Electrophotographic reproducing machine

Details Electrophotographic reproducing machine Electrophotographic reproducing machine

1982-08-25

1984-09-04

Truhe, J. V.

Photocopying

Including fiber optics

118647, G03G 1309, G03G 1500

Patent

active

044694296

ABSTRACT:
An electrophotographic reproducing machine in which the bias voltage applied to the sleeve is set at such a level as to substantially nullify the developing current which is produced as a result of induction of charge in the developer in accordance with the potential of the electrostatic latent image when the document is a blank. The setting of the bias voltage is made in accordance with an electrostatic latent image formed as a result of the projection of a leading projecting portion provided on a document glass plate in contact with the document mounting position, the projection of the leading projecting portion being made in advance to the projection of the image on the document to form the electrostatic latent image of a potential substantially equal to that corresponding to the blank portion of the document.

REFERENCES:
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patent: 4256401 (1981-03-01), Fujimura et al.
patent: 4314755 (1982-02-01), Kinashi
patent: 4352553 (1982-10-01), Hirahara
patent: 4376813 (1983-03-01), Yuge et al.

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