Method and apparatus for tipping off refractory metal tubulation

Details Method and apparatus for tipping off refractory metal tubulation Method and apparatus for tipping off refractory metal tubulation

1979-04-30

1981-03-10

Larson, Lowell A.

Electric heating

Metal heating

Cutting or disintegrating

72 76, 72402, B23P 100

Patent

active

042556422

ABSTRACT:
A method and apparatus for tipping off the refractory metal tubulation of a high pressure sodium discharge lamp arc tube including a machine which repetitively squeezes the tubulation through two pairs of sequentially reciprocating jaws to mechanically swage the tubulation to a reduced diameter prior to electrical flashing to cause separation and sealing off of the tubulation.

REFERENCES:
patent: 936166 (1909-10-01), Riehl
patent: 2514507 (1950-07-01), Mueller
patent: 3149509 (1964-09-01), Oquist et al.
patent: 3183704 (1965-05-01), Smith
patent: 3938364 (1976-02-01), Ragard et al.

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