Cleaning unit for removing residual toner on photoreceptor drum for use in image forming apparatus
US5233398A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1992 |
| Grant date | Aug 3, 1993 |
| Priority date | — |
| Expiry date | Apr 28, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2221/001
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A cleaning unit includes a plurality of rotatable fur brushes which are arranged so as to adjoin in a downstream direction of a transferring process on a surface of a photoreceptor drum and whose tips are in contact with the surface for removing residual toner on the surface, recovering rollers arranged so as to be in contact with the tip of each of the fur brushes for removing toner adhering to the fur brushes, and a charger for charging the fur brushes and the recovering rollers, wherein the fur brush arranged at the downmost stream side rotates at a lower speed compared to another fur brush arranged in the upstream side thereof, wherein a discharger is further provided for decreasing the charge of the residual toner, and wherein the charger charges the downmost stream side fur brush reversely to the uppermost stream side fur brush.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.