Electrophotography

Details Electrophotography Electrophotography

1978-10-24

1981-05-05

Moses, R. L.

Photocopying

Including fiber optics

430 53, 430 68, G03G 1500

Patent

active

042655315

ABSTRACT:
Disclosed is a method for protecting a primary electrostatic latent image formed on a screen type photosensitive member. In the step for modulating ion streams or toner particle streams by the primary electrostatic latent image, due to a bias voltage impressed on the screen type photosensitive member natural corona discharge is generated by a corona discharge electrode used for forming a primary electrostatic latent image or natural discharge is generated between the photosensitive member and a conductor located close thereto so that the degradation or destruction of the primary electrostatic latent image result. The present invention provides the methods for solving this problem by electrically isolating the photosensitive member, the corona discharge electrodes and other conductors in the vicinity of the photoconductive member when a bias voltage is impressed on the latter.

REFERENCES:
patent: 2836725 (1958-05-01), Vyverberg
patent: 2856533 (1958-10-01), Rosenthal
patent: 2868989 (1959-01-01), Haacke
patent: 2879395 (1959-03-01), Walkup
patent: 3881818 (1975-05-01), McFarlane et al.
patent: 3900852 (1975-08-01), Raschke
patent: 4021109 (1977-05-01), Tanaka et al.

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