Glass funnel for cathode-ray tube and glass bulb for...

Details Glass funnel for cathode-ray tube and glass bulb for... Glass funnel for cathode-ray tube and glass bulb for...

2006-02-28

2006-02-28

Guharay, Karabi (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Envelope

C220S00210R, C220S00210A

Reexamination Certificate

active

07005790

ABSTRACT:
A body portion of the funnel, within a range excluding corners, has a first region of predetermined dimension, the predetermined dimension being measured from the seal edge surface in a direction parallel to a tube axis, and a second region excluding the first region. The second region has a thickness relatively smaller than the thickness of the first region, so that a boundary portion between the two regions forms a stepped portion on the external surface of the body portion.

REFERENCES:
patent: 4030627 (1977-06-01), Lentz
patent: 4483452 (1984-11-01), Blanding et al.
patent: 4686415 (1987-08-01), Strauss
patent: 6680567 (2004-01-01), Sugawara et al.
patent: 2003/0025439 (2003-02-01), Fujita
patent: 49-123262 (1973-03-01), None
patent: 59-189541 (1984-10-01), None
patent: 63-102144 (1988-05-01), None
patent: 63-250046 (1988-10-01), None
patent: 3-103548 (1991-10-01), None
patent: 03-236142 (1991-10-01), None
patent: 07-320661 (1995-08-01), None

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