Electrographic apparatus having a screen-type photoconductive dr

Details Electrographic apparatus having a screen-type photoconductive dr Electrographic apparatus having a screen-type photoconductive dr

1977-05-26

1979-03-06

Braun, Fred L.

Photocopying

Including fiber optics

355 3CH, G03G 1500

Patent

active

041427912

ABSTRACT:
An electrographic apparatus which makes use of a screen drum composed of a mesh-shaped photosensitive screen. The apparatus comprises one corona discharge device, a corona voltage source circuit including a corona voltage source switch connected to an input side of said corona voltage source circuit and a polarity change-over switch connected between said corona voltage source circuit and said corona discharge device. A first step of uniformly charging said photosensitive screen and a second step of charging a dielectric coated record sheet with an electrostatic charge image corresponding to an image to be recorded are effected by one corona discharge device only.

REFERENCES:
patent: 3985432 (1976-10-01), Hou et al.
patent: 4040731 (1977-08-01), Nishikawa
patent: 4046466 (1977-09-01), Ando et al.
Noto; Fedele A; "Copier with Single Corona Generating Device," Xerox Disclosure Journal, Feb. 1976, vol. 1, No. 2, p. 93.

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