Developing device and image forming apparatus using the same
US8270882B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2010 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Jan 7, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0838
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a developing device including a developing vessel for storing a developer, a first conveying passage, a second conveying passage, a first conveying member, a second conveying member and a developing roller, the first conveying member has a first rotary shaft and a first conveying blade formed on the periphery of the first rotary shaft, the first conveying blade has a first inner helical blade formed on the periphery of the first rotary shaft and a first outer helical blade arranged along the axis of the first rotary shaft and radially outside the outer periphery of the first inner helical blade, and the helical pitch of the first outer helical blade is specified to be shorter than the helical pitch of the first inner helical blade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.