Glass manufacturing – Processes – With shaping of particulate material and subsequent fusing...
Patent
1980-12-19
1982-07-06
Fisher, Richard V.
Glass manufacturing
Processes
With shaping of particulate material and subsequent fusing...
65 312, 65 301, 65 32, C03B 1906, C03B 3200
Patent
active
043381111
ABSTRACT:
A process for producing a preform for glass fiber for optical transmission by heating supply gases to form fine particles that are deposited on a rotating starter member to form an aggregate of fine glass particles which are then sintered to give a transparent vitreous material, characterized by a first heating stage wherein the aggregate of fine glass particles is sintered by increasing the temperature at a constant rate in a gaseous atmosphere which contains a halogen or halide and which has dehydrating activity, followed by holding the aggregate for a given period of time at a temperature in the range that causes considerable shrinkage of the aggregate, and a second heating stage where said aggregate is heated to the vitrifying temperature.
REFERENCES:
patent: 3868170 (1975-02-01), DeLuca
patent: 3933454 (1976-01-01), DeLuca
Edahiro Takao
Kuwahara Toru
Kyoto Michihisa
Tanaka Gotaro
Fisher Richard V.
Nippon Telegraph & Telephone Public Corporation
Sumitomo Electric Industries Ltd.
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