PROCESSES FOR PRODUCING SECURITY THREADS OR STRIPES
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United States of America Patent
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Issued Date -
Mar 17, 2016
app pub date -
Apr 24, 2014
filing date -
May 2, 2013
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Abstract
The present invention relates to the field of the protection of value documents and value commercial goods against counterfeit and illegal reproduction. In particular, the present invention relates to processes for producing security threads or stripes to be incorporated into or onto security documents and security documents comprising said security threads or stripes. The disclosed security threads or stripes comprise a first plurality of magnetic or magnetizable pigment particles having an orientation following a convex curvature when viewed from the side where the first hardened coating and the second hardened coating are at least partially jointly visible and a second hardened coating comprising the second plurality of magnetic or magnetizable pigment particles having an orientation following a concave curvature when viewed from the side of the security thread or stripe where the first hardened coating and the second hardened coating are at least partially jointly visible so as to form a plural rolling bar effect.
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