Developing roller, electrophotographic process cartridge, and electrophotographic image forming apparatus
US7099613B2 · kind B2 · utility
5Cited by
11References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2004 |
| Grant date | Aug 29, 2006 |
| Priority date | — |
| Expiry date | Oct 8, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0861
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a developing roller having a shaft member, a conductive elastic layer provided on the shaft member, and a conductive resin layer constituting a most-surface layer, the conductive resin layer contains a condensed polycyclic organic pigment as exemplified by at least one selected from the group consisting of a quinacridone pigment, a threne pigment, a perylene pigment and a perinone pigment. The developing roller can effectively keep ghosts from occurring and can achieve high image density in a low-temperature and low-humidity environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.