Duplicator processor

Photocopying – Including fiber optics

Patent

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Details

355 10, 355 14, 355 16, 355 27, 355 50, G03G 1528, G03G 1532

Patent

active

039515419

ABSTRACT:
Strip film of the conventional silver halide emulsion type is duplicated by optically projecting the images onto a high speed electrophotographic film in a system comprising a flow type camera having the original film and the electrophotographic film travelling at the identical film speed. The first station for the electrophotographic film is a charging station, followed by the projection slit, a toning station and a toner fixing station.
The background density of the original film is measured by photometric means and compared with preset density standards, the resulting information being used to enhance the image produced on the electrophotographic film by varying the charge voltage level. Charge level will control the amount of toner which adheres for a given time of toning.

REFERENCES:
patent: 3168857 (1965-02-01), Hutto
patent: 3196765 (1965-07-01), Walkup
patent: 3408144 (1968-10-01), Cowan
patent: 3597063 (1971-08-01), Hayashi et al.
patent: 3598489 (1971-08-01), Thomas
patent: 3698807 (1972-10-01), Weigl
patent: 3711198 (1973-01-01), Nordine
patent: 3724941 (1973-04-01), Honjo
patent: 3748034 (1973-07-01), Luebbe

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