Reverse development electrophotographic apparatus and image form

Details Reverse development electrophotographic apparatus and image form Reverse development electrophotographic apparatus and image form

1988-07-21

1990-11-27

Moses, R. L.

Photocopying

Contact printing

Light boxes

355221, G03G 1500

Patent

active

049740261

ABSTRACT:
An electrophotographic apparatus comprising a photosensitive member, charging means for providing a surface potential to the surface of the photosensitive member, image exposure means for exposing the photosensitive member to form an electrostatic latent image which comprises an unexposed dark part and a exposed light part, developing means including a developer-carrying member for providing a toner to the light part thereby to develop the latent image with the toner and bias application means for applying a bias voltage between the developer-carrying member and the photosensitive member surface to control a developing condition; the apparatus further comprising image regulation means for changing the surface potential in the dark part (Vd) in association with the change in DC component (V.sub.DC) of the bias voltage.

REFERENCES:
patent: 4200387 (1980-04-01), Masumura
patent: 4248524 (1981-03-01), Takahashi
patent: 4511240 (1985-04-01), Suzuki et al.
patent: 4780744 (1988-10-01), Porter et al.

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