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Tamperproof security card

  • US 4,869,946 A
  • Filed: 12/29/1987
  • Issued: 09/26/1989
  • Est. Priority Date: 12/29/1987
  • Status: Expired due to Term
First Claim
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1. A security card comprising an image-containing substrate layer and a transparent layer overlaying said substrate, said transparent layer having a plurality of parallel uniformly-spaced lenticules on the outer surface therof, and said image-containing layer having discrete data-containing bands under and parallel to a plurality of the lenticules of the lenticular layer, said lenticules and said bands positioned with respect to one another such that they function as a lenticular system wherein said discrete bands are selectively visible and not visible as at least one data-containing image when the card is viewed from different angles about an axis of rotation parallel to said lenticules, said at least one data-containing image containing information which distinguishes said card from otherwise similar cards and which is unique to a particular person assigned to said card.

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