# US 2017/0197452 A1 · Method for manufacturing a multilayer data medium with security marking which can be marked by laser > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0197452 A1 - Document ID: US20170197452A1 - Status: Published application - Kind: A1 - Application number: 15/314,658 - Filed: 2015-06-12 - Published: 2017-07-13 - Earliest claimed: 2014-06-13 - Assignees: Fasver - Applicants: Fasver - Inventors: Eric PHILIPPE; Laurence BES - Web page: https://patentgrep.com/patent/US20170197452A1 ## CPC - B42D 25/364: Liquid crystals - B32B 27/08: of synthetic resin - B32B 27/304: {comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF} - B32B 27/36: comprising polyesters - B32B 27/365: {comprising polycarbonates} - B32B 37/10: characterised by the pressing technique, e.g. using action of vacuum or fluid pressure - B32B 38/0008: {Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation (heat treatment B32B38/0036)} - B41M 3/148: {Transitory images, i.e. images only visible from certain viewing angles} - B41M 5/267: {Marking of plastic artifacts, e.g. with laser} - B42D 25/351: Translucent or partly translucent parts, e.g. windows - B42D 25/36: comprising special materials - B42D 25/41: using electromagnetic radiation (B42D25/435 takes precedence) - B42D 25/455: using heat - B42D 25/46: using pressure - B32B 2307/4026: within the layer by addition of a colorant, e.g. pigments, dyes - B32B 2307/412: Transparent - B32B 2425/00: Cards, e.g. identity cards, credit cards - 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 - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P) ## Abstract The invention relates to a method for manufacturing a multi-layer data medium by hot rolling under pressure, able to be marked under the effect of laser radiation applied to at least one outer surface (11) of this medium, in which at least one marking (13) with optically variable effect is disposed with respect to a laser marking sub-layer so that said outer surface (11) has a portion with optically variable effect optically superimposed on at least one part of the laser marking sub-layer and a portion (16) without marking with optically variable effect optically superimposed on at least one part of the laser marking sub-layer. These portions are produced with contents of at least one marking agent which is sensitive to said laser radiation which are different. ## Claims ### Claim at position 1 1-14. (canceled) ### Claim 15 Method for manufacturing a multi-layer data medium by hot rolling under pressure of a stack of a plurality of superimposed layers comprising at least one layer made of at least one thermoplastic material, able to be marked under the effect of laser radiation applied to at least one outer surface (11) of said data medium, wherein: at least one layer, named covering layer (21, 22): which is transparent to marking laser radiation, extending between said outer surface (11) and a layer, named laser marking sub-layer (20), sensitive to this laser radiation, so as to permit the production of a marking in the marking sub-layer (20) under the effect of this laser radiation passing through each covering layer (21, 22), incorporating at least one marking (13) with optically variable effect disposed with respect to the laser marking sub-layer so that said outer surface (11) has a portion with optically variable effect optically superimposed on at least one part of the laser marking sub-layer (20) and a portion (16) without marking with optically variable effect optically superimposed on at least one part of the laser marking sub-layer (20), wherein: said at least one covering layer (21, 22) also incorporates at least one marking agent which is sensitive to said laser radiation so as to permit the production of a marking in said at least one covering layer (21, 22) under the effect of this laser radiation, said portion (16) without marking with optically variable effect and said portion with optically variable effect are produced with contents of at least one marking agent which is sensitive to said laser radiation, between said outer surface (11) of the medium and said laser marking sub-layer (20), which are different. ### Claim 16 (depends on 15) Method according to claim 15, wherein each marking (13) with optically variable effect is disposed with respect to the laser marking sub-layer (20) so that said laser marking sub-layer (20) extends facing at least one separation (17, 18) between the portion with optically variable effect and the portion (16) without marking with optically variable effect. ### Claim 17 (depends on 15) Method according to claim 15, wherein said contents of at least one marking agent which is sensitive to said laser radiation are selected so that the laser marking obtained under the effect of said laser radiation, as seen from said outer surface (11), is at least substantially homogeneous. ### Claim 18 (depends on 15) Method according to claim 15, wherein said portion (16) without marking with optically variable effect is without any marking agent which is sensitive to said laser radiation, at least one marking agent which is sensitive to said laser radiation being incorporated into at least one covering layer (21, 22) only in said portion with optically variable effect. ### Claim 19 (depends on 15) Method according to claim 15, wherein at least one covering layer (21, 22) incorporating at least one marking agent which is sensitive to said laser radiation and at least one covering layer (21, 22) comprising at least one marking with optically variable effect are optically superimposed. ### Claim 20 (depends on 15) Method according to claim 15, wherein at least one marking agent which is sensitive to said laser radiation is incorporated in at least one covering layer (21, 22) comprising at least one marking with optically variable effect. ### Claim 21 (depends on 15) Method according to claim 15, wherein each covering layer (21, 22) and the laser marking sub-layer (20) are hot rolled under pressure after production of each marking with optically variable effect. ### Claim 22 Multi-layer data medium comprising at least one layer made of at least one thermoplastic material, able to be marked under the effect of laser radiation applied to at least one outer surface (11) of this data medium, comprising: at least one layer, named covering layer (21, 22): which is transparent to marking laser radiation, extending between said outer surface (11) and placed covering a layer, named laser marking sub-layer (20), sensitive to this laser radiation, so as to permit the production of a marking in the marking sub-layer (20) under the effect of this laser radiation through each covering layer (21, 22), incorporating at least one marking (13) with optically variable effect disposed with respect to the laser marking sub-layer so that said outer surface (11) has a portion with optically variable effect optically superimposed on at least one part of the laser marking sub-layer (20) and a portion (16) without marking with optically variable effect optically superimposed on at least one part of the laser marking sub-layer (20), wherein: said at least one covering layer (21, 22) also incorporates at least one marking agent which is sensitive to said laser radiation so as to permit the production of a marking in said at least one covering layer (21, 22) under the effect of this laser radiation, said portion (16) without marking with optically variable effect and said portion with optically variable effect have contents of at least one marking agent which is sensitive to said laser radiation, between said outer surface (11) of the medium and said laser marking sub-layer (20), which are different. ### Claim 23 (depends on 22) Medium according to claim 22, wherein said laser marking sub-layer (20) extends facing at least one separation between the portion with optically variable effect and the portion (16) without marking with optically variable effect. ### Claim 24 (depends on 22) Medium according to claim 22, wherein said contents of at least one marking agent which is sensitive to said laser radiation are such that the laser marking obtained under the effect of said laser radiation, as seen from said outer surface (11), is at least substantially homogeneous. ### Claim 25 (depends on 22) Medium according to claim 22, wherein said portion (16) without marking with optically variable effect is without any marking agent which is sensitive to said laser radiation, at least one marking agent which is sensitive to said laser radiation being incorporated into at least one covering layer (21, 22) only in said portion with optically variable effect. ### Claim 26 (depends on 22) Medium according to claim 22, wherein each covering layer (21, 22) is transparent in the visible range of wavelengths, and wherein the laser marking sub-layer (20) is adapted to produce a marking in the visible range of wavelengths under the effect of said laser radiation. ### Claim 27 (depends on 22) Official document comprising a data medium according to claim 22, of which at least one outer surface (11) has at least one laser marking. ### Claim 28 (depends on 27) Document according to claim 27, wherein at least one laser marking is optically superimposed on at least one separation (17, 18) between at least one marking with optically variable effect and the portion without marking with optically variable effect, and wherein said laser marking is at least substantially homogeneous as seen from said outer surface (11). ### Claim 29 (depends on 16) Method according to one of claims 16, wherein said contents of at least one marking agent which is sensitive to said laser radiation are selected so that the laser marking obtained under the effect of said laser radiation, as seen from said outer surface (11), is at least substantially homogeneous. ### Claim 30 (depends on 16) Method according to claim 16, wherein said portion (16) without marking with optically variable effect is without any marking agent which is sensitive to said laser radiation, at least one marking agent which is sensitive to said laser radiation being incorporated into at least one covering layer (21, 22) only in said portion with optically variable effect. ### Claim 31 (depends on 17) Method according to claim 17, wherein said portion (16) without marking with optically variable effect is without any marking agent which is sensitive to said laser radiation, at least one marking agent which is sensitive to said laser radiation being incorporated into at least one covering layer (21, 22) only in said portion with optically variable effect. ### Claim 32 (depends on 16) Method according to claim 16, wherein at least one covering layer (21, 22) incorporating at least one marking agent which is sensitive to said laser radiation and at least one covering layer (21, 22) comprising at least one marking with optically variable effect are optically superimposed. ### Claim 33 (depends on 17) Method according to claim 17, wherein at least one covering layer (21, 22) incorporating at least one marking agent which is sensitive to said laser radiation and at least one covering layer (21, 22) comprising at least one marking with optically variable effect are optically superimposed. ### Claim 34 (depends on 18) Method according to claim 18, wherein at least one covering layer (21, 22) incorporating at least one marking agent which is sensitive to said laser radiation and at least one covering layer (21, 22) comprising at least one marking with optically variable effect are optically superimposed.