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:
Jul. 09, 2002
Filed:
Jun. 27, 2000
Masaya Kyono, Nagahama, JP;
Nippon Electric Glass Co., Ltd., Shiga, JP;
Abstract
In a glass panel for cathode ray tube of which effective screen diameter D along the diagonal axis of the glass panel is more than or equal to 500 mm, and average radius of curvature of an outer surface of a face portion is more than or equal to 10,000 mm, when a distance h along a tube axis from a contact between an effective screen end of an inner surface of the glass panel and a blend R portion to a seal edge surface is defined as a length of a skirt portion , and a glass wall thickness of the seal edge surface of the skirt portion is defined as t, ranges of h and t are specified by ratios with respect to the effective screen diameter D, and a product of h and t is also specified to satisfy a predetermined range in relation to the effective screen diameter D. In this way, deformation of the skirt portion due to inclination is suppressed, reduction in mechanical strength due to shortening of the skirt portion is compensated by the glass wall thickness of the seal edge surface, and thus weight reduction of the glass panel is accomplished while retaining the predetermined mechanical strength.