Browse Prior Art Database

Collator Bin

IP.com Disclosure Number: IPCOM000089214D
Original Publication Date: 1977-Oct-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 22K

Publishing Venue

IBM

Related People

Meyer, CG: AUTHOR [+3]

Abstract

Electrostatic cling of paper to plastic, nonconducting collator bins is eliminated by unsymmetrically shaped bottom-of-the-bin ribs which induce an air-foil effect supporting a sheet of paper as it enters the bin.

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Collator Bin

Electrostatic cling of paper to plastic, nonconducting collator bins is eliminated by unsymmetrically shaped bottom-of-the-bin ribs which induce an air- foil effect supporting a sheet of paper as it enters the bin.

As the first sheet of paper 10 enters the bin (only the bottom bin wall is shown), its leading edge is attracted to the plastic bottom bin wall 11. The degree of such attraction is a function of the sheet's electrostatic charge, this in turn being a function of ambient conditions such as humidity. The bin's bottom wall includes a plurality of elongated ribs 12 which run normal to the direction of sheet movement. As shown, these ribs are not symmetrical in cross-section, and include a long wall which lies at a relatively flat angle, and a steep wall facing away from the advancing paper.

A number of these ribs occupy the portion of the bin's bottom wall found to receive initial impact by the sheet's leading edge, and function to reduce the bin's surface contact with the paper. The rib shape creates an air-foil effect on the bottom surface of sheet 10, causing the sheet to travel the full length of the bin.

The collator bins may be assembled from a number of vertically stacked walls, one of which is shown, formed of plastic which is extruded in the direction in which ribs 12 run.

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