Paper making and fiber liberation – Processes and products – Including solid non-waterlaid preform
Patent
1984-04-30
1985-08-13
Chin, Peter
Paper making and fiber liberation
Processes and products
Including solid non-waterlaid preform
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
Chin Peter
Crane & Co.
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