Electrophotographic apparatus having developing device with seals for preventing toner leakage
US5488462A · kind A · utility
36Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1994 |
| Grant date | Jan 30, 1996 |
| Priority date | — |
| Expiry date | Jun 10, 2014 |
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 prevented from entering end portions of the developing roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.