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US 6,674,231 B2Granted
Panel for color cathode ray tube with seal and surface having rough surface
AssigneeNippon Electric Glass Co., Ltd.
InventorMichiharu Eta
Life of this patent
Estimating the term…
Abstract
A panel for a color cathode ray tube includes an opening portion provided with a seal end surface to which a funnel is sealed through a frit glass. The seal end surface of the opening portion is a rough surface comprising a large number of streak-shape ridges and troughs in which minute recesses and protrusions range in a circumference direction of the seal end surface.
Claims4
A glass panel for a color cathode ray tube, comprising:
- an opening portion having a seal end surface to be sealed to a funnel through a frit glass;
- wherein the seal end surface of the opening portion is a rough surface having a plurality of streak-shape ridges and troughs along a circumference direction of the seal end surface;
- and
- wherein each of the streak-shape ridges and each of the troughs is uneven in the circumference direction that a length of each of the ridges and each of the troughs is in a range of about 0.1 mm to about 200 mm in the circumference direction of the seal end surface respectively.
1 more element
Dependencies are inferred from the claim text.