Optical fiber cable having non-metallic sheath system

Abstract From the Canadian patent

Abstract, An optical fiber cable includes a core comprising at least one optical fiber which is enclosed in a tubular member and which includes a non-metallic sheath system. The sheath system includes two continuous layers of non-metallic strength members which extend longitudinally along the cable and which are wrapped helically in opposite directions about the tubular member. The layers of strength members are enclosed in a plastic jacket. At least some of the strength members which are capable of withstanding expected compressive as well as tensile loading are coupled sufficiently to the jacket to provide a composite arrangement which is effective to inhibit contraction. Those strength …