Electrophotographic copying apparatus

Details Electrophotographic copying apparatus Electrophotographic copying apparatus

1978-10-25

1981-04-28

Moses, Richard L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 3R, G03G 1500

Patent

active

042641861

ABSTRACT:
An electrophotographic copying apparatus has a drum with an endless photoconductive material on its periphery and has arranged around the periphery of the photoconductive drum an eraser unit, a charging unit, a slit exposure unit, a developing unit, a transfer unit and a cleaning unit disposed within or close to the developing unit. The charging, exposure and developing units are operable during the first revolution of the photoconductive drum to form an image thereon, the cleaning unit being operable to clean the surface of the photoconductive drum during the second revolution thereof. The photoconductive drum in the course of the second revolution is adapted to rotate until the rear end of the image formed on the photoconductive drum has passed the charging unit, whereupon one copying cycle is completed. The front end of the image to be subsequently formed can be positioned on a portion of the photoconductive drum other than where the front end of the image formed during the abovementioned cycle is positioned.

REFERENCES:
patent: 3914046 (1975-10-01), Tanaka et al.
patent: 3960446 (1976-06-01), Ogawa et al.
patent: 3976375 (1976-08-01), Kurita et al.
patent: 4139300 (1979-02-01), Katayama et al.

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