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AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorRaymond Le Diouron
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The cable C to be stripped is wound with non-touching coils and crossed layers of cable onto a drum 6 having a perforated core 10 rotatively mounted in a thermally insulated container 1. By injecting into the container liquid nitrogen under the control of a temperature sensor and by circulating the gases contained in the container through the core of the drum and the cable coils, the whole of the cable is cooled down to a temperature at which the plastics coating and, as the case may be, the outer steel sheath of the cable become brittle. The cable is then unwound and, when it has left the container, it is subjected to various mechanical stresses. The stripped cable is finally wound onto a take-up reel 3. Application in the recovery of scrap in the manufacture of power cables of large diameter and recovery of used electric cables.
A method for effecting a cryogenic stripping of an electric cable or the like comprising at least a sheath which is brittle at low temperature and a metal core deformable at said temperature, said method comprising cooling the cable with a cryogenic agent in a container, subjecting the cable to mechanical stresses at the outlet of said container and winding the cable on to a take-up reel, the whole of the cable to be stripped being cooled in said container and the extraction of the cable from the container being commenced when the sheath has reached a temperature at which the sheath becomes brittle.
An apparatus for effecting a cryogenic stripping of electric cables or the like, comprising a cooling container, means for feeding cryogenic agent to the container, a drum operably associated with said container for receiving the cable to be stripped wound thereon, means operably associated with said container for rotatably mounting the drum inside the container, the container having an outlet for cable unwound from the drum, means for mechanically stressing the cable located adjacent said outlet thereby to strip from the cable material rendered brittle by said cryogenic agent in said container, and a take-up reel for the stripped cable located adjacent said stressing means.
Dependencies are inferred from the claim text.