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:
Sep. 13, 1988
Filed:
Oct. 27, 1986
Applicant:
Inventors:
Emiko Higashinakagawa, Kawasaki, JP;
Michihiko Inaba, Yokohama, JP;
Yasuhisa Ohtake, Fukaya, JP;
Masaharu Kanto, Hyogo, JP;
Shinzo Sugai, Chigasaki, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; C21D / ;
U.S. Cl.
CPC ...
313402 ; 313364 ; 148D / ; 445 47 ; 156644 ; 156647 ; 156664 ;
Abstract
A cast ingot of an invar alloy is forged, hot-and cold-rolled, annealed and subjected to a controlled rolling to provide a shadow mask plate. An X-ray diffraction pattern is formed in an electron-beam hole-formation surface of the shadow mask plate, and a draft in a controlled rolling step is so controlled that the 'g' value is 2 or more. The 'g' value is given as