| 摘要 |
A membrane lid having a recessed ring pull tab. The membrane lids comprises a permanently deformable layer (e.g., metal foil or thin sheet metal) having a disk portion and a tab projecting from the outer periphery of the disk portion. The tab is folded back onto the upper surface of the disk portion. A region of the disk portion underlying the folded-back tab defines a depression and the tab is folded back such that it is recessed within the depression. A sealing material is provided on the lower surface of the membrane lid for sealing the lid to a metal ring of a container.
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