Security devices incorporating optically variable adhesive
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United States of America Patent
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Apr 24, 2012
Grant Date -
Sep 6, 2007
app pub date -
Mar 5, 2007
filing date -
Mar 6, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A structure for providing an optical effect includes first and second substrates hot stamped together by an adhesive. The adhesive includes an energy activated binder having a plurality of particles distributed therein or thereon for providing the optical effect detectable through the first substrate. The particles may be optically variable flakes, thin film light interference flakes, diffractive flakes, and reflective flakes.
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