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. 02, 1979
Filed:
Jan. 30, 1978
Arthur P Zundel, Mt. Prospect, IL (US);
National Can Corporation, Chicago, IL (US);
Abstract
An easy open ecology end is disclosed herein and includes an end panel that has a removable section defined by a weakened score line. A tab is secured to the removable section and the tab and removable section are designed so that both remain captive with respect to the end panel when the weakened score line is severed. The weakened score line is produced by a unique three step process and has an area of reduced residual which is first severed when a force is applied to the tab so that the container is vented before the remainder of the residual is severed. The tab is designed to produce a localized initial pressure to initially sever the area of reduced residual and then sever the remainder of the score line.