Multicolor image forming apparatus

Details Multicolor image forming apparatus Multicolor image forming apparatus

1998-07-30

1999-10-05

Grimley, Arthur T.

Electrophotography

Image formation

Transfer

399301, 399302, 399345, G03G 1516

Patent

active

059637692

ABSTRACT:
In a multicolor image forming apparatus, an intermediate transfer belt is moved at a first speed. A secondary transfer roll is pressed against the intermediate transfer belt at the time of secondary transfer in order to secondarily transfer a multicolor toner image on the intermediate transfer belt onto recording paper. The secondary transfer roll is rotated by a driving unit including a gear unit at a peripheral speed higher than the first speed. A torque limiter limits the driving torque of the secondary transfer roll pressed against the intermediate transfer belt to the load torque of the secondary transfer roll separated from the intermediate transfer belt. Consequently, the secondary transfer roll is rotated at a speed equal to or slightly higher than the speed of the intermediate transfer belt and the load of the secondary transfer roll applied to the intermediate transfer belt never exceeds a predetermined value.

REFERENCES:
patent: 5438398 (1995-08-01), Tanigawa et al.
patent: 5822666 (1998-10-01), Haneda et al.

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