The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 26, 2005
Filed:
Jun. 24, 2002
Applicant:
Shigeyoshi Ito, Otsu, JP;
Inventor:
Shigeyoshi Ito, Otsu, JP;
Assignee:
Nippon Electric Glass Co., Ltd., Shiga-Ken, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J009/26 ;
U.S. Cl.
CPC ...
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.