| 摘要 |
<p>A 'button cell' battery-type volatile substance delivery device includes a thin-walled metallic canister (11) with apertures (14) at the closed end thereof which allows volatile fluid to escape therefrom as a vapor. A permeable membrane (13) such as a microporous membrane is positioned in one end of the canister and is sealed with a cap (16) and grommet (12) assembly. Volatile fluid is placed in the cap and grommet assembly prior to placement of the canister for crimping of the device to form a hermetic seal between the canister and the cap as well as a hermetic seal between the canister and permeable membrane along the perimeter of the closed end of the canister. These two seals allow volatile fluid contained in the cell to diffuse only through the permeable membrane at a controlled rate. The rate of evaporation of the fluid depends on the characteristics of the membrane and the number of apertures. Tape (15) may be placed over the apertures to prevent volatilization of fluid until it is ready to be used. The volatile substance delivery devices are rugged and may be mass-manufactured at low cost. Volatile substances which can be dispensed include fragrances, personal perfumes, volatile insecticides, pest repellent fluids, and volatile medicament fluid compounds.</p> |
