Method and apparatus for orienting magnetic flakes
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United States of America Patent
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Apr 14, 2009
Grant Date -
May 19, 2005
app pub date -
Dec 22, 2004
filing date -
Jul 15, 2002
priority date (Note) -
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Abstract
Apparatus and related methods align magnetic flakes in a carrier, such as an ink vehicle or a paint vehicle to create optically variable images in a high-speed, linear printing operation. Images can provide security features on high-value documents, such as bank notes. Magnetic flakes in the ink are aligned using magnets in a linear printing operation. Selected orientation of the magnetic pigment flakes can achieve a variety of illusive optical effects that are useful for decorative or security applications.
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