Core material for resin-filled ferrite carrier and ferrite carrier for electrophotographic developer, and electrophotographic developer using the ferrite carrier
US9201328B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Mar 19, 2014 |
| Grant date | Dec 1, 2015 |
| Priority date | — |
| Expiry date | May 8, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1132
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed are a resin-filled ferrite carrier core material for an electrophotographic developer, including a porous ferrite particle having an average compression strength of 100 mN or more and a coefficient of variation of the compression strength of 50% or less, a ferrite carrier obtained by filling a resin in the voids of the ferrite carrier core material, and an electrophotographic developer using the ferrite carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.