Image forming apparatus with control over developing unit during an idle running of an intermediate image transfer body
US6226481A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1999 |
| Grant date | May 1, 2001 |
| Priority date | — |
| Expiry date | Dec 6, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0177
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus of the present invention includes a revolver type developing unit rotatably mounted on an apparatus body and having a plurality of developing sections, and an intermediate image transfer body having an endless movable surface to which a toner image is transferred from an image carrier. While the intermediate image transfer body is caused to run idle, the apparatus allows a minimum of toner apt to contaminate the background of a recording medium to be transferred from the developing section located at a developing position to the image carrier. Particularly, the apparatus frees the recording medium from contamination in the form of a band extending in the widthwise direction of the medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.