Photocopying – Including fiber optics
Patent
1980-04-28
1983-07-12
Braun, Fred L.
Photocopying
Including fiber optics
354 3, 354317, 355 10, 355 27, G03G 1510
Patent
active
043927343
ABSTRACT:
Camera for making slide transparencies on electrophotographic film which is carried during processing on one-half of a foldable, planar slide frame. The apparatus includes a reversible drive roll which automatically injects and ejects the frame carrying film for imaging and developing along the processing path of the camera. A corona unit for charging the photoconductive layer of the film is energized during inward movement of the film into the camera. After imaging by a light source, a liquid toner is activated for developing the image during withdrawal of the film along the processing path. The toner head includes spaced doctor blades for removal from the film of excess toner. The camera includes a fan which generates positive air pressure along the processing path during withdrawal of the film. Sensors are provided for processing elements including controlling an electric circuit for sequential operation of the drive roll, corona charging unit, toner pump and fan.
REFERENCES:
patent: 2752833 (1956-07-01), Jacob
patent: 3027821 (1962-04-01), Wright
patent: 3528355 (1970-09-01), Blackert
patent: 3672763 (1972-06-01), Levene et al.
patent: 3694069 (1972-09-01), Yamaji et al.
patent: 3792488 (1974-02-01), Katakabe
patent: 4118116 (1978-10-01), Koontz et al.
patent: 4157219 (1979-06-01), Ohta et al.
Braun Fred L.
Dempsey John J.
Photon Chroma, Inc.
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