Method of and apparatus for producing a glass fibre bundle for use in optical communications systems

To reduce breakage of fibres in optical glass fibre bundles during manufacture caused by formation of loops in the fibre during sheathing, a twist is imparted to the fibre bundle during its formation. The apparatus of the invention includes a furnace, a retaining member for holding clad glass rods i...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	WATTS, JULIAN K, YARKER, COLIN A
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES METALLURGY MINERAL OR SLAG WOOL OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS
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Beschreibung
Zusammenfassung:	To reduce breakage of fibres in optical glass fibre bundles during manufacture caused by formation of loops in the fibre during sheathing, a twist is imparted to the fibre bundle during its formation. The apparatus of the invention includes a furnace, a retaining member for holding clad glass rods in a predetermined spaced relationship one to the other, a guide member adjacent the furnace for maintaining the rods in said spaced relationship, said retaining member being movable with respect to said guide member and connected to a drive means for passing the rods into the furnace, means for drawing the rods into fibres and forming the drawn fibres into a fibre bundle and means for causing relative rotation of the said retaining member and said guide member with respect to said means for drawing the rods into fibres, so as to impart a twist to the fibre bundle as the fibres are drawn from the rods and formed into the bundle.