Developer carrier, developing device using the developer carrier, and process cartridge using the developer carrier
US7361400B2 · kind B2 · utility
15Cited by
4References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2006 |
| Grant date | Apr 22, 2008 |
| Priority date | — |
| Expiry date | Aug 11, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developer carrier is capable of stably charging a toner over a long term without change in physical surface shape and composition. The developer carrier has at least a substrate and resin coating layer formed on a surface of the substrate. The resin coating layer includes at least graphitized particles (i) with a degree of graphitization p(002) of 0.20 to 0.95 and an indentation hardness HUT [68] of 15 to 60 or graphitized particles (ii) with a degree of graphitization p(002) of 0.20 to 0.95 and an average circularity SF-1 of 0.64 or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.