Charging device, process unit, image forming apparatus, and...

Details Charging device, process unit, image forming apparatus, and... Charging device, process unit, image forming apparatus, and...

2005-10-05

2009-06-23

Gray, David M. (Department: 2852)

Electrophotography

Image formation

Charging

C361S221000, C492S039000

Reexamination Certificate

active

07551879

ABSTRACT:
An image forming apparatus has a latent image supporting body configured by a substrate and a covering layer provided on the substrate; and a charging device which is a rotating body configured by an axis member and a charging member provided on the axis member, and which charges the latent image supporting body facing the charging member. In this image forming apparatus, a value, which is obtained by dividing a capacitance [pF] between the axis member in the rotating body and the substrate in the latent image supporting body by the length [mm] in the direction perpendicular to the direction of the surface migration of the charging member, is set to be at least 0.35 [pF/mm], the capacitance being obtained when, instead of the latent image supporting body, the substrate in the latent image supporting body is caused to face the charging member.

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