Developing device
US5812909A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1997 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Jul 30, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0942
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device includes a container for containing a magnetic developer therein, a developer carrier for carrying and conveying the magnetic developer in the container, a magnetic member for forming a magnetic seal area of a predetermined gap with respect to the surface of the developer carrier in the end portions of the developer carrier along the circumferential direction of the developer carrier. The magnetic member has a plurality of magnetic poles along the circumferential direction of the developer carrier in the magnetic seal area, and an external magnetic pole provided outside the endmost magnetic pole forming the magnetic seal for conveying a magnetic flux travelling from the endmost magnetic pole toward the outside of the magnetic seal area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.