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:
Jan. 24, 1984
Filed:
Jun. 22, 1981
Applicant:
Inventors:
Satoru Endo, Mobara, JP;
Masaaki Yamauchi, Togane, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
445 49 ; 72356 ;
Abstract
An electron gun electrode of a color picture tube is manufactured by forming three spaced openings through a metal plate; squeezing the metal plate to form three inverted cup shaped cylindrical projections having the openings at their top centers; coining inner peripheries of the openings to enlarge the same and to form bevelled portions around the peripheries of the enlarged openings; and increasing inner diameters of the cylindrical projections thereby obtaining the electrode integrally formed with three adjacent cylindrical projections.