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US 4,187,391 AGranted
High frequency coaxial cable and method of producing same
AssigneeKupferdraht-Isolierwerk AG Wildegg
InventorOthmar Voser
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AssigneeKupferdraht-Isolierwerk AG Wildegg
InventorOthmar Voser
Estimating the term…
A high frequency coaxial cable suitable for aerial and ultra-high-frequency lines of the type having a metal internal conductor, a plastic dielectric concentrically surrounding the internal conductor, an external conductor surrounding the dielectric and comprising a metal wire mesh and a plastic foil strip metallized on at least one side, and a plastic sheath enveloping the external conductor as an external protective cover, wherein the wires of the wire mesh are arranged in net-like configuration to define an open wire mesh enclosing the dielectric and the plastic foil strip is applied on the wire mesh in helical edgewise overlapping windings with its metallized side facing the wire mesh and is pressed into each single mesh opening of the wire mesh in form of a generally trough-like dent or dimple thereby short-circuiting each single mesh opening of the wire mesh. The plastic foil strip is preferably pressed into the wire mesh opening during the application of the plastic sheath by extruding the latter under high pressure.
A high frequency coaxial cable for aerial and ultra-high-frequency lines, comprising a metal internal conductor, a plastic dielectric concentrically surrounding the internal conductor, an external conductor surrounding the dielectric and comprising a metal wire mesh and a plastic foil strip metallised on at least one side, and a plastic sheath enveloping the external conductor as an external protective cover, the wires of said wire mesh being arranged in netlike configuration to define an open wire mesh deposited on the dielectric and said plastic foil strip being applied on the wire mesh in helical edgewise overlapping windings with said metallised side facing the wire mesh and being pressed into each single mesh of the wire mesh in the form of a generally trough-like dent thereby short-circuiting each single mesh of the wire mesh.
A method of producing a high frequency coaxial cable for aerial and ultra-high-frequency lines comprising the steps of applying around a metal internal conductor a plastic dielectric concentrically surrounding the internal conductor, applying around said plastic dielectric an external conductor comprising a metal wire mesh and a plastic foil strip metallised on at least one side, said metal wire mesh being applied in form of an open wire mesh by arranging the wires thereof in netlike configuration and said plastic foil strip being applied on said mesh by winding the plastic foil strip with its metallised side facing the wire mesh in the form of helical edgewise overlapped windings on the wire mesh, and applying on said windings of the metallised plastic foil strip a plastic sheath as an external protective cover by extrusion under pressure of sufficient magnitude as to press the metallised plastic foil into each single mesh of the netlike wire mesh in the form of a generally trough-like dent and to fill these trough-like dents with material of the plastic sheath thereby providing the internal surface of the plastic sheath with generally knob-shaped projections fitting into said trough-like dents.
Dependencies are inferred from the claim text.