| 摘要 |
A vacuum container has a cap with a recess port on the top thereof, and an aperture on the bottom side of the recess port to receive a strut type button. The button has a retaining flange on a lower side to press the bottom wall of the cap. There are air vents around the aperture. The button further has a membrane extending outwards to cover the air vents. A vacuum cylinder can be coupled with the recess port to withdraw the air in the container to form a vacuum condition. The invention integrates the vacuuming and pressure releasing structures into one body at a smaller size, thus can be used on a small container. A plurality of smaller containers can be housed in a vacuum chest. While the vacuum chest is vacuuming, the smaller containers are also being vacuumed at the same time.
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