Magnetic brush developing device
US3977361A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 1975 |
| Grant date | Aug 31, 1976 |
| Priority date | — |
| Expiry date | May 13, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/09
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A magnetic brush developing device including a plurality of developing rollers each consisting of a cylindrical stationary magnet and a cylindrical sleeve rotating around said magnet, said plurality of developing rollers being disposed among the surface of a latent image forming member, wherein said cylindrical stationary magnets each have (a) a developing magnetic pole positioned in a portion facing the surface of latent image forming member, (b) a transporting magnetic pole positioned rearwardly of said developing magnetic pole in the travelling direction of a developing agent and having an opposite polarity to that of the developing magnetic pole, and (c) an auxility transporting magnetic pole positioned in a portion facing the preceding developing roller in the travelling direction of developing agent and having a polarity identical with the polarity of said transporting magnetic pole, said developing magnetic poles having the identical polarity and thus delivery and receipt of the developing agent between the adjacent developing rollers is effected between the transporting magnetic pole of the preceding developing roller and the developing magnetic pole of the succeeding devel…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.