Image forming apparatus having developer with opposite polarity particles
US7761040B2 · kind B2 · utility
1Cited by
9References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 24, 2007 |
| Grant date | Jul 20, 2010 |
| Priority date | — |
| Expiry date | May 5, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0607
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing unit using a two-component developer intended to provide an image forming apparatus capable of forming a high-quality image for a long period of time. A developing unit using a developer contains toner, carrier and opposite polarity particles having a polarity opposite to the charging polarity of toner includes separation means for separating the toner or opposite polarity particles, and control mechanism for controlling opposite polarity particle separation ratio in response to the image area ratio and the number of prints.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.