Coextrusion of periodically modulated structures
AssigneeGiesecke+Devrient Mobile Security GmbH
InventorJosef Riedl
Life of this patent
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Abstract
The invention is directed to a method for manufacturing a foil having a variable strip geometry, which makes it possible to supply a foil that bears a complex security feature. The present invention is further directed to a corresponding data carrier having the foil supplied, and to the foil itself. The invention further relates to an extruder system for manufacturing a foil having a variable strip geometry and to a computer program product having control commands that implement the proposed method and/or operate the proposed extruder system.
Claims10
A method for manufacturing a foil having a variable strip geometry for employment in a data carrier, having:
- extrusion of at least one first surface and at least one second surface, in such a manner that the surfaces form the foil in a sequence that alternates orthogonally to an extrusion direction, wherein a varying is effected of at least one of the surfaces with respect to its geometry;
- wherein the varying of the geometry is effected by means of a transverse movement of at least one roller of an extruder.
Dependencies are inferred from the claim text.