Extendable exhausting assembly for the manufacture of gas discha

Details Extendable exhausting assembly for the manufacture of gas discha Extendable exhausting assembly for the manufacture of gas discha

1994-06-16

1996-03-05

Bradley, P. Austin

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

445 53, 445 73, H01J 938

Patent

active

054962013

ABSTRACT:
An apparatus and method for the manufacturing of metal salt gas discharge lamps involves a purging assembly which will allow the purging step to be conducted outside a dry box, while completely shielding the fiber material from possible exposure to the atmosphere, so as to simplify the manufacturing process and reduce operation cost. The purging assembly comprises a manifold, which is removably connected to a vacuum pump and an inert gas supply, respectively. The manifold is provided with a plurality of branch tubes connected thereto. Each of the branch tubes is adapted to be connected to a lamp envelope via a ball valve, which provides a straight passage way therethrough when opened. During the purging operations, the ball valves respectively connecting the lamp envelopes and the branch tubes are open to thereby allow moisture and other undesirable components to be purged from the lamp envelope. After the completion of the purging operation, the ball valves are closed and the manifold, with the lamp envelopes attached thereto, is disconnected from the vacuum pump and the inner gas supply and transferred into a glove box. There, the ball valves are opened and the fiber materials are allowed to enter the lamp envelopes. After the filling operation is completed, the ball valves are closed and the manifold is taken out of the glove box. Finally, the manifold is re-connected to the inert gas supply to fill the lamp envelops with inert before the lamp envelopes are sealed and severed.

REFERENCES:
patent: 3484146 (1969-12-01), Meijer et al.
patent: 3572877 (1971-03-01), Ogawa et al.
patent: 4364617 (1982-12-01), Moriwaki et al.
patent: 4993981 (1991-02-01), Ose et al.

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