Optical fiber production method and production apparatus thereof

Details Optical fiber production method and production apparatus thereof Optical fiber production method and production apparatus thereof

1993-06-16

1995-01-24

Lindsay, Robert L.

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

With coating

65475, C03B 37023

Patent

active

053839463

ABSTRACT:
In a heating furnace an optical fiber preform is heated and the optical fiber is drawn. The obtained optical fiber is cooled by a cooling gas in a cooling apparatus provided beneath the heating furnace, then a resin is coated on the outer circumference of this optical fiber by a resin coater. At this time, the blowing direction of the cooling gas blown out from the optical fiber inlet of the cooling apparatus is inclined exactly by a predetermined angle (.theta.) with respect to the axial line of the running optical fiber. As a result, even if no rise suppression gas is used, it is possible to prevent the cooling gas blown upward from the cooling apparatus from entering into the heating furnace and thereby to prevent the lowering of the quality of the optical fiber due to the adhesion of dust. Also, a cooling apparatus container enclosing the cooling apparatus is provided.

REFERENCES:
patent: 5152817 (1992-10-01), Bennett et al.
patent: 5160359 (1992-11-01), Strackenbrock et al.
patent: 5256177 (1993-10-01), Bennett et al.
PCT International Publication No. WO89/02420, International Publication Date Mar. 23, 1989.
Patent Abstract of Japan-JP2188451, published Oct. 4, 1990.
Patent Abstract of Japan-JP60065747, published Aug. 13, 1985.
Patent Abstract of Japan-JP2153848, published Apr. 4, 1990.

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