Changing member having a charging surface arranged with respect

Photocopying – Contact printing – Light boxes

Patent

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Details

355221, G03G 1500

Patent

active

054754712

ABSTRACT:
A charging device, for use with an image forming apparatus with a detachable process cartridge, includes a movable member to be charged, and a charging member adjacent to the movable member. An oscillating voltage is applied to the charging member. The charging member includes a charging surface at the same side as the movable member. A tangent line extends from a point on the charging member, the point being the most downstream point in a moving direction of the movable member at a closest portion between the charging member and the image bearing member, toward the downstream side in the moving direction of the movable member. The charging device may include a first charging region and a second charging region provided at a downstream side from the first charging region, wherein a peak-to-peak voltage of unevenness in charging of a potential of the first charging region is greater than a peak-to-peak voltage of unevenness in charging of a potential of the second charging region.

REFERENCES:
patent: 4380384 (1983-04-01), Ueno et al.
patent: 5206784 (1993-04-01), Kimiwada et al.
patent: 5272505 (1993-12-01), Shishido et al.

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