Plastic and nonmetallic article shaping or treating: processes – Outside of mold sintering or vitrifying of shaped inorganic... – Including plural heating steps
Patent
1989-10-25
1991-05-14
Ullah, Akm
Plastic and nonmetallic article shaping or treating: processes
Outside of mold sintering or vitrifying of shaped inorganic...
Including plural heating steps
57 7, 264 15, 350 9634, G02B 644
Patent
active
050150634
ABSTRACT:
An optical fiber cable core (20) which is sold to a cable manufacturer for oversheathing or for incorporation into electrical power aerial cables, for example, includes in a preferred embodiment at least one bundle (23) of optical fibers (25--25). The at least one bundle is disposed in a tubular member (30) which is made of a plastic material suitable for use in relatively wide temperature range. The core is manufactured to cause a predetermined excess length of fiber to be disposed in the tubular member. The excess length of each fiber is such that it is sufficient to avoid undue strains on the fiber as the cable core is exposed to the elements and to forces imparted during handling such as during installation. On the other hand, the excess fiber length must not be so great as to result in undue curvature of the fiber or excessive interactive engagement of the fiber with an inner wall of the tubular member. Also, the plastic material of the tubular member must be such that it responds linearly to the application of tensile forces up to a strain corresponding to the excess fiber length at a given temperature.
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Panuska Andrew J.
Patel Parbhubhai D.
AT&T Bell Laboratories
Somers Edward W.
Ullah Akm
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