Method of joining a tube to a rod having an annular rib, so as t

Details Method of joining a tube to a rod having an annular rib, so as t Method of joining a tube to a rod having an annular rib, so as t

1995-07-10

1997-08-19

Hoffman, John

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

Process of manufacturing optical fibers, waveguides, or...

65428, 65 55, C03B 37012

Patent

active

056583630

ABSTRACT:
A method of manufacturing a preform for drawing into an optical fibre comprises positioning a rod within a sleeving tube therefor to form an assembly in which there is an annular space between the rod and tube, and collapsing the tube onto the rod to form a solid cross-section preform. The collapsing step comprises sealingly closing the annular space at one end of the assembly and applying suction to the annular space from the other end of the assembly. The annular space at the one end is sealingly closed by locating the end of the tube at the one end on an annular rib of the rod and fusing the tube end to the rib.

REFERENCES:
patent: 2475431 (1949-07-01), Luertzing
patent: 4793842 (1988-12-01), Yokota
patent: 4812154 (1989-03-01), Yoshida
patent: 4820322 (1989-04-01), Baumgart
Patent Abstracts of Japan vol. 5, No. 28 (C-44) (700) Feb. 20, 1981.

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