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:
Aug. 27, 2024
Filed:
Dec. 16, 2019
Toyo Seikan Co., Ltd., Tokyo, JP;
Yousuke Ogawa, Yokohama, JP;
Kei Oohori, Yokohama, JP;
Tatsuya Osafune, Yokohama, JP;
Takanori Nakagawa, Yokohama, JP;
Kazuhiko Tsukada, Yokohama, JP;
TOYO SEIKAN CO., LTD., Tokyo, JP;
Abstract
Provided is a manufacturing method for a rectangular can according to which it is possible to bring an angle formed by a step surface of a step provided in a rectangular can body and an inner wall surface of the rectangular can body closer to 90 degrees. In a step-forming step, using a diethat is provided on an outer wall surface side of a sidewall on which the step is to be formed, a mandrelfor sandwiching the sidewall between the mandreland the dieon the bottom side relative to a portion where the step is to be formed in the inner wall surface on which the step is to be formed, and a punchfor pressing the side opposite to the bottom side relative to the portion where the step is to be formed in the inner wall surface on which the step is to be formed and compressing the sidewall between the punchand the die, the step is formed by performing multiple instances of a pressing operation performed by the punch