Toner, developer and image forming apparatus
US7736826B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2008 |
| Grant date | Jun 15, 2010 |
| Priority date | — |
| Expiry date | Sep 17, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/0819
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner composition including toner particles including at least a binder resin; and a colorant, wherein the toner composition satisfies at least one of the following relationships (1) and (2):B≦14 when 155<A≦180; andB≦0.6A−79 when 145≦A≦155, (1)wherein A represents a shape factor SF-1 of the toner composition and B represents a content of toner particles having a particle diameter not greater than 3 μm; andB≦14 when 0.920≦A′≦0.950; andB≦394−400A′ when 0.950<A′≦0.965 (2)wherein A′ represents an average circularity of the toner composition and B represents a content of toner particles having a particle diameter not greater than 3 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.