| 摘要 |
<p>Packaging unit, has supple walls around the reservoir which is under atmospheric pressure, and a non-return valve at the jet to prevent the entry of air. <??>The packaging unit (1) to deliver a spray of a liquid, and especially a cosmetic product e.g. a perfume or sun barrier, has a reservoir (2) containing the liquid supply under atmospheric pressure. The reservoir walls are supple, without shape memory retention. The spray jet (3) emits a liquid spray when the reservoir walls are pressed inwards. The jet has a non-return valve (14), to prevent the entry of air into the liquid reservoir after pressure has been exerted. The reservoir walls are of a thermoplastic or metal material, to give the reservoir the structure of a tube, pocket or sachet.</p> |
