Developing roll device of an electrophotographic processor for preventing frictional erosion of the developing roll in surface portions thereof
US5995792A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 16, 1998 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Jan 16, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0863
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing roller for use in an image forming apparatus using an electrophotographic process. The image forming apparatus includes a photosensitive drum having a transcribing roller cleaning device; the developing roller disposed between a transcribing device and an exposing device adjacent to the photosensitive drum, for frictionally charging toner at a place where the developing roller contacts with a supply roller and transferring the charged toner to a developing region so as to attach the charged toner to a latent image formed on the photosensitive drum; a regulating blade disposed between the developing region and the supply roller, for regulating a toner layer on the developing layer into a thin toner layer, being in contact with the developing roller; the supply roller in contact with the developing roller, for frictionally charging the toner transferred into a contact nip by a relative motion therebetween; and an agitator for transferring the toner in a toner cartridge to the supply roller. The developing roller includes a body corresponding to a image region; end parts corresponding to a non-image region; a shaft for transferring a driving force and maintaining strength…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.