Process for consolidation of porous preform for optical fiber

Details Process for consolidation of porous preform for optical fiber Process for consolidation of porous preform for optical fiber

1994-02-16

1995-11-28

Jones, W. Gary

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

With measuring, controlling, sensing, programming, timing,...

65427, C03B 37018

Patent

active

054703697

ABSTRACT:
There is provided a process for the consolidation of a porous glass preform for an optical fiber by heating the preform under an increasing pattern of a heating temperature in a vacuum furnace comprising a muffle tube therein characterized in that the increasing pattern is divided into two steps consisting of a first step and a second step with regard to time, and the first step has a pattern in which the heating temperature is increased under a reduced pressure atmosphere and a gas comprising at least an inert gas is supplied to the vacuum furnace under the reduced pressure atmosphere and the second step has a pattern in which the heating temperature is increased under a reduced pressure atmosphere in which a gas comprising a smaller amount of an inert gas than that of the first step is supplied to the vacuum furnace or under a vacuum pressure atmosphere in which no gas is supplied to the vacuum furnace.

REFERENCES:
patent: 4961767 (1990-10-01), Schermerhorn
patent: 5022904 (1991-06-01), Ishiguro
patent: 5106401 (1992-04-01), Ishikawa
patent: 5145507 (1992-09-01), Kyoto
Patent Abstracts of Japan, vol. 9, No. 233 (C-304) 19 Sep. 1985 *abstract* & JP-A-60 090 836 (Shinetsu Chem. Ind. Co., Ltd.) May 1985, pp. 208 and 209.
Chemical Abstracts, vol. 116, No. 12, Columbus, Ohio, US; abstract No. 112029m, *abstract* & JP-A-03-247 523 (Asahi Glass Co., Ltd.) 5 Nov. 1991, p. 134.
Chemical Abstracts, vol. 110, No. 6, Columbus, Ohio, US: abstract No. 043690g, *abstract* & JP-A-63 201 025 (Sumitomo Electric Ind. Ltd.), 19 Aug. 1988, pp. 117 and 118.
Patent Abstracts of Japan, vol. 13, No. 466 (C-646) 20 Oct. 1989 *abstract* & JP-A-01 183 430 (Sumitomo Electric Ind. Ltd.) 21 Jul. 1989, p. 199.
Patent Abstract of Japan, vol. 14, No. 43 (C-681) 26 Jan. 1990 *abstract* & JP-A-01 275 441 (Sumitomo Electric Ind. Ltd.), 6 Nov. 1989, pp. 221 and 222.
Patent Abstracts of Japan, vol. 5, No. 128 (C-067) 18 Aug. 1981 & JP-A-56 063 833 (NT&T Corp.) 30 May 1981.
Database WPIL, Section Ch, Week 26, Derwent Publications Ltd., London, GB; Class L01, AN 89-190672 & JP-A-01 131 033 (Fujikura Cable Works Co., Ltd.), 23 May 1989.
Patent Abstracts of Japan, vol. 16, No. 71 (C-913) 21 Feb. 1992 & JP-A-03 265 533 (Fujikura Ltd.) 26 Nov. 1991.
Patent Abstracts of Japan, vol. 14, No. 215 (C-716) 8 May 1990 & JP-A-02 051 436 (Fujikura Ltd.) 21 Feb. 1990.

Affiliated with

Also associated with

Rating

Process for consolidation of porous preform for optical fiber does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for consolidation of porous preform for optical fiber, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for consolidation of porous preform for optical fiber will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2010337