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Articles employing a magnetic security feature

  • US 5,697,649 A
  • Filed: 05/11/1995
  • Issued: 12/16/1997
  • Est. Priority Date: 05/11/1995
  • Status: Expired due to Fees
First Claim
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1. An article for use with security documents that comprises a plastic substrate having at least one security feature located thereon, wherein said security feature is a machine detectable security feature comprising a layer of a soft magnetic metal, wherein said soft magnetic metal is an amorphous metal glass having a low magnetic coercivity of from about 50 to about 5000 amperes per meter, and wherein said layer of said soft magnetic metal has a thickness ranging from about 0.10 to 0.50 microns.

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