Image transferring device for image forming apparatus

Details Image transferring device for image forming apparatus Image transferring device for image forming apparatus

1994-05-16

1996-02-20

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355273, G03G 1514

Patent

active

054933714

ABSTRACT:
A device incorporated in an image forming apparatus for transferring an image from a photosensitive element to a transfer sheet. The transfer device includes a drive roller, a driven roller, a transfer belt for transferring a toner image formed on a latent image carrier to a transfer sheet, a bias roller, a feedback roller. In addition a power source device is provided for applying a voltage to the bias roller from a power source, and includes a control for controlling an output of the power source. The transfer belt passes over the drive roller and the driven roller, and the power source is connected to the bias roller and the feedback roller. Where an output current flowing from the power source to the transfer belt via the bias roller is I-1, and a feedback current flowing from the transfer belt to the power source via the feedback roller is I-2, the currents are controlled such that they satisfy the following equation:

REFERENCES:
patent: 5159392 (1992-10-01), Kasahara et al.
patent: 5172173 (1992-12-01), Goto et al.
patent: 5386274 (1995-01-01), Sanpe et al.

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