Charging and exposure section in an electrophotographic apparatu

Details Charging and exposure section in an electrophotographic apparatu Charging and exposure section in an electrophotographic apparatu

1984-05-18

1985-10-01

Moses, Richard L.

Photocopying

Including fiber optics

355 72, 250326, G03G 1504

Patent

active

045442614

ABSTRACT:
In a charging and exposure section of an electrophotographic apparatus, a charging mask defining a charge area of an electrophotosensitive member charged by a charging unit is formed with a cut-out portion which is not exposed through an objective lens focusing the image of a picture carried by an original onto the electrophotosensitive member, so as to form a retrieval mark on a portion of the electrophotosensitive member. This retrieval mark is utilized for judging the condition of exposure on the electrophotosensitive member or for facilitating the picture image quality control.

REFERENCES:
patent: 3942080 (1976-03-01), Milewski
patent: 3991311 (1976-11-01), Plumadore
patent: 4041312 (1977-08-01), Plumadore
IBM Tech. Disc. Bull., "Charge Corona Edge Shield", vol. 15, No. 7, Dec. '72, p. 2060.

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