Electrophotographic process capable of forming overlaid images a

Details Electrophotographic process capable of forming overlaid images a Electrophotographic process capable of forming overlaid images a

1980-02-15

1982-05-11

Schilling, Richard L.

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, 430 67, G03G 1322

Patent

active

043294138

ABSTRACT:
The present invention is directed to process and apparatus for overlaying images making use of steps constituting a known electrophotographic process. The electrophotographic process on which the present overlay process depends is of the type in which a three-layered photosensitive member having an insulating covering layer as the top layer of the member is used. The surface of the insulating layer is charged with an electric charge simultaneously with an imagewise irradiation for a first image to be overlaid or during the time of a photo hysteresis resulted from the first image-forming irradiation being still present in the photoconductive layer of the photosensitive member. Then, AC discharging or charging with an electric charge of opposite polarity to that of the above electric charge is effected. Thereafter, an imagewise irradiation for second image is carried out to obtain an electrophotographically overlaid image from the first and second images.

REFERENCES:
patent: 3730709 (1973-05-01), Kinoshita et al.
patent: 3813243 (1974-05-01), Kitajima et al.
patent: 3871878 (1975-03-01), Mino et al.
patent: 3904408 (1975-09-01), Hanada et al.
patent: 4052206 (1977-10-01), Anzai
patent: 4071361 (1978-01-01), Marushima

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