Developing compositions for electrophotography
US5290652A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1992 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Oct 28, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1085
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An object of the present invention to provide novel developing compositions for use in electrphotography which do not cause an adherence of ferrite carriers to the surface of a photoconductor while maintaining high definition and high picture quality of the picture image by using fine size ferrite carriers. The aforementioned developing compositions for use in elecrophotography comprise toners which contain a binding resin and colorant as main components, and ferrite carriers comprised of 5 to 40 mol % of ZnO and 60 to 95 mol % of Fe.sub.2 O.sub.3, and possess a saturated magnetization value of 70 to 100 emu/g in an applied magnetic field of 3000 oersted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.