Documents of value including intaglio printed transitory images

Details Documents of value including intaglio printed transitory images Documents of value including intaglio printed transitory images

1975-04-18

1977-07-05

Coughenour, Clyde I.

Card, picture, or sign exhibiting

Display card

Having a curved display panel

101150, 283 8B, 427 7, 428 30, 428916, G09F 716

Patent

active

040330591

ABSTRACT:
An imprint of inked intaglio pattern elements such as lines on a document of value or the like, including background portions and readily recognizable image portions each formed by pattern elements of the imprint. The pattern elements forming the image portions differ in orientation or depth from pattern elements forming the background portion to provide variation in contrast between image and background with change in angle of view of the document, the pattern elements being so arranged that the image blends visually with the background from one angle of view but appears as a readily recognizable symbol in clear contrast to the background from another angle of view.

REFERENCES:
patent: 993 (1860-07-01), Albro
patent: 734135 (1903-07-01), Porter
patent: 1002600 (1911-09-01), Morris et al.
patent: 1114346 (1914-10-01), Farmer
patent: 1996539 (1935-04-01), Dufay
patent: 2313489 (1943-03-01), Latrobe
patent: 2850825 (1958-09-01), Grants
patent: 3471172 (1969-10-01), Bayha

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