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LOW COST DOCUMENT BOTTOM FEEDER, FLEXIBLE DRIVER

IP.com Disclosure Number: IPCOM000025036D
Original Publication Date: 1983-Jun-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 83K

Publishing Venue

Xerox Disclosure Journal

Abstract

A low cost document bottom feeder that uses bottom feed friction retard sheet separation with high and low friction surfaces on the driving element. A deformable foam segment 1 on each sheet drive wheel 2 provides a high friction surface to overcome the sheet retarding force and sheet-to-stack friction to drive the sheet out of the separator. The deformable foam segments 1 have a larger radius and extend up through apertures in the bottom of the feed tray as the wheels rotate and deform to follow the contour of the retard elements. As the wheels 2 continue to rotate their low friction surface (the rest of the wheel surface) may come into contact with the stack bottom but does not apply sufficient force to separate a sheet from the stack. A single central roller 2 or two spaced rollers 2 on a common shaft may be used. The retard elements are flexible frictional retard strips 3 on a weighted shaft 4 providing a normal force.

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(EROX DISCLOSURE JOURNAL

LOW COST DOCUMENT BOTTOM FEEDER, FLEXIBLE DRIVER Frank J. Robb
Drew A. Unterborn
Richard S. Mather

Proposed Classification
U.S. Cl. 271/37 Int. CI. R65h 1/22

FIG. I

FIG. 2

Volume 8 Number 3 May/June 1983 197

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LOW COST DOCUMENT BOTTOM FEEDER, FLEXIBLE DRIVER (Cont'd)

A low cost document bottom feeder that uses bottom feed friction retard sheet separation with high and low friction surfaces on the driving element. A deformable foam segment 1 on each sheet drive wheel 2 provides a high friction surface to overcome the sheet retarding force and sheet-to-stack friction to drive the sheet out of the separator. The deformable foam segments 1 have a larger radius and extend up through apertures in the bottom of the feed tray as the wheels rotate and deform to follow the contour of the retard elements. As the wheels 2 continue to rotate their low friction surface (the rest of the wheel surface) may come into contact with the stack bottom but does not apply sufficient force to separate a sheet from the stack. A single central roller 2 or two spaced rollers 2 on a common shaft may be used. The retard elements are flexible frictional retard strips 3 on a weighted shaft 4 providing a normal force.

This feeder has a self-timing feature. The long low friction zone gives a dwell period in which the drive element can continue to rotate but a sheet is not fed. Thus, the feeder can be regula...