Caliper control in the continuous production of paper

Claim 1

IN THE COMBINATION WITH A METALLIC MACHINE CALENDER ROLL STACK WHICH IS USED TO DENSIFY A CONTINUOUSLY MOVING WEB OF PAPER HAVING A VARIABLE CROSS DIRECTION TEMPERATURE AND A CROSS DIRECTION CALIPER TO INDICATE THE CROSS DIRECTION THICKNESS OF THE PAPER AS IT LEAVES THE STACK, OF MEANS FOR CONTROLLING THE CROSS DIRECTION TEMPERATURE OF SAID WEB AS IT ENTERS THE STACK, COMPRISING A NUMBER OF NOZZLES ALIGNED ON A COMMON AXIS IN CLOSE PROXIMITY TO THE UPPER SURFACE OF THE WEB OF PAPER IN CORRESPONDING LONGITUDINAL POSITION TO THE CALIPER, EACH OF SAID NOZZLES HAVING AN INDEPENDENT CONTROL VALVE AND MEANS FOR DELIVERING AIR TO SAID NOZZLES, WHEREBY THE TEMPERTURE AT SELECTED POINTS IN THE CROSS DIRECTION OF THE PAPER WEB CAN BE CONTROLLED BY DIRECTING AIR FROM THE NOZZLE AGAINST THE WEB AC CORDING TO THE THICKNESS INDICATED BY THE CALIPER CORRESPONDING TO EACH NOZZLE.