| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a highly sealable cap by a low opening/closing torque which can be screwed with a discharging port of a container by a low closing torque, and can be unscrewed by a low opening torque at the time of use, and in addition, of which the sealability to the discharging port of the container is good, and also, which can be used even for a discharging port made of a material having a low rigidity. <P>SOLUTION: This cap 100 is screwed with the discharging port 200 made of a plastic of the container 20. An inner sealing ring 101 which closely joins the outer peripheral surface to the inner peripheral surface of the distal end part of the discharging port of the container is provided on the lower surface of a top board 110 of the cap. A contact sealing ring 102 of which the lower distal end closely joins to the upper surface of the discharging port of the container is provided in a manner to be adjacent to the upper end of the outer periphery of the inner sealing ring. Also, an outer contact ring 103 is provided with a gap to the outer periphery of the upper end of the discharging port of the container, at the upper end of the inner peripheral surface of the peripheral wall of the cap. <P>COPYRIGHT: (C)2004,JPO |
