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US 12,405,437 B2Granted
Fiber carrying structure with rip cord and related method
AssigneeCorning Research & Development Corporation
InventorsTerry Lee Ellis, Martin Cervantes Martinez, Ellen Anderson Stupka
Life of this patent
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Abstract
An optical fiber carrying structure that includes a jacket and a rip cord is provided. Optical fiber cables are used to transmit data over distance. Generally, large distribution cables that carry a multitude of optical fibers from a hub are sub-divided at network nodes into subunits. To remove a jacket of a subunit, the subunit may be provided with an access feature such as a rip cord. Described herein is a rip cord for use with optical fiber carrying structures.
Claims20
An optical fiber cable, comprising:
- a cable jacket having an outer surface defining an outermost surface of the optical fiber cable;
- and
- a subunit disposed within the cable jacket, the subunit comprising:
- a stack of optical fiber ribbons, each of the optical fiber ribbons comprising a respective plurality of optical fibers arranged in a planar configuration;
- a subunit jacket that surrounds and is substantially conformal to the stack of optical fiber ribbons;
- and
- a water-blocking yarn disposed within the subunit jacket, the water-blocking yarn having a break strength less than 75 N;
- wherein the water-blocking yarn extends longitudinally along an outer surface of the stack of optical fiber ribbons within the subunit jacket, and wherein the stack of optical fiber ribbons twists around a longitudinal axis of the subunit jacket along a length of the subunit jacket.
5 more elements
An optical fiber cable, comprising:
- a plurality of subunits, wherein each of the subunits comprises:
- a stack of optical fiber ribbons;
- a subunit jacket that is substantially conformal to the stack of optical fiber ribbons;
- and
- a water-blocking yarn disposed within the subunit jacket and having a break strength of less than 75 N;
- and
- a cable jacket having an outer surface that defines an outermost surface of the optical fiber cable, the plurality of subunits disposed within the cable jacket;
- wherein the water-blocking yarn comprises fibers of PET polyester or liquid crystal polymer;
- wherein the water-blocking yarn extends longitudinally along an outer surface of the stack of optical fiber ribbons within each subunit jacket of the plurality of subunits;
- and
- wherein the stack of optical fiber ribbons of each subunit of the plurality of subunits twists around a longitudinal axis of the subunit jacket along a length of the subunit jacket.
8 more elements
A cable, comprising:
- a cable jacket;
- and
- a subunit that comprises:
- a stack of optical fiber ribbons, wherein each of the optical fiber ribbons comprises a plurality of 200-micron-diameter optical fibers;
- a subunit jacket that surrounds and is substantially conformal to the stack of optical fiber ribbons;
- and
- a water-blocking rip cord that is disposed within the subunit jacket and that has a break strength of less than 75 N, wherein further the subunit jacket has less than 0.1 grams, per meter of the subunit, of a water-blocking powder distributed therein and unattached to the water-blocking rip cord or any other water-blocking yarn or tape;
- wherein the water-blocking rip cord is characterized by a denier in a range of 150 to 275.
5 more elements
Dependencies are inferred from the claim text.