Image forming apparatus including toner scattering prevention

Details Image forming apparatus including toner scattering prevention Image forming apparatus including toner scattering prevention

1996-01-29

1998-04-14

Grimley, Arthur T.

Electrophotography

Image formation

Transfer

399296, 399312, 399314, 399390, G03G 1516

Patent

active

057405085

ABSTRACT:
An image forming apparatus having a charger which applies a voltage of the same polarity as a toner image formed on an intermediate transfer member onto an upstream side of a first transfer portion at which the intermediate transfer member faces an image bearing member, as well as a transfer electrode which applies a bias voltage of an opposite polarity to the toner image onto a downstream side of the first transfer portion. On an upstream side of a second transfer portion at which the toner image formed on the intermediate transfer member is transferred by a transfer roller onto a transfer sheet with respect to a sheet transporting direction, a bias voltage applying device is provided which applies to the transfer sheet a voltage of an opposite polarity to the toner image and greater than a surface potential of the intermediate transfer member at the second transfer portion. At a position facing to the transfer roller through the intermediate transfer member, a voltage of an opposite polarity to the toner image is applied, and a recharger is provided which applies to the intermediate transfer member a voltage of the same polarity as the toner image on an upstream side of the second transfer portion.

REFERENCES:
patent: 3697170 (1972-10-01), Bhagat et al.
patent: 3976370 (1976-08-01), Goel et al.
patent: 4183658 (1980-01-01), Winthaegen
patent: 4348098 (1982-09-01), Koizumi
patent: 4931839 (1990-06-01), Tompkins et al.
patent: 4984025 (1991-01-01), Landa et al.

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