Apparatus for reproducing a copy image according to either a pos

Details Apparatus for reproducing a copy image according to either a pos Apparatus for reproducing a copy image according to either a pos

1987-10-29

1989-02-21

Moses, R. L.

Photocopying

Including fiber optics

355 3R, G03G 1500

Patent

active

048069744

ABSTRACT:
A microfilm reader printer has a reader unit which projects a microfilm image onto a screen and a printer unit which reproduces copies of the microfilm image. The printer unit includes an optical device for forming the electrostatic image on a photoreceptor by exposing the microfilm image onto the photoreceptor and a developing device for visualizing the electrostatic latent image formed on the photoreceptor. The developing device has a developing unit for achieving reversal development. The photoreceptor receives a uniformly recharging process by a recharging unit and an overall exposure by an exposure unit. Then, the developed image is removed and the latent image is reversely developed again by the developing unit. A positive copy may be reproduced from both positive and negative types of a microfilm by selectively operating the recharging unit, exposure unit and developing unit.

REFERENCES:
patent: 3674354 (1972-07-01), Artaud et al.
patent: 3738744 (1973-06-01), Cassano et al.
patent: 4341463 (1982-07-01), Kashiwagi
patent: 4678314 (1987-07-01), Uchida et al.

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