Process cartridge and electrophotographic image forming apparatus
US6963706B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2003 |
| Grant date | Nov 8, 2005 |
| Priority date | — |
| Expiry date | Apr 17, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/1867
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes a photosensitive drum; a developing roller rotatable in the drum-rotating direction when the cartridge is mounted to the apparatus; first and second separation members disposed at one and the other end of the roller so as to provide a gap between the roller and the drum and contacting the drum surface adjacent one and the other end thereof; a charging roller, contacting and charging the drum, which is rotatable with a peripheral speed difference relative to the drum; and a cleaning member contacting the drum adjacent one end thereof, the cleaning member having an effective area outside a developing-roller developing zone and inside a charging-roller-and drum contact region and which is in a region where the first separation member contacts the drum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.