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:
Sep. 13, 1983
Filed:
Nov. 30, 1981
Michael L Atkinson, Arvada, CO (US);
Ball Corporation, Muncie, IN (US);
Abstract
The present invention relates to methods for reducing the open end of drawn and ironed containers such as beverage cans (20). It is desirable to provide a maximum reduction in diameter of the open end (36) in order to reduce the quantity of material in the lid (24); but previous forming methods have resulted in localized buckling in the reduced diameter portion (58) and/or crumpling of the transition portion (60). The present invention has solved the localized buckling and crumpling problems by a step wherein both the reduced diameter portion (58) and the transition portion (60) are reformed within controlled limits to provide a new reduced diameter portion (82) and a new curvilinear transition portion (84). Principal uses include the manufacture of beverage cans.