Electrophotographic developer
US4933251A · kind A · utility
22Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1988 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Aug 4, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09725
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrophotographic developer is described, comprising toner particles and carrier particles, characterized in that the toner particles have a layer of externally additive agents comprising fine metal oxide particles having an electric resistance of 1.times.10.sup.2 to 1.times.10.sup.9 .OMEGA..multidot.cm and fine silica particles and cleaning aid particles, and the layer of externally additive agents does not have a chain like structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.