Image forming apparatus, process cartridge and cleaningless system
US7315711B2 · kind B2 · utility
14Cited by
9References
53Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2005 |
| Grant date | Jan 1, 2008 |
| Priority date | — |
| Expiry date | Feb 17, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0607
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus of includes a developing device bifunctioning as a cleaning device for collecting toner grains left on a photoconductive drum after the transfer of a toner image from the drum to a paper sheet or similar image transfer medium. In the event of toner collection, a DC voltage is applied that causes the residual toner to move from the drum toward a developing sleeve. A main-pole magnet generates, at a position where the developing sleeve faces the drum, a magnetic field of between 100 mT and 200 mT in a direction normal to the surface of the sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.