Polyurethane jacketing of metal sheathed cable
AssigneeNorthern Electric Company Limited
InventorLeo Victor Woytiuk
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Abstract
A method of jacketing an electric cable having a corrugated metal sheath, in which the sheath is cleaned, a coating of thermosetting, castable polyurethane is applied to fill the troughs in the corrugations, a fabric is wrapped onto the coated sheath and coated with the same polyurethane, and thermoplastic polyurethane is extruded onto the cable to form a jacket. The coatings of the polyurethane serve as an adhesive for bonding the jacket to the metal sheath. A cable produced by this method comprises a layer of fabric circumscribing the corrugated metal sheath and a jacket of thermoplastic polyurethane overlying the sheath, the fabric being embedded in a layer of thermosetting, castable polyurethane bonding the jacket to the sheath.
Claims3
In an electric cable having a core and a corrugated metal sheath, a layer of fabric circumscribing the sheath and embedded in thermosetting polyurethane resin, and a jacket of thermoplastic polyurethane resin circumscribing the sheath and overlaying the layer of fabric, and thermosetting polyurethane bonding the jacket to the sheath.
Dependencies are inferred from the claim text.