Charging device, process cartridge and image forming apparatus

Photocopying – Contact printing – Light boxes

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Details

355200, 361225, G03G 1502

Patent

active

055461670

ABSTRACT:
A charging member has a charging surface having a concave surface that is positioned on the opposite side of a line H than a side at which an object to be charged is disposed, wherein H is a line that (i) is tangent to a surface of the object to be charged at a point at a downstream end of a contact section or a closest-proximity section between the charging surface and the object to be charged, and (ii) extends downstream from the point of tangency, where the downstream direction is determined with respect to a direction of movement of the object to be charged. By this arrangement, a charging region can be enlarged and periodic fluctuations in a surface potential of the object to be charged can be mitigated.

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patent: 5144368 (1992-09-01), Ohzeki et al.
patent: 5150157 (1992-09-01), Yamaki
patent: 5177534 (1993-01-01), Kisu et al.
patent: 5192974 (1993-03-01), Ikegawa et al.
patent: 5243387 (1993-09-01), Ikegawa

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