Ferrite carrier for electrophotographic developer and method for preparing the same, and electrophotographic developer using the same
US7442483B2 · kind B2 · utility
5Cited by
3References
4Claims
0Family size
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Key dates
| Filing date | Jun 28, 2005 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Aug 5, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1136
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A ferrite carrier for the electrophotographic developer containing 40 to 500 ppm of zirconium; a method for preparing a ferrite carrier for the electrophotographic developer, comprising the steps for weighing, mixing, and pulverizing ferrite raw materials, and for granulating, drying, and firing the obtained slurry; wherein a zirconium raw material is added so that the zirconium content after firing becomes 40 to 500 ppm; and an electrophotographic developer using the ferrite carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.