Developing device with retractable cutoff member

Details Developing device with retractable cutoff member Developing device with retractable cutoff member

1988-12-09

1990-09-25

Grimley, A. T.

Photocopying

Contact printing

Light boxes

118658, 355251, G03G 1509

Patent

active

049596926

ABSTRACT:
A developing device including a rotatable developing sleeve confronting an electrostatic latent image support member, a supply device for supplying developer to a peripheral surface of the developing sleeve, a bristle height regulating member, a device for removing from the peripheral surface of the developing sleeve, the developer having passed through a developing region, a cutoff device for cutting off supply of the developer from the supply device to the developing sleeve, which is retractably projected into a developer supply region defined between the developing sleeve and the supply device and a magnet member provided fixedly in the developing sleeve and having a developing magnetic pole confronting the support member, a first magnetic pole confronting the bristle height regulating member and a second magnetic pole of a polarity identical with that of the first magnetic pole such that the developer is continuously held in an erect state on the developing sleeve by the first and second magnetic poles.

REFERENCES:
patent: 4492456 (1985-01-01), Haneda
patent: 4746952 (1988-05-01), Kusuda et al.

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