| 摘要 |
<p>A spray for dispensing liqs. incorporates an axially compressible bellows made of flexible impermeable material such as polypropylene reinforced with a wire spring or hoops. One end the bellows is integrated with an internal nozzle and the other is fitted over a rigid plate incorporating a non-return valve above the inlet hose from the liq. reservoir. The nozzle can be depressed, collapsing and purging the bellows, by pressure on a cap which can move coaxially over an adaptor which supports the bellows housing in the mouth of the reservoir. The internal nozzle has a radial outlet discharging into a passage leading to a lateral outlet from the cap. The appts. is free from sliding liq. seals which would otherwise require precision fitting of components and provide sources of leaks.</p> |
