| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high reliable structure of a container spout, a packaging container and an inside plug structure which can prevent a back flow of a fluid effectively and can prevent the intrusion of a foreign substance and bacteria in a container body more certainly. <P>SOLUTION: The structure of a container spout comprises an outside valve 4a to allow a flow of the fluid 1 from the inside to the outside and to control the back flow of the fluid 1 from the outside to the inside by covering the tip of a opening hole 3a elastically, a pillar shape part 5, an inside valve 6 provided on the periphery of the pillar shape part 5 to control the back flow of the fluid 1 from the outside to the inside by closing a gap with the inner wall of the opening hole 3a elastically, a coming-off preventing part 7 provided continuously to the pillar shape part 5 and a flow passage 8 allowing the fluid 1 to flow into the opening hole 3a. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
