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:
May. 20, 2003
Filed:
Aug. 14, 2001
Satoshi Kodama, Fukuyama, JP;
Reiko Sugihara, Fukuyama, JP;
Hideki Matsuoka, Kasaoka, JP;
Yasushi Tanaka, Fukuyama, JP;
Tatsuhiko Hiratani, Fukuyama, JP;
Kenji Tahara, Fukuyama, JP;
Kenichi Mitsuzuka, Fukuyama, JP;
Kenichiro Takayanagi, Zama, JP;
Masamichi Okada, Atsugi, JP;
Hiroaki Kato, Chigasaki, JP;
Chohachi Sato, Isehara, JP;
Other;
Abstract
A method of making a steel sheet for a tension mask, including the steps of: hot rolling a steel consisting essentially of, by weight %, C: less than 0.1%, Si: 0.05% or less, Mn: 0.4 to 2%, P: 0.03% or less, S: 0.03% or less, sol.Al: 0.01% or less, N: 0.010% or more, and the balance of Fe; and annealing the cold rolled steel sheet, followed by a secondary cold rolling at a reduction rate of 35% or higher. The steel sheet produced by this method shows excellent creep resistance during blackening treatment and excellent magnetic shielding property with an anhysteretic permeability of 3400 or more at a DC bias magnetic field of 0.35 Oe, and therefore causes no color-deviation when applied to the tension mask.