| 摘要 |
In a bag adapted to contain a flowable product therein, the bag having first and second opposed closed ends, one of said ends having a self-sealing sleeve formed therein through which flowable product may be delivered into the bag, an improved self-sealing sleeve comprising a first generally tubular sleeve extending into said bag at one side of said one end, a second generally tubular sleeve located inside of and being attached to first sleeve and extending beyond the first sleeve into the bag and a third generally tubular sleeve located inside of and being attached to the second sleeve and extending beyond the second sleeve into said bag.
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