Developing device with an auger roller for providing a fresh and consistent stream of developer in an image forming apparatus
US5867756A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 1997 |
| Grant date | Feb 2, 1999 |
| Priority date | — |
| Expiry date | May 22, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0841
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device for use in an image forming apparatus is constructed such that a pair of upper and lower auger rollers 35 and 34 are arranged in the vicinity of a toner supply port 21A, thereby to transport toner from the toner supply port 21A through a spiral tooth 34A of the lower auger roller 34 toward both ends of the supply roller 20 and from the both ends through a spiral tooth 35A toward the toner supply port 21A, thus circulating toner above the toner supply roller 20 in its both side directions, and that a position of the toner supply port 21A of a toner cartridge 21 corresponds to respective center positions 35C and 34C of the upper and lower auger rollers 35 and 34.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.