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:
Mar. 07, 1995
Filed:
Apr. 27, 1993
Applicant:
Inventors:
Assignee:
Hitachi Metals, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
313402 ;
Abstract
The shadow mask sheet having excellent etchability and made of an Fe-Ni invar alloy consisting essentially of 30-40 weight % of Ni, the balance being substantially Fe and inevitable impurities, having a percentage of {100} texture of 85% or more in a rolled surface and a fibrous microstructure in a transverse cross section can be produced by hot-rolling the Fe-Ni invar alloy; conducting cold rolling at a rolling reduction ratio of 85% or more and annealing at 700.degree. C. or higher in this order at least once; and then conducting cold rolling at a rolling reduction ratio not exceeding that in the previous cold rolling step and annealing at a temperature of 850.degree. C. or lower in this order.