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US 4,629,522 AGranted
Sealing communication cable
AssigneeKabelmetal Electro GmbH
InventorsWolfram Klebl, Karl-Heinz Marx, Arnold Vogts, Friedrich Schatz, Guenter Titze
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AssigneeKabelmetal Electro GmbH
InventorsWolfram Klebl, Karl-Heinz Marx, Arnold Vogts, Friedrich Schatz, Guenter Titze
Estimating the term…
A viscous sealing material is applied to a communications cable by being forced out of a container by means of a heatable pressure plate having a bore and a pump adjacent to the bore; the sealing material is conveyed by the pump through a conduit to a chamber, in which the sealing material is introduced under pressure into and around an already stranded cable core; the pressure plate includes a plurality of preferably helically coil electrical heating elements separated from each other and projecting therefrom for penetrating into the sealing material in the container when the pressure plate applies pressure to the sealing material so that it is progressively liquified and can be pumped out of the container.
Apparatus for producing a longitudinally water-tight communications cable with plastics-insulated conductors, in which cable the cavities of the cable core are filled with a sealing material, including a chamber in which the sealing material is introduced under pressure into and around an already-stranded cable core, and also including a container filled with the sealing material, there being a pressure plate for applying pressure to the sealing material in the container, there being a bore in the plate and a pump in or in the vicinity of the bore, and conduit means for feeding material when liquified to the chamber, the improvement comprising:
In a method of forcing a normally highly viscous sealing material into the cavities of a communications cable, wherein the sealing material being located in a container is pressurized and heated to lower its viscosity, and pumped out of the container for delivery to a chamber for application to the cable, the method comprising:
Dependencies are inferred from the claim text.