Data support with an opticallly variable element
AssigneeGiesecke & Devrient GmbH
InventorsJohann Müller, Reinhard Plaschka, Jürgen Zerbes, Christoph Baldus
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Abstract
The invention relates to a data carrier with an optically variable structure having an embossed structure and a coating contrasting with the surface of the data carrier. The embossed structure and the coating are so combined that at least parts of the coating are completely visible upon perpendicular viewing but concealed upon oblique viewing so that a tilt effect arises upon alternate perpendicular and oblique viewing. The coating is executed uniformly and the embossed structure is divided into partial areas where different partial embossed structures are provided.
Claims30
A data carrier with an optically variable structure comprising:
- an embossed structure and a print contrasting with the surface of the data carrier, the embossed structure and the print being so combined that at least parts of the print are completely visible upon perpendicular viewing but concealed upon oblique viewing so that a tilt effect arises upon alternate perpendicular and oblique viewing,
- wherein the total area provided with print and embossed structure is divided into partial areas,
- wherein the partial areas divide the embossed structure into partial embossed structures, wherein different partial areas are provided with different partial embossed structures, wherein the partial embossed structures comprise embossed lines having flanks that are visible upon certain viewing angles, and wherein the print is a line screen that is constant across all partial areas,
- wherein the partial areas form two dimensional matrix of visually recognizable partial areas, the partial areas being visually recognizable due to a visual effect of the different partial embossed structures with respect to the print, the matrix having m partial areas in a horizontal direction and n partial areas in a vertical direction, the partial areas of the matrix being directly adjacent, where m, n≧1 and at least one of m and n>1.
A method for producing a data carrier with an optically variable structure comprising an embossed structure and a print contrasting with the surface of the data carrier, the method comprising the steps:
- providing a data carrier or data carrier material;
- providing an area of the data carrier or data carrier material with a print, the print being a line screen contrasting with the surface of the data carrier or data carrier material and being constant in the printed area;
- embossing the data carrier or data carrier material in the area of the print by means of an embossing die, comprising an embossing die surface in which an embossing structure is engraved, the embossing structure being divided into partial areas defining partial embossing structures, wherein different partial areas are provided with different partial embossing structures, and wherein the partial embossed structures comprise embossed lines having flanks that are visible upon certain viewing angles, wherein the partial areas form two dimensional matrix of visually recognizable partial areas, the partial areas being visually recognizable due to the different partial embossed structures, the matrix having m partial areas in a horizontal direction and n partial areas in a vertical direction, the partial areas of the matrix being directly adjacent, where m, n≧1 and at least one of m and n>1.
Dependencies are inferred from the claim text.