| 摘要 |
<p>The sheets are a semi-rigid plastic and at least one has a part spherical depression with short upper (4) and lower channels (5) connecting it to passages (6, 7) and (9) which join just below perforation (12). The sheets are joined face to face by a suitable method such as gluing or welding, the part spherical depression containing liquid and preferably air. By cutting along the perforation the top of passage (7) is exposed and pressure exerted on the depression causes liquid to flow along the passage (6, 7) and air along the passage (9), the resulting mixing atomizing the liquid and producing a spray (16). Release of pressure allows air to flow inwards and replace the sprayed liquid.</p> |
