Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Charging simultaneous with imaging
Patent
1983-11-07
1985-07-02
Martin, Roland E.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Charging simultaneous with imaging
430902, 361229, G03G 13052, G03G 1324
Patent
active
045268487
ABSTRACT:
An electrophotographic process 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 in one preferred embodiment 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 an a.c. voltage in which the firing angle of a negative half wave is controlled in phase to be within a phase angle corresponding to a lower voltage than the firing angle so that the positive discharge period may be longer than the negative one during one period, and a third step of forming an electrostatic latent image on the transparent insulator layer by applying a uniform exposure.
REFERENCES:
patent: 3760229 (1973-09-01), Silverberg
patent: 3775104 (1973-11-01), Matsumoto et al.
Mimura Yoshiyuki
Okada Takao
Toda Akitoshi
Martin Roland E.
Olympus Optical Company Ltd.
Weinstein Louis
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