Patent image reproducing electrophotographic machine

Details Patent image reproducing electrophotographic machine Patent image reproducing electrophotographic machine

1984-12-19

1987-02-03

Prescott, A. C.

Photocopying

Including fiber optics

355 1, 355 7, 355 14E, G03G 1500

Patent

active

046406018

ABSTRACT:
An electrophotographic copying machine includes a photosensitive drum. A first electrostatic latent image according to an original copy image is formed in a state wherein a certain electric charge is accumulated and an original copy image formed by a first light source like a halogen lamp is focussed on this photosensitive drum. In order to form an additional information other than the original copy image, an LED array as a second light source is provided. By the second light source the additional information is formed on the photosensitive drum as the second electrostatic latent image. In case of recording the additional information, a shield member is utilized to prevent the electrostatic latent image by the original copy from being formed in the corresponding region of the photosensitive drum. The photosensitive drum comprises a material like amorphous silicon which is able to react to both first and second light sources.

REFERENCES:
patent: 4376576 (1983-03-01), Snelling
patent: 4408870 (1983-10-01), Nishikawa et al.
patent: 4435064 (1984-03-01), Tsukada et al.
patent: 4447126 (1984-05-01), Heidrich et al.

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