Control method and apparatus

Claim 1

A CONTROL APPARATUS TO MAINTAIN A CERTAIN TEMPERATURE AND MOISTURE CONTENT RELATIONSHIP BETWEEN AN UPPER SINGLE FACE MOIST BOARD AND A LOWER MOIST LINER MOVING THROUGH A CORRUGATING MACHINE, COMPRISING A FIRST TEMPERATURE SENSING MEANS POSITIONED ADJACENT SAID UPPER SINGLE FACE BOARD AND BEING OPERABLY CONNECTED TO SEND A FIRST ELECTRICAL SIGNAL THAT IS PROPORTIONAL TO THE TEMPERATURE OF SAID BOARD TO A FIRST CONTROLLER, A SECOND TEMPERATURE SENSING MEANS POSITIONED ADJACENT SAID LOWER LINER AND BEING OPERABLY CONNECTED TO SEND A SECOND ELECTRICAL SIGNAL THAT IS PROPORTIONAL TO THE TEMPERATURE OF SAID LOWER LINER TO A SECOND CONTROLLER, AN ADJUSTABLE PRESSURE REGULATING MEANS HAVING TWO RATIO RELAYS OPERABLY CONNECTED THEREWITH TO TRANSMIT AN ADJUSTABLE SET POINT SIGNAL OF INCREASED MAGNITUDE TO ONE OF SAID CONTROLLERS WHILE IT SIMULTANEOUSLY TRANSMITS A SET POINT SIGNAL OF DECREASED MAGNITUDE TO THE OTHER OF SAID CONTROLLERS, EACH OF SAID CONTROLLERS BEING RESPONSIVE TO DIFFERENCES IN THE MAGNITUDE OF ITS ASSOCIATED ELECTRIC AND SET POINT SIGNALS, SAID CONTROLLER RECEIVING SAID SET POINT SIGNAL OF INCREASED MAGNITUDE BEING CONNECTED TO TRANSMIT A CONTROL SIGNAL TO A FIRST WRAP-ARM ACTUATING MOTOR TO THEREBY CAUSE A WRAP ARM AND ROLLER UNIT ATTACHED TO THE SHAFT OF SAID MOTOR TO BE ROTATED IN A DIRECTION TO MOVE A PORTION OF SAID MOVING SINGLE FACE BOARD INTO INCREASED SURFACE CONTACT WITH A FIRST HEATER ROLL AND SAID CONTROLLER RECEIVING SAID SECOND SET POINT SIGNAL OF DECREASED MAGNITUDE BEING OPERABLY CONNECTED TO SIMULTANEOUSLY TRANSMIT A CONTROL SIGNAL TO A SECOND WRAP ARM ACTUATING MOTOR TO THEREBY CAUSE A WRAP ARM AND ROLLER UNIT ATTACHED TO THE SHAFT OF SAID LAST MENTIONED MOTOR TO BE ROTATED IN A DIRECTION TO MOVE A PORTION OF SAID LOWER MOIST LINER INTO A DECREASED SURFACE CONTACT WITH A SECOND HEATER ROLL.