| 摘要 |
<p>A container closure (10) is provided with a device for dispensing a dose of aromatic material each time the container (2) is opened. The material is held in a body (30) in an enclosure (20) bounded by a diaphragm (16) mounted on the closure. The enclosure is almost sealed but it has a restricted external communication (40). When the closure is secured to the container the diaphragm is displaced to increase the enclosure volume. Aromatic material diffusing into the increased volume is released through the restricted communication when the container is opened and the diaphragm returns to its original position. By these means it is possible to compensate for loss of aroma from the container contents as a result of continual opening of the container.</p> |
