Bias device for a copying machine

Details Bias device for a copying machine Bias device for a copying machine

1979-06-20

1981-01-27

Moses, R. L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

118647, 355 10, G03G 1500

Patent

active

042471958

ABSTRACT:
In a bias device for a copying machine, the surface potential of the photo-sensitive member is detected and stored, a bias voltage is obtained by superposing a certain potential on the potential thus stored, the surface potential of an electrode confronting the photo-sensitive member is stored in a non-image period occurring with the photo-sensitive member, and the bias voltage is applied to the electrode in an image development period occurring with the photo-sensitive member, whereby troubles due to the residual voltage of the photo-sensitive member are effectively overcome.

REFERENCES:
patent: 3782818 (1974-01-01), Smith
patent: 3892481 (1975-07-01), Schaefer et al.
patent: 4006709 (1977-02-01), Miyakawa et al.
patent: 4035071 (1977-07-01), Miyakawa et al.
patent: 4050806 (1977-09-01), Miyakawa et al.
patent: 4052127 (1977-10-01), Kuroishi et al.
patent: 4087171 (1978-05-01), Yano
patent: 4168329 (1979-09-01), Miyakawa et al.
patent: 4176942 (1979-12-01), Tatsumi et al.

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