Browse Prior Art Database

FEEDABILITY SENSOR FOR A VACUUM CORRUGATION FEEDER

IP.com Disclosure Number: IPCOM000025459D
Original Publication Date: 1985-Aug-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 51K

Publishing Venue

Xerox Disclosure Journal

Abstract

In a vacuum corrugation feeder (VCF), optimization of the air knife pressure improves feeding reliability, minimizes the noise level, and increases the motor life. I t has been found that feedability can be sensed by measuring the pressure at a point in the center of a paper tray. By pressure transducer 10 shown in the figure and comparing this pressure to a reference pressure given by:

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XERQX DISCLOSURE JOURNAL

FEEDABILITY SENSOR FOR A VACUUM CORRUGATION FEEDER Raymond W. Huggins

Proposed Classification
U.S. C1. 271/108 Int. C1. B65h 3/08

In a vacuum corrugation feeder (VCF), optimization of the air knife pressure improves feeding reliability, minimizes the noise level, and increases the motor life. It has been found that feedability can be sensed by measuring the pressure at a point in the center of a paper tray. By pressure transducer 10 shown in the figure and comparing this pressure to a reference pressure given by:

where pn = air knife pressure from transducer 12 and plenum 14 and m and p are constants. The constants m and p were found to be constant for any given homogeneous stack of paper illustrated at 16 and to vary mainly as a function of the paper stress.

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A sensor and control system have been built based on the above empirical relationship. The comparison of p and pn was carried out pneumatically using a simple pressure divider which divides by l/m, and a differential pressure switch with a switching pressure equal to p

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Volume 10 Number 4 July/August 1985 191

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   XEROX DISCLOSURE JOURNAL Volume 10 Number 4 July/August 1985

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