Method of lowering and raising a optical fiber preform in a sint

Details Method of lowering and raising a optical fiber preform in a sint Method of lowering and raising a optical fiber preform in a sint

1994-03-07

1995-06-13

Jones, W. Gary

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

With measuring, controlling, sensing, programming, timing,...

65385, 65427, 65260, 414210, C03B 37018

Patent

active

054238986

ABSTRACT:
An improvement is proposed in the apparatus and method for the preparation of a transparent silica glass preform as a precursor of optical fibers by sintering and vitrifying a porous silica glass preform in a sintering furnace as vertically suspended at the lower end of a suspender rod rotated by a carriage. Different from the conventional process in which the porous preform is lowered into the sintering furnace and the transparent preform after vitrification is pulled up out of the furnace as suspended at the lower end of the suspender rod throughout, a separate vertical driving device is provided along with a horizontal driving device for the carriage so that the effective up-and-down stroke of the carriage can be greatly reduced and the apparatus as a whole can be by far more compact contributing to the reduction of the manufacturing costs of the optical fibers of silica glass.

REFERENCES:
patent: 1213285 (1917-01-01), Slingluff
patent: 3981369 (1976-09-01), Bokenkamp
patent: 4350569 (1982-09-01), Helgeland
patent: 4738321 (1988-04-01), Olivier
patent: 4801324 (1989-01-01), Hyland
patent: 4906268 (1990-03-01), Lane
patent: 5221309 (1993-06-01), Kyoto

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