Method of making an inflatable catheter

Claim 1

IN THE METHOD OF FORMING AN INFLATABLE CATHEETER OF EXTENDED LENGTH HAVING TWO LUMENS, EACH EXTENDING SUBSTANTIALLY THE LENGTH OF THE CATHETER, THE STEPS OF POSITIONING AN EXTENDED LENGTH FORM LONGITUDINALLY OF THE CATHETER TO PROVIDE ONE OF THE LUMENS, POSITIONING A CORE OF AN EXTENDED LENGTH WITH A LATERAL ARM AT ITS END LONGITUDINALLY OF THE CATHETER IN ADJACENCY AND SPACED FROM SAID FORM SO THE CORE AND FORM ARE GENERALLY COEXTENSIVE, POSITIONING MEANS AT INTERVALS BETWEEN SAID CORE AND ORM ALONG THEIR LENGTHS TO SPACE THE COE AND FORM A DISTANCE SUFFICIENT TO PROVIDE A WALL BETWEEN THEM OF SUFFICIENT THICKNESS TO PREVENT COLLAPSING UNDER INFLATION PRESSURE OF THE CATHETER, PROVIDING A MOLD WITH A MOLD CAVITY OF EXTENDED LENGTH WHICH CAVITY HAS AN END WALL, LOCATING SAID CORE AND FROM IN SPACED RELATION TO SAID END WALL AND THE LONGITUDINAL WALLS OF THE CAVITY AND WITH SAID LATERAL ARM AT ONE END OF SAID CORE POSITIONED IN A RECESS IN SAID MOLD OUTSIDE SAID CAVITY, PROVIDING MEANS AT THE OTHER END OF SAID CORE TO SNUGLY FIT THE CAVITY, SAID FORM HAVING ITS END DISTANT FROM THE END WALL OF THE CAVITY EXTENDING OUTSIDE SAID CAVITY, INJECTING MATERIAL IN A SINGLE STEP INTO THE CAVITY ABOUT THE ENTIRE LENGTH OF SAID CORE AND FORM TO PROVIDE A BODY AND ALSO PROVIDE BETWEEN SAID CORE AND FORM A WALL AND THEN WITH DRAWING SAID CORE AND FORM FROM THE MOLDED MATERIAL TO PROVIDE TWO LUMENS WITH A WALL BETWEEN THEM.