Magnetic brush type developing device
US4428661A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1982 |
| Grant date | Jan 31, 1984 |
| Priority date | — |
| Expiry date | Feb 12, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/09
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A magnetic brush developing device for developing an electrostatic latent image formed on a charge retaining member includes a housing for containing developer, a developing sleeve arranged rotatably in the housing, a plurality of magnets interior of the developing sleeve, a doctor blade for regulating a thickness of a developer layer formed on a circumferential surface of the developing sleeve by a magnetic flux of the magnets, and a magnetic material fixed on an internal surface of the housing and downstream of the doctor blade as viewed from the direction of the rotation of the developing sleeve. The magnetic material extends in the direction of the width of the developing sleeve, is spaced from the circumferential surface of the developing sleeve, and is positioned opposite to at least one of the magnets arranged in the developing sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.