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AssigneeGAO Gesellschaft fur Automation und Organisation mbH
InventorsChristoph Heckenkamp, Wittich Kaule, Gerhard Stenzel
Estimating the term…
The invention relates to a system comprising a series of data carriers, in particular identity cards, papers of value or the like, whereby the data carriers belonging to the system exhibit diffraction structures containing standard information and parts of the series are changed by additional measures in the area of the diffraction structures or combined with other elements and they differ from the rest of the series in optically recognizable fashion, whereby the change in the diffraction structures and/or the combination with other elements convey an esthetic overall impression and the change and/or combination with the other elements cannot be undone without destruction of the diffraction structures.
A system comprising a series of data carriers which are manufactured and thereafter issued for use, each of the data carriers having a body provided with only a single, multilayer, optically variable element, said optically variable element comprising diffraction structures which are combined with a reflective layer impermeable in the visual spectral range, the diffraction structures presenting visually recognizable information which is identical for all data carriers of the system, the appearance of said information visually changing depending on the angle from which the optically variable element is viewed, the appearance changes comprising an authenticity feature which can be recognized visually by the unaided human eye, each of the data carriers of the system being provided with an alteration in a portion of the optically variable element, the remaining portions of the optically variable element being unaltered so that said unaltered portion and said altered portion may be separately but simultaneously viewed, said alteration comprising the partial removal or destruction of all layers of the optically variable element, said alteration providing an irreversible and visually recognizable change of the optically variable element and the appearance of the information presented by the diffraction structures which can be visually recognized by the unaided human eye, said change being recognizable under all viewing angles of the optically variable element and remaining constant regardless of the angle from which the optically variable element is viewed, said alteration being effected prior to issuance of the data carrier.
A data carrier which is manufactured and thereafter issued for use, said data carrier having a body provided with only a single, multilayer, optically variable element comprising diffraction structures combined with a reflective layer impermeable in the visual spectral range, the diffraction structures presenting visually recognizable information, the appearance of which visually changes depending from an angle from which the optically variable element is viewed, the appearance changes comprising an authenticity feature which can be recognized visually by the unaided human eye, the layers of the optically variable element of the data carrier being irreversibly altered in a portion of the optically variable element prior to issuance of the data carrier, the remaining portions of the optically variable element being unaltered so that said unaltered portion and said altered portion may be separately but simultaneously viewed, said alteration comprising the partial removal or destruction of all the layers of the optically variable element, said alteration changing the appearance of the information presented by the diffraction structure of the optically variable element in an irreversible manner which can be visually recognized by the unaided human eye, the alteration being viewable under all viewing angles of the optically viewable element and remaining constant regardless of the angle from which the optically variable element is viewed.
A multilayered, optically variable element for a data carrier comprising diffraction structures combined with a reflective layer which is impermeable in the visual spectral range, the diffraction structures providing visually recognizable information, the appearance of which visually changes depending on the angle from which the element is viewed, the appearance change comprising an authenticity feature which can be visually recognized by the unaided human eye, the layers of the optically variable element being irreversibly altered in a portion of the optically variable element, the remaining portions of the optically variable element being unaltered so that said unaltered portion and said altered portion may be separately but simultaneously viewed, said alteration comprising the partial removal or destruction of all layers of the optically variable element, said alteration changing the appearance of the information presented by the diffraction structures of the optically variable element in an irreversible manner which can be visually recognized by the unaided human eye, the alteration being recognized under all viewing angles of the optically variable element and remaining constant regardless of the angle from which the optically variable element is viewed.
A method for producing a series of data carriers comprising the steps of
A method for producing a data carrier comprising one of a series of data carriers, said method comprising the steps of
A method for producing an optically variable element for the application to a data carrier comprising the steps of
Dependencies are inferred from the claim text.