| 摘要 |
A safety bag (1) of flexible material such as a thin sheet of transparent plastics material, the bag having an opening (2) of dimensions appropriate for its use with an edge that is suitable for being bonded to reinforcement (3a, 3b) for facilitating the opening of a passage to the inside of the bag starting from a flattened position in which the opening is closed, said bag also including a first tubular element (4) bonded in leakproof manner to the bag in the vicinity of its opening and extending into the bag from its opening over an appropriate distance, e.g. about 15 cm. A second tubular element (5) is disposed between the facing walls of the bag (l) and of the first tubular element (4), second tubular element being also bonded in leakproof manner to the bag in the vicinity of its opening and extending to the inside of the bag over a distance greater than that of the first element.
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