Patent ID: 7444862
Filing Date: 2008-11-04
Classification: B65H,D21F,D21G,G01L

Abstract:
1. A method for measuring a lateral tension profile of a fibrous web, comprising: placing at least one pressure-sensitive film sensor on a roll in a helical configuration with respect to a surface thereof; covering the at least one pressure-sensitive film sensor with a covering selected from group consisting of a coating over the roll and a tubular protective skin placed over the roll; and measuring a force exerted by the web on the roll using the at least one pressure-sensitive film sensor, the roll having the web wrapped at least partially thereabout such that contact therebetween defines an overlap angle, the at least one pressure-sensitive film sensor having at least one active zone for measuring the force exerted by the web, the at least one pressure-sensitive film sensor being further configured to be disposed substantially completely within the overlap angle during a first portion of each revolution of the roll, and then substantially completely within an open space on the surface of the roll, outside the overlap angle, during a second portion of each revolution of the roll.