Security paper
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United States of America Patent
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Aug 13, 1985
Grant Date -
N/A
app pub date -
Apr 30, 1984
filing date -
Apr 30, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention relates to a security paper document incorporating counterfeit deterrent, optical variable devices that display their optically active properties in reflectance when there are changes in the angle of incodent light with respect to the eye of the viewer. The devices are applied by means of a carrier paper and a base web format during the papermaking process. An embedment roll presses the device within the base web while the base web fibers are unconsolidated and pliable.
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