B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
113/69
B21D 22/20 (2006.01) B21D 22/22 (2006.01) B21D 24/00 (2006.01) B21D 24/06 (2006.01) B29C 51/08 (2006.01) B29C 51/14 (2006.01)
Patent
CA 1107151
METHOD OF MANUFACTURING FORMED ARTICLES, EQUIPMENT FOR PRACTICING SAME, AND FORMED ARTICLES MANUFACTURED BY THE METHOD ABSTRACT OF THE DISCLOSURE A third sheet having A low rigidity is drawn while being depressed over the radiused corner of a die by elastic force or hydrostatic force to obtain a formed article whose sidewall part and flange part have no wrinkles. The force is applied through an elastic rubber provided around the punch and having an outside diameter larger than the inside diameter of the die cavity, or through an annular rigid body on which elastic pressure or fluid pressure is exerted. The hardness of the rubber is preferably approximately 70 to 85 in accordance with ASTM D 2240 Durometer A. A laminate not more than about 200 µm in thickness and consisting of a thermoplastic resin film, aluminum foil and a heat- sealable resin film is drawn into a formed article or a container which is in weight and suitable for containing foods, for instance. - 1 -
306754
Hirota Kazumi
Matsuoka Kikuo
Fetherstonhaugh & Co.
Toyo Seikan Kaisha Limited
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