Apparatus for manufacturing a discharge lamp envelope having mul

Details Apparatus for manufacturing a discharge lamp envelope having mul Apparatus for manufacturing a discharge lamp envelope having mul

1984-12-06

1986-04-29

Lindsay, Robert

Glass manufacturing

Glassworking or preform by or with reheating means

Mechanical means to reshape preform

65292, 65295, C03B 2704

Patent

active

045854688

ABSTRACT:
An apparatus for manufacturing a fluorescent lamp envelope comprises means for holding the envelope, a plurality of heat sources, means for providing relative rotation between the envelope and the plurality of heat sources with the heat therefrom acting on substantially narrow axially spaced regions on the envelope, means for engaging the envelope and for forming a plurality of constricting portions at axially spaced regions on the envelope, means for moving the forming means to engage the envelope and means for applying a positive pressure within the envelope while the forming means is engaged with the envelope.

REFERENCES:
patent: 2916645 (1959-12-01), Lemmers et al.
patent: 2973447 (1961-02-01), Aicher et al.
patent: 3098945 (1963-07-01), Lemmers
patent: 3759682 (1973-09-01), Tiley
patent: 3897233 (1975-07-01), Szilagyi
patent: 3988633 (1976-10-01), Shurgan
patent: 4514206 (1985-04-01), Roselt et al.

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