EP3498488B1 - Procede de fabrication d'un élément de sécurité doté d'une structure optique variable - Google Patents

Procede de fabrication d'un élément de sécurité doté d'une structure optique variable Download PDF

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Publication number
EP3498488B1
EP3498488B1 EP18000956.5A EP18000956A EP3498488B1 EP 3498488 B1 EP3498488 B1 EP 3498488B1 EP 18000956 A EP18000956 A EP 18000956A EP 3498488 B1 EP3498488 B1 EP 3498488B1
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EP
European Patent Office
Prior art keywords
coating
security element
embossing
grid
embossed
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
EP18000956.5A
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German (de)
English (en)
Other versions
EP3498488A1 (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 Currency Technology GmbH
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Priority to PL18000956T priority Critical patent/PL3498488T3/pl
Publication of EP3498488A1 publication Critical patent/EP3498488A1/fr
Application granted granted Critical
Publication of EP3498488B1 publication Critical patent/EP3498488B1/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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/328—Diffraction gratings; Holograms
    • 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

Definitions

  • the invention relates to a method for producing a security element with an optically variable structure which has an embossed structure of embossed elements which is combined with a coating that contrasts with the surface of the security element in such a way that at least partial areas of the coating are visible when viewed from a first viewing angle range Viewing under a second viewing angle range, however, are at least partially covered, so that a tilting effect occurs when the security element is tilted and / or rotated about an axis.
  • Embossing forms for gravure or letterpress are used.
  • a special application are tactile structures that can be easily recognized by people with visual impairment, for example Braille or labels that are typically defined by points or line structures based on the system or quantity and thus, for example, a nomination or the value of a banknote represent.
  • Embossed structures are also used for optically variable security elements in which a grid of embossed structures, the so-called Embossing grid, clearly assigned to a grid of printed structures, the so-called background printing.
  • These security elements are known from, for example WO 2006/018232 A1 , WO 2009/013000 A2 , WO 2010/075979 A1 , WO 2013/045056 A1 , WO 2013/045055 A1 ,
  • WO 2013/045054 A1 EP 2746059 A2 and WO 2016/020066 A2 and are used not only on value or security documents, such as banknotes or identity documents, but also on packaging for higher-value products, such as pharmaceuticals, cosmetics or cigarettes.
  • the special feature of the embossed structures known from the prior art lies in the exact registration between the structures of the background print and the structures of the embossed grid. This exact registration of the two grids leads to the desired result of an optically variable appearance in which different information becomes visible by changing the viewing angle. Even slight deviations from the exact registration lead to undesirable effects, such as those from the WO 2008/049566 A2 are known.
  • an optically variable structure which consists of an imprint and an embossed structure superimposed on this imprint.
  • the entire area provided with printing and embossing is divided into sub-areas in which either the printing or the embossing can be varied uniformly for the entire surface.
  • the other part is made the same in all sub-areas, ie it has the same regularities in all sub-areas.
  • an optically variable structure which consists of a coating and an embossed structure superimposed on this coating.
  • the embossed structure has non-linear embossed elements which are combined with the coating in such a way that different information becomes visible when the viewing direction is changed.
  • the non-linear embossed elements are characterized in particular by at least three flanks, these flanks having dimensions that enable the shadowing effect according to the invention.
  • the invention is therefore based on the object of developing a generic security element in such a way that different optically variable effects can be generated using simple means in accordance with different customer requirements.
  • the technical effort involved in changing the respective optically variable effects should be as low as possible, for example in the case of strongly changing order sequences such as short runs or individualized digital printing.
  • the area occupied by the entire embossed structure on the security element is larger than the area occupied by the entire first coating on the security element, the embossed structure and the first coating at least partially overlapping in relation to the top view of the security element. If different security elements with different optically variable structures with different tilting effects are to be produced, the embossed structure remains unchanged and only the first coating is adapted to the different optically variable structures.
  • a uniform embossed grid which consists of a grid-shaped arrangement of embossed structures, is combined with different first printing grids in order to obtain a large number of different optically variable effects that can be individually adapted to customer requirements. The embossing information is therefore always the same and only the printing screen is different.
  • the area which the entire embossed structure occupies on the security element is made larger than the area which the entire first coating occupies on the security element.
  • the embossed structure and the first coating are arranged at least partially overlapping in relation to the top view of the security element. If the optically variable structure is changed, the embossed structure is not changed according to the invention and only the first coating is adapted to the changed optically variable structure.
  • the embossed structure and the first coating completely overlap in relation to the top view of the security element, the contour delimiting the first coating not touching the contour delimiting the embossed structure.
  • the first coating is thus arranged completely within the embossed structure and does not touch the outer boundary of the embossed structure at any point.
  • the embossed elements consist of a plurality of embossed structures arranged in a grid.
  • the embossed Structures are particularly preferably designed as point-like and / or linear structures, with linear structures being able to be linear, undulating or curved as desired.
  • Point-like structures can, for example, have a round, triangular, square, rectangular or any polygonal base area, such as those from WO 2006/018232 A1 or WO 2013/045056 A1 are known.
  • the first coating can also consist of a plurality of first printed elements arranged in a grid, the grid of the printed elements being adapted to the grid of the embossed structures.
  • the printed elements are particularly preferably designed as point and / or line-shaped structures in accordance with the embossed structures described in the previous paragraph.
  • Line-shaped structures can therefore be designed, for example, as straight, wavy or curved in any way, point-shaped structures, for example, have a round, triangular, square, rectangular or any polygonal base area.
  • a grid is a regular, repetitive arrangement of these embossed or printed structures or elements. Such an arrangement is, for example, a sequence of lines aligned parallel to one another at a certain distance from one another.
  • the individual lines can also be formed from a large number of points that are spaced regularly, the same or irregularly from one another. Instead of a large number of points, a large number of points, line segments, triangular, square or polygonal and / or arbitrarily shaped elements or a mixture of these elements is also possible.
  • Mixed forms can also be created by combining images in different grid types and / or resolutions in order to obtain a further optically variable effect. Thus, an image that appears uniform to the observer when viewed vertically can appear different in color in partial areas when it is tilted or rotated.
  • the security element has a second coating, which preferably consists of a plurality of second printed elements arranged in a grid, which surrounds the first coating and wherein the grid of the printed elements is not adapted to the grid of the embossed structures.
  • the printing screen is thus divided into at least two different areas, a first printing screen which, together with the embossed screen, produces an optically variable effect, and a second printing screen which, together with the embossed screen, does not produce an optically variable effect.
  • the screen width of the embossing is 30 lines per cm, which corresponds to a line width of 300 ⁇ m, and the screen width of the second printing screen is 80 lines per cm.
  • the first print raster preferably has raster widths of 10 lines per cm to 80 lines per cm, particularly preferably 20 lines per cm to 40 lines per cm.
  • the second coating can also consist of a colored surface, for example a single or multi-colored print. This imprint surrounds the first coating and can also be configured to overlap it and thereby protrude into the first coating.
  • the colored surface can also continue into the areas surrounding the embossed structure.
  • the second coating does not have to be limited to the area of the embossed structure.
  • the embodiment according to the invention makes it possible particularly preferably to use an embossing form with an embossing grid, the area of which in the lateral direction is larger than the area in which the different optically variable effects are to be arranged, around different printing grids, which can be different in appearance and dimensions to enable within the embossing grid.
  • the printing grid is designed in such a way that no optically variable effect is generated.
  • the design in the desired embossed area is provided with the background grid adapted to the embossed grid and provided on the outside with a finer or significantly coarser grid than the embossed grid, so that the outer area does not have any discernible optically variable effect together with the embossed structure.
  • the production of the security element according to the invention is particularly preferably carried out with a predetermined, uniform embossing grid or embossing tool, and a first printing grid or printing tool that is matched to the embossing grid and can be individually adapted to customer requirements.
  • the printing grids preferably consist of individual grid elements, each of which has different colors, preferably one to twelve different colors and particularly preferably one to four different colors.
  • the extent of the embossing structure corresponds to the extent of the embossing tool.
  • the embossed structure covers the entire surface of the embossing tool, which forms the embossed structure in the substrate of the security element.
  • Advantages of the invention are in particular a cost saving through only one uniform embossing tool, since many different optically variable designs can be realized with the one embossing tool. This results in short set-up times and a high degree of flexibility, low reject rates and a large area of application.
  • An optically variable structure within the meaning of this invention is a structure whose visual appearance changes when the element is tilted or rotated. For example, when the optically variable structure 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.
  • 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 forgery-prone papers, such as passports and other identification documents, as well as 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, outer packaging, banderoles and the like.
  • the simplified designation of value document includes all of the above materials, documents and product security means.
  • register the positional accuracy of the printing screen and embossing screen or other elements with respect to one another on the front and / or back of a substrate.
  • register the positional accuracy of the printing screen and embossing screen or other elements with respect to one another on the front and / or back of a substrate.
  • register the positional accuracy of the printing screen and embossing screen or other elements with respect to one another on the front and / or back of a substrate.
  • register defines register as the accuracy in printing technology with which the intended reproduction quality of the details to be reproduced is achieved or maintained.
  • Individual items, for example personalized one-time products can also have a slightly higher register inaccuracy, since the focus here is on the one-off effect or the uniqueness of the product.
  • the optically variable structure particularly preferably shows information in the form of a pattern designed and visually perceptible representation. This can form, for example, an alphanumeric string of digits and / or letters, a graphic image, 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-colored substrate.
  • a negative motif is, for example, an area applied to the light-colored substrate in a dark color, which has an unprinted area in the form of a letter within the area.
  • the Fig. 1 shows a plan view of an embodiment of an embossed grid, which consists of a grid of regularly arranged embossed structures 1, which have a circular base.
  • the embossing grid was produced with an embossing die which, depending on the substrate to be embossed, has an embossing grid with slightly reduced embossing structures. If the stamp has raised embossed structures, there are recessed embossed structures in the substrate and vice versa.
  • the embossed structures are preferably designed as hemispherical structures. Any other shapes of base areas are of course possible, for example polygons with pyramid-shaped embossed structures or also elongated, line-like structures.
  • Fig. 2 shows a top view of a first embodiment of a combination of the embossing grid according to the invention Fig. 1 with two print grids Fig. 2a and Figure 2b .
  • Fig. 2a a first printing raster, the outline of which has the overall shape of a triangle.
  • the individual grid elements 2, 3, 4 have a circular base area corresponding to the embossed grid, with each individual grid element of the embossed grid 1 having three grid elements 2, 3 and 4 are assigned, which for example have different colors, 2 is red, 3 is green and 4 is blue, which is shown in the figures by different hatching.
  • the grid elements 2, 3 and 4 thus lie on different areas of the flank of the grid element of the embossed grid 1, so that a viewer sees different colors from different viewing directions. This results in an optically variable effect for a viewer in the form of a color shift effect that is dependent on the viewing angle.
  • Figure 2b shows a second printing raster which is designed in such a way that it comprises the first printing raster Fig. 2a surrounds and has a recess in the form of a triangle, the dimensions of which are based on the outline Fig. 2a is equivalent to.
  • This print raster also consists of three different raster elements 5, 6 and 7 which, like raster elements 2, 3 and 4, have different colors.
  • the grid elements 5, 6 and 7 are not assigned to any grid element of the embossed grid 1, but are distributed as desired. There is thus no optically variable effect due to the raster elements 5, 6 and 7, but a mixed color independent of the viewing angle.
  • Figure 2c shows the combination of the first print raster Fig. 2a and the second print screen Figure 2b with the embossing grid Fig. 1 . Only in the triangular area in which the grid elements 2, 3 and 4 are arranged does an optically variable effect arise for a viewer in the form of a color shift effect dependent on the viewing angle, outside this area a mixed color independent of the viewing angle.
  • FIG. 3 The embodiment shown corresponds to the embodiment from FIG Fig. 2 , being in contrast to the embodiment from Fig. 2 the first Print grid according to Fig. 3a overall has an outline in the form of a rectangle.
  • Figure 3b a second printing grid designed so that it is the first printing grid Fig. 3a surrounds and has a recess in the form of a rectangle, the dimensions of which are based on the outline Fig. 3a is equivalent to.
  • Figure 3c shows the combination of the first print raster Fig. 3a and the second print screen Figure 3b with the embossing grid Fig. 1 .

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Credit Cards Or The Like (AREA)
  • Printing Methods (AREA)

Claims (2)

  1. Procédé de fabrication d'un élément de sécurité doté d'une structure optiquement variable, qui comprend une structure de gaufrage composée d'éléments de gaufrage (1), qui est combinée avec un premier revêtement contrastant par rapport à la surface de l'élément de sécurité de telle sorte qu'au moins des zones partielles du revêtement sont visibles lors d'une observation à partir d'une première plage d'angle d'observation, mais sont au moins partiellement masquées lors d'une observation dans une deuxième plage d'angle d'observation, de telle sorte qu'un effet de basculement est produit lors d'un basculement et/ou d'une rotation de l'élément de sécurité autour d'un axe, la surface occupée par l'ensemble de la structure de gaufrage sur l'élément de sécurité étant configurée supérieure à la surface occupée par l'ensemble du premier revêtement sur l'élément de sécurité, la structure de gaufrage et le premier revêtement étant agencés en chevauchement au moins partiel par rapport à la vue de dessus sur l'élément de sécurité, la structure de gaufrage n'étant pas modifiée lors d'une modification de la structure optiquement variable et le premier revêtement étant adapté à la structure optiquement variable modifiée, les éléments de gaufrage (1) étant constitués par une pluralité de structures gaufrées agencées dans une trame et le premier revêtement étant constitué par une pluralité de premiers éléments imprimés (2, 3, 4) agencés dans une trame, la trame des éléments imprimés (2, 3, 4) étant adaptée à la trame des structures gaufrées, l'élément de sécurité comprenant un deuxième revêtement, qui est constitué par une pluralité de deuxièmes éléments imprimés (5, 6, 7) agencés dans une trame, caractérisé en ce que le deuxième revêtement entoure de manière adjacente le premier revêtement et la trame des éléments imprimés (5, 6, 7) n'est pas adaptée à la trame des structures gaufrées.
  2. Procédé selon la revendication 1, caractérisé en ce que la structure de gaufrage et le premier revêtement sont agencées en chevauchement total par rapport à la vue de dessus sur l'élément de sécurité, le pourtour qui délimite le premier revêtement n'étant pas en contact avec le pourtour qui délimite la structure de gaufrage.
EP18000956.5A 2017-12-12 2018-12-10 Procede de fabrication d'un élément de sécurité doté d'une structure optique variable Active EP3498488B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL18000956T PL3498488T3 (pl) 2017-12-12 2018-12-10 Sposób wytwarzania elementu zabezpieczającego z optycznie zmienną strukturą

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017011455.2A DE102017011455A1 (de) 2017-12-12 2017-12-12 An unterschiedliche Kundenwünsche anpassbares Sicherheitselement mit einer optisch variablen Struktur

Publications (2)

Publication Number Publication Date
EP3498488A1 EP3498488A1 (fr) 2019-06-19
EP3498488B1 true EP3498488B1 (fr) 2021-11-24

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EP18000956.5A Active EP3498488B1 (fr) 2017-12-12 2018-12-10 Procede de fabrication d'un élément de sécurité doté d'une structure optique variable

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DE (1) DE102017011455A1 (fr)
PL (1) PL3498488T3 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10044465A1 (de) 2000-09-08 2002-03-21 Giesecke & Devrient Gmbh Datenträger mit einem optisch variablen Element
DE102005011612A1 (de) 2004-08-13 2006-02-23 Giesecke & Devrient Gmbh Datenträger mit einer optisch variablen Struktur
DE102006050290A1 (de) * 2006-10-23 2008-04-30 Giesecke & Devrient Gmbh Sicherheitselement mit einer optisch variablen Struktur
DE102007035161A1 (de) * 2007-07-25 2009-01-29 Giesecke & Devrient Gmbh Sicherheitselement mit mehreren optisch variablen Strukturen
DE102009004128A1 (de) 2009-01-05 2010-07-08 Giesecke & Devrient Gmbh Sicherheitselement mit optisch variabler Struktur
DE102011114647A1 (de) 2011-09-30 2013-04-04 Giesecke & Devrient Gmbh Sicherheitselement mit mehreren optisch variablen Strukturen
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
DE102012025089A1 (de) 2012-12-20 2014-06-26 Giesecke & Devrient Gmbh Sicherheitselement mit Kippeffekt
AU2015287440B2 (en) * 2014-07-07 2020-04-23 Security Fibres Uk Limited Improvements in and relating to security documents
DE102014018512A1 (de) 2014-12-12 2016-06-16 Giesecke & Devrient Gmbh Optisch variables Sicherheitselement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102017011455A1 (de) 2019-06-13
EP3498488A1 (fr) 2019-06-19
PL3498488T3 (pl) 2022-02-28

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