| 摘要 |
A self-standing type bag-shaped vacuum container has a self-standing container including a wall formed of a soft sheet, a pouring port, and a check valve mounted in the pouring port. The check valve is opened to allow the migration of a content of the container when subjected to a pressure in the pouring direction, but is closed when subjected to a pressure in a filling direction, so that the inside of the container is evacuated. The self-standing container can be optimized for storing beverages or the like which are negatively effected by contact with air, because the content will be oxidized with the air. The vacuum type container will not lose its self-standing property even if the content is reduced, and can stand stably by itself.
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