Patent ID: 7247797

Claim:
Communication cable comprising: a plurality of conductor cores that are insulated conductors, in which the conductor cores are stranded with one another to form stranded elements, a plurality of which are combined in a cable core, and in which the cable core is surrounded by at least one sheath of insulating material, wherein the insulation of the conductors is an inner layer of a flameproof insulating material and an outer layer, which is made from a polyolefin, produced by extrusion, and adheres to the inner layer; said inner layer includes two ribbons of flameproofing insulating material wound one above the other around said conductor with overlapping edges; said extruded outer layer is formed of halogen-free, flame resistant material; a closed inner sheath that is a metallic strip applied over the cable core which is coated one side with a co-polymer that serves as an adhesion promoter; said outer sheath, which is an noncombustible material, applied over the inner sheath, with which it is adhesively bonded and that the coated side of the metallic strip of the inner sheath faces the outer sheath in the finished cable so that the outer sheath is adhesively bonded to the inner sheath.