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Non-Contacting Symmetrical Media Stripping System

IP.com Disclosure Number: IPCOM000132286D
Publication Date: 2005-Dec-06
Document File: 2 page(s) / 13K

Publishing Venue

The IP.com Prior Art Database

Abstract

This disclosure describes a system which would guide the media to the de-curler in the same position every time without the need for sharp metal fingers in the area of the pressure roll. The system works on the Bernoulli Effect that air moving across a media will hold the media firmly in the center of a baffle until the take-up rollers can grab the edge of the media.

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Non-Contacting Symmetrical Media Stripping System

Most electrophotographic processors have a mechanism to prevent media exiting the fuser nip from sticking to the fuser roller.  One way this can be accomplished is with air jets.  There is an assembly in place to provide a pulse of air to peel the media from the roll surface and help to direct it into the exit baffle.  The position of the media is determined by the beam strength of the media.  Also, the media may attach itself to the surface of the pressure roll through electrical charges on the media.  The media can be removed from the pressure roll using a finger of metal that slides against the pressure roll.  The knife-edge on the metal finger helps to peel the media from the pressure roll and guide it into the exit baffle.  However, when there is a jam in the fuser there is a chance that the media will bend the fingers out straight.  The clean up of this jam can result in damage to the pressure roll surface and roll replacement.

This disclosure describes a system which would guide the media to the de-curler in the same position every time without the need for sharp metal fingers in the area of the pressure roll.  The system works on the Bernoulli Effect that air moving across a media will hold the media firmly in the center of a baffle until the take-up rollers can grab the edge of the media.


The two chambers would have separate air supplies in order to balance the pressures on each side of the media.  The forc...