Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1984-08-20
1985-11-12
Lindsay, Robert
Glass manufacturing
Processes
Forming product or preform from molten glass
65 312, 65 111, 65 13, 65 182, C03C 2502, C03B 3703
Patent
active
045525765
ABSTRACT:
A method of fabricating an optical glass base material by injecting and depositing fine glass particles produced by chemically reacting glass stock which comprises means for growing the fine glass particles in a depositing direction to form porous rod-shaped base material, support means for supporting the porous rod-shaped base material after growing, and heat treatment means for sintering at least the outer periphery of the rod-shaped base material in a semisintering state before supporting the rod-shaped base material by said support means to harden the same. Thus, since the rod-shaped base material is held in the stable state through the support means, the mechanical strength of the base material is strengthened strength by the semisintering hardening through the heat treating means before being supported by the support means, the base material is not deformed nor damaged in the supported state, and a large base material may be fabricated.
REFERENCES:
patent: 3177057 (1965-04-01), Potter et al.
patent: 4202679 (1980-05-01), Cocito
Hara Ryoichi
Inagaki Nobuo
Kuroha Toshiaki
Lindsay Robert
Nippon Telephone & Telegraph Public Corp.
Oujevolk George B.
The Furukawa Electric Co. Ltd.
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