Developing roller, and electrophotographic process cartridge and electrophotographic image forming apparatus comprising the developing roller
US8064808B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2009 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | Aug 3, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0818
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing roller has a surface layer which can effectively inhibit the bleeding of a low-molecular-weight component from an elastic layer, and can efficiently impart a high electric charge to a negatively chargeable toner, and is excellent in toner-releasing properties. The developing roller has a mandrel, at least one layer of an elastic layer provided on the mandrel and a surface layer provided on the elastic layer, carries and conveys a toner, and develops an electrostatic latent image on an opposing photosensitive member with the toner. The surface layer comprises a silicon compound film containing Si, N, C and H having specific total amounts of the existing elements Si, N, C and H, and specific ratios N/Si, C/Si, and H/Si.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.