| 摘要 |
PROBLEM TO BE SOLVED: To provide a cap device for a container which can surely prevent pseudo-adhesion in a valve body slit. SOLUTION: A cap device is made of a flexible resin wall such as a silicone resin wherein a slit 4 is formed in the recessed part on the inside of the top part 5a and has a valve body 5 whose slit 4 is opened and closed in accordance with the pressure in a container, a cap main body 7 which holds the top part 5a of the valve body 5 in a state where the part 5a is exposed outside from the opening part 6 and is fixed at the mouth part 2 of the container and an overcap 8 covering freely removably the opening part 6. A projected part 9 is erected independently or continuously on the side covering the cap main body 7 of the overcap 8 so as to press only the slit 4 approximately at a position of the planar shape of the slit 4 of the valve body 5 and the projected part 9 is formed in such a way that when the opening part 6 is covered by the overcap 8, the projected part 9 is inserted into the slit 4 to open the slit 4. |
