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Fiber-optic-cable-product-and-associated-fabrication-method-and-apparatus

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Fiber optic cable product and associated fabrication method and apparatus

Details

Inventors: Blazer, Bradley J.; McAlpine, Warren W.; Clarke, Mary Ann; Townsend, Bruce E.; Cooke, Harriet G.;
Assignee: Corning Cable Systems, LLC (Hickory, NC)
Primary Examiner: Sanghavi; Hemang
Assistant Examiner: Knauss; Scott
Attorney, Agent or Firm: Aberle; Timothy J.

A fiber optic cable product is provided that includes a strength member and an elongate cable core surrounding and mechanically coupled to the strength member. The cable core defines a number of lengthwise extending slots for receiving optical fibers and a number of voids proximate the strength member that also typically extend lengthwise therethrough. The fiber optic cable product is therefore relatively lightweight and flexible. In order to insure that the mechanical properties of the fiber optic cable product are uniform, the cable core typically defines the voids in a generally symmetrical manner about the central strength member. A method and an apparatus for extruding a fiber optic cable product that includes a cable core defining a plurality of voids are also disclosed.

DETAILED DESCRIPTION In view of the foregoing, a fiber optic cable product according to one aspect of the present invention includes a strength member and an elongate cable core surrounding a and mechanically coupled to the strength member such that the strength member extends lengthwise therethrough, wherein the cable core defines a plurality of lengthwise extending slots and the cable core also defines a plurality of voids proximate the strength member and disposed in a symmetrical arrangement thereabout.
According to another aspect of the present invention, a fiber optic cable product includes a strength member and an elongate cable core surrounding and mechanically coupled to the strength member such that the strength member extends lengthwise therethrough, wherein the cable core defines a plurality of lengthwise extending slots and the cable core also defines a plurality of voids proximate the strength member and extending lengthwise through the cable core.
According to either aspect of the present invention, the fiber optic cable product is advantageously lighter and more flexible than a conventional fiber optic cable product of the same size and construction as a result of the plurality of voids defined by the cable core.
A method for forming a fiber optic cable product is also provided according to another aspect of the present invention and includes the steps of providing a lengthwise extending strength member and extruding a cable core around the strength member such that the cable core is mechanically coupled thereto, wherein the extruding step includes the steps of defining a plurality of voids proximate the strength member and extending lengthwise through the cable core and defining a plurality of outwardly opening slots extending lengthwise along the cable core.
The extrusion of the cable core can be performed in either one step in which the slots and the voids are formed concurrently, or in two steps in which an inner portion of the cable core that defines the voids can be extruded prior to extruding thereabout an outer portion of the cable core that defines the slots

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