Apparatus and method for cleaning a transfer device of an image

Details Apparatus and method for cleaning a transfer device of an image Apparatus and method for cleaning a transfer device of an image

1997-09-29

1999-01-05

Royer, William J.

Electrophotography

Control of electrophotography process

Control of transfer

399313, G03G 1500

Patent

active

058571329

ABSTRACT:
A contact type image transferring system and method, incorporated in an image forming apparatus, for cleaning a residual toner on a transfer roller. The transfer roller is in contact with a photoconductive drum and forms a nip between the roller and the drum. A sheet of paper passes through the nip and a toner image on the drum is transferred to the sheet of paper. When the sheet of paper is not at the nip, not only a transfer voltage but also a charging voltage is applied at a same time. The polarities of the voltages applied to the charger and to the transfer roller cause the toner on the transfer roller to be removed.

REFERENCES:
patent: 4269503 (1981-05-01), Nishikawa
patent: 5151736 (1992-09-01), Ohzeki et al.
patent: 5182604 (1993-01-01), Asai
patent: 5253022 (1993-10-01), Takeuchi et al.
patent: 5337127 (1994-08-01), Imaue

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