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US 2022/0024100 A1Published application
Coextrusion of periodically modulated structures
AssigneeGiesecke+Devrient Mobile Security GmbH
InventorJosef RIEDL
Life of this patent
Estimating the term…
Abstract
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. Varying of the geometry is effected by means of a movement of a position-variable distributor rail of the extruder.
Claims9
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 the 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 movement of a position-variable distributor rail of the extruder.
Dependencies are inferred from the claim text.