Method and apparatus for making optical fiber cable element

Textiles: spinning – twisting – and twining – Apparatus and processes – Covering or wrapping

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57 6, 57 7, 156 51, 156 53, 156172, G02B 516, H01B 1302

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active

043958699

ABSTRACT:
Methods and apparatus for forming a cable element comprising a core of plastic material with helical surface grooves containing one or more optical fibers. The core has one or more reinforcing elements resistant to tension and compression and is covered with a covering of tape or thermoplastic. The core is fed to a rigid body having tongues corresponding to and entering into the grooves, and the optical fiber or fibers are fed into the grooves through through-holes in the body which extend from the exterior surface of the body to the tongues and which are inclined with respect to the axis of the core. The core feeding means may be a pay-off bobbin or a core extruder with a threading die, and by increasing the feed rate of the fibers relative to the feed rate of the core or by stretching the core in advance of the rigid body, the lengths of the fibers in the grooves may be longer than the lengths of the grooves.

REFERENCES:
patent: 4156624 (1979-05-01), de Vecchis et al.
patent: 4237687 (1980-12-01), de Vecchis et al.
patent: 4325212 (1982-04-01), Hope
patent: 4347697 (1982-09-01), Hope et al.

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