EP4563367A1 - Élément de sécurité avec image de ligne de combustion et image de diffraction - Google Patents

Élément de sécurité avec image de ligne de combustion et image de diffraction Download PDF

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Publication number
EP4563367A1
EP4563367A1 EP23213712.5A EP23213712A EP4563367A1 EP 4563367 A1 EP4563367 A1 EP 4563367A1 EP 23213712 A EP23213712 A EP 23213712A EP 4563367 A1 EP4563367 A1 EP 4563367A1
Authority
EP
European Patent Office
Prior art keywords
structures
region
security element
light
security
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.)
Pending
Application number
EP23213712.5A
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German (de)
English (en)
Inventor
Philipp Nothdurft
Anita FUCHSBAUER
Stephan Trassl
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.)
Hueck Folien GmbH
Original Assignee
Hueck Folien GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hueck Folien GmbH filed Critical Hueck Folien GmbH
Priority to EP23213712.5A priority Critical patent/EP4563367A1/fr
Publication of EP4563367A1 publication Critical patent/EP4563367A1/fr
Pending legal-status Critical Current

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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
    • B42D25/324—Reliefs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows

Definitions

  • the invention relates to a security element, in particular for securities, security papers, or security objects, wherein the security element has a first side and a second side and comprises a carrier layer and a security feature formed by structures.
  • the invention also relates to a security or security paper, in particular a banknote.
  • Security elements of the above-mentioned type are usually used to increase the security against counterfeiting of securities, security papers or security items, such as banknotes, ID cards, credit cards, debit cards, tickets, etc.
  • the object of the present invention is to create a security element with increased protection against counterfeiting.
  • a security element of the type mentioned at the outset in that a first region is formed with light-refracting structures, wherein the light-refracting structures are designed to refract incident light and, in particular, to generate a focal line image in transmission or transmitted light on a viewing plane, and in that a second region is formed with diffractive structures, wherein the diffractive structures are designed to diffract incident light and, in particular, to generate a diffraction image when the security element is viewed from one of the two sides in transmission.
  • Refractive structures are structures that focus incident light, for example daylight or laser beams, in such a way that so-called focal line images, focal lines or focal surfaces are created or are perceptible to an observer, particularly in transmission.
  • the focal line image or the diffraction image can also be perceptible to an observer if the observer is not looking directly through the security element. Rather, the focal line image or the A diffraction pattern can be generated or projected onto a plane, surface, or wall behind the security element.
  • the viewer's retina can also be a viewing plane.
  • the diffractive structures are preferably diffractive optical elements (abbreviated to "DOE").
  • DOEs are optical elements for shaping a light beam.
  • the underlying physical principle is diffraction at an optical grating.
  • DOEs cause phase modulation due to different optical path lengths of the partial beams of a light beam, generating interference patterns.
  • the amplitude can be modulated through constructive and destructive superposition.
  • DOEs can perform two tasks: they can shape a light or laser beam (beam shaping) or split a light or laser beam into several partial beams (beam splitting).
  • the microstructure in the DOE can shape the light or laser beam through the refractive index or through height modulation.
  • both refractive structures and diffractive structures When illuminated, for example, with a point light source or a laser, both refractive structures and diffractive structures generate specific images encoded within the structures, which are particularly perceptible when illuminated in transmission. This occurs either when viewed through the security element and/or when viewed from the side of the surface or projection surface behind the security element.
  • the incident light or laser beam is altered by refraction or diffraction in such a way that a focal line image or a diffraction image is generated on a perception or display level.
  • the respective generated image or images are not recognizable in the encoded structures.
  • the combination of light-refracting structures and diffractive structures in a security element significantly increases the counterfeit security of security elements because two different physical effects are combined to create an image. This allows for a high degree of design freedom, making imitation difficult.
  • the image(s) created by the inventive design are particularly memorable for a viewer, especially for a layperson, so that counterfeits can be reliably identified as such even without technical aids and without specific training.
  • a further advantage of the invention is that the combination of the two structures contributes to increasing the complexity of the overall image or impression perceived in transmission, which in turn has a positive effect on counterfeit security. This is particularly true when the focal line image and the diffraction image are coordinated with each other or when the focal line image and the diffraction image complement each other.
  • the focal line image is perceptible on or in a first surface, and if the diffraction image is perceptible on or in a second surface located above or below the first surface.
  • the effect perceived by a viewer, particularly in transmission or transmitted light or even through viewing, is always the same, regardless of whether the first side or the second side of the security element is viewed.
  • the first and second surfaces can each be a plane, i.e., a flat or two-dimensional surface. However, the first and second surfaces can also be three-dimensional. Even if the focal line image and the diffraction image are each perceptible in different areas, i.e., a different depth of the respective images is perceptible to an observer, it is still possible that the first structures and second structures are actually arranged or formed in the same layer.
  • the first surface or plane can be the focal surface or focal plane of the focal line image.
  • the diffractive structures and the DOEs formed by them can be perceived over a wider or wider range. This means that they have an appearance that creates or conveys the impression that the diffraction pattern extends across multiple perception surfaces, perception planes, or display surfaces or display planes. This is comparable, for example, to a hologram.
  • An overall image can thus be composed of one or more focal line images and one or more diffraction images. It is also possible for several partial images to appear as focal line images and several partial images as diffraction images when viewed together as an overall image.
  • the focal line image and the diffraction image are perceptible in different areas or at different depths, and if an overall image or motif is created from this, the security against counterfeiting can be further increased. Simulating such different depth effects in combination with an overall image created by refractive and diffractive structures is particularly difficult.
  • the focal line image and/or the diffraction image may represent at least one portrait, a landscape, a building, an animal, a pattern, an abstract geometric character, a logo, an alphanumeric character, an icon, a symbol, a code, and/or a sequence of characters. This has the advantage that such particularly memorable representations further contribute to increasing security against counterfeiting.
  • first region and the second region are formed in the same layer, or that the first region and the second region are formed in different layers. It is also conceivable that the first region and/or the second region extend over several layers, i.e., have a multi-layer structure.
  • first region and the second region are formed in the same layer, it may still create the impression that the focal line image and the diffraction image are formed in different areas or with different depths.
  • first region and the second region are formed in different layers, it may still be the case that the impression is created that the focal line image and the diffraction image are formed in the same area, i.e. with the same depth.
  • the second area partially or completely covers the first area.
  • the first side may be a visible side of the security element. It may also be the case that, when viewing the first side of the security element, the first area partially or completely covers the second area.
  • the diffractive structures of the second region are formed at least in regions on and/or in the light-refracting structures of the first region.
  • Refractive structures are comparatively larger than diffractive structures or DOEs, so the refractive structures can be fabricated first, and then the diffractive structures can be applied and/or incorporated onto or into them. The two areas overlap each other partially or completely. This allows for the creation of arrangements that are particularly difficult to counterfeit.
  • the security element when illuminated in transmitted light or transmitted light, the light-diffractive structures of the second region and the light-refracting structures of the first region are arranged in a nested manner. This allows for particularly difficult-to-counterfeit arrangements.
  • the first region and the second region are arranged next to one another.
  • the first region and the second region can be arranged directly or immediately next to one another and adjacent, or they can be spaced apart from one another by additional regions.
  • further structures are formed, which are perceptible in supervision or in reflection, whereby the further structures achromatic and/or reflective structures, such as micromirrors, and/or refractive structures, such as microlenses, and/or further diffractive structures, such as holograms.
  • the structures are introduced directly into the carrier layer, in particular embossed by means of a molding device, or if the structures are introduced into a further layer, in particular into an embossing lacquer layer, in particular embossed by means of a molding device.
  • further structures are formed, whereby the further structures reflect a motif into different spatial areas, so that a moving image is created for the viewer when a light source moves accordingly, when the security element is tilted and/or when the viewing angle changes.
  • a further image formed by additional structures can be provided in an optical effect layer in the special design of a printed image.
  • a partially opaque printing ink such as white, and/or a semi-transparent metallization can be used.
  • a matte and/or glossy gloss level can be achieved.
  • the optical effect layer in which the further image is formed is designed as a thin-film element and has at least one absorber layer and at least one spacer layer, or wherein the optical effect layer contains color-shifting pigments, in particular interference pigments, or liquid crystal pigments, or wherein the optical effect layer has metallic pigments and/or magnetic pigments and/or color pigments and/or dyes.
  • the optical effect layer is printed and/or vapor-deposited onto the first structures.
  • the further image in particular the optical effect layer in which the further image is formed, can be a metallic effect paint and/or a metallic effect varnish and/or a Metallic effect ink and/or a metallic material, in particular selected from the group consisting of silver, copper, aluminum, gold, platinum, niobium, tin, or nickel, titanium, vanadium, chromium, cobalt and palladium or alloys of these materials, in particular cobalt-nickel alloys.
  • the optical effect layer in which the further image is formed has a color-shift effect and contains a color-shifting thin-film element or color-shifting pigments, in particular interference pigments, or liquid crystal pigments.
  • the optical effect layer can have at least one layer that enhances the color-shift effect on a side facing away from the visible side of the security element, wherein the layer that enhances the color-shift effect is in particular a layer of dark color and/or a layer of metal oxides, such as substoichiometric aluminum oxide.
  • the layer that enhances the color-shift effect can be applied to a liquid crystal layer or a layer of color-shifting pigments, such that the layer of color-shifting pigments or the liquid crystal layer is arranged between the layer that enhances the color-shift effect and the carrier layer.
  • the layer that enhances the color-shift effect can also be arranged between the carrier layer and the layer of color-shifting pigments or the at least one liquid crystal layer.
  • a carrier layer it is also possible for a carrier layer to be arranged between the layer that enhances the color-shift effect and the layer of color-shifting pigments or the liquid crystal layer.
  • the optical effect layer may comprise at least one liquid crystal layer, in particular a cholesteric liquid crystal layer.
  • the optical effect layer can be formed as an optically non-linear layer or as an optically non-linear layer and/or as a layer containing fluorescent pigments and/or fluorescent substances.
  • Optically non-linear layers or layers or the materials forming this layer are also referred to as IR upconverters or UV downconverters. These can be materials that exhibit a visible color under the influence of electromagnetic radiation outside the visible wavelength range of light. Such materials can be excited to emit visible light under these conditions, for example upon irradiation with infrared (IR) ( ⁇ > 780 nm) and/or ultraviolet (UV) light ( ⁇ ⁇ 380 nm). Furthermore, it is possible that the optical effect layer contains photoluminescent pigments and/or photoluminescent substances which exhibit emission in the IR range when excited by electromagnetic radiation.
  • the described first or second structures can be introduced directly into the carrier layer or into a further layer, in particular an embossing lacquer layer, in particular by embossing them using a molding device.
  • the first structures as well as the second structures can be embossed directly into the carrier layer. For example, by heating the carrier layer and embossing the structures using an embossing tool, such as an embossing roller.
  • an embossing tool such as an embossing roller.
  • Another alternative possibility would be to provide a separate further layer to accommodate the structures.
  • the further layer can be applied directly to a carrier layer.
  • the further layer can be formed from an embossing lacquer that is shaped to match the arrangement of the structures. This can in turn be done using a molding device or a molding element in an embossing process.
  • the arrangement or application of the optical effect layer onto the structures or the metal layers and/or metallic effect layers can be achieved, for example, by a printing process and/or a vapor deposition process or by several of these processes.
  • the materials or additives of the reflective layer described below could also form a component or a layer of the optical effect layer. These can, in particular, be printed or vapor-deposited, thus forming a separate layer of the optical effect layer.
  • the optical effect layer is designed as a thin-film element and has at least one absorber layer and at least one spacer layer.
  • the at least one absorber layer may comprise at least one metallic material, in particular selected from the group of nickel, titanium, vanadium, chromium, cobalt, palladium, iron, tungsten, molybdenum, niobium, aluminum, silver, copper and/or alloys of these materials, or may be made of at least one of these materials.
  • the optical effect layer designed as a thin-film element further comprises at least one reflection layer and/or a second absorber layer, wherein the at least one spacer layer is arranged between the at least one first absorber layer and the at least one reflection layer and/or the at least one second absorber layer.
  • the reflective layer can be applied or arranged on structures, and in particular, can be printed and/or vapor-deposited onto them. It is also possible to reverse this order in the optical effect layer, so that the absorber layer is arranged on the structures, followed by the spacer layer and the reflective layer. Thus, the arrangement would be in the order structures – absorber layer – spacer layer – reflective layer. However, an additional absorber layer can also be provided instead of the aforementioned reflective layer.
  • the at least one reflective layer can comprise at least one metallic material, in particular selected from the group consisting of silver, copper, aluminum, gold, platinum, niobium, tin, or nickel, titanium, vanadium, chromium, cobalt and palladium or alloys of these materials, in particular cobalt-nickel alloys or at least one high-index dielectric material with a refractive index greater than 1.65, in particular selected from the group consisting of zinc sulfide (ZnS), zinc oxide (ZnO), titanium dioxide (TiO2), carbon (C), indium oxide (In2O3), indium tin oxide (ITO), tantalum pentoxide (Ta2O5), cerium oxide (CeO2), yttrium oxide (Y2O3), europium oxide (Eu2O3), iron oxides such as iron(II,III) oxide (Fe3O4) and iron(III) oxide (Fe2O3), hafnium nitride (HfN), ha
  • the at least one spacer layer can be a low-refractive dielectric material with a refractive index less than or equal to 1.65, in particular selected from the group aluminum oxide (Al2O3), metal fluorides, for example magnesium fluoride (MgF2), aluminum fluoride (AlF3), cerium fluoride (CeF3), sodium aluminum fluorides (e.g.
  • Na3AlF6 or Na5Al3F14 silicon oxide (SiOx), silicon dioxide (SiO2), neodymium fluoride (NdF3), lanthanum fluoride (LaF3), samarium fluoride (SmF3), barium fluoride (BaF2), calcium fluoride (CaF2), lithium fluoride (LiF), low-refractive organic monomers and/or low-refractive organic polymers or at least one high-refractive dielectric material with a Refractive index greater than 1.65, in particular selected from the group zinc sulfide (ZnS), zinc oxide (ZnO), titanium dioxide (TiO2), carbon (C), indium oxide (In2O3), indium tin oxide (ITO), tantalum pentoxide (Ta2O5), cerium oxide (CeO2), yttrium oxide (Y2O3), europium oxide (Eu2O3), iron oxides such as iron(II
  • the optical effect layer is a partial layer or comprises a partial layer, wherein the motif is represented by the partial layer.
  • the security element comprises a carrier layer, in particular a carrier film, made of a plastic, wherein in particular the plastic can be formed from a translucent and/or thermoplastic plastic.
  • the carrier layer can preferably contain at least one of the materials from the group polyimide (PI), polypropylene (PP), monoaxially oriented polypropylene (MOPP), biaxially oriented polypropylene (BOPP), polyethylene (PE), polyphenylene sulfide (PPS), polyetheretherketone (PEEK), polyetherketone (PEK), polyethyleneimide (PEI), polysulfone (PSU), polyaryletherketone (PAEK), polyethylene naphthalate (PEN), liquid crystalline polymers (LCP), polyester, polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyamide (PA), polycarbonate (PC), cycloolefin copolymers (COC), polyoxymethylene (POM), acrylonitrile butadiene st
  • the security element may have additional layers, which additional layers may in particular be protective varnishes, heat-sealing varnishes, adhesives, primers and/or Films.
  • protective varnishes can protect the entire layer and/or layer structure from mechanical damage such as scratches, scoring, or the like.
  • a protective layer can be provided on one or both sides.
  • a flat design of the security element can also be achieved using a protective layer.
  • the object of the invention is also achieved by a security document or security paper which comprises a security element according to the above description or according to one of the claims.
  • the combination of light-refracting structures and diffractive structures in a security or security paper significantly increases the forgery security of securities or security papers because two different physical effects are combined to create an image. This allows a high degree of design freedom, making imitation difficult.
  • the image(s) created by the inventive design are particularly memorable for a viewer, and in particular for a layperson, so that counterfeits can be reliably identified as such even without technical aids and without specific training.
  • the layer structure depends on the type of attachment of the security element to a security object, since the side of the security element to be viewed after attachment is crucial.
  • the visible side can be viewed from above, as shown in the figures, but it is also possible to view the security element from below, e.g., through a support.
  • a layer is applied to something
  • the phrase “a layer is applied to something” should be understood to mean that the layer can be applied directly, or that one or more intermediate layers can be located between the applied layer and the material to which the layer is applied. It should also be noted that one or more intermediate layers can be arranged between the layers described in this document. It is therefore not absolutely necessary for the described layers to contact one another.
  • the term "layer” in this document should be understood to mean that a layer can also be composed of several sublayers.
  • Fig. 1 to 4 Each shows sectional views of various embodiments of security elements 1.
  • the representations of the layers are highly simplified or roughly schematic. Furthermore, the examples shown are representative of a multitude of other possible layer structures.
  • the security element 1 for securities, security papers, or security articles, which has a first side 2 and a second side 3. The two sides are the respective outer sides of the security element 1.
  • the security element 1 comprises a carrier layer 4 or a carrier film.
  • This carrier layer 4 can be a plastic film, for example, a PET film.
  • the security element 1 also has a security feature formed by structures.
  • a first region 5 is formed with light-refracting structures 6, wherein the light-refracting structures 6 are designed to are designed to refract incident light and generate a focal line image.
  • a second region 7 is formed with diffractive structures 8, wherein the diffractive structures 8 are designed to diffract incident light and generate a diffraction image.
  • the light-refracting structures 6 are shown in the figures in a simplified manner by means of semicircular or hemispherical structures, but may have any other shape which causes incident light, for example daylight or a laser beam, to be refracted in such a way that a focal line image is generated.
  • the diffractive structures 8 are shown in the figures in a simplified manner by means of step-like contours, but may have any other shape which causes incident light, for example daylight or a laser beam, to be diffracted in such a way that a diffraction image is generated.
  • a protective lacquer layer 13 can be applied to the first side 2, and a primer 9 can be applied to the second side 3.
  • a heat-sealing lacquer 12 can be arranged on the primer 9 on one of the two sides, for example, on the second side 3, as the outermost layer of the arrangement, protecting the layer structure.
  • This heat-sealing lacquer can be used, as is known per se, to apply the security element 1 to a security document or to facilitate its application.
  • the focal line image is perceptible on or in a first surface, and that the diffraction image is perceptible on or in a second surface located above or below the first surface.
  • This perceptual effect may, in particular, be independent of whether the light-refracting structures 6 and the diffractive structures 8 are actually formed in different layers.
  • an overall image may be formed by the light-refracting structures 6 and the diffractive structures 8.
  • partial images or individual images may be formed by the light-refracting structures 6 and the light-diffracting structures 8.
  • the focal line image and/or the diffraction image may represent at least one portrait, a landscape, a building and/or an animal and/or a pattern and/or an abstract geometric character, logo or an alphanumeric character and/or an icon and/or a symbol and/or a code and/or a sequence of characters.
  • an embossing lacquer 10 can be applied to the upper side of the carrier layer 4, which is aligned as shown and faces the first side 2 of the security element 1.
  • the light-refracting structures 6 can be embossed into this embossing lacquer 10.
  • a further embossing lacquer 11 can be applied to the light-refracting structures 6 or to the embossing lacquer 10.
  • the diffractive structures 8 can be embossed into this further embossing lacquer 11.
  • first region 5 and the second region 7 may be formed in different layers.
  • the second region 7 overlaps or covers the first region 5 or the diffractive structures 8 completely overlap or cover the light-refracting structures 6 when viewing the first side 2 of the security element 1.
  • the light-refracting structures 6 and the diffractive structures 8 can be embossed directly into the carrier layer 4.
  • This example also shows that the first region 5 and the second region 7, or the light-refracting structures 6 and the diffractive structures 8, can be formed in the same layer. In the example shown, both regions 5, 7 and structures 6, 8 are formed in the carrier layer 4.
  • the diffractive structures 8 are comparatively smaller than the light-refracting structures 6, so that when the security element 1 is illuminated in transmitted light or in transmission, the diffractive structures 8 of the second area 7 are partially are formed on and/or in the light-refracting structures 6 of the first region 5. It may also be the case that, when the security element 1 is illuminated in transmitted light or in transmission, the light-diffractive structures 8 of the second region 7 and the light-refracting structures 6 of the first region 5 are arranged superimposed on one another.
  • the light-refracting structures 6 can be embossed directly into the carrier layer 4.
  • a layer containing a primer 9 can be applied to this embossed carrier layer 4.
  • An embossing lacquer 10 can be applied to this primer 9.
  • the diffractive structures 8 can be embossed into this embossing lacquer 10 in a second region 7.
  • the embossing lacquer 10, or the embossed structures 8, can in turn be covered by an outer protective lacquer layer 13.
  • first region 5 and the second region 7 may be formed in different layers. Furthermore, it is shown that when the security element 1 is illuminated in transmitted light or in transmission, the second region 7 may partially cover the first region 5.
  • the security element 1 when the security element 1 is illuminated in transmitted light or in transmission, the first region 5 and the second region 7 are arranged next to one another. However, this is not shown in the figure.
  • the light-refracting structures 6 and the diffractive structures 8 can be embossed directly into the carrier layer 4. This example also shows that the first region 5 and the second region 7, or the light-refracting structures 6 and the diffractive structures 8, can be formed in the same layer.
  • the diffractive structures 8 and the light-refracting structures 6 are arranged next to one another or the diffractive structures 8 and the light-refracting structures 6 are arranged nested within one another.
  • All of the security elements 1 shown can be arranged or formed in a security document or security paper.

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EP23213712.5A 2023-12-01 2023-12-01 Élément de sécurité avec image de ligne de combustion et image de diffraction Pending EP4563367A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP23213712.5A EP4563367A1 (fr) 2023-12-01 2023-12-01 Élément de sécurité avec image de ligne de combustion et image de diffraction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23213712.5A EP4563367A1 (fr) 2023-12-01 2023-12-01 Élément de sécurité avec image de ligne de combustion et image de diffraction

Publications (1)

Publication Number Publication Date
EP4563367A1 true EP4563367A1 (fr) 2025-06-04

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EP23213712.5A Pending EP4563367A1 (fr) 2023-12-01 2023-12-01 Élément de sécurité avec image de ligne de combustion et image de diffraction

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9770934B2 (en) * 2009-07-09 2017-09-26 Ovd Kinegram Ag Multi-layer body
EP2864130B1 (fr) * 2012-06-26 2018-08-29 OVD Kinegram AG Élément décoratif et document de sécurité comportant un élément décoratif
FR3072325A1 (fr) * 2017-10-10 2019-04-19 Surys Composant optique de securite visible en reflexion, fabrication d'un tel composant et document securise equipe d'un tel composant
WO2020095049A1 (fr) * 2018-11-08 2020-05-14 De La Rue International Limited Procédés de fabrication de composants de dispositifs de sécurité

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9770934B2 (en) * 2009-07-09 2017-09-26 Ovd Kinegram Ag Multi-layer body
EP2864130B1 (fr) * 2012-06-26 2018-08-29 OVD Kinegram AG Élément décoratif et document de sécurité comportant un élément décoratif
FR3072325A1 (fr) * 2017-10-10 2019-04-19 Surys Composant optique de securite visible en reflexion, fabrication d'un tel composant et document securise equipe d'un tel composant
WO2020095049A1 (fr) * 2018-11-08 2020-05-14 De La Rue International Limited Procédés de fabrication de composants de dispositifs de sécurité

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