Color cathode ray tube panel having seal edge corner with a...

Details Color cathode ray tube panel having seal edge corner with a... Color cathode ray tube panel having seal edge corner with a...

2005-07-05

2005-07-05

Guharay, Karabi (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Envelope

C220S00210A

Reexamination Certificate

active

06914378

ABSTRACT:
A color cathode ray tube is capable of reducing a rate of cracks in a furnace and improving the productivity of the CRT by improving a structure of a seal edge of a skirt of a panel. A color cathode ray tube according to the present invention includes a rectangular panel having a substantially vertically extending skirt on inner and outer surfaces of the panel and a funnel coupled to a seal edge of the skirt of the panel. The seal edge of the skirt of the panel has a corner having a specific curvature between a seal surface and a side of the skirt, and the following relationship is satisfied: 0.6 mm<W<1.0 mm, where W is the shortest distance from a starting point on the seal surface of the corner to an extension plane of the side of the skirt.

REFERENCES:
patent: 2837235 (1958-06-01), Vincent
patent: 3002645 (1961-10-01), Kegg
patent: 6011350 (2000-01-01), Opresko et al.
patent: 6555951 (2003-04-01), Jeoung
patent: 9-171784 (1997-06-01), None
patent: 11-086753 (1999-03-01), None
patent: 2001-325899 (2001-11-01), None

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