Method of making coaxial cable
First Claim
1. A method of making a coaxial cable comprising the steps of:
- advancing along a predetermined path of travel a cable core comprising a conductor and an expanded foam dielectric surrounding the conductor;
directing an elongate strip of copper onto the advancing cable core and bending the copper strip into a generally cylindrical form so as to loosely encircle the core;
moving opposing longitudinal edges of the thus formed copper strip into abutting relation and forming a longitudinal weld joining the abutting edges to thereby form an electrically and mechanically continuous tubular copper sheath loosely surrounding the cable core;
simultaneously advancing the cable core and the surrounding sheath while deforming the tubular sheath into an oval configuration loosely surrounding the core, the oval configuration having a major axis generally aligned with the longitudinal weld of said sheath;
directing the longitudinal weld of the advancing sheath against a scarfing blade and scarfing weld flash from the sheath; and
sinking the advancing copper sheath onto the advancing cable core.
8 Assignments
0 Petitions
Accused Products
Abstract
A method of making a flexible coaxial cable is provided. The method comprises advancing a cable core comprising a conductor and an expanded foam dielectric surrounding the conductor along a predetermined path of travel, directing an elongate strip of copper onto the advancing cable core and bending the copper strip into a generally cylindrical form so as to loosely encircle the core. Opposing longitudinal edges of the thus formed copper strip are then moved into abutting relation and a longitudinal weld is formed joining the abutting edges to thereby form an electrically and mechanically continuous tubular copper sheath loosely surrounding the cable core. The cable core and the surrounding sheath are simultaneously advanced while the tubular sheath is deformed into an oval configuration loosely surrounding the core. The longitudinal weld of the advancing sheath is then directed against a scarfing blade and weld flash from the sheath is scarfed from the sheath. The advancing copper sheath is sunk onto the advancing cable core to form the coaxial cable. A polymer composition may be extruded around the copper sheath to form a protective jacket surrounding the coaxial cable and may be bonded thereto. The present invention also includes a flexible coaxial cable having excellent electrical and bending properties.
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Citations
14 Claims
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1. A method of making a coaxial cable comprising the steps of:
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advancing along a predetermined path of travel a cable core comprising a conductor and an expanded foam dielectric surrounding the conductor; directing an elongate strip of copper onto the advancing cable core and bending the copper strip into a generally cylindrical form so as to loosely encircle the core; moving opposing longitudinal edges of the thus formed copper strip into abutting relation and forming a longitudinal weld joining the abutting edges to thereby form an electrically and mechanically continuous tubular copper sheath loosely surrounding the cable core; simultaneously advancing the cable core and the surrounding sheath while deforming the tubular sheath into an oval configuration loosely surrounding the core, the oval configuration having a major axis generally aligned with the longitudinal weld of said sheath; directing the longitudinal weld of the advancing sheath against a scarfing blade and scarfing weld flash from the sheath; and sinking the advancing copper sheath onto the advancing cable core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of making a coaxial cable comprising the steps of:
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advancing a conductor into and through an extruder and extruding thereon a foamable polymer composition; causing the extruded polymer composition to foam and expand to form a cable core comprised of an expanded foam dielectric surrounding the advancing conductor; directing an elongate strip of copper onto the advancing cable core and bending the strip into a generally cylindrical form so as to loosely encircle the core; moving opposing longitudinal edges of the thus formed copper strip into abutting relation and forming a longitudinal weld joining the abutting edges to thereby form an electrically and mechanically continuous tubular copper sheath loosely surrounding the cable core; simultaneously advancing the cable core and the surrounding sheath while deforming the tubular sheath into an oval configuration loosely surrounding the core, the oval configuration having a major axis generally aligned with the longitudinal weld of said sheath; directing the longitudinal weld of the advancing sheath against a scarfing blade and scarfing weld flash from the sheath; simultaneously advancing the cable core and the surrounding sheath through at least one sinking die and sinking the copper sheath onto the cable core to cause compression of the foam dielectric of the core and to produce a coaxial cable; advancing the thus formed coaxial cable through an extruder and extruding a polymer composition around the copper sheath to form a protective jacket surrounding the coaxial cable. - View Dependent Claims (11, 12, 13, 14)
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Specification