Carrier for electrophotographic developer and electrophotographic developer containing the same
US6582870B2 · kind B2 · utility
1Cited by
4References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 15, 2002 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | Jan 15, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1132
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A carrier for an electrophotographic developer comprising spherical magnetic core particles which have a volume average particle size of 25 to 45 &mgr;m, an average void size of 10 to 20 &mgr;m, a volume based particle size distribution having less than 1% of 22 &mgr;m or smaller particles, a magnetization of 67 to 88 emu/g in a magnetic field of 1 kOe, and a difference of 10 emu/g or smaller in magnetization in a magnetic field of 1 kOe between scattered particles and remaining particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.