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AssigneeIndustrie Pirelli S.p.A.
InventorPaolo Gazzana Priaroggia
Estimating the term…
A process for sheathing a cable core with metal in which the core is immersed in oil in a container and is transferred from the container to the sheath extruder in a siphon tube in which oil flows in a direction opposite to the direction of movement of the core. From the extruder, the metal sheathed core is transferred to a drum and during such transfer the core is subjected to oil under pressure. Prior to inserting the core in the siphon tube, the latter is evacuated and filled with degassed oil. The apparatus comprises a stainless steel siphon tube with one end in the container and the other end connected to the extruder. The siphon tube has a higher intermediate portion to which a piezometric column and a pump are connected and has a coupling adjacent the extruder for supplying degassed oil to the siphon tube.
Apparatus for sheathing an impregnated core having a conductor surrounded by insulation and at least one oil passageway in said core, said apparatus comprising a container for said core, an extruder spaced from said container for extruding a metal sheath on said core, a siphon tube extending from said container to said extruder and connected at one end to said extruder and having a free end at said container, said tube having a portion intermediate its ends which is higher than said ends, a piezometric tube connected to and extending above said portion, pump means connected to said piezometric tube for evacuating the latter and said siphon tube, a source of degassed oil, coupling means on said siphon tube for connecting said source of degassed oil to said siphon tube and means for closing said free end of said siphon tube to permit the evacuation thereof.
Dependencies are inferred from the claim text.