Sheet metal container making – Method – Making pull tab-gripping means
Patent
1997-11-26
1999-10-19
Coan, James F.
Sheet metal container making
Method
Making pull tab-gripping means
413 12, 220269, B21D 5144
Patent
active
059677260
ABSTRACT:
The product and method of manufacturing a tab having a rivet island window and adapted to be secured to a container end, including the steps of forming a first dimple at a first end position of the window and a second dimple at a second end position of the window, formed as depressed regions of metal residing outside the central plane of the metal. The method includes punching a first blank in the first dimple and a second blank in the second dimple, and subsequently bending the edge regions around the first and second blank to form a bend of the metal away from the central plane. The central region of the window is formed between and joining the blanks, and a rivet opening is formed, adapted to receive a rivet for staking the tab to a container end.
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Forrest Randall G.
Turner Timothy L.
Young Carlton
American National Can Company
Coan James F.
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