Security element for electronic article surveillance and method of manufacturing a security element
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United States of America Patent
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Jun 1, 1999
Grant Date -
N/A
app pub date -
Sep 29, 1997
filing date -
Oct 12, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is directed to a security element for electronic article surveillance in an electromagnetic surveillance system, comprising a soft magnetic, magnetostrictive strip and a premagnetization element fabricated from a semi-hard or hard magnetic material that is associated with the strip, and to a method of manufacturing such security elements. With regard to the security element the premagnetization element is configured such that, by application of an essentially constant external field (H), it produces a stray field that optimizes the magneto-elastic properties of the stripe.
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