Electrophotographic process of retention type

Details Electrophotographic process of retention type Electrophotographic process of retention type

1982-09-27

1984-07-03

Welsh, John D.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

To produce multiple image on medium or plural radiant energy...

430 55, 430126, 355 3CH, G03G 1324

Patent

active

044579934

ABSTRACT:
An electrophotographic process for forming a given number of copies of an original once formed on a photosensitive member including a conductive drum, a photoconductive layer applied on the drum and an insulating layer applied on the photoconductive layer. The photosensitive member is first subjected simultaneously to a uniform exposure and a primary charging in one polarity, and then is subjected simultaneously to an imagewise exposure and a secondary A.C. charging. Next, the photosensitive member is subjected to a secondary uniform exposure with a reduced light intensity to such an extent that the charge image has an electrostatic contrast which is about 60 to 90 percent of the maximum attainable value. During the formation of copies by repeated development and transfer, the photosensitive member is subjected to an additional uniform exposure to restore the deterorated charge image.

REFERENCES:
patent: 4230783 (1980-10-01), Aoki et al.

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