Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1980-12-15
1982-01-26
Fisher, Richard V.
Glass manufacturing
Processes
Forming product or preform from molten glass
65 182, 65 32, 65271, 65272, 118725, 427163, 427237, C03B 37025, C03B 3707
Patent
active
043126545
ABSTRACT:
A glass optical waveguide filament preform is prepared by chemical reaction of vapor ingredients within a glass bait tube. As the reactants flow through the bait tube, a hot zone traverses the tube to cause the deposition of sooty reaction products in the region immediately downstream of the hot zone. A baffle tube extends into that end of the bait tube into which the reactants flow. The baffle tube, which traverses the bait tube along with the burner, ends just short of the hot zone so that no soot is deposited thereon. A gas flowing from the baffle tube creates a gaseous mandrel which confines the flow of reactant vapors to an annular channel adjacent the bait tube wall in the hot zone, thereby increasing deposition rate and efficiency.
REFERENCES:
patent: 3654895 (1972-04-01), Bloom et al.
patent: 3980459 (1976-09-01), Li
patent: 3982916 (1976-09-01), Miller
patent: 4090055 (1978-05-01), King
patent: 4117802 (1978-10-01), Le Sergent et al.
Gambling et al, "Optical Fibers Based on Phosphosilicate Glass"; Proceedings of the IEE; vol. 123, No. 6; Jun. 1976; pp. 570-576.
Simpkins et al, "Thermophoresis: The Mass Transfer Mechanism . . . "; J. Appl. Phys., 50 (9); Sep. 1979; pp. 5676-5681.
Walker et al, "Thermophoretic Deposition of Small Particles . . . "; Journal of Colloid and Interface Science, 69 (1); Mar. 15, 1979; pp. 138-147.
Corning Glass Works
Fisher Richard V.
Simmons, Jr. William J.
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