Charging device and image forming apparatus

Details Charging device and image forming apparatus Charging device and image forming apparatus

1991-11-01

1994-04-19

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Electric charging of objects or materials

355219, 361220, G03G 1500

Patent

active

053051777

ABSTRACT:
A charging device includes a charging member contactable to a member to be charged. A bias source includes an AC source and a DC source and is effective to apply a bias voltage to the charging member. The bias voltage is provided by a superposing a constant current controlled AC voltage and a constant voltage controlled DC voltage. When a DC voltage is applied between the charging member and the member to be charged, the following equation is satisfied.

REFERENCES:
patent: 4727453 (1988-02-01), Ewing
patent: 4851960 (1989-07-01), Nakamura et al.
patent: 5144368 (1992-09-01), Ohzeki et al.
patent: 5146281 (1992-09-01), Kisu
patent: 5164779 (1992-11-01), Araya et al.

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