Developing apparatus and picture image forming apparatus

Details Developing apparatus and picture image forming apparatus Developing apparatus and picture image forming apparatus

1997-05-27

1999-01-12

Smith, Matthew S.

Electrophotography

Image formation

Development

399275, 399277, G03G 1309

Patent

active

058600493

ABSTRACT:
By employing a developer using ferrite system carriers, a developing process can be carried out using a low brushing force by a magnetic portion having the same polarity in a developing unit in a developing roller. A relationship between a circumferential speed Up (mm/sec) of a photoconductor, a ratio K of a circumferential speed of a developing sleeve of the developing roller to the circumferential speed of the photoconductor, and a developing potential difference .DELTA.V (V) is set to 1.5.ltoreq.(K.times..DELTA.V/Up).ltoreq.2.1.

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patent: 4078929 (1978-03-01), Gundlach
patent: 4833505 (1989-05-01), Furuya et al.
patent: 5442425 (1995-08-01), Yokoyama et al.
patent: 5491541 (1996-02-01), Yokoyama et al.
patent: 5634183 (1997-05-01), Saito et al.

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