07614520 is referenced by 6 patents and cites 11 patents.

A tab is used to open beer/beverage can ends and food can ends. The tab has one or more arcuate strips that are provided on a surface of the tab proximate to a peripheral surface of the tab where the one or more arcuate strips have been formed further into a preselected portion of curled or hemmed portions of the tab. Tooling for the manufacture of the tab is also provided. A method for manufacturing the tab is additionally provided as well.

Title
Tab with coin precurl for improved curl formation
Application Number
11/443803
Publication Number
7614520 (B2)
Application Date
May 31, 2006
Publication Date
November 10, 2009
Inventor
Mark Richard Mitchell
Sidney
OH, US
Craig Allen McEldowney
Russia
OH, US
Agent
Grant E Coffield Esq
Eckert Seamans Cherin & Mellot
Assignee
Stolle Machinery Company
CO, US
IPC
B21D 51/44
B65D 17/34
View Original Source