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:
Aug. 22, 2006
Filed:
Jun. 02, 2000
Hajime Makio, Hikone, JP;
Masaya Kyono, Nagahama, JP;
Shigeyoshi Ito, Nagahama, JP;
Nippon Electric Glass Co., Ltd., Otsu, JP;
Abstract
Upper end edges () of positioning reference portions () to be formed on outer walls of a funnel () for cathode ray tube are formed at distances (downwardly) toward a narrow open end () of the funnel from a maximum profile line () formed in the vicinity of a wide open end () by mold matching of forming mold at the time of press molding, thereby suppressing molding defects such as deficiency and wrinkle resulting from that glass is not completely filled, which are likely to occur in reference surfaces () of the positioning reference portions, and eliminating occurrences of small cracks caused by concentration of heat stress, which are likely to occur in the upper end edges () of the reference portions, to improve the productivity of the funnel.