Coextrusion of periodically modulated structures
AssigneeGiesecke+Devrient Mobile Security GmbH
InventorJosef RIEDL
Life of this patent
Estimating the term…
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.
Claims16
1-15. (canceled)
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.
An extruder system for manufacturing a foil having a variable strip geometry for employment in a data carrier, having:
- an extruder unit arranged for extruding 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 variation unit is provided that is arranged to vary at least one of the surfaces with respect to its geometry.
Dependencies are inferred from the claim text.