Method of manufacturing a bulb

Details Method of manufacturing a bulb Method of manufacturing a bulb

1988-01-25

1989-09-26

Rowan, Kurt

Electric lamp or space discharge component or device manufacturi

Process

Combined, e.g., with shaping of lamp or device envelope

65108, C03B 2306, H01J 932

Patent

active

048696986

ABSTRACT:
A curved tubular bulb having an oblong cross section is manufactured by preparing a straight glass tube having open end portions, curving the straight glass tube such that its axis exist on a plane surface and corresponds to a predetermined curve, and deforming the curved glass tube such that the glass tube has an oblong cross section whose major diameter extends on the plane surface.

REFERENCES:
patent: 1301714 (1919-04-01), Kueppers
patent: 1923148 (1933-08-01), Hotchner
patent: 3155477 (1964-11-01), Swarts
patent: 3597182 (1971-08-01), Vinz
patent: 4433994 (1984-02-01), Fujimura et al.
patent: 4525192 (1985-06-01), Booms
patent: 4540373 (1985-09-01), Rothwell

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