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INSERT MOLDED SEGMENTED FEEDSHAFT WITH INTEGRAL WRAP SPRING CLUTCH

IP.com Disclosure Number: IPCOM000025885D
Original Publication Date: 1988-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 70K

Publishing Venue

Xerox Disclosure Journal

Abstract

A low cost paper feeding mechanism is required to separate one sheet from a stack of paper in a spring loaded cassette to drive the paper through the remainder of the machine. The traditional design utilizes a shaft, molded segments, pins to secure the segments, elastomer bands wrapped around the segments, bearings, and a purchased mechanical wrap.

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XEROX DISCLOSURE JOURNAL

INSERT MOLDED SEGMENTED Proposed Classification FEEDSHAFT WITH INTEGRAL WRAP
SPRING CLUTCH
Mark A. Adiletta

U.S. C1. 355/35H Int. C1. G03b 27/72

FIG. I

7

FIG. 2

Volume 13 Number 5 September/October 1988 267

[This page contains 1 picture or other non-text object]

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INSERT MOLDED SEGMENTED FEEDSHAFT WITH INTEGRAL WRAP SPRING CLUTCH (Cont'd)

A low cost paper feeding mechanism is required to separate one sheet from a stack of paper in a spring loaded cassette to drive the paper through the remainder of the machine. The traditional design utilizes a shaft, molded segments, pins to secure the segments, elastomer bands wrapped around the segments, bearings, and a purchased mechanical wrap.

The design has high costs associated with multiple components (as many as
14), significant assembly time and insuring dimensional stability in maintaining a coplanar relation between feed segment and clutch orientation.

The current design, as illustrated, utilizes similar features, but achieves them through a single molding operation. By insert molding on the shaft, the number of components is reduced to (7), i.e. steel shaft 1, drive gear 2, collar 3, spring 4, elastomer bands 5, "E" ring 6 and wrap spring clutch 7, and the coplanar relationship is repeatable to a tighter tolerance, thus reducing the amount of paper skew out of the cassette. The first half of the clutch is molded onto the shaft. The torque required to drive the shaft is transmitted...