B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
154/38
B65H 23/182 (2006.01) B65H 23/04 (2006.01)
Patent
CA 1280680
DETECTION AND CONTROL OF STRETCH IN FILM MATERIAL ABSTRACT OF THE DISCLOSURE A device for measuring and controlling the stretch in a web of film material to correspond to the predetermined stretch in a second web of material with both webs being fed to laminating rolls comprising a supply roll for said first material, feed rolls for pulling said first web of material from said supply roll, an endless belt for supplying an initial tension on said first web and operated by a motor. A dancer arm loaded by a pneumatic con- trolled piston to increase or decrease the tension on the first web of material, a photo electric scanner for measuring the width or thickness of said first web of material to provide an input to said pneumatically operated piston and a sensor and computer for measuring the position of the dancer arm to provide a signal to said motor to adjust initial tension on said first web so that said first web will be stretched an amount similar to that on the second web of material.
498593
Colgate-Palmolive
Smart & Biggar
LandOfFree
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