Apparatus and method for reducing media wrinkling in an imaging

Details Apparatus and method for reducing media wrinkling in an imaging Apparatus and method for reducing media wrinkling in an imaging

1998-10-07

2000-09-26

Pendegrass, Joan

Electrophotography

Image formation

Fixing

399400, G03G 1520

Patent

active

061252565

ABSTRACT:
An improved apparatus and method for reducing media wrinkling, especially in envelopes, caused by transport through a fusing nip are provided. To compensate for stress build up in the media as it travels through the fusing nip, the media is bent or "pre-stressed" in a direction opposite to the nip stress prior to the media entering the fusing nip. A media support surface is positioned upstream from the fusing nip to pre-stress the media by providing pre-nip bending to the media. The media is bent in a direction opposite to the curvature of the harder nip roller prior to the media entering the fusing nip. This pre-nip bending of the media substantially offsets the nip-stress imparted on the media by the fusing nip.

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