| 摘要 |
PROBLEM TO BE SOLVED: To prevent a content in the main body from leaking, and the outside air from entering at the time of sucking up by a method wherein on the lower surface of a flange, a sealing member is formed, and a gap between the flange and the upper end of a mouth cylindrical part is sealed. SOLUTION: A pump device C is formed of a cylinder member C1, a piston member C2, and a nozzle head C3 which press-operates the piston member C2. In this case, the cylinder member C1. is constituted of a cylinder 30 and a suction valve which is arranged on the bottom wall of the cylinder 30. A flange 33 is formed on the upper end of the cylinder 30, and on the lower surface of the flange 33, a sealing ring 34 which is engaged with the inner periphery of a mouth cylindrical part 1, is vertically hung. An attaching member B on which the pump device C is loaded, is screwed on the mouth cylindrical part 1, and thus, the sealing ring 34 is clamped on the inner periphery of the mouth cylindrical part 1, and the airtightness is kept. |
