| 摘要 |
PROBLEM TO BE SOLVED: To suitably contain a pressurized fluid in a space between an inner bag and an outer container by interposing a stem rubber between a lower structural portion of a valve stem forming an injection valve and an upper structural portion thereof and forming an inner peripheral portion of the stem rubber so as to be caught by a portion having a narrow mouth diameter, which is formed at a lower end of the upper structural portion. SOLUTION: An outer peripheral portion of an injection valve is formed into a taper structure and is inserted into a mounting member at an opening of an inner bag. Further, a stem rubber 13 is interposed between a lower structural portion 6 of a valve stem forming the injection valve and an upper structural portion 3 thereof. A portion having a narrow mouth diameter is formed at a lower end of the upper structural portion 3, and an inner peripheral portion of the stem rubber 13 is formed so as to be caught by the narrow mouth diameter portion. An inner bag of an empty bag is housed in an outer container together with the empty bag to be clinched to the outer container together with the empty bag, and contents to be contained is injected into the inner bag through an opening of the valve stem. According to the amount of contents injected, a pneumatic pressure in the container rises, and the contents are put into a pressurized condition from an empty bag condition. A pressurized fluid is caused to flow into a space between the outer container and the inner bag so that the pressurized fluid can balance with this pressurized condition. |
