Apparatus for producing optical fibers by using crucibles

Details Apparatus for producing optical fibers by using crucibles Apparatus for producing optical fibers by using crucibles

1976-07-15

1977-06-28

Lindsay, Jr., Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 11W, 65121, 65325, 65333, 425 66, C03B 3702

Patent

active

040323137

ABSTRACT:
An apparatus for producing an optical fiber has a plurality of crucibles piled-up one upon another, each of which has a spinnerette positioned at a bottom portion to permit the molten glass to outflow therethrough and an overflow passage positioned at a side wall. With the apparatus of the construction described which is being heated as a whole, an optical fiber is spun from the spinnerettes while the crucibles are charged with their respective molten glasses in predetermined time intervals in such rates that when the molten glasses in the crucibles exceeds predetermined levels, the excess portion of the molten glasses are permitted to overflow through the overflow passages to associated receptacles, thereby the levels of the molten glasses in the crucibles are maintained constant during the entire spinning operation and the bubbles formed in the molten glasses are caused to outflown with the excess portions to enable an optical fiber of improved quality to be spun.

REFERENCES:
patent: 1538229 (1925-05-01), Weaver
patent: 2493260 (1950-01-01), Paquette et al.

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