Continuous manufacture of reinforced hose

The method of producing elastomeric reinforced hose which comprises the steps of continuously extruding through an annular extrusion orifice an inner elastomeric tube, progressively cooling said tube, progressively applying to the outer surface thereof a reinforcement of filamentary material including a strand of elastic material paralleling the tube axis, progressively subjecting the reinforced tube to external vacuum while extruding over its outer surface an elastomeric covering layer, bonding said layer to the inner tube through interstices in the reinforcement, passing the covered tube progressively through a zone of heat treatment to impart vulcanizing heat to the elastomeric components thereof and maintaining an attenuating longitudinal stress in the covered tube to progressively elongate the same and said strand to an extent substantially corresponding to the elongation possible within the elastic limits of said strand until the elastomeric components of the hose have been vulcanized, progressively withdrawing the hose from the zone of heat treatment while continuing to subject it to longitudinal tension, said longitudinal tension exerting an attenuating stress imposing upon the hose elongation of approximately 40% in relation to the length of inner tube issuing from the first extrusion orifice and finally relieving said tension and separating the hose into pieces of finite length.