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Currency paper and banknote verification device

  • US 5,308,992 A
  • Filed: 12/31/1991
  • Issued: 05/03/1994
  • Est. Priority Date: 12/31/1991
  • Status: Expired due to Term
First Claim
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1. A device for verifying authenticity of currency paper and banknotes comprising:

  • a currency receiver arranged for accepting at least one edge of a proferred currency paper;

    transmitter means proximate said currency receiver providing a pair of electronic signals of opposite phase;

    detector means intermediate said transmitter means adjustably balancing said electronic signals when a security thread comprising a metallized plastic strip is absent from said currency paper; and

    circuit means connected with said detector means determining an imbalance between said electronic signals when said security thread is within said currency paper.

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  • 3 Assignments
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