Image forming apparatus

Details Image forming apparatus Image forming apparatus

1989-09-27

1991-03-26

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355208, 355219, 355276, G03G 1502

Patent

active

050033506

ABSTRACT:
An image forming apparatus has a charger; developing device; transferring device; and cleaning device which are positioned around a photoreceptor, the cleaning device and charger being integrally formed. The charger has a control unit for controlling the surface potential of the photoreceptor to be at a predetermined level in accordance with the number of rotations, or the rotating time of the photoreceptor, and/or is designed such that a predetermined voltage is applied to the cleaning device. With the above arrangement, reproduced images having constant quality can be provided for long even if the photoreceptor is repeatedly used and discharging by the charger toward the photoreceptor can be stabilized. The advantages contribute to producing small-sized and low-priced image forming apparatus.

REFERENCES:
patent: 4105324 (1978-08-01), Seil
patent: 4402591 (1983-09-01), Nakahata
patent: 4500195 (1985-02-01), Hosono
patent: 4695723 (1987-09-01), Minor
patent: 4831415 (1989-05-01), Kasuya
patent: 4839670 (1989-06-01), Snelling
patent: 4862209 (1989-08-01), Sakamoto et al.
IBM Technical Disclosure Bulletin, vol. 15, No. 1, Jun. 1972, p. 91, Branham, C. E., Hunter, M. A., "Negative Corona Control".

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