Developing device for an image forming apparatus
US5809386A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 24, 1996 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | Dec 24, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0808
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In an image forming apparatus, a developing device includes an upper and a lower feed roller intervening between a developing roller and a toner hopper and contacting the developing roller. The upper and lower feed rollers feed toner to the developing roller. The two rollers rotate in opposite directions to each other in order to move the toner existing therebetween from the hopper side to the developing roller side. The device is capable of forming a laminate developer layer of uniform charge and uniform thickness on the developer carrier, and eliminating the need for a seal member between a casing and the developer carrier or simplifying its configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.