Image forming apparatus and control method for the same

Details Image forming apparatus and control method for the same Image forming apparatus and control method for the same

2005-09-13

2005-09-13

Chen, Sophia S. (Department: 2852)

Electrophotography

Image formation

Fixing

C399S071000, C399S328000, C399S333000, C492S056000

Reexamination Certificate

active

06944419

ABSTRACT:
An electrophotographic image forming apparatus includes a fixing unit having a heat roller and a press roller which abuts against and presses the heat roller. The image forming apparatus further includes at least one cleaning unit including a backup roller which abuts against and presses the heat roller in order to remove remaining toner attaching to a surface of the heat roller. The backup roller has a two-layer structure of a metal shaft core and a resilient layer, as an outer layer for the shaft core, made of a resilient body. The diameter of the backup roller gradually reduces from a projecting axial center of 10 mm to 30 mm toward two axial ends, so that an entire outer shape of the backup roller forms a crown or spindle like shape.

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