Charging apparatus and electrophotographic apparatus
US5940662A · kind A · utility
8Cited by
7References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1997 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Feb 14, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/022
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A charging apparatus which comprises an electrophotographic photosensitive member and a charging member which comprises magnetic particles and placed in contact with the electrophotographic photosensitive member to charge the electrophotographic photosensitive member upon application of a voltage, wherein each magnetic particle has a surface layer containing a polyolefin resin of which weight average molecular weight is 10,000 or more, and has a volume resistivity of 1.times.10.sup.4 to 1.times.10.sup.11 .OMEGA.cm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.