Method of and apparatus for producing a glass fibre bundle for use in optical communications systems
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United States of America Patent
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May 27, 1980
Grant Date -
N/A
app pub date -
Jul 12, 1978
filing date -
Jul 13, 1977
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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.
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