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. 04, 2008
Filed:
Dec. 06, 2004
Mitsuhiko Aoyagi, Yokohama, JP;
Norihito Saiki, Yokohama, JP;
Hidekazu Tomaru, Yokohama, JP;
Toyo Seikan Kaisha, Ltd., Tokyo, JP;
Abstract
A method and a device for manufacturing a synthetic resin coated metal can body capable of drawing and ironing the synthetic resin coated metal can body with a large processing quantity without causing can body breakage. First and second ironings are conducted to the side wall of a redrawn can () formed by drawing a thermoplastic resin-coated aluminum sheet () on both surfaces by a first ironing die () and a second ironing die () in that order according to the pressing-in of a punch () with such processing quantities that sheet thickness reduction ratios from an original sheet thickness come within the rages of 35 to 55% and 60 to 75% respectively for manufacturing a metal can body. Since the coated layer of a thermoplastic resin acts on a metal body in a direction for preventing the metal body from being broken (ruptured), processing conditions for ironing are relieved, and even if an ironing with a high sheet thickness reduction ratio is performed, an ironing capable of maintaining quality is allowed without causing the can body breakage in a first step can () and a second step can ().