Electrographic apparatus having improved developer metering cons

Details Electrographic apparatus having improved developer metering cons Electrographic apparatus having improved developer metering cons

1979-05-29

1980-10-14

Braun, Fred L.

Photocopying

Including fiber optics

118656, 118657, 222DIG1, G03G 1500, G03G 1509

Patent

active

042277965

ABSTRACT:
Electrographic apparatus having an improved developer metering construction provides an elongated coil spring that extends across an applicator member's transport path (from the developer supply to the development zone) to meter and mix applied developer. Spring tension can be adjusted to control developer flow. In certain embodiments the spring provides a source of reference potential for and/or triboelectrically charges the developer and can enhance magnetic mixing of the developer.

REFERENCES:
patent: 2638925 (1953-05-01), Monahan
patent: 3724725 (1973-04-01), Stauffer
patent: 3791731 (1974-02-01), Mihalik
patent: 3888578 (1975-06-01), Eto
patent: 4154520 (1979-05-01), Nishikawa et al.
patent: 4163614 (1979-08-01), Vock

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