Metal fusion bonding – With means to deform work – filler – or flux portion before... – Comprising means forming one-piece blank into a tubular shape
Patent
1987-07-16
1988-07-26
Combs, E. Michael
Metal fusion bonding
With means to deform work, filler, or flux portion before...
Comprising means forming one-piece blank into a tubular shape
29728, 72 52, 21912163, 228148, 350 9623, B23K 3106, B23K 2602, B23P 1904, B21D 3900
Patent
active
047594870
ABSTRACT:
An apparatus and method for continuously manufacturing optical fiber cable in which optical fiber is encased by an hermetically sealed homogeneous metal tube formed from flat metal strip. A first assembly of mating rollers having successively different shapes forms the flat metal strip into a partially formed tube having a longitudinal gap. Optical fiber is guided through the gap to lie within the partially formed tube. The tube is then closed by a second assembly of mating rollers having successively different shapes. A laser beam is used to weld the seam closed without filler metal and without heat shielding between the seam and the optical fiber. The finished tubing with optical fiber therein is sunk by being drawn through wire dies to reduce the diameter. A wheel draws the tubing through the apparatus at constant speed to effect a uniform weld line. In another embodiment, an introducer tube of smaller diameter than the hermetically sealed homogeneous metal tube extends within the metal tube to about the point of tangential approach of the metal tube to the wheel. Gas flows through the introducer tube to carry the optical fiber by viscous drag and blow the optical fiber against the outer circumference of the metal tube as the metal tube wraps around the wheel.
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Combs E. Michael
K-Tube Corporation
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