Developing device and image forming apparatus
US7421227B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2006 |
| Grant date | Sep 2, 2008 |
| Priority date | — |
| Expiry date | Nov 15, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0942
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device includes a developing sleeve for supplying toner particles to a latent image area on a peripheral surface of a photoconductive drum while rotating about an axis. The developing sleeve has a permanent magnet therein. Two magnetic members are provided in the developing device and face opposite ends of a peripheral surface of the developing sleeve at a predetermined distance from the developing sleeve. The magnetic members have arc-shaped inner surfaces. A blade is spaced a predetermined distance from a central portion of the peripheral surface of the developing sleeve. The blade adjusts the amount of toner particles supplied to the photoconductive drum. The gap between the arc-shaped inner surface of the magnetic member and the peripheral surface of the developing sleeve gradually increases from upstream to downstream in a rotational direction of the developing sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.