Image forming apparatus with developing recovery device

Details Image forming apparatus with developing recovery device Image forming apparatus with developing recovery device

1997-01-30

1999-01-26

Brase, Sandra L.

Electrophotography

Image formation

Combined or plural functions by single component

399 55, 399285, G03G 1530

Patent

active

058647368

ABSTRACT:
Cleaning effectiveness is improved, and inadequate charging of the photosensitive member due to soiling of the charging brush as well as image noise such as background fog are suppressed by a developing device capable of recovering residual toner regardless of the toner charge polarity. In an image forming apparatus provided with a developing device including a developing sleeve for developing an electrostatic latent image on photosensitive member via toner and recovering residual toner from the surface of photosensitive member, a power unit is provided for forming a direct current electric field between photosensitive member and developing sleeve during developing, and forming alternating current electric fields between photosensitive member and developing sleeve 16 during cleaning of residual toners.

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patent: 5619316 (1997-04-01), Shoji et al.

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