Strength member system for fiber optic cable
First Claim
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1. A fiber optic cable, comprising:
- a central strength member coaxially located within the fiber optic cable;
a layer of polyethylene contacting the exterior of the strength member;
a water-swellable yarn wound around the strength member, between the strength member and the layer of polyethylene; and
buffer tubes supporting optical fibers,wherein the layer of polyethylene is an overcoat completely surrounding both the central strength member and the yarn in the circumferential direction such that together the central strength member and the overcoat form a guide over which the buffer tubes are stranded.
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Abstract
A fiber optic cable includes a strength member, a layer of polyethylene contacting the exterior of the strength member, and a yarn wound around the strength member. The yarn is between the strength member and the layer of polyethylene.
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Citations
15 Claims
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1. A fiber optic cable, comprising:
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a central strength member coaxially located within the fiber optic cable; a layer of polyethylene contacting the exterior of the strength member; a water-swellable yarn wound around the strength member, between the strength member and the layer of polyethylene; and buffer tubes supporting optical fibers, wherein the layer of polyethylene is an overcoat completely surrounding both the central strength member and the yarn in the circumferential direction such that together the central strength member and the overcoat form a guide over which the buffer tubes are stranded. - View Dependent Claims (2, 3, 4, 5)
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6. A method of manufacturing a fiber optic cable, comprising steps of:
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winding a water-swellable yarn around a strength member; coating the strength member with a layer of polyethylene contacting the exterior of the strength member, wherein the yarn is between the strength member and the layer of polyethylene and the layer of polyethylene is an overcoat completely surrounding both the central strength member and the yarn in the circumferential direction; and stranding buffer tubes, which are supporting optical fibers, around a guide formed by the overcoat, the yarn, and the central strength member. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A fiber optic cable, comprising:
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a guide, comprising; a glass-reinforced plastic rod having a longitudinal axis extending in parallel or co-linearly with a longitudinal axis of the fiber optic cable, a first water-swellable yarn helically wound around the rod; and a polymer overcoat overlaying and completely surrounding both the first yarn and the rod in the circumferential direction; a second water-swellable yarn helically wound around the exterior of the guide; buffer tubes stranded around the guide and overlaying the second yarn, wherein the buffer tubes support optical fibers; and a polymer jacket overlaying the buffer tubes. - View Dependent Claims (14, 15)
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Specification