Dual-component magnetic brush developing device
US5752139A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1996 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Nov 25, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0609
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A dual-component magnetic brush developing device using a dual-component developer containing magnetic carriers and toner electrically attracted to the magnetic carriers. The dual-component magnetic brush developing device comprises: a magnetic field generation member being formed with a plurality of magnetic poles almost equally spaced from each other on a peripheral surface; a developer transport member being supported outside the magnetic field generation member for circumferential rotation and moving together with the magnetic field generation member at least in a developing area facing the image carrier in the proximity thereof; toner supply means for supplying an excess of new toner to magnetic carriers supported on the developer transport member and passing through the developing area; magnetic field reduction unit for reducing a magnetic field strength in the vicinity of a surface of the developer transport member by an agitation section for agitating the developer to which the excessive toner is supplied; and excessive toner separation unit being disposed downstream from the agitation section in a circumferential rotation direction of the developer transport member for sep…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.