Method for substantially continuously drying, consolidating and

Details Method for substantially continuously drying, consolidating and Method for substantially continuously drying, consolidating and

1980-07-03

1981-09-01

Fisher, Richard V.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 18, 65 32, C03B 37025, C03B 37075

Patent

active

042869781

ABSTRACT:
A substantially continuous method for drying, consolidating and drawing an optical waveguide preform is disclosed. A porous soot preform suspended from a substantially hollow longitudinal preform handle having a longitudinal aperture therein is provided. The end of the hollow preform handle is connected to a source of gaseous drying medium, and a quantity of the gaseous drying medium is flowed through the aperture in the porous soot preform and through the porous walls of the preform thereby drying the preform structure. The extending end of the porous soot preform is heated to the consolidation temperature of the materials thereof to progressively consolidate the preform from the extending end thereof. The consolidated end of the preform is further heated to the drawing temperature of the materials thereof and a filament is drawn from the extending end of the consolidated preform.

REFERENCES:
patent: 4157906 (1979-06-01), Bailey
patent: 4251251 (1981-02-01), Blankenship

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