Developing device and image forming apparatus including the same
US8559854B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2011 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Nov 3, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0822
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device includes: a developing container partitioned into a stirring-transport chamber, a supplying-transport chamber, and a collecting-transport chamber; a developer carrying member for carrying the developer on a surface thereof; a supplying-transport member located within the supplying-transport chamber; a stirring-transport member located within the stirring-transport chamber, for stirring and transporting the developer in a reverse direction to the supplying-transport member; a collecting-transport member located within the collecting-transport chamber, for stirring and transporting the developer in the same direction as the supplying-transport member; a first developer passage for passing the developer from the stirring-transport chamber to the supplying-transport chamber; a second developer passage for passing the developer from the supplying-transport chamber to the stirring-transport chamber, in which a communication portion for passing the developer from the collecting-transport chamber to the supplying-transport chamber is provided on an upstream side of the second developer passage in terms of a developer transporting direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.