Browse Prior Art Database

TOOL AND METHOD FOR STACK FORCE CALIBRATION

IP.com Disclosure Number: IPCOM000026785D
Original Publication Date: 1993-Aug-31
Included in the Prior Art Database: 2004-Apr-06
Document File: 2 page(s) / 93K

Publishing Venue

Xerox Disclosure Journal

Abstract

A tool and method of use are described which improves the accuracy, repeatability and speed of setting up the stack force in a retard paper feeder mechanism associated with paper handling assemblies in printing and copying machines. The tool may be utilized in a manufacturing, development or field environment. The cost of the tool is about $10. The tool as shown in the Figure (top view) consists of a Force Sensing Resistor (FSR), having a known set of resistance values associated with a known set of normal forces.

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XEROX DISCLOSURE JOURNAL

TOOL AND METHOD FOR STACK FORCE CALIBRATION U.S. C1.3551311 Robert A. Lonis

Proposed Classification

Int. C1. G03g 21/00

- Tool for measuring Stack Force

- Force Sensing

Resistor

4 - Contact Area of

Feed Belt

-Electrical Leads to Contacts

C- PaperTray

-

Resistance Values

XEROX DISCLOSURE JOURNAL - Vol. 18, No. 4 July/August 1993 435

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

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TOOL AND METHOD FOR STACK FORCE CALIBRATION (Cont'd)

A tool and method of use are described which improves the accuracy, repeatability and speed of setting up the stack force in a retard paper feeder mechanism associated with paper handling assemblies in printing and copying machines. The tool may be utilized in a manufacturing, development or field environment. The cost of the tool is about $10. The tool as shown in the Figure (top view) consists of a Force Sensing Resistor (FSR), having a known set of resistance values associated with a known set of normal forces.

Existing methods of setting critical stack force and stack force relief in a retard paper feeding mechanism is by either performing an elaborate sequence of adjustments and measurements with an expensive load cell in manufacturing, or by performing an inaccurate setup with shims in field service. These two methods do not enable quick, accurate and reproducible results in either environment. A desired approach would be to measure the actual stack force on a stack of paper with a pape...