Process and apparatus for the continuous production of elongate

Details Process and apparatus for the continuous production of elongate Process and apparatus for the continuous production of elongate

1978-11-20

1980-05-13

Lindsay, Jr., Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 3A, 65 13, 219123, 219426, C03B 3702

Patent

active

042026792

ABSTRACT:
An elongate light conductor of circular or other cross-section is continuously produced by depositing, in a vacuum chamber, a powdered glassy (i.e. vitreous or vitrifiable) material upon the upper end of a descending rod of like material while training a stream of doping ions upon the same end. Vitrification may be assisted by an electron beam, also trained upon the powder-receiving rod end, and/or by thermal treatment of the rod leaving the vacuum chamber. The lower end of the rod is softened in a furnace from which a vitreous strand of reduced cross-section is continuously drawn through an orifice and wound upon a mandrel.

REFERENCES:
patent: 3177057 (1965-04-01), Potter et al.
patent: 3409728 (1968-11-01), Jaques
patent: 4017288 (1977-04-01), French et al.

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