Method of forming a shaped fluorescent light bulb envelope

Details Method of forming a shaped fluorescent light bulb envelope Method of forming a shaped fluorescent light bulb envelope

1979-08-31

1981-08-11

Lindsay, Jr., Robert L.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65110, 65277, 65281, 313182, 316 30, C03B 2900

Patent

active

042832179

ABSTRACT:
An elongated envelope for a fluorescent light bulb is held at each of its ends, and heated to a degree by which it is bendable. The ends are then moved relatively to each other in a path by which they are turned inwardly in opposition to each other and toward the center portion of the envelope while being directed out of the plane of the center portion to in part overly the center portion.

REFERENCES:
patent: 1534685 (1925-04-01), Claude et al.
patent: 2177743 (1939-10-01), Pfaff
patent: 3309187 (1967-03-01), Drangeid

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