Apparatus for hot-sheathing electric cables with tubular metal sheaths

Claim 1

APPARATUS FOR HOT-SHEATHING ELECTRIC CABLES WITH A TUBULAR METAL SHEATH CONSISTING OF AN EXTRUSION PRESS COMPRISING IN COMBINATION A SUBSTANTIALLY VERTICAL PRESS CYLINDER BUILT UP OF AN OUTER CASING RESISTANT TO INTERNAL PRESSURE, MEANS SUPPLYING COMPRESSED GAS TO SAID CYLINDER, A REFRACTORY CRUCIBLE WITHIN THE SAID CASING, AND A POROUS LAYER CONSISTING OF REFRACTORY MATERIAL GROUND INTO GRANULES INTERPOSED BETWEEN THE CRUCIBLE AND THE CASING AND IN CONTACT WITH THE OUTER SURFACE OF THE CRUCIBLE, THE SAID POROUS LAYER BEING SUBJECTED TO THE PRESSURE OF THE GAS IN THE CRUCIBLE SO AS TO APPROXIMATELY BALANCE THE PRESSURES ACTING ON THE OUTER AND INNER SURFACES OF THE CRUCIBLE, HEATING MEANS OPERATIVE TO MAINTAIN EXTRUSION METAL WITHIN SAID CYLINDER IN A MOLTEN CONDITION, MEANS FOR INTRODUCING GAS UNDER PRESSURE INTO THE UPPER PART OF SAID CYLINDER, AND EXTRUSION NOZZLE IN COMMUNICATION WITH SAID CYLINDER AND MEANS FOR THE CIRCULATION OF A COOLING MEDIUM IN OPERATIVE RELATIONSHIP WITH SAID NOZZLE.