Method and apparatus for making laminated conveyor belting

Claim 1

IN THE MANUFACTURE OF CONVEYOR BELTING COMPRISING A PLURALITY OF FABRIC PLIES BONDED TOGETHER BY POLYVINYL CHLORIDE ALONG MEETING FACES, THE STEPS WHICH COMPRISE SIMULTANEOUSLY UNCOILING FABRIC PLIES IMPREGNATED WITH POLYVINYL CHLORIDE FROM THE COILS THEROF, APPLYING TO EACH PLY A POSITIVE FORWARD FEEDING FORCE AND IN SO DOING SETTING UP TENSION IN A LENGTH THEREOF, HEATING THE PLIES WHILE UNDER SAID TENSINAND OUT OF CONTACT WITH EACH OTHER TO A TEMPERATURE SUFFICIENT FOR THE PLKIES TO WELD TOGETHER WHEN PRESSED INTO CONTACT WITH EACH OTHER, FORMING THE PLIES WHILE STILL AT SAID WELDING TEMPERATURE INTO AN ASSEMBLYAND CALENDERING SAID ASSEMBLY BETWEEN CALENDERING SURFACES TO CONSOLIDATE IT, COOLING SAID CALENDERING SURFACES, APPLYING APARTING LIQUID TO THE OUTSIDE OF EACH OUTER PLY AND THE CALENDERING SURFACE WITH WHICH IT MAKES CONTACT, PASSING THE RESULTANT CONSOLICATED ASSEMBLY IMMEDIATELY ATER CALENDERING ONTO A TRAVELLING SURFACE, AND CONVEYING SAID ASSEMBLY IN A FLAT CONDITION ON SAID TRAVELING SURFACE WITHOUT EXERTING PRESSURE ON THE ASSEMBLY UNTIL THE ASSEMBLY IS COOL, THE POSITIVE FEEDING FORCE BING APPLIED TO THE PLIES BETWEEN THE COILS AND THE POINT AT WHICH THE PLIES ARE FORMED INTO AN ASSEMBLY.