| 摘要 |
<p>A closure (10) comprising a ferrous metal easy open food can end has a retention device (40) which engages the rear portion (38) of a ring-pull tab (30). The retention device (40) has a ledge (46) on which the tab sits and a hooked nipple (48) which passes around the inside of the ring-pull. The central panel (20) of the closure is recessed, particularly under the rear portion (38) of the tab, around the retention device (40). During processing of a container to which the closure is fixed, pressure building up inside the container causes the recessed parts (24, 25, 26) to flex outwardly, thus pushing the retention device (40) into further locking engagement with the tab (30). The tab is thus prevented from lifting and/or rotating during the processing procedure. <IMAGE></p> |
