Retreading apparatus

Claim 1

IN APPARATUS FOR RETREADING TIRES INCLUDING A STREAM HEATED MOLD IN WHICH A TIRE IS PLACED, A MATRIX IN THE MOLD SURROUNDING THE TIRE AND AN EXPANSIBLE CHAMBER WITHIN THE TIRE, THE COMBINATION OF A STEAM SUPPLY CONDUIT FOR THE EXPANSIBLE CHAMBER, AN AIR SUPPLY CONDUIT FOR THE EXPANSIBLE CHAMBER, A SOURCE OF STEAM UNDER PRESSURE FOR THE STEAM SUPPLY CONDUIT, A SOURCE OF AIR UNDER A HIGHER PRESSURE FOR THE AIR SUPPLY CONDUIT, A Y FITTING TO WHICH THE AIR AND STEAM SUPPLY CONDUITS ARE BOTH CONNECTED AT ACUTE ANGLES TO EACH OTHER AND WHICH MERGE INTO A SINGLE CONDUIT CONNECTED TO THE EXPANSIBLE CHAMBER, A VALVE CONTROLLING THE ADMISSION OF STEAM TO THE STEAM SUPPLY CONDUIT, A VALVE OPERATIVE RESPONSIVE TO A PREDETERMINED INTERVAL OF TIME CONTROLLING THE ADMISSION OF AIR TO THE AIR SUPPLY CONDUIT, AND A CHECK VALVE IN BOTH THE AIR SUPPLY CONDUIT AND THE STEAM SUPPLY CONDUIT BETWEEN SAID FIRST MENTIONED VALVES AND THE Y FITTING OPERATIVE TO PREVENT A BACK FLOW THROUGH SAID CONDUITS.