Title: Spray gun for manufacturing preformed optical fibre material
Application Number: 87100680 Application Date: 1987.02.12
Publication Number: 1013572 Publication Date: 1987.09.30
Approval Pub. Date: 1992.02.12 Granted Pub. Date: 1992.02.12
International Classifi-cation: C03B37/018;F23D14/00
Applicant(s) Name: Furukawa Electric Co., Ltd. Address:
Inventor(s) Name: Kunihiro Matsuhara;Masatoshi Mikami
Attorney & Agent: HUANG YIWEN
Abstract:
    A torch for fabricating an optical fiber perform which has a plurality of raw gas injection passages at the center of the torch, a plurality of small-diameter combustion supporting gas injection passages independent of each other and disposed to surround the raw gas injection passages on the outer periphery of the raw gas injection passages disposed at the center of the torch, and an annular combustible gas injection passage disposed around the small-diameter combustion supporting gas injection passages. Thus, the torch can stably manufacture porous glass preforms.
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