Electrophotographic apparatus having cleaning device and developing device configured to prevent toner leakage
US5655178A · kind A · utility
24Cited by
12References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1995 |
| Grant date | Aug 5, 1997 |
| Priority date | — |
| Expiry date | Oct 24, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2221/1648
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device used in an electrophotographic apparatus has seal members fixedly disposed between both end portions of a developing roller and those portions of inner walls of a device casing which correspond to both end portions of the developing roller. The seal members are made of a material which can be charged by friction with the developing roller to have the same polarity as charged toner. The toner is blocked by the seal members and presented from entering end portions of the developing roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.