Glass manufacturing – Processes – With destruction or delamination of transitory attached or...
Patent
1986-05-12
1988-02-16
Lindsay, Robert L.
Glass manufacturing
Processes
With destruction or delamination of transitory attached or...
65 34, 65 36, 65 55, 65 42, 65 58, 65 45, 445 22, 445 26, C03B 3306
Patent
active
047252987
ABSTRACT:
A low pressure mercury vapor discharge lamp forms an electric discharge path by the use of a bulb placed on an end plate and the bulb is formed by a process which results in the connecting outer side surfaces of juxtaposed glass tubes through communication holes formed in the outer side surfaces respectively. The process involves placing the juxtaposed glass tubes so that their outer surfaces are opposed in a contacting state. A portion of each of the glass tubes is heated in order to form a communication hole through the utilization of a burner inserted through an open end into the interior of each of the glass tubes in order to cause fusion of that particular portion in each tube to thereby form the communication hole by wind pressure. A mass of molten glass is then forced outward at the outer peripheral edge of the communication hole whereby these outer peripheral edges of the glass tubes are mutually connected by the mass of molten glass and the open end of the tubes are then closed to form a U-shaped passage between the tubes.
REFERENCES:
patent: 2561859 (1951-07-01), Greiner
patent: 2699014 (1955-01-01), Van Steenis
patent: 4530710 (1985-07-01), Dullea et al.
patent: 4545774 (1985-10-01), Van Gils et al.
Imai Jun
Ito Hiroshi
Takeda Takao
Tanaka Norihiko
Taniguchi Yoshiteru
Lindsay Robert L.
Mitsubishi Denki & Kabushiki Kaisha
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