Toner for developing electrostatic image, developer for electrostatic image, toner cartridge, process cartridge, and image forming apparatus
US9389581B2 · kind B2 · utility
0Cited by
9References
20Claims
0Family size
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Key dates
| Filing date | May 20, 2011 |
| Grant date | Jul 12, 2016 |
| Priority date | — |
| Expiry date | Sep 27, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0865
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner for developing an electrostatic image, including: toner particles containing at least a binder resin, a release agent, and a colorant; and an external additive having a volume average particle diameter (d) of from 70 nm to 400 nm, a ratio (d/σ) of the volume average particle diameter (d) to a standard deviation (σ) of a volumetric basis particle diameter of from 2.0 to 12, and an average circularity of from 0.5 to 0.9.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.