Developing device and image forming apparatus
US9098014B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2014 |
| Grant date | Aug 4, 2015 |
| Priority date | — |
| Expiry date | Aug 14, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0818
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device includes a developing agent bearing member and a regulating member. The developing agent bearing member bears on a surface thereof a developing agent including colored particles and additive particles disposed on the surface of the colored particles. The surface of the developing agent bearing member includes first and second dielectric portions. The regulating member regulates the thickness of a layer of developing agent borne by the developing agent bearing member. In triboelectric series, the first dielectric portion is between the regulating member and the additive particles, the additive particles are between the first dielectric portion and the second dielectric portion, and the second dielectric portion is between the additive particles and the colored particles. The difference between the work functions of the colored particles and second dielectric portion is smaller than that between the second dielectric portion and additive particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.