| 摘要 |
The present invention relates to a screw cap (1) having a disk-shaped top part and having a flange edge an internal thread, which adjoins the outer circumference and extending perpendicular to the top part, wherein a bung opening with a bung plug (3) with an automatic venting device is arranged in midsection of the top part of the screw cap (1), as a result of which air can flow into the inner plastic container (11) of a pallet container (10), to prevent the collapse of the thin-walled inner plastic container (11) when liquid content is withdrawn from the inner container (11) while the discharge fitting (14) is open. A core element of the venting device is a disk-shaped valve disk (5) which is made of plastic and provided as a sealing element with a resilient element (6) that is also made of plastic, wherein the resilient element (6) is located below the valve disk (5) and has at least three elastic spring legs (20) which are shaped as ribs and arranged on its outer edge of the resilient element forming segments of a circle.
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