Clsed-loop tubular lamp envelope and method of manufacture

A closed-loop, tubular lamp envelope (50) and methods of manufacturing closed-loop, tubular lamp envelopes are disclosed. A dome (58) is formed at one end of a light-transmissive tube (52). A blister is molded on the dome (58), and a hole is formed in the molded blister. Next, a dome (62) is formed...

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Bibliographic Details
Main Authors GREGORY ZASLAVSKY, DAVID-C WENTZEL, JOSEPH-V LIMA
Format Patent
LanguageEnglish
Published 18.02.1998
Edition6
Subjects
BASIC ELECTRIC ELEMENTS
CHEMISTRY
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
GLASS
MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
METALLURGY
MINERAL OR SLAG WOOL
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Summary:A closed-loop, tubular lamp envelope (50) and methods of manufacturing closed-loop, tubular lamp envelopes are disclosed. A dome (58) is formed at one end of a light-transmissive tube (52). A blister is molded on the dome (58), and a hole is formed in the molded blister. Next, a dome (62) is formed at the other end of the light-transmissive tube (52). A blister is formed on the dome (62), and a second hole is formed in the molded blister. Each of the molded blisters includes a rim (56,60) which defines the respective hole. A second tube (54) is processed in the same way. The respective rims (56,70;60,66) at the ends of the first (52) and second (54) tubes are fused together to form a sealed, closed-loop lamp envelope (50). Each tube (52,54) may be bent to provide a desired shape of the lamp envelope (50). The molding of the rims (56,60,66,70) insures that the sealing surfaces match.
Bibliography:Application Number: CN19971013440