Sheathed optical fibres and method of installing such fibres

Details Sheathed optical fibres and method of installing such fibres Sheathed optical fibres and method of installing such fibres

1988-04-22

1992-06-16

Hartman, J. J.

Implements or apparatus for applying pushing or pulling force

Method or apparatus for placement of conductive wire

By fluid pressure differential in conduit

2541343FT, B69H 5900

Patent

active

051219018

ABSTRACT:
A sheath for optical fibres comprises a compound sheath having an inner sheath of high modulus and density, and an outer sheath layer of low density material. The outer sheath layer may be of foamed polyethylene and the inner sheath of polypropylene, both conveniently formed by extrusion. Such fibre members are installed by first installing a conduit having one or more bores and subsequently inserting the flexible, lightweight optical fibre members containing the optical fibres into the bores. The optical fibre members are propelled by employing the fluid drag of air, or another suitable gas, passed at high velocity through the bores.

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