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Antifalsification document having a security thread embedded therein and a method for producing the same

  • US 4,892,336 A
  • Filed: 03/18/1987
  • Issued: 01/09/1990
  • Est. Priority Date: 03/18/1986
  • Status: Expired due to Fees
First Claim
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1. An antifalsification document comprising a security thread embedded within the document, wherein said security thread is made of a transparent material;

  • a first side of said security thread exhibits a printed pattern;

    a second side of said security thread spaced away from said printed pattern, defining an outer surface area of said security thread, exhibits an optically effective structure wherein when said printed pattern is viewed through said optically effective structure different areas of said printed pattern are recognizable at different viewing angles, andwherein said printed pattern is configured so that an optical appearance of said security thread changes when viewing angle changes.

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