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Browse Prior Art Database

LATERAL SHEET REGISTRATION SYSTEM

IP.com Disclosure Number: IPCOM000026304D
Original Publication Date: 1991-Apr-30
Included in the Prior Art Database: 2004-Apr-05
Document File: 8 page(s) / 567K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed herein is a sheet registration system which can laterally (side) register a moving sheet while maintaining controlled feeding in the primary feeding direction of the sheet. As disclosed, the present system can be very simple, preferably utilizing only multiple sheet-engaging rotatable rollers angularly mounted around the periphery of a rotating hub member so that the sheet-engaging rollers rotate with the rotating hub member but are also rotatable about their own, different, and differently angled, axes of rotation.

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Page 1 of 8

XEROX DISCLOSURE JOURNAL

LATERAL SHEET REGISTRATION Proposed Classification

SYSTEM U.S. C1.271/248 James A. Salomon Int. C1. B65h 09/16

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XEROX DISCLOSURE JOURNAL - Vol. 16, No. 2 MarcldApril1991 83

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LATERAL SHEET REGISTRATION SYSTEM(Cont'd)

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84 XEROX DISCLOSURE JOURNAL - Vol. 16, No. 2 MarcldApril1991

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Page 3 of 8

LATERAL SHEET REGISTRATION SYSTEM(Cont'd)

Disclosed herein is a sheet registration system which can laterally (side) register a moving sheet while maintaining controlled feeding in the primary feeding direction of the sheet. As disclosed, the present system can be very simple, preferably utilizing only multiple sheet-engaging rotatable rollers angularly mounted around the periphery of a rotating hub member so that the sheet-engaging rollers rotate with the rotating hub member but are also rotatable about their own, different, and differently angled, axes of rotation.

In the disclosed embodiment, the axes of rotation of the peripheral rollers are at a small angle relative to the axis of rotation of the rotating hub member. That latter axis is at a small angle to the primary feeding direction of the sheet, to impart a lateral movement force to the sheet. which can provide for positive side registration movement of the sheet. The axes of the illustrated peripheral rollers are approximately parallel to the primary sheet feeding direction to allow them to roll after side registration is achieved.

This disclosed system allows simple but controlled edge guide lateral sheet registration without excessive lateral force (overdriving) or undesirable slippage of the lateral registration sheet driving system on the sheet. By not requiring slippage for this registration. transport velocity in the primary direction of sheet movement may be maintained substantially constant. Thus, registration timing may be maintained constant, which is very valuable in overall sheet feeding systems controls.

By way of background, as taught, for example, in Xerox Corporation U.S.

4,836,527 issued June 6,1989 to Lam F. Wong, and other art cited therein, it is very desirable to provide a sheet edge registration system with positive, non- slip, non-wear, driving of a sheet forward in a primary feeding direction together with controlled side movement (transverse, perpendicular or lateral movement) of the same sheet against a side guide for side registration. As may be seen, the system disclosed in said U.S. 4,836,527, and others cited herein, is relatively complex. This and other U.S. patents on side registration systems further discuss desired features and difficulties for such systems, e.g., U.S. 4,546,964; 4,621,801; 4,775,142 and 4,744,554; 4,809,968; 4,919,318 and/or the curved (arcuate) sheet path slip-type cross-roller edge registration system of Sanchez U.S. 4,621,801.

A specific feature of the specific...