Electrophotographic copying process

Details Electrophotographic copying process Electrophotographic copying process

1983-11-07

1986-01-21

Grimley, A. T.

Photocopying

Including fiber optics

355 3CH, 355 14CH, 430 55, 361229, G03G 1522

Patent

active

045654360

ABSTRACT:
An electrophotographic process and apparatus for performing the process which employs an electrophotographic photosensitive member of a basic construction in which a photoconductive layer and a transparent insulator layer are sequentially laminated on the surface of a conductive supporter. The process comprises a first step of providing a primary charge uniformly from the surface side of the transparent insulator layer, a second step of performing a secondary corona charging during an imagewise exposure by applying a square wave voltage whose voltage-time integration value of a polarity reverse to the primary charge is larger than that of the same polarity thereas and a third step of forming an electrostatic latent image on the surface of the transparent insulator layer by applying a uniform exposure.

REFERENCES:
patent: 3775104 (1973-11-01), Matsumoto et al.
patent: 4038593 (1977-07-01), Quinn

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