| 摘要 |
<p>An appliance for discharging gaseous, liquid or pasty product is described which comprises an inner pouch of deformable non-extensible material for holding the product, an outer enveloping element of caoutchouc-type macromolecular material about the inner pouch, a product outlet associated with the pouch, a valve device for controlling the discharge of product from the pouch through the outlet and being located intermediate the latter and the pouch, and a rigid core associated with the pouch; the cross-sectional area of said core is at least 40% larger than the cross-sectional area, taken in the same plane, of the interior of the outer enveloping element in unexpanded condition, and the maximum fillable volume available in the pouch when the latter is completely unfolded without expansion of its walls constitutes the maximum limit of expansion of the outer enveloping element, the said maximum limit being within the range of linear stretching of the caoutchouc-type macromolecular material. A process for manufacturing such appliances is also described.</p> |
