CLOSED-LOOP TUBULAR LAMP ENVELOPE AND METHOD OF MANUFACTURE

A closed-loop tubular lamp envelope and methods of manufacturing closed-loop, tubular lamp envelopes are disclosed. A dome is formed at one end of a light-transmissive tube. A blister is molded on the dome, and a hole isformed in the molded blister. Next, a dome is formed at the other end of the lig...

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Bibliographic Details
Main Authors WENTZEL, DAVID C, ZASLAVSKY, GREGORY, LIMA, JOSEPH V
Format Patent
LanguageEnglish
French
Published 22.11.1997
Edition7
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 and methods of manufacturing closed-loop, tubular lamp envelopes are disclosed. A dome is formed at one end of a light-transmissive tube. A blister is molded on the dome, and a hole isformed in the molded blister. Next, a dome is formed at the other end of the light-transmissive tube. A blister is formed on the dome, and a second hole is formed in the molded blister. Each of the molded blisters includes a rim which defines the respective hole. A second tube is processed in the same way. The respective rims at the ends of the first and second tubes are fused together to form a sealed, closed-loop lamp envelope. Each tube may be bent to provide a desired shape of the lamp envelope. The molding of the rims insures that the sealing surfaces match.
Bibliography:Application Number: CA19972205707