Developing device and image forming apparatus
US10197948B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2015 |
| Grant date | Feb 5, 2019 |
| Priority date | — |
| Expiry date | Aug 31, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0907
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device, including: a developer containing toner and carrier; and developer bearer configured to have surface thereof bear the developer and endlessly move, and to develop latent image over surface of latent image bearer by supplying toner in developer to latent image in developing region facing the latent image bearer, wherein carrier contains fine particles, value X in volume resistivity R (=10X) (Ω·cm) of carrier is 11.5-16.0, developer bearer includes: magnetic field generating unit including a plurality of magnetic poles; and developing sleeve having a cylindrical shape enclosing magnetic field generating unit, and configured to bear developer over outer circumferential surface of cylindrical shape by magnetic force of the magnetic field generating unit and perform surface moving by rotating relative to developing device body, and developing device includes developing sleeve voltage applying unit configured to apply AC component-containing voltage to developing sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.