Image forming apparatus with a toner transfer device

Details Image forming apparatus with a toner transfer device Image forming apparatus with a toner transfer device

1990-02-12

1991-08-13

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

G03G 1516

Patent

active

050400282

ABSTRACT:
A toner transfer device which transfers toner on a photoconductor to an intermediate transfer belt applied on a plurality of rollers, wherein at least part of the surface of the photoconductor moves in an arc while being pressed against the intermediate transfer belt, the toner transfer device comprising: a pair of transfer rollers disposed along the intermediate transfer belt between two of the rollers in such a manner that the part of the surface of the photoconductor which moves in an arc is positioned between the transfer rollers, at least part of each transfer roller being located outside each of two tangents, one of the tangents touching the photoconductor and one of the two rollers, the other tangent touching the photoconductor and the other roller, thereby allowing a certain length of the intermediate transfer belt between the two transfer rollers to be pressed against the part of the surface of the photoconductor moving in an arc; and a means for applying voltage to the transfer rollers, the voltage polarity being opposite to that of the toner.

REFERENCES:
patent: 4341455 (1982-07-01), Fedder
patent: 4652115 (1987-03-01), Palm et al.

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