Method and device for supplying a variable bias voltage to a dev

Details Method and device for supplying a variable bias voltage to a dev Method and device for supplying a variable bias voltage to a dev

1994-12-08

1998-05-26

Ramirez, Nestor

Electrophotography

Control of electrophotography process

Control of developing

399 56, G03G 1508

Patent

active

057582254

ABSTRACT:
A method and a device for supplying a developing bias voltage capable of minimizing toner consumption by reducing wasted toner during a printing operation in the image forming apparatus. The image forming apparatus comprises a photosensitive drum for forming an electrostatic latent image, a charger for providing a predetermined charging voltage to the photosensitive drum such that different bias voltages are supplied to image and non-image areas, an exposure unit for forming the electrostatic latent image on the photosensitive drum by providing image data, a developing unit for developing the electrostatic latent image formed on the photosensitive drum by toner, a transfer unit for transferring the developed toner to a printing paper, and a developing bias controller.

REFERENCES:
patent: 4600294 (1986-07-01), Suzuki et al.
patent: 4755850 (1988-07-01), Suzuki et al.
patent: 4990961 (1991-02-01), Ueno et al.
patent: 5198861 (1993-03-01), Hasegawa et al.
patent: 5287149 (1994-02-01), Hoshika
patent: 5521683 (1996-05-01), Miyamoto et al.

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