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TORSIONAL SPRING-SHAFT CLAMP FOR ADJUSTABLE PAPER GUIDES

IP.com Disclosure Number: IPCOM000027840D
Original Publication Date: 2000-Feb-29
Included in the Prior Art Database: 2004-Apr-09
Document File: 2 page(s) / 67K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is a torsional spring to shaft clamp for adjustable paper guides. Paper guides in document handlers on electrophotographic printing machines are required to be adjustable over a wide range of paper sizes. This requires the guides to be able to

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XEROX DISCLOSURE JOURNAL

TORSIONAL SPRING-SHAFT CLAMP FOR ADJUSTABLE PAPER GUIDES
William M. Harney

Proposed Classification
U. S. C1.399/361 Int. C1. G03g 15/00

74

Disclosed is a torsional spring to shaft clamp for adjustable paper guides.

Paper guides in document handlers on electrophotographic printing machines are required to be adjustable over a wide range of paper sizes. This requires the guides to be able to

43 Xerox Disclosure Journal - Vol. 25, No. 1 JanuaryFebruary 2000

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TORSIONAL SPRING-SHAFT CLAMP FOR ADJUSTABLE PAPER GUIDES (Cont'd)

adjust to a variety of sizes yet, still hold position when set to a particular setting. The use of a torsion spring on a shaft would give the ability to clamp at any position along the length of the shaft and still give the holding force required for paper guides to function properly.

As shown in the accompanying figure, an adjustable paper guide is achieved by utilizing a torsion spring 12 on a shaft 10 where the internal diameter of the torsion spring 12 in its free state is smaller than the diameter of shaft 10. This necessitates spring 12 to be slightly unwound by a flex force applied to the ends 14 and 16 of the spring 12. Upon relieving the unwinding force, spring 12 clamps to shaft 10 at the release point.

The concept is inexpensive to implement in design and straightforward in assembly. The long lever arms forming the legs 14 and 16 of torsion sprin...