Browse Prior Art Database

DOCUMENT FEEDER EDGE BIASING DEVICE

IP.com Disclosure Number: IPCOM000025670D
Original Publication Date: 1987-Feb-28
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 76K

Publishing Venue

Xerox Disclosure Journal

Abstract

In some automatic document feeders, the feeding of sheets of varying sizes will result in misalignment of some sheets in reference to a registration edge. This misalignment of sheets can be avoided by use of the edge biasing document feeder shown in Figures 1 and 2 which shows the addition of high friction pads to a stack load arm and to a document tray directly beneath the arm in order to provide a pivot point in an off-center bottom feeder to align fed documents against an edge guide. The stack arm offsets the moment created by the feeder on the rest of the stack and thereby allows the accommodation of feeding mixed sizes of documents from a tray having only a single edge guide.

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XEROX DISCLOSURE JOURNAL

DOCUMENT FEEDER EDGE BIASING DEVICE
William D. Milillo

Proposed Classification

U.S. C1.355114SH Int. C1. G03g 15/00

i

e

FIG. 1

NORMAL

a FIG. 2

Volume 12 Number 1 January/February 1987 53

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DOCUMENT FEEDER EDGE BIASING DEVICE (Cont'd)

In some automatic document feeders, the feeding of sheets of varying sizes will result in misalignment of some sheets in reference to a registration edge. This misalignment of sheets can be avoided by use of the edge biasing document feeder shown in Figures 1 and 2 which shows the addition of high friction pads to a stack load arm and to a document tray directly beneath the arm in order to provide a pivot point in an off-center bottom feeder to align fed documents against an edge guide. The stack arm offsets the moment created by the feeder on the rest of the stack and thereby allows the accommodation of feeding mixed sizes of documents from a tray having only a single edge guide.

The low cost document feeding apparatus of Figures 1 and 2 includes an arm loaded at (D) in an expedient fashion against the top of a document stack (b). The exact position (0 on the stack where the arm makes contact is analytically determined. On the bottom of the arm itself (g) and beneath the stack (a), friction pads are mounted. . As paper is fed from the bottom of the stack a moment is created on the bottom sheet forcing it to register against an edge paper ride...