Developing device having means for preventing toner scattering

Details Developing device having means for preventing toner scattering Developing device having means for preventing toner scattering

1996-12-24

1998-10-13

Grimley, Arthur T.

Electrophotography

Diagnostics

Consumable

399 55, 399285, 430120, G03G 1500, G03G 1508

Patent

active

058226478

ABSTRACT:
A voltage that has a difference in potential in the polarity direction opposite to the charge of the developer relative to the voltage applied to the sleeve by power supply 34 is applied to the control member by power supply 36. By this use of power supply 36, when the amount of remaining developer has fallen to a prescribed level, the conveyance of the developer to the photosensitive member by the sleeve is prevented, preventing image formation. Therefore, the image formation operation does not continue where the amount of remaining developer is small, which in turn eliminates the scattering of developer and maintains the cleanliness of the interior of the apparatus.

REFERENCES:
patent: 4733267 (1988-03-01), Enoki et al.
patent: 5220379 (1993-06-01), Fukuchi et al.
patent: 5365318 (1994-11-01), Hiraoka et al.
patent: 5374977 (1994-12-01), Shiina et al.
patent: 5572292 (1996-11-01), Chatani et al.

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