Method and apparatus for manufacturing an optical fibre...

Details Method and apparatus for manufacturing an optical fibre... Method and apparatus for manufacturing an optical fibre...

G - Physics

02

B

G02B 6/44 (2006.01)

Patent

CA 2356980

Undesired and unforeseeable shrinkage may occur in a tube of plastic material containing optical fibres following its manufacture, especially during storage when the tube is wound on a reel. As a result, there may be uncontrollable variations of the ratio between length of the tube and length of the optical fibre contained therein ("excess fibre variation"). The present invention relates to a method and equipment for limiting the excess fibre variations in a plastic tube, by stretching the tube by a predefined amount during manufacturing. The present invention also relates to a plastic tube subjected to a predefined stretching, a cable comprising such a tube and the equipment suitable for manufacturing such tube.

Un retrait indésirable et imprévisible peut se produire dans un tube en matière plastique contenant des fibres optiques, après fabrication, notamment au cours du stockage lorsque le tube est enroulé sur une bobine. Par conséquent, le rapport entre la longueur du tube et la longueur de la fibre optique qu'il contient peut varier de manière incontrôlable ("variation d'excès de fibre"). La présente invention concerne un procédé et un équipement permettant de limiter les variations d'excès de fibre dans un tube plastique, par l'allongement du tube selon une longueur prédéfinie au cours de la fabrication. La présente invention à également trait à un tube plastique soumis à un allongement prédéfini, à un câble pourvu d'un tel tube et à l'équipement approprié pour fabriquer ce tube.

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