Electrophotography – Image formation – Transfer
Patent
1998-06-18
2000-08-22
Lee, Susan S. Y.
Electrophotography
Image formation
Transfer
399298, 399311, 399312, 399314, 399318, G03G 1501, G03G 1516
Patent
active
061085103
ABSTRACT:
A color image forming apparatus having a plurality of image forming units, a first attraction unit and a second attraction unit for attracting a recording sheet to a transport belt, and a controller for operating the first attraction unit when a first mode is set for forming a color image using all of the plurality of image forming units, and for operating the second attraction unit when a second mode is set for forming a single-color image using only one of the image forming units. In another embodiment, a controller sets a transfer pressure at a first pressure for each of the plurality of image forming units when the first mode is set and at a second pressure, which is higher than the first pressure, for the image forming units not being used to form the single-color image when the second mode is set. In another embodiment, a controller controls each transfer component for each image forming unit to change an electric field so that an area that is acted upon by the electric field is a first area when the first mode is set and to change the electric field to a second area that is larger than the first area when the second mode is set.
REFERENCES:
patent: 4531828 (1985-07-01), Hoshino
patent: 4723146 (1988-02-01), Kasahara
patent: 4933727 (1990-06-01), Mizuma et al.
patent: 5010372 (1991-04-01), Kasahara et al.
patent: 5153651 (1992-10-01), Kurotaka
patent: 5187536 (1993-02-01), Hasegawa et al.
patent: 5303018 (1994-04-01), Terada et al.
patent: 5313259 (1994-05-01), Smith
patent: 5335052 (1994-08-01), Sato et al.
patent: 5602629 (1997-02-01), Saito et al.
patent: 5765082 (1998-06-01), Numazu et al.
patent: 5765094 (1998-06-01), Nakamura
patent: 5893017 (1999-04-01), Yamamoto
patent: 5930556 (1999-07-01), Imamiya
patent: 5943526 (1999-08-01), Kodama
Lee Susan S. Y.
Minolta Co. , Ltd.
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