| 摘要 |
1. An aroma preserving canister for coffee or other granulated product having aroma, comprising; a hollow body of the canister and a cap sealing said body, wherein said aroma preserving canister is characterized by having an elastic disk for sealing the canister product when the canister is uncapped, said disk is placed horizontally inside said canister at about 0.5-1.5 cm under the cap, said disk having a major stationary portion and a minor movable portion, and the cap, the body of the canister or the movable portion contains means for pressing and bending said disk movable portion downwardly when the canister is capped and having optionally means for retracting said disk movable portion back to its original horizontal sealing position when the canister is uncapped. 2. A canister according to claim 1 wherein said means for pressing and bending the movable portion is a protrusion located on the internal side of the cap of the canister and directed downwardly. 3. A canister according to claim 1 wherein said means for pressing and bending the movable portion is a protrusion located on the movable portion of the disk and directed upwardly. 4. A canister according to claims 1-3 wherein the stationary portion of the disk has a spoon-like concave depression on its side facing the cap of the canister. 5. A canister according to claims 1-3 wherein said movable portion of the disk is retracted back to its original horizontal position by a spring fastened by one end to said movable portion and by another end to a specific projection from the stationary portion of the disk. 6. Elastic disk to be installed and operated in the improved canister as defined in claim 1, wherein the elastic disk is comprised of a major stationary portion and a minor movable portion having suitable dimensions fitted to the canister.
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