Image forming apparatus having heat-fixing unit

Details Image forming apparatus having heat-fixing unit Image forming apparatus having heat-fixing unit

2007-02-21

2009-08-04

Lee, Susan S (Department: 2852)

Electrophotography

Control of electrophotography process

Control of fixing

Reexamination Certificate

active

07570895

ABSTRACT:
An image forming apparatus includes an image forming portion; a fixing portion having a fixing nip portion which heats and fixes the unfixed image and an discharge roller which discharges the recording material, wherein in the case where the recording material is the plain paper which is equal to or larger than the predetermined size, the discharge roller conveys the plain paper in a range from a front edge to a rear edge at a predetermined speed, in the case where the recording material is the plain paper smaller than the predetermined size, the discharge roller conveys the plain paper at a first speed until the rear edge passes through the fixing nip portion, and the discharge roller conveys the plain paper at a second speed higher than the first speed after the rear edge passed through the fixing nip portion.

REFERENCES:
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patent: 6937827 (2005-08-01), Katoh et al.
patent: 7266316 (2007-09-01), Tanonaka
patent: 2003/0202809 (2003-10-01), Tanaka
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patent: 7-017295 (1995-03-01), None
patent: 3187493 (2001-05-01), None
patent: 2006030407 (2006-02-01), None

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