Optical fiber cable with large number of ribbon units containing

Details Optical fiber cable with large number of ribbon units containing Optical fiber cable with large number of ribbon units containing

1992-04-02

1993-07-20

Lee, John D.

Optical waveguides

Optical transmission cable

Ribbon cable

385112, 385113, G02B 644

Patent

active

052298515

ABSTRACT:
A plurality of optical fiber ribbons, each containing a plurality of optical fibers, are loosely enclosed in a substantially fluid impervious tube of plastic material. A plurality of such ribbon enclosing tubes are wound in S or Z fashion around a central structural member which can be covered with a plastic material. The so-wound tubes are encircled by threads or tape to hold them in place, and a covering of helically wound yarns is applied around the tubes to provide strength. A plastic sheath is applied over the yarns, and if desired the sheath is covered with other layers. Any otherwise empty spaces within the tubes and between the sheath and the tubes is filled with a water blocking material which permits the ribbons to move with respect to the enclosing tubes and which permits the tubes to move with respect to the sheath and the central member.

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