Electrophotographic developing member, process for its production, electrophotographic process cartridge and electrophotographic image forming apparatus
US7798948B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2009 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Jul 31, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49563
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
To provide an electrophotographic developing member which can both be kept from the sticking of a developer and be kept from being deformed by its contacting members, and can form stable images over a long period of time. An electrophotographic developing member characterized in that its surface layer satisfies the following expressions (1) to (3) where the average crosslinking density in each region of up to 100 nm in depth, from 100 nm to 200 nm in depth and from 200 nm to 300 nm in depth from the surface of the surface layer is represented by C1, C2 and C3 (mol/cm3), respectively:C3<C2<C1; (1)C3×1.3≦C1≦C3×5.0; and (2)2.0×10−4≦C3≦7.0×10−4. (3)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.