Image forming apparatus

Details Image forming apparatus Image forming apparatus

2008-07-29

2008-07-29

Gray, David M (Department: 2852)

Electrophotography

Image formation

Transfer

C399S301000, C399S302000, C399S308000

Reexamination Certificate

active

07406282

ABSTRACT:
Disclosed is an image forming apparatus, which comprises an intermediate transfer belt (15), and a plurality of image-forming units (11) to (14) disposed along the intermediate transfer belt (15) and adapted to form toner images of different colors and sequentially transfer the toner images onto the intermediate transfer belt (15) in a superimposed manner so as to form a color toner image. The intermediate transfer belt (15) is laid across a drive roller (16), a driven roller (17) and a tension roller (18), in a tensioned condition. A rotation speed of the tension roller (18) adapted to apply a tension to the intermediate transfer belt (15) is detected to obtain a linear speed of the intermediate transfer belt (15). In a process of color-misregistration correction, a write-start timing for each toner image of the colors is adjusted based on the linear speed of the intermediate transfer belt (15).

REFERENCES:
patent: 5612771 (1997-03-01), Yamamoto et al.
patent: 5881346 (1999-03-01), Mori et al.
patent: 6898386 (2005-05-01), Takigawa
patent: 2004/0184831 (2004-09-01), Isobe
patent: 2006/0088338 (2006-04-01), Matsuda et al.
patent: 2003-233233 (2003-08-01), None

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