Method of manufacturing a tubular lamp envelope

Details Method of manufacturing a tubular lamp envelope Method of manufacturing a tubular lamp envelope

1975-04-28

1976-11-23

Kellogg, Arthur D.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65281, C03B 2308

Patent

active

039934659

ABSTRACT:
The invention relates to a method of manufacturing a tubular lamp envelope for a fluorescent lamp in which a glass tube is softened by heating, bent around abending jig by means of bending members and then cooled until the material of the tube has solidified. During the solidification the tube assumes a horizontal position and the cooperation of the bending members with the tube is interrupted.

REFERENCES:
patent: 2476658 (1949-07-01), Geiner
patent: 3215518 (1965-11-01), Reijnders

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