Apparatus for manufacturing metal tube covered optical fiber cable and method therefor
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United States of America Patent
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Jun 20, 1995
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N/A
app pub date -
Jun 16, 1993
filing date -
Dec 5, 1989
priority date (Note) -
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Abstract
An apparatus for manufacturing a metal tube covered optical fiber cable, including an assembly (2) having a plurality of roller pairs, for causing both side edges of a metal strip (1) to abut against each other to form the metal strip into a metal tube, a laser welding device (7) for radiating a laser beam to abutment portions of the metal tube to bond the abutment portions to obtain a sealed metal tube (1c), and an optical fiber guiding element (6) for guiding an optical fiber (5) in a formed metal tube (1a) comprises an extra length control system comprising a tension adjusting element (15) for the metal strip (1) arranged in the upstream of the assembly (2) and a tension adjusting element (14) for the optical fiber (5) arranged in the upstream of the optical fiber guide element (6), and a traction element (11, 13) including tension variable element (11) for the metal tube covered optical fiber cable (1d).
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