Photocopying – Miscellaneous
Patent
1982-04-26
1984-06-26
Wintercorn, Richard A.
Photocopying
Miscellaneous
283 72, 354105, 355 40, 355 75, G03B 2752
Patent
active
044563736
ABSTRACT:
A device and method for deterring unauthorized use of xerographic copying machines of the type having a transparent platen on which a document having a primary image to be copied is registrable and which reproduces the primary image thereby creating a copy of the document, the device comprising a transparent substrate rigidly associated with the platen and bearing a secondary image thereon so that the primary and secondary images are concurrently reproducible on the document copy without affecting the visual perception of the primary image. The method comprises providing the platen with a secondary image, registering the document on the platen, and operating the copying machine so as to simultaneously reproduce the primary and secondary images.
REFERENCES:
patent: 214541 (1979-04-01), Windrath
patent: 1506361 (1924-08-01), Bulask
patent: 3612684 (1971-10-01), Jones et al.
patent: 3623413 (1969-02-01), Richards
patent: 3642370 (1972-02-01), Meredith et al.
patent: 3775007 (1973-11-01), Davidson
patent: 3802724 (1974-04-01), Gosnell
patent: 4029414 (1977-06-01), Rubenstein
patent: 4123767 (1978-10-01), Halpern
patent: 4193684 (1980-03-01), Armstrong
patent: 4251152 (1981-02-01), Miyakawa et al.
patent: 4265469 (1981-05-01), Mowry, Jr. et al.
Article, Greensboro Daily News, Sep. 19, 1983.
Burlington Industries Inc.
Wintercorn Richard A.
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