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Browse Prior Art Database

Copier Duplex Tray

IP.com Disclosure Number: IPCOM000034279D
Original Publication Date: 1989-Jan-01
Included in the Prior Art Database: 2005-Jan-27

Publishing Venue

IBM

Related People

Authors:
Hopping, JM Soderstrom, ET [+details]

Abstract

A first-in, first-out (FIFO) duplex tray for use with a xerographic copier is disclosed. This tray includes a centrally located paper tray depression into which the front, mid portion of the lowermost sheet is drawn by a vacuum belt feeder. As a result of the bowing of this sheet, the two leading corners of the sheet may bow upward excessively, (Image Omitted) especially if the sheet is inherently curled. Generally horizontally blowing air jets are provided in the bottom of the paper tray, adjacent these two corners, such that the jet's moving air provides an air bearing under this lowermost sheet, and also pulls the sheet's front corners down and flat, by virtue of the Bernoulli forces associated with this moving air. Fig. 1 is a top view of the FIFO tray. Fig. 2 is a view from the right, and Fig.