Photocopying – Contact printing – Light boxes
Patent
1992-12-30
1995-12-12
Grimley, A. T.
Photocopying
Contact printing
Light boxes
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.
Asano Erika
Inami Satoru
Kisu Hiroki
Ogata Hiroaki
Sakurai Kazushige
Canon Kabushiki Kaisha
Grimley A. T.
Ramirez Nestor R.
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