| 摘要 |
<p>A fragrance controlled release device including a container having at least two chambers, the two chambers being symmetrical and in the shape of an hourglass, means forming a reduced and restricted channel for providing communication between the two chambers, the channel being of a diameter substantially less than the diameters of the two chambers, porous particulate carrier means in one of said chambers, said one chamber being air impermeable and the other chamber being air permeable and a fragrance contained and entrapped within the carrier means.</p> |
