Glass manufacturing – Processes of manufacturing fibers – filaments – or preforms – With measuring – controlling – sensing – programming – timing,...
Patent
1997-11-25
1999-09-28
Hoffmann, John
Glass manufacturing
Processes of manufacturing fibers, filaments, or preforms
With measuring, controlling, sensing, programming, timing,...
65421, 65422, 65491, 65531, C03B 3707
Patent
active
059581026
ABSTRACT:
A method for making an optical fiber preform comprises depositing fine particles of glass serving as a dad on the surfaces of a rod-shaped core over a given length of the rod-shaped core by use of a plurality of oxyhydrogen flame burner units, detecting an amount of the resultant deposit to check uniformity in the amount of the deposit along the lengthwise direction of the rod-shaped core during the course of the deposition, and further depositing fine particles of glass on any surface portion of the rod-shaped core within the given length from at least one burner unit other than the plurality of burner units to correct the amount of the deposit over the given length based on the results of the detection. The resultant deposit is dehydrated and fired by a usual manner to obtain a preform. An apparatus for carrying out the method is also described.
REFERENCES:
patent: 4294601 (1981-10-01), Dabby
patent: 5192350 (1993-03-01), Le Sergent
patent: 5211732 (1993-05-01), Abbott
patent: 5558692 (1996-09-01), Chervenak
patent: 5676724 (1997-10-01), Barre
English Abstracts of Japanese Patents 03279234, 06072735, 0416008 and 01018929, 1994.
Hirasawa Hideo
Shimada Tadakatsu
Hoffmann John
Shin-Etsu Chemical Co. , Ltd.
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