Gauge control apparatus for manufacturing web material

Claim 1

IN AN APPARATUS FOR EXTRUDING A WEB OF MATERIAL COMPOSED OF A HOPPER ADAPTED TO CONTAIN SAID MATERIAL FOR SAID WEB; EXTRUSION MEANS COMPOSED OF ORIFICE-DEFINING LIPS DISPOSED IN INTEGRAL RELATIONSHIP WITH SAID HOPPER ADAPTED TO EXTRUDE SAID MATERIAL IN THE FROM OF A WEB; A PUMP ADAPTED TO FORCE SAID MATERIAL THROUGH SAID LIPS OF SAID EXTRUSION MEANS ADAPTED TO COLLECT SAID WEB; ADJUSTMENT MEANS ADAPTED TO ADJUST THE THICKNESS OF SAID WEB, DISPOSED AT SAID EXTRUSION POSITION AND AT A PLURALITY OF LOCATION ACROSS THE WIDTH OF SAID WEB; MEANS FOR TRANSVERSELY SCANNING THE MOVING WEB, THE SCANNING MEANS DISPOSED BETWEEN SAID EXTRUSION MEANS AND SAID WINDUP MEANS ADAPTED TO PROVIDE AN OUTPUT THAT IS DIRECTLY RELATED TO THE DEVIATION OF THE WEB THICKNESS FROM A REFERENCE STANDARD AT ANY PARTICULAR LOCATION ACROSS THE WIDTH OF THE WEB; THE IMPROVEMENT WHEREIN CONTROL MEANS RESPONSIVE TO THE OUTPUT OF SAID SCANNING MEANS ADAPTED TO ACTIVATE THE ADJUSTMENT MEANS AT ANY PARTICULAR LOCATION; AND RESISTOR MEANS HAVING A VARIABLE RESISTANCE ACROSS ITS LENGTH ARE INTERPOSED BETWEEN SAID SCANNING MEANS AND SAID CONTROL MEANS, ADAPTED TO VARY THE REACTION OF SAID CONTROL MEANS TO THE OUTPUT AT ANY PARTICULAR LOCATION ON SAID SCANNING MEANS.