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HIGHLY RELIABLE DOCUMENT FEEDER ACHIEVED THROUGH REDUNDANT SEPARATORS

IP.com Disclosure Number: IPCOM000027463D
Original Publication Date: 1997-Feb-28
Included in the Prior Art Database: 2004-Apr-08
Document File: 2 page(s) / 81K

Publishing Venue

Xerox Disclosure Journal

Abstract

Proposed is a document handler that improves multiple feeds. The document handler employs a paddle wheel feeder coupled with an active retard feeder. The paddle wheel replaces a traditional nudger. The paddle wheel nudger sends multiple sheets to the feeder at a rate of 2 thousand per 1 million feeds. Previously when the top active retard feeder receives a multiple sheet stack, torque at the retard roll is not sufficient to make a slip clutch active. This causes a backward motion on the bottom sheets. With the paddle wheel temporarily set between nudgers, such that the paddles do not contact the stack, the sheets are "kicked back" with no resistance. The elimination of multiple sheets in the nip of the active retard feeder also reduces smears.

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XEROX DISCLOSURE JOURNAL

Proposed Classification
U. S. C1. 355/308
Int. C1. G03g 21/00

HIGHLY RELIABLE DOCUMENT FEEDER ACHIEVED THROUGH REDUNDANT SEPARATORS
Jack K. Fullerton
Charles F. Prevost
Michele D. Taber
James 0. Mitchel
Michael J. Martin
Richard A. Beck

72

FIG. 7

16

FIG. 2

XEROX DISCLOSURE JOURNAL - Vol. 22, No. 1 Januaxy/February 1997 41

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HIGHLY RELIABLE DOCUMENT FEEDER ACHIEVED THROUGH REDUNDANT SEPARATORS (CONT'D)

Proposed is a document handler that improves multiple feeds. The document handler employs a paddle wheel feeder coupled with an active retard feeder. The paddle wheel replaces a traditional nudger. The paddle wheel nudger sends multiple sheets to the feeder at a rate of 2 thousand per 1 million feeds. Previously when the top active retard feeder receives a multiple sheet stack, torque at the retard roll is not sufficient to make a slip clutch active. This causes a backward motion on the bottom sheets. With the paddle wheel temporarily set between nudgers, such that the paddles do not contact the stack, the sheets are "kicked back" with no resistance. The elimination of multiple sheets in the nip of the active retard feeder also reduces smears.

Figures 1 and 2 illustrate a top active retard feeder 10 having a drive roll 12, retard roll 14, retard pad 16, and a paddle wheel 18 with paddles 20 and 22. Figure 1 shows a feed of multiple sheets 24 and 26 from stack 28 during the nud...