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Developer Contamination Control Disclosure Number: IPCOM000065179D
Original Publication Date: 1985-Nov-01
Included in the Prior Art Database: 2005-Feb-19

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Haskell, LR Reider, RJ Schwartz, BC [+details]


This article describes a technique of controlling contamination from a developer station in a transfer-type electrophotographic process by modifying components in close proximity to the drum to affect air flow. Fig. 1 shows the machine configuration and the key parameters which are important to control so that contamination from the developer 10 can be minimized. During operation, the developer generates a heavy cloud of toner dust due to the mechanical action of churning the toner and carrier mix. This toner cloud tends to be drawn from the developer assembly by the rotating drum 11 due to entrapment of toner dust in a boundary layer of air next to the rotating drum 11. This toner may then contaminate the image-receiving paper and other components in the machine. In Fig.