Patent ID: 7175411

Claim:
An apparatus for the production of a cable having at least one covering layer consisting of a composition comprising at least one polymeric material and a mineral filler in a quantity greater than 30% by weight relative to the total weight of the composition, said apparatus comprising: at least one charging hopper for feeding the polymeric material and said mineral filler, optionally premixed together or with other components of said composition; at least one extruder comprising at least one filtration section, at least one extrusion screw, and at least one extrusion head inside of which is contained a die for the purpose of fitting said covering layer around at least one conducting element of said cable; at least one device for unwinding said conducting element; and at least one device for winding said cable, wherein the at least one filtration section of said extruder has a filter support plate comprising an internal surface and a plurality of elements, which protrude therefrom and define a plurality of sectors between and within which the filtered composition flows, and wherein said plurality of sectors define at least one pathway to direct the filtered composition to a central passage of the filter support plate.