Sleeve rotation-feed apparatus, developing apparatus, image formation apparatus, and fixation apparatus
US6324366A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2000 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | May 11, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0636
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A drive roller is rotated and a high voltage periodically alternating between plus and minus based on the potential of a conductive portion of the drive roller 2 is applied by a high voltage power source 4 to an electric charger, so that the surface of the drive roller 2 is charged plus and minus alternately. Since the drive roller 2 is charged, a sleeve 1 is absorbed to and held by the drive roller 2 so as to be rotated and fed together with the drive roller. Moreover, the sleeve 1 is separated from the drive roller 2 by a separator so as to obtain a sag. When the drive roller rotates further, the sleeve 1 is again absorbed to and held by the drive roller 2 charged periodically plus and minus, so as to be rotated together with the drive roller. Thus, the present invention eliminates scratches which may be caused by friction on a developing roller or on a photosensitive body surface and also eliminates contamination with oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.