Charging method and charging device

Details Charging method and charging device Charging method and charging device

1997-07-08

1999-01-12

Pendegrass, Joan H.

Electrophotography

Image formation

Charging

361225, 430902, G03G 1502

Patent

active

058600469

ABSTRACT:
The present invention provides a contact charging device, in which a contact member for charging is in contact with a charge receiving member for charging the same while suppressing charging irregularity. The contact member has a surface to be in contact with the charge receiving member. This surface has a volume resistivity in a range from 1.times.10.sup.4 .OMEGA..multidot.cm to 1.times.10.sup.10 .OMEGA..multidot.cm, and has a surface resistivity in a range from 1.times.10.sup.5 .OMEGA./.quadrature. to 1.times.10.sup.10 .OMEGA./.quadrature..
Alternatively, the contact member has a surface to be in contact with the charge receiving member. This surface of the contact member has a surface hardness which provides a scratch width of 1 .mu.m or less under scratch hardness test.

REFERENCES:
patent: 5357322 (1994-10-01), Hoshika
patent: 5402213 (1995-03-01), Ikegawa et al.
patent: 5504561 (1996-04-01), Ikegawa et al.

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