.
  • the coating has been combined with the indentations of an embossing structure which is provided with a suitable embossing tool, such as the one shown in FIG Fig. 3 shown embossing plate 130, was embossed into the first major surface of the security element.
  • a suitable embossing tool such as the one shown in FIG Fig. 3 shown embossing plate 130.
  • This embossing can be designed both as a blind embossing and as an ink-bearing embossing.
  • the recesses of the first major surface are created by embossing bumps on the second opposing major surface of the carrier, as now with reference to FIGS FIGS. 11 and 12 explained.
  • FIGS. 11 and 12 each show schematically a cross section through a banknote substrate 100 having a first major surface 102, which is shown in the figures as the underside of the banknote, and with an opposing second major surface 104, which is shown in the figures as the top of the banknote.
  • a plurality of elevations 106 is embossed, wherein the embossing can be embodied both as a blind embossing and as an ink-carrying embossing.
  • the elevations 106 of the second major surface 104 may in particular be combined with a coating 108 present on the second main surface 104 and form together with this an optically variable structure 110, in which the coating 108 and the elevations 106 cooperate such that at least portions of the Coating 108 are completely visible when viewed perpendicularly 112, but covered in oblique view 114, so that the second main surface 104 shows a different visual impression from different viewing directions. Further details on the possible designs and advantages of such a combination of coating 108 and elevations 106 can be found in the document WO 2006/018232 are removed, the disclosure of which is included in the present description.
  • the back deformation of the substrate 100 when embossing the protrusions 106 is only a concomitant of the embossing technique used, which may indeed serve as another authenticity feature due to their haptic detectability, but is not related to the optically variable structure 106,108 the front.
  • the indentations 122 formed in the embossment of the protrusions 106 on the opposing first major surface 102 of the substrate are used to produce an optically variable security element without the need for a separate embossing process for the first major surface 102.
  • the optically variable structure 120 present on the first major surface 102 includes, besides the depressions 122, a coating formed from a plurality of linear or non-linear pattern primitives 124 disposed on the flanks of the depressions 122 and cooperating with the depressions 122 Viewing angle-dependent appearance of the optically variable structure 120 produce.
  • at least partial regions of the coating are completely visible when viewed perpendicularly 126 and are concealed under oblique viewing 128, as already explained above.
  • the recesses 122 and the pattern base elements 124 apply to the FIGS. 2 to 10 made statements accordingly.
  • the embossing of the second main surface 104 and the type and thickness of the coating are matched to one another.
  • the embossing of the elevations 106 of the second main surface 104 is carried out such that depressions 122 with a depth of 10 ⁇ m to 250 ⁇ m, preferably of 30 ⁇ m to 120 ⁇ m, are formed on the first main surface 102.
  • the non-linear elevations 106 blind embossed as knob-shaped elevations, and the pattern base elements 124 of the coating of the first main surface 102 set in FIGS. 7 and 8 described predefined color image motif, which, in cooperation with the depressions 122 corresponding to the elevations 106, generates a viewing angle-dependent visual impression on the banknote backside.
  • the optically variable structure 120 of the first main area 102 may also be combined with an optically variable structure 110 present on the second main area 104 with the elevations 106 and the coating 108.
  • the optically variable structures 110, 120 of the front and rear sides can be independent of one another, in particular in the case of opaque substrates, or, in particular in the case of transparent substrates, can also be matched to one another and, for example, show complementary information to one another in review.
  • FIGS. 1 to 12 shown security elements especially when using a translucent or transparent substrate can also be arranged with advantage in the region of a through opening of a data carrier.
  • a security element according to the invention in the form of a substantially transparent film strip to cover a through hole can be used in a banknote.
  • a "transparent” material is understood as meaning a material which absorbs incident electromagnetic radiation at least in the visible wavelength range from about 380 nm to about 780 nm passes completely.
  • the transmittance T 1, where T is defined as the quotient of the radiant power L transmitted through the material and the radiant power L 0 irradiated onto the substrate.
  • a "translucent”, “translucent” or “semitransparent” material has a transmittance T greater than 0 and less than 1, ie 0 ⁇ T ⁇ 1.
  • the subjective perception of a transparent, translucent, or opaque material by a viewer may in part differ materially from the exact definition given above for transparent, translucent, or opaque material.
  • a viewer may still perceive a material (security element) as transparent even if the transmittance of the material (security element) exceeds more than z. B. is 0.8, ie, less than 20% of the incident light, for example, be reflected. parent true, if the transmittance of the material (security element) more than z. B. is 0.8, ie, less than 20% of the incident light, for example, be reflected.

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

Claims (15)

  1. Elément de sécurité avec un support avec une première et une deuxième surface principale opposées et avec une structure à variation optique présente sur la première surface, qui comporte une structure gaufrée et un revêtement, la structure gaufrée et le revêtement étant combinés de telle sorte qu'au moins des parties de zone du revêtement sont complètement visibles en observation perpendiculaire, mais sont masquées en observation inclinée, la structure gaufrée étant constituée sous la forme de cavités dans la première surface principale du support et au moins des parties de zone du revêtement étant disposées dans les cavités, caractérisé en ce que les cavités de la première surface principale sont produites par gaufrage de la première surface principale du support.
  2. Elément de sécurité selon la revendication 1, caractérisé en ce que les cavités sont constituées au moins en partie sous la forme de lignes et de préférence sous la forme d'un réseau de lignes.
  3. Elément de sécurité selon la revendication 1 ou 2, caractérisé en ce que les cavités ne sont pas constituées au moins en partie en forme de lignes, sont notamment constituées en forme d'une section sphérique, d'un tétraèdre, d'une pyramide tronquée, d'un tronc de cône, d'une section cylindrique, d'un tore, d'un ovale, d'une goutte ou d'une pyramide.
  4. Elément de sécurité selon au moins l'une quelconque des revendications 1 à 3, caractérisé en ce que les cavités sont disposées sous la forme d'un réseau, de préférence d'un réseau avec fréquence de lieu constante et/ou en ce que les cavités comportent une profondeur de 10 µm à 250 µm, de préférence de 30 µm à 120 µm, de façon particulièrement préférée de 35 µm à 80 µm.
  5. Elément de sécurité selon au moins l'une quelconque des revendications 1 à 4, caractérisé en ce que le revêtement est formé pour l'essentiel d'éléments de fond en forme de lignes, qui sont disposés de préférence sous la forme d'un réseau de lignes, le revêtement étant de préférence une structure de réseau sur toute la surface, en forme de lignes, multicolore, qui contient une information, l'information étant composée de préférence d'une représentation positive et/ou négative sous la forme d'au moins une modulation des lignes de la structure en réseau.
  6. Elément de sécurité selon au moins l'une quelconque des revendications 1 à 4, caractérisé en ce que le revêtement est formé pour l'essentiel d'éléments de fond pas en forme de lignes, la dimension d'un élément de fond pas en forme de lignes n'étant dans aucune direction supérieure à quatre fois la dimension d'une des autres directions, les éléments de fond pas en forme de lignes comportant de préférence des formes profilées rondes, ovales, limitées polygonalement ou définies par un symbole, un modèle géométrique ou un signe alphanumérique.
  7. Elément de sécurité selon la revendication 6, caractérisé en ce que les éléments de fond pas en forme de lignes sont disposés sous la forme d'un réseau, de préférence d'un réseau avec fréquence de lieu constante et/ou en ce que les éléments de fond pas en forme de lignes comportent une dimension de 10 µm à 500 µm, notamment de 20 µm à 250 µm.
  8. Elément de sécurité selon au moins l'une quelconque des revendications 1 à 7, caractérisé en ce que la structure gaufrée de la première surface principale est exécutée de préférence sous la forme de gaufrage à sec ou sous la forme de gaufrage chromoconducteur.
  9. Elément de sécurité selon au moins l'une quelconque des revendications 6 à 8, caractérisé en ce que les éléments de fond pas en forme de lignes sont disposés au moins en partie sur des flancs des cavités, une cavité et les éléments de fond disposés sur leurs flancs formant ensemble respectivement un élément de structure, la structure à variation optique comportant de préférence une pluralité d'éléments de structure, qui représentent en observation perpendiculaire un motif d'image multicolore dont l'impression visuelle varie en modifiant l'angle d'observation, les éléments de structure correspondant de préférence à des points d'image du motif d'image multicolore, auxquels sont affectées certaines parties de couleur d'un système de couleurs et les éléments de fond comportant de préférence des surfaces colorées dans les couleurs du système de couleurs, les tailles des surfaces colorées des éléments de fond correspondant à la partie de couleur respective des points d'image.
  10. Elément de sécurité selon l'une quelconque des revendications 1 à 9, caractérisé en ce que la structure à variation optique comporte une information complémentaire, qui se produit par variation du revêtement, notamment par une variation de la forme, de la couleur ou de la disposition du revêtement et/ou se produit par variation de la structure gaufrée, notamment par une variation de la forme de la taille, de la hauteur ou de la disposition des éléments gaufrés.
  11. Support de données avec un élément de sécurité selon l'une quelconque des revendications 1 à 10, le support de données étant de préférence un document de valeur, notamment un billet de banque.
  12. Procédé de fabrication d'un élément de sécurité pour lequel
    - un support avec des premières et deuxièmes surfaces principales opposées est préparé,
    - une structure à variation optique avec une structure gaufrée et un revêtement est produite sur la première surface principale, la structure gaufrée étant constituée sous la forme de cavités dans la première surface principale du support,
    - au moins des parties de zone du revêtement sont disposées dans les cavités, et
    - la structure gaufrée et le revêtement sont combinés de telle sorte qu'au moins des parties de zone du revêtement sont complètement visibles en observation perpendiculaire, mais sont masquées en observation inclinée, caractérisé en ce que
    - les cavités de la première surface principale sont produites par gaufrage de la première surface principale.
  13. Procédé selon la revendication 12, caractérisé en ce que le revêtement est surimprimé sur le support, est notamment produit en impression à plat, comme à peu près en impression offset, en impression en relief, comme à peu près en typographie ou en impression flexographique, en sérigraphie, en héliogravure, comme à peu près en rotogravure ou en impression en taille-douce, ou dans un procédé thermographique, comme à peu près en procédé de thermotransfert.
  14. Procédé selon la revendication 12 ou 13, caractérisé en ce que la structure gaufrée de la première surface principale est produite de préférence par un gaufrage à sec ou un gaufrage chromoconducteur.
  15. Procédé selon au moins l'une quelconque des revendications 12 à 14, caractérisé en ce que le support est d'abord muni du revêtement et est ensuite gaufré ou en ce que le support est d'abord gaufré et ensuite muni du revêtement ou en ce que le support est imprimé et muni du revêtement dans la même étape de travail.
EP09801937.5A 2009-01-05 2009-12-17 Élément de sécurité ayant une structure optique variable Active EP2385903B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009004128A DE102009004128A1 (de) 2009-01-05 2009-01-05 Sicherheitselement mit optisch variabler Struktur
PCT/EP2009/009059 WO2010075979A1 (fr) 2009-01-05 2009-12-17 Élément de sécurité à structure optiquement variable

Publications (3)

Publication Number Publication Date
EP2385903A1 EP2385903A1 (fr) 2011-11-16
EP2385903B1 true EP2385903B1 (fr) 2017-07-26
EP2385903B8 EP2385903B8 (fr) 2017-08-30

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Application Number Title Priority Date Filing Date
EP09801937.5A Active EP2385903B8 (fr) 2009-01-05 2009-12-17 Élément de sécurité ayant une structure optique variable

Country Status (5)

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EP (1) EP2385903B8 (fr)
DE (1) DE102009004128A1 (fr)
HU (1) HUE037016T2 (fr)
RU (1) RU2527184C2 (fr)
WO (1) WO2010075979A1 (fr)

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EP2554397B1 (fr) 2011-08-05 2014-02-12 ALLTEC Angewandte Laserlicht Technologie Gesellschaft mit beschränkter Haftung Structure de gaufrage
DE102011114644A1 (de) 2011-09-30 2013-04-04 Giesecke & Devrient Gmbh Sicherheitselement mit mehreren optisch variablen Strukturen und einem kinematischen Effekt
DE102011114645A1 (de) 2011-09-30 2013-04-04 Giesecke & Devrient Gmbh Sicherheitselement mit einer optisch variablen Struktur aus Mikrospiegeln
DE102011114647A1 (de) 2011-09-30 2013-04-04 Giesecke & Devrient Gmbh Sicherheitselement mit mehreren optisch variablen Strukturen
EP2594149A1 (fr) 2011-11-18 2013-05-22 Fabrica Nacional De Moneda Y Timbre - Real Casa De La Moneda Objet comportant une région de sa surface adaptée pour montrer plusieurs images
DE102013000556A1 (de) 2013-01-14 2014-07-17 Giesecke & Devrient Gmbh Reliefierter kartenförmiger Datenträger
RU2516474C1 (ru) * 2013-04-09 2014-05-20 Федеральное Государственное Унитарное Предприятие "Гознак" (Фгуп "Гознак") Слоистое изделие на бумажной или полимерной основе (варианты) и способ его изготовления
DE102013021806A1 (de) * 2013-12-20 2015-06-25 Giesecke & Devrient Gmbh Sicherheitselemente zur Darstellung zumindest einer optisch variablen Information
DE102014018512A1 (de) 2014-12-12 2016-06-16 Giesecke & Devrient Gmbh Optisch variables Sicherheitselement
JP6875400B2 (ja) 2015-12-18 2021-05-26 ビジュアル フィジクス エルエルシー 単層画像投影システム
MX367979B (es) * 2016-11-28 2019-09-12 Banco De Mexico Artículo y método de formación de estructuras embozadas sobre superficies de materiales brillantes que producen movimientos aparentes predeterminados.
DE102017011455A1 (de) 2017-12-12 2019-06-13 Giesecke+Devrient Currency Technology Gmbh An unterschiedliche Kundenwünsche anpassbares Sicherheitselement mit einer optisch variablen Struktur
DE102018007207B4 (de) * 2018-09-12 2020-10-01 Giesecke+Devrient Mobile Security Gmbh Sicherheitsdokument und Verfahren zur Herstellung eines Sicherheitsdokuments
EP4269123A1 (fr) * 2022-04-29 2023-11-01 Thales Dis France SAS Élément de sécurité à couleur variable

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EP1549505A4 (fr) * 2002-10-07 2006-04-19 Note Printing Au Ltd Dispositifs estampes a couleurs changeantes
DE102005011612A1 (de) 2004-08-13 2006-02-23 Giesecke & Devrient Gmbh Datenträger mit einer optisch variablen Struktur
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Also Published As

Publication number Publication date
RU2011132315A (ru) 2013-02-10
RU2527184C2 (ru) 2014-08-27
EP2385903A1 (fr) 2011-11-16
EP2385903B8 (fr) 2017-08-30
DE102009004128A1 (de) 2010-07-08
HUE037016T2 (hu) 2018-08-28
WO2010075979A1 (fr) 2010-07-08

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