Magnetic brush developer
US3999514A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1975 |
| Grant date | Dec 28, 1976 |
| Priority date | — |
| Expiry date | Sep 29, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/09
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An auger fed magnetic brush developer wherein two parallel augers continuously recirculate the developer mix and cause the mix to be enriched with toner prior to its being returned to the magnetic brush roll. A supply auger communicates with the brush roll along its entire length and directly elevates the mix to a lower part of the brush roll's surface. This supply auger includes four flutes of a pitch equal to one-half the length of the brush roll. This auger flute arrangement insures that a uniform supply of mix is presented to the brush roll along its entire length. In addition, this supply auger construction insures that a uniform supply of enriched mix is presented to the brush roll along its entire length, since the gradually depleting carrier tends to be presented to the brush roll a minimum number of times, for example three, prior to its exiting one end of the supply auger. The carrier exiting the supply auger enters a turnaround compartment whereat new toner is added. The depleted carrier and new toner is mixed by a return auger. To insure adequate triboelectric agitation, the return auger includes two flutes of a pitch equal to that of the supply auger. The two augers ar…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.