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:
Jan. 10, 1989
Filed:
Apr. 14, 1988
Tuan A Nguyen, Thornton, CO (US);
Ball Corporation, Muncie, IN (US);
Abstract
A metal closure for beverage containers of the type having a center panel, a center-panel ring, an inner leg, and a pull-tab opener, includes circumferential variegations for increasing the buckling pressure of the container. The circumferential variegations are cold-worked or coined into the center-panel ring and/or into portions of the closure that are adjacent to the center-panel ring. The circumferential variegations include coined surfaces with variegated lengths, variegated coin angles, variegated coin residuals, variegated spaces between coined surfaces, or variegated widths of the center panel. The circumferential variegations achieve non-axisymmetric doming of the metal closure and increase the buckling pressure of the closure by obviating excess metal in the center panel that typically results from scorning the center panel for the easy open end.