| 摘要 |
<p>The product and method of manufacturing a tab (10) having a rivet island window (22) and adapted to be secured to a container end, including the steps of forming a first dimple (52) at a first end position (24a) of the window (22) and a second dimple (54) at a second end position (24b) of the window (22), formed as depressed regions of metal residing outside the central plane of the metal. The method includes punching a first blank (56) in the first dimple (52) and a second blank (58) in the second dimple (54), and subsequently bending the edge regions (56a, 56b) around the first (56) and second blank (58) to form a bend of the metal away from the central plane. The central region of the window (22) is formed between and joining the blanks, and a rivet opening (20) is formed, adapted to receive a rivet for staking the tab (10) to a container end.</p> |
