Developing device and image forming apparatus
US9372439B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2015 |
| Grant date | Jun 21, 2016 |
| Priority date | — |
| Expiry date | Feb 4, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/09
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device includes a developing member, a toner supplying member, and a carrier recovering member configured to recover magnetic carrier particles from the toner supplying member. An outer surface of the toner supplying member includes a plurality of protrusion portions with a regular interval between adjacent protrusion portions. The regular interval is equal to or larger than a particle diameter of a toner particle having an average particle diameter from among the particle diameters of the toner particles and smaller than a carrier particle diameter of a magnetic carrier particle having an average particle diameter from among the particle diameters of the magnetic carrier particles. The protrusion portions protrude from the remainder of the outer surface of the toner supplying member with a height that is smaller than the average particle diameter of the toner particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.