Conductive roll
US6283904A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2000 |
| Grant date | Sep 4, 2001 |
| Priority date | — |
| Expiry date | Mar 27, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0233
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A conductive roll sequentially has a conductive layer of an elastic material, a resistance adjusting layer, and a protective layer which are formed on an outer periphery of a shaft. The resistance adjusting layer is formed from a composition containing 10 to 150 parts by weight of an electron conductive agent, not more than two parts by weight of an ion conductive agent and 20 to 80 parts by weight of an insulating filler, relative to 100 parts by weight of nitrile rubber, or nitrile rubber hydride as a base material. The roll has a properly controlled environment dependence of its electric resistance, and avoids any trouble, such as enlarged picture defects, when employed in an electrophotographic process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.