Security paper

Paper making and fiber liberation – Processes and products – Including solid non-waterlaid preform

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Details

162123, 162124, 162125, 162132, 162140, 162186, D21D 300, D21H 510

Patent

active

045343985

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.

REFERENCES:
patent: 28370 (1860-05-01), Howell
patent: 167223 (1875-08-01), Casilear
patent: 3880706 (1975-04-01), Williams
patent: 4037007 (1977-07-01), Wood
patent: 4437935 (1984-03-01), Crane, Jr.
patent: 4462867 (1984-07-01), Fuller

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