| 摘要 |
The present invention relates to an opening device for a beverage container More specifically, the invention relates to a metal end closure having a primary opening area and at least one optional secondary vent opening which can be opened with the same pull tab The primary opening area of the metal end closure may be opened by utilizing a pull tab interconnected to a central panel, the pull tab being adapted for applying a downward force to form a first opening Subsequently, the pull tab is rotated and the tail end lifted to form a second opening in the end closure |
