Developing device and image forming apparatus
US8139990B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2009 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Jun 10, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0866
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device including a housing, toner a developing roller, and a feed roller in pressure contact with the developing roller so as to form a nip portion and which feeds toner to the developing roller. The developing device including a feed stabilizing member contacting a lower portion of the feed roller so as to form a second nip portion and restricting toner feed quantity. The feed stabilizing member extending from a generally triangular-shaped first region below the first nip portion up to one side of the nip portion opposite to the first region side. The developing device further including a toner circulation path for pushing back toner from the first region through below the feed stabilizing member to a second region on the one side opposite to the first region side with an aid of pressure of toner that tends to accumulate in the first region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.