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Method and apparatus for making paper of value having an optically variable security element

  • US 5,817,205 A
  • Filed: 07/07/1995
  • Issued: 10/06/1998
  • Est. Priority Date: 02/01/1990
  • Status: Expired due to Term
First Claim
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1. A method for producing a data carrier with an optically variable element, comprising the steps of:

  • providing a paper substrate with a first finished surface area having a first surface roughness that produces distortion of a film optical element bonded thereon;

    calendaring and thereby compressing the substrate at a pressure causing a depression below the surface of the first finished area in a partial area of the first finished surface area to produce a second finished surface area with a second surface roughness that will not distort a film optical element bonded thereon;

    applying a film optical element to at least a partial area of the second finished surface area.

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