Glass manufacturing – Processes of manufacturing fibers – filaments – or preforms – With measuring – controlling – sensing – programming – timing,...
Patent
1994-04-15
1997-11-11
Hoffmann, John
Glass manufacturing
Processes of manufacturing fibers, filaments, or preforms
With measuring, controlling, sensing, programming, timing,...
65385, 65429, 65120, C03B 37012
Patent
active
056858892
ABSTRACT:
An optical fiber glass preform is preheated so that it is uniformly preheated therethrough, then a surface of the preform is abraded by an oxyhydrogen flame to obtain a smooth optical fiber glass preform. This method is advantageous when relatively larger diameter preforms are treated in this manner because the step of uniformly preheating the preform reduces or eliminates a temperature differential therein. The temperature differential could otherwise cause the preform to crack during cooling.
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English Translation of SU 775,057 Nov. 1990.
Database WPIL, Section Ch, Week 30, Derwent Publications, Ltd., London, GB; Class L01, AN 83-720693 & JP-A-58 104 034 (Sumitomo Electric IND.KK) 21 Jun. 1983 *abstract*.
Database WPIL, Section Ch, Week 28, Derwent Publications Ltd., London, GB; Class L01, AN 81-51370D & SU-A-0775 057 (Gusev Glass Institute) Nov. 1980 *abstract*.
Database WPIL, Section Ch, Week 52, Derwent Publications Ltd., London, GB; Class L01, AN 81-96480D & SU-A-0814910 (Dyatkovo Crys. Glass) 23 Mar. 1981 *abstract*.
Danzuka Toshio
Ohga Yuichi
Hoffmann John
Sumitomo Electric Industries Ltd.
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