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Nonreplicable document and method for making same

  • US 5,193,853 A
  • Filed: 04/03/1992
  • Issued: 03/16/1993
  • Est. Priority Date: 01/18/1989
  • Status: Expired due to Fees
First Claim
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1. A press-printed document which is counterfeit-resistant with regard to a known electro-optical copy means which copy means has a predetermined scanning pitch, said document comprising;

  • at least one image which is characterized by myriad visible and distinct press-printed lineations, said press-printed lineations comprising patterns of curvilinear lines, dots, or swirls, the lineations having a moire-producing pitch that is dissonant from said predetermined scanning pitch, whereby if said document is copied on said known copy means, the copy of he document so produced reveals image omissions and moire skewing which result from a misregistry between said predetermined-scanning pitch and the pitch of the press-printed lineations.

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