Developing device for suppressing variations in bulk density of developer, and an image forming apparatus including the developing device
US7003235B2 · kind B2 · utility
5Cited by
10References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 20, 2004 |
| Grant date | Feb 21, 2006 |
| Priority date | — |
| Expiry date | Oct 20, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/113
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device includes a developer including toner having a coloring agent dispersed in a binder resin, and carrier having a core material, and a coating layer covering the core material and containing a binder resin and a powder. A toner density detecting device detects a toner density of the developer by use of a bulk density sensor, and a control device controls the toner density based on a detection result of the toner density detecting device. The toner density is controlled such that ratio (D/h) of an average particle diameter (D) of the powder to a thickness of the coating layer is greater than 1 and less than 10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.