G - Physics – 03 – G
Patent
G - Physics
03
G
G03G 15/09 (2006.01) G03G 13/09 (2006.01) G03G 15/08 (2006.01)
Patent
CA 2055971
ABSTRACT CLOSED LOOP MAGNETIC BRUSH DEVELOPMENT SYSTEM A printing machine, such as a copier or a printer, is provided with an electrophotographic engine cartridge including a toner castridge, a rotatable photoconductor drum, and a specially designed magnetic brush development module. The development module utilizes a rotating magnetic roller, disposed in a developer sump, to transport a toner carrier delveloper material toward a side surface portion of the rotating drum onto which the toner position of the transported developer is electrically transferred. The development module is operated in a unique closed loop fashion by the action of a specially designed blade member which strips away the toner-depleted developer from the roller and causes it to enter a recycling well. The depleted developer is transferred from the recycling well into the developer sump wherein it is mixed with toner entering the sump from the toner cartridge, and then re-applied, in the form of reconstituted developer, to the magnetic roller for subsequent toner transfer to the rotating drum.
Compaq Computer Corporation
Finlayson & Singlehurst
LandOfFree
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