Developer composition and method of preparing the same
US5422216A · kind A · utility
11Cited by
34References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1994 |
| Grant date | Jun 6, 1995 |
| Priority date | — |
| Expiry date | Mar 1, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1075
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for preparing the carrier for a developer composition is provided. The method comprises subjecting a ferric oxide and a metal oxide to conditions sufficient to form a ferrite have a spinel structure, mixing the ferrite having a spinel structure with a sintering agent, and sintering in the liquid phase the mixture at temperature conditions of less than about 1375.degree. C. to provide a ferrite carrier devoid of zinc, copper, or nickel in its crystal structure. The ferrite carrier cab be used in a developer composition comprising the ferrite carrier and a toner composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.