Wind-up method and apparatus

Claim 1

IN A METHOD OF PRODUCTING A ROOL OF THERMOPLASTIC PRODUCT BY DRY EXTRUDING IN NON-SELF-SUSTAINING CONDITION HEATED SYNTHETIC RESINOUSD THERMOPLASTIC SEAMLESS TUBING OF A SIZE SMALLER THAN THAT FINALLY DESIRED, PASSING THE EXTRUDED TUBING OVER A COOLING FORMER OF THE SIZE AND CONTOUR DESIRED IN THE FINAL KTUBING, MAINTAINING A SUBSTANTIALLY CONSTANT LOW PRESSURE GASEOUS MEDIUM IN THE TUBING BETWEEN THE POINTS OF EXTRUSION AND COOLING AT A PRESSURE TO PREVENT COLLAPSE ONLY OF THE TUBING SAID PRESSURE HAVING TO SUBSTSANTIAL EFFECT IN MODIFYING THE SHAPE OF THE TUBING AND INTRODUCING A COOLING FLUID INTO SAID COOLING FORMER TO SET THE TUBING PASSING THEREOVER TO SET CONDITION OF SIZE AND CONTOUR DERTIMINED BY THE CONFIGURATION OF THE COOLING FORMER, THE STEPS OF CONVERTING SAID EXTRIDED SET TUBING INTO A CONTINUOUS FLAT THINK-WALLED THERMOPLASTIC PRODUCT HAVING A TENDENCY TO WRINKLE, WINDING SAID PRODUCT INTO ROLL AT A DISTANCE FROM PRODUCTION OF SAID FLAT THIN-WALLED PRODUCT, PHYSICALLY SUPPORTING SAID THIN-WALLED PRODUCT BY SUBSTANTIALLY CONTINUOUS SURFACE SUPPORT AT ALL TIMES SO THAT THE EXTRUDED THERMOPLASTIC IS SUBSTANTIALLY NEVER UNSUPPORTED IN AIR BETWEEN PRODUCTION AND WIND-UP WHILE UNDER TENSION AND IN UNRELAXED AND UNWRINLED CONDITION WHEREBY THE PRODUCT DOES NOT RELAX AND WRINKLE, AND HEATING THE PRODUCT DURING WIND-UP TO A TEMPERATURE ATG WHICH IT IS STILL SOLID BUT DOES NOT STICK DURING THE SUPPORTING AND WIND-UP OPERATIONS.