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. 04, 2005
Filed:
Mar. 20, 2002
Yuji Yamasaki, Fukuyama, JP;
Masayoshi Kurihara, Fukuyama, JP;
Masahisa Fujikake, Fukuyama, JP;
Yoshinori Yomura, Fukuyama, JP;
Reiko Sugihara, Fukuyama, JP;
Yutaka Mihara, Tokyo, JP;
Yuji Yamasaki, Fukuyama, JP;
Masayoshi Kurihara, Fukuyama, JP;
Masahisa Fujikake, Fukuyama, JP;
Yoshinori Yomura, Fukuyama, JP;
Reiko Sugihara, Fukuyama, JP;
Yutaka Mihara, Tokyo, JP;
NKK Corporation, Tokyo, JP;
Abstract
A method for making an easy-opening can end comprising providing an upper die and a lower die, at least one of the upper die and the lower die having a curved surface with a radius of 0.1 to 1 mm at the tip portion thereof, the other die having a flat surface at the tip portion thereof; and press-forming an end panel by using the upper die and the lower die to form a score on the upper surface or the lower surface of the end panel so that the end panel has a thickness of 0.025 to 0.08 mm at the thinnest portion thereof.