Electrostatic charge image developer, image formation method and image forming device
US6001527A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1997 |
| Grant date | Dec 14, 1999 |
| Priority date | — |
| Expiry date | Dec 19, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/113
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides an electrostatic image developer comprising a toner and a carrier wherein the toner includes toner particles having an average particle diameter of 3 to 9 .mu.m, a hydrophobic silica microparticles having a BET specific surface area of 40 to 120 m.sup.2 /g, and a hydrophobic titanium compound microparticles having a BET specific surface area of 40 to 250 m.sup.2 /g; and wherein the carrier is a resin coated carrier having a coating layer of a resin. The electrostatic image developer can improve the environmental dependency of charging, power fluidity, resistance to caking of a toner and reduced change in charging with time course to provide an image with an excellent image quality for a long period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.