| 摘要 |
<p>Bag of the type comprising a filling tube fixed in the basic structure, one of whose ends is closed by a film of flexible elastic material having a central orifice. According to the invention, the film of flexible elastic material (9) is sandwiched between two sheets (11, 12) of flexible material having respective openings (13, 14) centred on the axis of the filling orifice and having dimensions greater than those of this orifice. Application to the production of bags for powdery products. <IMAGE></p> |
