Liquid developer
US7566520B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2006 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | May 4, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/125
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid developer of the type that is positively-charged is provided. The liquid developer includes an insulation liquid, and toner particles dispersed in the insulation liquid, wherein each of the toner particles includes a toner matrix particle mainly made of a polyester resin and a positively-charged polymeric dispersant adhering to the surface of the toner matrix particle. The polymeric dispersant is preferably of the type that an amino group is contained in its molecule, or of the type that an ester structure is contained in its molecule. Further, the polyester resin is preferably of the type that a —SO3− group is contained in its molecule. The liquid developer has excellent positively-chargeable charging characteristics and fixing characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.