Toner and image forming method
US6183927A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1999 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | Jun 23, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09791
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrophotographic toner is formed of toner particles each comprising at least a binder resin, a colorant and a release agent, and a low-crystalline aromatic metal compound present at surfaces of the toner particles. The toner has an average circularity of at least 0.955, and the low-crystalline aromatic metal compound has an X-ray diffraction characteristic free from peaks exhibiting a measurement intensity of at least 10000 cps and a half-value half-width of at most 0.3 deg. in a range of measurement angles 2.theta. of 6 to 40 deg. Because of the low crystallinity, the aromatic metal compound is uniformly applied onto the toner particle surfaces to stabilize the chargeability and transferability of the toner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.