Image forming unit and image forming apparatus comprising first process roller and second process roller
US9176456B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2014 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Jul 30, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0225
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming unit includes a charging roller, a cleaning roller, a bush member, and a shifting mechanism. A first journal portion of the bush member allows the charging roller to shift in a direction of abutment against and separation from a photosensitive drum and journals the charging roller with play in the direction of abutment and separation when the charging roller is free from nip with the photosensitive drum. When the charging roller forms a nip with the photosensitive drum by the movement of the bush member actuated by the shifting mechanism, the first journal portion journals the charging roller so that the charging roller is pressed by the photosensitive drum to shift to a position within the first journal portion close to the cleaning roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.