Charging device and image forming apparatus

Patent metadata

Field	Value
Publication number	US-8948657-B2
Application number	US-201314075109-A
Country	US
Kind code	B2
Filing date	Nov 8, 2013
Priority date	Jul 2, 2012
Publication date	Feb 3, 2015
Grant date	Feb 3, 2015

Abstract

To provide a charging device and an image forming apparatus that can restrict generation of a winding-seam irregularity of a roll brush for a long period. A charging device 2 is configured so that, when first and second charging members 21 a and 21 b perform charging processing on a rotating photosensitive member 3 , a region 40 a on a surface of the photosensitive member 3 facing a winding seam 35 a , which is a seam of a base cloth 31 serving as a base material of the first charging member 21 a , is not superposed on a region 40 b on the surface of the photosensitive member 3 facing a winding seam 35 b , which is a seam of a base cloth 31 serving as a base material of the second charging member 21 b.

First claim

The invention claimed is:

1. A charging device configured to electrically charge a rotatable photosensitive member, comprising:
a first charging member formed by winding a base material, which is provided with conductive fibers in a brush-like form, around an outer peripheral surface of a core material, the first charging member being rotatable while the conductive fibers contact the photosensitive member;
a second charging member formed by winding a base material, which is prov…

Assignees

• Canon Kk

Inventors

• Toyonori Masatsugu
• Matsumoto Ryota
• NARUMI Yuki
• Hashimoto Koichi

Classifications

• G03G15/0233 Primary

  Physics · mapped topic

• G03G15/0216 Primary

  Physics · mapped topic