High-frequency data transmission cable and method and apparatus for fabricating it
AssigneeAlcatel
InventorChristian Kuczynski
Life of this patent
Estimating the term…
Abstract
A high-frequency data transmission cable includes a plurality of groups of twisted conductors and a sheath placed around the groups of twisted conductors delimiting an internal volume for housing the groups of twisted conductors. The groups of twisted conductors are placed at the periphery of the internal volume and are practically equidistant from each other. The internal volume contains, in addition to the groups of twisted conductors, a plastics material foam that holds the groups of twisted conductors in position. Applications include data transmission networks.
Claims13
A high-frequency data transmission cable comprising:
- a plurality of groups of twisted conductors, and
- a plastic outer sheath containing said groups of twisted conductors, said sheath delimiting an internal volume for housing said groups of twisted conductors in a spaced apart relationship with each other, and
- a plastics material foam which fills said internal volume of said sheath, said plastics material foam which holds said groups of twisted conductors as far apart as possible, said groups of twisted conductors being placed at a periphery of said internal volume and being substantially equidistant from each other.
A high-frequency data transmission cable comprising:
- a plurality of groups of twisted conductors, and
- a sheath placed around said groups of twisted conductors, said sheath delimiting an internal volume for housing said groups of twisted conductors,
- wherein said groups of twisted conductors are placed at the periphery of said internal volume and are substantially equidistant from each other, and
- said internal volume contains in addition to said groups of twisted conductors, a plastics material foam that fills said volume and holds said groups of twisted conductors in position, said plastics material foam being conductive.
A high-frequency data transmission cable comprising:
- a plurality of groups of twisted conductors;
- a sheath placed around said groups of twisted conductors, said sheath delimiting an internal volume for housing said groups of twisted conductors;
- and
- a plastics material foam which fills said internal volume of said sheath, said plastics material foam which holds said groups of twisted conductors as far apart as possible, said groups of twisted conductors being placed at a periphery of said internal volume and being substantially equidistant from each other;
- wherein said plastics material foam does not adhere to said groups of twisted conductors and is relatively easily peeled away from said conductors.
A method of fabricating a data transmission cable including a plurality of groups of twisted conductors disposed in a sheath having an inside diameter, said method comprising:
- preparing an elongate cylindrical mold having an inside wall with an inside periphery and an inside peripheral surface, with a diameter substantially equal to the inside diameter of said sheath,
- introducing a plurality of groups of twisted conductors at equidistant locations at the inside periphery of said mold at a first end of the mold and proximate to the wall of the mold,
- feeding a composition based on a plastics material adapted to form a foam into a first end of said mold and substantially at a center of the inside diameter thereof, said composition and conditions in said mold being such that said composition, as it expands in said mold to form said foam, pushes said groups of twisted conductors against said inside peripheral surface of said mold, and on leaving said mold, forms a member that retains its shape and that holds said groups of twisted conductors apart, and then
- applying a sheath at least to said member.
Dependencies are inferred from the claim text.