Funnel for color cathode ray tube

Details Funnel for color cathode ray tube Funnel for color cathode ray tube

2005-04-26

2005-04-26

Patel, Nimeshkumar D. (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Envelope

C220S00210A

Reexamination Certificate

active

06885142

ABSTRACT:
A funnel for a color cathode ray tube comprises a seal end surface to which a panel is sealed through a frit glass. An area occupying at least 50% of the seal end surface in a width direction is a rough surface. The rough surface satisfies conditions of 10≦Rz≦25 μm and 2.5<Sm/Rz≦6.0, where Rz is the ten point height of roughness profile in the width direction and Sm is the mean interval of profile peaks and profile valleys in the width direction. The rough surface comprises a plurality of dimple-like micro cavities formed by the profile peaks and the profile valleys.

REFERENCES:
patent: 6169588 (2001-01-01), Wakatsuki et al.
patent: 6674231 (2004-01-01), Eta
patent: 04048536 (1992-02-01), None
patent: 07-95431 (1995-10-01), None

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