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:
Apr. 20, 1982
Filed:
Aug. 25, 1980
Alcan Research and Development Limited, Montreal, CA;
Abstract
An aluminum sheet product is formed from an alloy containing Fe 0.6-1.0%, Si 0.5-0.9% and Cu 0.3-0.5% and includes Ti and B in conventional grain refining amount. Mn is permissible in amounts up to 0.2-0.3% but is preferably held below 0.1%. The Mg impurity content is preferably held at a very low value so as to avoid difficulties with adhesion of lacquer. The principle use of the sheet product is for the production of bottle closures and for that purpose it is preferably produced in a thickness of 0.15-0.25 mm. and in a quality having a low percentage earing and fine grain size. For this purpose the sheet is subjected to a temper cold rolling reduction of 30-60% after the last interannealing treatment. No homogenization treatment is required before hot reduction of the cast ingot and no precipitation heat-treatment is applied to the hot-rolled product before cold rolling.