Method of manufacturing hose joint elements

Claim 1

METHOD OF MANUFACTURING A HOSE OF THE BELLAND-SPIGOT TYPE, COMPRISING ON THE ONE HAND AN EXTERNAL BELL AND AN INTERNAL TUBULAR NIPPLE, AND OF SECURING SAID BELL ON A BASE END COMPRISING A REINFORCING MESH STRUCTURE EMBEDDED IN AN EXTERNAL LAYER AND AN INNER LAYER OF FLEXIBLE MATERIAL, THIS METHOD COMPRISING THE STEPS OF: IMPARTING TO SAID EXTERNAL BELL THE SHAPE OF A CYLINDRICAL SKIRT PROVIDED WITH A FRUSTOCONICAL INNER FLANGE; FORMING IN THE INNER WALL OF SAID SKIRT A PLURALITY OF RETAINING GROOVES; MACHINING A TUBULAR NIPPLE BY FORMING AN EXTERNAL PERIPHERAL GROOVE THEREIN; INSERTING SAID NIPPLE INTO THE OPENING OF SAID INNER FRUSTOCONICAL FLANGE OF SAID BELL; CRIMPING THE INNER EDGE OF SAID FLANGE INTO THE EXTERNAL GROOVE OF SAID NIPPLE; STRIPPING THE HOSE END BY REMOVING SAID EXTERNAL LAYER OF FLEXIBLE MATERIAL; INSERTING SAID STRIPPED END OF SAID HOSE INTO THE SPACE FORMED BETWEEN SAID SKIRT AND SAID NIPPLE; CRIMPING SAID SKIRT ON SAID HOSE END AND SAID NIPPLE UNTIL SAID END IS ANCHORED IN SAID RETAINING GROOVES IN ORDER TO SEAL THE JOINT BETWEEN SAID BELL AND NIPPLE AND SAFELY HOLD SAID HOSE WITHIN SAID BELL.