Magnetic brush developing device for use in electrophotographic copying apparatus
US4026241A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1975 |
| Grant date | May 31, 1977 |
| Priority date | — |
| Expiry date | May 23, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/09
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A magnetic brush developing unit for an electrophotographic reproducing apparatus, the brush element being a nonmagnetic sleeve rotating around fixed magnets, together with a first agitator providing both lateral and progressive mixing of depleted developer (with addition of toner, if necessary) as it leaves the magnetic brush via a scraper blade, a second agitator for additional mixing of the freshened developer and for conveying same to a roll with axial channels on its surface. The channels supply the freshened developer to the sleeve to form a new brush for another pass at a photoconductor having the same or another latent image on it. All adjacent rotating members turn in particular directions to assist circulation of developer and to enhance efficiency of agitation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.