Glass manufacturing – Processes of manufacturing fibers – filaments – or preforms – With measuring – controlling – sensing – programming – timing,...
Patent
1996-11-26
1998-05-26
Hoffmann, John
Glass manufacturing
Processes of manufacturing fibers, filaments, or preforms
With measuring, controlling, sensing, programming, timing,...
65382, 65435, C03B 3707
Patent
active
057558493
ABSTRACT:
The present invention relates to a method for precisely elongating a glass preform of an optical fiber body having a desired outer diameter. In this method, a predetermined part of the glass preform is elongated as tensile stress is applied to one end of the glass preform while a predetermined part of the glass preform is heated and softened successively from one end toward the other end of the glass preform. In this elongating operation, while the outer diameter of the softening portion of the glass preform is measured, the tensile stress is adjusted such that the outer diameter of the softening portion coincides with a preset value of the control outer diameter. In particular, this method is characterized in that the preset value of the control outer diameter is changed at least during a predetermined period until termination of elongation or during a predetermined period from the start of elongation.
REFERENCES:
patent: 3166395 (1965-01-01), Hicks
patent: 3932162 (1976-01-01), Blankenship
patent: 4046536 (1977-09-01), Smithgall
patent: 4163370 (1979-08-01), Kurth
patent: 4317666 (1982-03-01), Faure
patent: 4631079 (1986-12-01), Clark
patent: 4704151 (1987-11-01), Keck
patent: 4793840 (1988-12-01), Harding
patent: 4810276 (1989-03-01), Gilliland
patent: 4875916 (1989-10-01), Baltzer
patent: 5211732 (1993-05-01), Abbott
patent: 5320660 (1994-06-01), Breuls
patent: 5551967 (1996-09-01), Urruti
English Abstract of 4-083726, Japan, Mar. 1992.
Danzuka Toshio
Hoshino Sumio
Ito Masumi
Ohga Yuichi
Saito Tatsuhiko
Hoffmann John
Sumitomo Electric Industries Ltd.
LandOfFree
Method for elongating glass preform does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for elongating glass preform, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for elongating glass preform will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1955703