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:
Mar. 28, 1989
Filed:
Dec. 22, 1987
Shigeaki Yamanashi, Kawasaki, JP;
Toyo Seikan Kaisha Limited, Tokyo, JP;
Abstract
A pull-tab for an easy-to-open can container is mounted on a lid provided at an opening of a partially-open type container that contains a liquid such as a refreshing beverage. The pull-tab is fixed by a rivet at a predetermined portion of a removable portion surrounded by a score provided on the lid. A dish-like or bowl-like recessed portion is formed around the peripheral edge of a rivet insertion hole of the pull-tab. The peripheral edge of the rivet insertion hole is turned upward along the peripheral wall of the recessed portion to form a horizontally turned portion. A reinforcing edge is provided around the entire peripheral edge of the pull-tab with the exception of the distal end portion at a portion thereof at which the rivet insertion hole is provided. The length of this portion at which no reinforcing edge is provided is made smaller than the outer diameter of the recessed portion. Therefore, it is possible to efficiently prevent the pull-tab coming off the rivet when the container is opened. It is also possible to reduce the thickness of the pull-tab.