Developing device and image forming apparatus
US9366988B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2015 |
| Grant date | Jun 14, 2016 |
| Priority date | — |
| Expiry date | Jan 15, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0921
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device configured to develop an electrostatic image includes a developing member and a carrier recovering member. An outer surface of the developing member includes a plurality of protrusion portions which extend in a direction intersecting a toner particle carrying direction and are aligned 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 toner particles and smaller than a carrier particle diameter of a magnetic carrier particle having an average particle diameter from among the magnetic carrier particles. The protrusion portions protrude from the outer surface of the developing member with a height that is smaller than the average particle diameter of the toner particles, and the developing member contacts with the image bearing member at a developing portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.