Browse Prior Art Database

Backlash Damping Width Guide

IP.com Disclosure Number: IPCOM000018824D
Publication Date: 2003-Aug-15
Document File: 2 page(s) / 255K

Publishing Venue

The IP.com Prior Art Database

Abstract

Width guides are commonly used to guide paper into input devices. In this application the guides align and center the paper stack. If the guides are not adjusted up to the edge of the stack, the documents in the stack being input can be skewed and /or off center. This can result in poor copy quality, document damage and shutdowns. This invention eliminates free-play from the OB guide, which is the guide that is adjusted by the operator. Free-play is eliminated by generating all of the drag force from the OB guide.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 75% of the total text.

Backlash Damping Width Guide

Width guides are commonly used to guide paper into input devices. In this application the guides align and center the paper stack. If the guides are not adjusted up to the edge of the stack, the documents in the stack being input can be skewed and /or off center. This can result in poor copy quality, document damage and shutdowns.

Width guides using a rack and pinion configuration have a common problem associated with them.� There is backlash in the system.� When the outboard (OB) guide is pushed up the stack edge, the guide often moves back away from the stack when released by the operator.� Backlash in between the rack and pinion is often the major contributor to this free play as well as excessive clearances between mating parts in the system.

This problem with backlash and clearances was often resolved by tighter specifications for the gear and rack quality as well as tighter tolerances for features related to the width guide system.

This invention eliminates free-play from the OB guide, which is the guide that is adjusted by the operator.� Free-play is eliminated by generating all of the drag force from the OB guide.

The drag force is generated by a spring.� Whatever means being used, the key idea is that the drag force must originate from the guide part itself. If the force does not originate from the guide, any clearances in the system between the origin of the drag force and the width guide would translate into free play in the OB guide...