Longitudinal water-tight light waveguide cable and the method of manufacture
AssigneeSiemens Aktiengesellschaft
InventorsGerhard Lange, Helmut Saller
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Abstract
The invention relates to a cable, particularly to a light waveguide cable, in which at least one conductor, particularly a fiber-shaped light waveguide, is arranged in the interior of a protective sheathing and the remaining inside space is filled out with a gel-like substance. The substance consists of a mixture comprising an oil and a thixotropic agent.
Claims31
In a light waveguide cable having at least one fiber-shaped light waveguide being arranged in an interior of a protective sheath and the remaining inside space of the sheath being filled with a gel-like substance, the improvement being said gel-like substance being a mixture of an oil, an organic thickener and a thixotropic agent, said thickener comprising polymers selected from a group consisting of halogenated hydrocarbon polymers, halogen-free hydrocarbon polymers and mixtures of halogenated and halogen-free hydrocarbon polymers.
In a method of manufacturing a light waveguide cable having at least one fiber-shaped light waveguide being arranged in an interior of a protective sheath and the remaining inside space of the sheath being filled with a gel-like substance comprising a mixture of an oil and a thixotropic agent, said method comprising extruding the protective sheath on the waveguide, the improvement comprising creating a mixture of an oil, an organic thickener and a thixotropic agent, and injecting the mixture under pressure through a hollow needle in to the sheath during the step of extruding so that the mixture solidifies after said injection.
Dependencies are inferred from the claim text.