Toner, process for producing toner image forming method and apparatus unit
US6703176B2 · kind B2 · utility
31Cited by
16References
39Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 2002 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | May 23, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/0819
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner contains at least a bonding resin and a coloring agent, and has a weight mean particle size from 5 &mgr;m to 12 &mgr;m; not less than 90% by number of particles not less than 3 &mgr;m have a circularity “a” not less than 0.900; a cut ratio Z and a weight mean size X of the toner are related as: cut ratio Z≦5.3×X; and a relationship of particles Y having a circularity of not less than 0.950 and a weight mean size X is Y≧e5.51×X−0.645 where X is 5 to 12 &mgr;m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.