Image forming apparatus with AC current controlled contact charg

Details Image forming apparatus with AC current controlled contact charg Image forming apparatus with AC current controlled contact charg

1996-10-03

1998-02-10

Pendergrass, Joan H.

Electrophotography

Control of electrophotography process

Control of charging

399174, G03G 1502, G03G 1500

Patent

active

057179794

ABSTRACT:
An image forming apparatus includes an image bearing member; a charging member contactable the image bearing member to charge the image bearing member at a charging position; wherein an AC current applied to the charging member is constant-current-controlled when a region of the image bearing member which is going to be an image formation region is at the charging position, and wherein a current flowing through the charging member is detected when a region of the image bearing member which is going to be a non-image-formation region is at the charging position, and the AC current is determined on the basis of the detected current.

REFERENCES:
patent: 5144368 (1992-09-01), Ohzeki et al.
patent: 5305177 (1994-04-01), Aoki et al.
patent: 5420671 (1995-05-01), Kisu et al.
patent: 5485248 (1996-01-01), Yano et al.
patent: 5508788 (1996-04-01), Watanabe et al.

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