Liquid crystalline platen for an electrophotographic printing ma

Details Liquid crystalline platen for an electrophotographic printing ma Liquid crystalline platen for an electrophotographic printing ma

1975-04-28

1977-03-15

Bauer, Edward S.

Photocopying

Contact printing

Light boxes

355 40, 355 79, G02F 113

Patent

active

040121224

ABSTRACT:
An apparatus in which an original document is housed. The support on which the original document is positioned becomes selectively opaque so as to mask portions of the original document disposed thereon.

REFERENCES:
patent: 3642371 (1972-02-01), Jones et al.
patent: 3807833 (1974-04-01), Graham et al.
patent: 3824604 (1974-07-01), Stein
patent: 3844650 (1974-10-01), Nicholson et al.

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