Method and means for producing a magnetically induced design in a coating containing magnetic particles
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United States of America Patent
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Apr 6, 2010
Grant Date -
Jul 13, 2006
app pub date -
Jun 29, 2004
filing date -
Jul 3, 2003
priority date (Note) -
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Abstract
The invention discloses a device and a method for transferring a predeterminable, high-resolution magnetic design onto a document printed with a magnetic ink, in particular a magnetic optically variable ink. The device comprises a body of a composite permanent-magnetic material, having at least one flat or curved surface engraved with indicia corresponding to the design to be transferred, wherein the said magnetic material is permanently magnetized, preferably in a direction substantially perpendicular to the said surface. The method comprises imprinting or coating a first surface of a sheet or web with a magnetic ink or coating composition, and approaching the imprinted sheet or web to the engraved surface of a body of magnetized composite permanent-magnetic material while the ink is wet, followed by hardening the ink.
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