Patent · US Expired

Magnetic brush developing station

US4461238A · kind A · utility

9Cited by

7References

6Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Erich Baier · Schweitenkirchen, DE
Rainer Koefferlein · Munich, DE
Bernhard Schlageter · Ottobrunn, DE

Key dates

Filing date	May 6, 1982
Grant date	Jul 24, 1984
Priority date	—
Expiry date	May 6, 2002

Classification

Technology area (CPC G)Physics
CPC primaryG03G15/09
WIPO fieldOptics
WIPO sectorInstruments

Abstract

In a developer station for an electrophotographic printing or copying machine, there is provided apparatus which affords effective intermixing of carrier and toner particles in the developer mix and which enables the developer mix to be removed from the station prior to replacement in an automatic and simplified fashion. Transport and developer rollers are mounted in the station for conducting developer mix from a supply chamber to communication with a charge image carrier. A pair of rotary screws are disposed in the station on one side of the rollers with conveyance directions opposite to one another for conducting developer mix back and forth through the station enabling fresh toner to blend into the developer mix and maintaining uniform mixing of toner and carrier particles of the mix. On the other side of the developer roller from the mixing screws, there is provided a guide plate assembly which receives developer mix spilled off the top of the developer drum after passing by the image carrier and conducts this spilled-off mix laterally through the housing toward one end of the housing. At this one end of the housing there is provided a discharge opening in the housing floor un…

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.