Color image forming apparatus which accelerates or decelerates the developing sleeves at a constant rate
US5321475A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1993 |
| Grant date | Jun 14, 1994 |
| Priority date | — |
| Expiry date | Jan 28, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0126
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A color image forming apparatus has a plurality of developing units each including a developing sleeve and storing a developer of particular color. The developing sleeve is located to face a photoconductive element or similar image carrier. When the supply of the developer from the developing sleeve to the image carrier begins or ends, a magnet brush formed on the sleeve by the developer is slowly brought into or out of contact with the image carrier. As a result, a load acting on the image carrier due to the brush contacting it is slowly applied and cancelled. This eliminates changes in the moving speed of the image carrier and thereby insures desirable image quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.