Charging member
US8501312B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2012 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Feb 13, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31931
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
To provide a charging member that can not easily change in electrical resistance even by any long-term continuous application of direct-current voltage and, as a result thereof, may cause less change in its charging performance with time. The charging member has an electrically conductive support and an electrically conductive elastic layer. The elastic layer contains a vulcanized rubber. The vulcanized rubber is a vulcanized product of a mixture which contains i) a binder polymer containing a polymer having a butadiene skeleton and ii) carbon black, where the polymer having a butadiene skeleton stands modified at the molecular terminal(s) thereof with a group represented by the following formulas (1) or (2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.