Method of fabricating a tapered torch nozzle

Details Method of fabricating a tapered torch nozzle Method of fabricating a tapered torch nozzle

1981-04-06

1983-01-11

Crane, Daniel C.

Glass manufacturing

Processes

Fusion bonding of glass to a formed part

65 56, 65108, 29157C, C03B 2313

Patent

active

043680631

ABSTRACT:
VAD torches include a plurality of coaxially aligned tubes. A typical outside diameter is about 1 inch. To fabricate smaller torch nozzles, spacers (20, 21, 22) are symmetrically placed between adjacent tubes (11, 12, 13, 14), and the entire tube assembly heated and drawn as a unit to reduce its diameter. The drawn tubes are then cut at a point along the reduced diameter region to produce a torch whose nozzle has the desired (i.e., reduced) diameter.

REFERENCES:
patent: 1906315 (1933-05-01), Davis et al.
patent: 2215019 (1940-09-01), Smith
patent: 2217194 (1940-10-01), Bryce et al.
patent: 2243184 (1941-05-01), Aronson et al.
patent: 2374269 (1945-04-01), Breadner et al.
patent: 2475431 (1949-07-01), Luertzing
patent: 2714833 (1955-08-01), Gilbert
patent: 3455667 (1969-07-01), Snitzer et al.
patent: 3966446 (1976-06-01), Miller

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