| 摘要 |
The invention concerns a plastic bag provided with a detachable closing device (1) capable of being closed tight, consisting of two sections (2), each section (2) being made up of a seat (3) provided, on one face, with a closing element (4), co-operating with that of the other section (2) and, on the opposite face, with at least a raised band (5) for fixing the seat (3) on one surface of the bag (10), by melting and pressing the fixing band (5) on said surface (10), characterised in that the fixing band (5) has a transverse cross-section the length of which increases from the free end towards the seat (3).
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