| 摘要 |
<p>In a deodorizing gas filter for ostomy bags (22), consisting of a sheet (10) of deodorizing filter material, for example a porous foamed plastic with particles of active carbon, and having a central inlet opening (12), a gas-tight connecting layer (14) to the bag on one side of the filter sheet, and a gas-tight covering layer (24) on the other side of the filter sheet, the covering layer consists of elastic film material, or is provided with a layer of elastic material at least in that part covering the central opening and an immediately surrounding zone thereof.</p><p>This makes it possible to prick through the covering layer (24) and via the central opening also the bag in one with a needle, and still secure the desired passage of gas from the central opening (12) centrifugally through the fitter, since the elastic material of or on the covering layer results in the needle hole closing and remaining closed at the pressures practically occuring in ostomy bags, whereas the needle hole in the bag, having the form of one or more short tears, remains open because the bag film is of a thermoplastic inelastic material.</p><p>Possibly, the filter (28) affixed to the bag (22) may be covered with a cover (34) to prevent carbon particles possibly falling out from the filter sheet (10) from dirtying the ostomy bag, said cover being tearable on account of a weakening line (38).</p> |
