Apparatus for forming image

Details Apparatus for forming image Apparatus for forming image

1992-06-15

1994-05-03

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355208, 355219, 355225, 361225, G03G 2100

Patent

active

053092074

ABSTRACT:
The picture image forming apparatus of a type which performs a light exposing on an image holding surface charged at a constant voltage by a charging device having a grid electrode to form an electrostatic latent image and then supplies a toner from a developing device to change the latent image into a visible image, including a voltage division and adjustment circuit for dividing a voltage applied to the grid electrode of the charging device and for adjusting the divided voltage to a predetermined bias voltage for the developing device, a modification and drive circuit for absorbing and modifying a fluctuation of the bias voltage which has been divided and adjusted by the division and adjustment circuit and for driving the division and adjustment circuit, and an operating circuit for operating the drive circuit.

REFERENCES:
patent: 3788739 (1974-01-01), Coriale
patent: 4678317 (1987-07-01), Grossinger
patent: 4772919 (1988-09-01), Yoshiyama et al.
patent: 5034772 (1991-07-01), Suzuki

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