US 5,090,931 AGranted

Method of producing a lamp having a coated layer and the lamp produced thereby

AssigneeToshiba Lighting & Technology Corporation

InventorIsao Shiraishi

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Abstract

A method of producing a lamp having a coated layer and of a type in which linear tubes in parallel are interconnected, comprises the steps of forming a connected glass tube by making an airtight connection via connecting portions between side walls of a plural number of glass tubes having openings at both ends and main portions that are linear and arranged parallel to each other; of forming a coated layer on the inner wall surface of the connected tube including the connecting portions by introducing a coated substance from opening end portions of the connected glass tube; and of forming an airtight path as a discharge path in the connected tube including the main and connecting portions by sealing the opening end portions on a side of the connecting portions of the connected tube after the formation of the coated layer.

Claims16

Dependent claims

A method of producing a lamp having a coated layer and parallel linear tubes, comprising:

a step of forming a connected glass tube having a plural number of glass element tubes and connecting portions between side walls of said plural number of glass element tubes, each of said glass element tubes having openings at first and second ends and having linear main portions arranged parallel to each other;
a step of forming a coated layer on an inner wall surface of said connected glass tube including said connecting portions by introducing a coating substance from said openings at said first end of said connected glass tube and by exhausting said coating substance from said openings at said second end;
and
a step of forming an airtight path as a discharge path in the connected glass tube including said main portions and said connecting portions by sealing said openings of said connected glass tube after the formation of said coating layer.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 07/620,405Filed 29 Nov 1990
Priority: JP 1-31025029 Nov 1989
Granted: 25 Feb 1992
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H01J 9/247
Specially adapted for gas discharge tubes or lamps: specially adapted for gas-discharge lamps
C03B 23/13
Re-forming tubes or rods: reshaping combined with uniting or heat sealing, e.g. for making vacuum bottles
C03B 23/207
Uniting glass pieces by fusing without substantial reshaping: uniting glass rods, glass tubes, or hollow glassware
C03C 17/004
For hollow ware, e.g. containers: coating the inside