Toner for developing electrostatic charge image and process for preparing the same
US5296324A · kind A · utility
18Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 1992 |
| Grant date | Mar 22, 1994 |
| Priority date | — |
| Expiry date | May 4, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/0827
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner for developing an electrostatic charge image is disclosed, which is formed by adding and mixing an external additive with toner particles having an average particle size of not larger than 9 .mu.m and comprising at least a colorant and a binder resin, wherein the external additive is fine particles having a particle size of 20 to 80 nm. There is also disclosed a process for preparing the toner which comprises adding external additives to the toner particles and mixing them, wherein the addition and mixing of said external additive are carried out under specific conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.