Developing device and image forming apparatus
US8750764B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2012 |
| Grant date | Jun 10, 2014 |
| Priority date | — |
| Expiry date | Apr 16, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0132
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A trickle-type developing device comprising: a stirring and conveying tank provided with stirring and conveying screws that circulate the developer; a discharge member via which a part of the developer is conveyed from the tank to a discharge opening through which the developer is discharged, the discharge opening being provided in the discharge member; and a reverse flow generating screw provided inside a portion of the discharge member, sharing one of rotation shafts of the stirring and conveying screws, and pushing back a part of the developer, wherein the portion has a reduced-radius part and in a cross section thereof perpendicular to an axial direction of the one of rotation shafts, an inner radius of the portion is smaller in the reduced-radius part than in the remaining part, the reduced-radius part being located in a lower part of the portion with respect to a vertical direction of the portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.