| 摘要 |
The membrane ( 1 ) for closing containers in general comprise a body ( 2 ) of elastic material defining a portion ( 3 ) for its retention on said container ( 4 ) and a portion ( 5 ) for closing this latter. The membrane comprises an unidirectional valve ( 6 ) co-moulded with the body ( 2 ) for discharging the air contained in the container ( 4 ) to the outside. The food product preservation device comprises a container ( 4 ) to receive the food products ( 26 ) and a lid ( 27 ) for their protection. The device also comprises the membrane ( 1 ) interposable between the container ( 4 ) and the lid ( 27 ).
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