Processing of glass tubes, manufacture of closed-loop tubular lamp and lamps therefrom

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 WENTZEL, DAVID C, ZASLAVSKY, GREGORY, LIMA, JOSEPH V
Format Patent
LanguageEnglish
French
German
Published 26.11.1997
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: EP19970107737