Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1986-05-15
1987-11-17
Lindsay, Robert L.
Glass manufacturing
Processes
Forming product or preform from molten glass
65 13, 65 182, 65144, C03B 37026
Patent
active
047071737
ABSTRACT:
A method of fabricating a porous glass rod having a reaction vessel including an elevational passage from an exhaust port of the vessel side and the top of the vessel over the interior and a burner mounted at the end in the vessel for forming glass fine particles, and a target elevationally movable and rotatably inserted from the passage into the vessel which has injecting to accumulate glass fine particles produced through the burner to form the porous glass rod at the lower end of the target rotated at a predetermined position in the reactor, and drawing the target in response to the growing velocity of the porous glass rod, wherein downward gas stream is produced along the outer periphery of the conduit in the vessel. The method is conducted by an apparatus for fabricating the glass rod. The method and apparatus can stabilize the fluidity in a reaction vessel to stabilize the outer diameter and the refractive index distribution of the glass rod in the longitudinal direction.
REFERENCES:
patent: 4123242 (1978-10-01), Imoto et al.
patent: 4259101 (1981-03-01), Tsukuda et al.
patent: 4435199 (1984-03-01), Potkay
Iino Akira
Kawazoe Hideyo
Orimo Katsumi
Lindsay Robert L.
The Furukawa Electric Co. Ltd.
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