Contact charging member, image forming unit including the contac

Details Contact charging member, image forming unit including the contac Contact charging member, image forming unit including the contac

1998-04-21

1999-12-07

Grimley, Arthur T.

Electrophotography

Image formation

Charging

G03G 1502

Patent

active

059997761

ABSTRACT:
A roller-shaped contact charging member which is in contact with and electrically charges a photosensitive drum is provided on a center shaft, and includes a roller-shaped conductive foam material portion covering the shaft, and a tubular-shaped conductive resin material portion covering the foam portion. The foam portion has an electric resistance of 9.times.10.sup.5 .OMEGA. or less, the resin portion includes conductive agents and has a surface electric resistance in a range from 1.times.10.sup.5 .OMEGA./.quadrature. or more to 9.times.10.sup.7 .OMEGA./.quadrature. or less, and a hardness of the charging roller as a whole is Asker F 90.degree. or less. An image forming unit includes the charging member and the drum. An electrophotographic image forming apparatus supplies a recording paper to the unit, transfers an image from the drum to the paper, and discharges the image-transferred paper.

REFERENCES:
patent: 5294962 (1994-03-01), Sato et al.
patent: 5402213 (1995-03-01), Ikegawa et al.
patent: 5713067 (1998-01-01), Mizoe et al.

Affiliated with

Also associated with

Rating

Contact charging member, image forming unit including the contac does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Contact charging member, image forming unit including the contac, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Contact charging member, image forming unit including the contac will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-834650