Process cartridge and electrophotographic image forming apparatus
US8139972B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2009 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Jul 3, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/1871
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus includes an electrophotographic photosensitive drum, a developing roller, a developer accommodator including two frames two end portion members, supporting the roller, a first member providing an electrostatic capacity between itself and the roller when a developing bias voltage is applied to the developing roller, and a second member including a contact portion elastically contacting to a bent portion of the accommodator, and a first electrical contact portion, electrically connected to the contact portion, for transmitting, to the main assembly, an electric signal corresponding to a value of the electrostatic capacity provided between the developing roller and the first member. The second member is mounted to one end portion member such that the contact portion is inside the one end portion member and the first electrical contact portion is outside the one end portion member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.