Electrostatic image developer
US10698329B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2019 |
| Grant date | Jun 30, 2020 |
| Priority date | — |
| Expiry date | Apr 30, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1139
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is an electrostatic charge image developer containing toner particles and carrier particles, wherein the toner particles contain at least silica particles or alumina particles as an external additive; the carrier particles contain core material particles and a coating resin layer covering a surface of the core particles; the coating resin layer contains metal oxide particles; an element measured by XPS (photoelectron spectroscopy) of the carrier particle is at least Si or Al; and a content of Si or Al in the carrier particle is in the range of 1 to 6 at % with respect to the total elements constituting the carrier particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.