| 摘要 |
A rupturable diaphragm seal is disclosed for use in dispensing closures having a closure body including a dispensing opening leading there through and having a spout rotatably mounted on the body so as to be capable of being rotated from an initial closed position in which a passage in the spout is out of alignment with the dispensing opening to an open position in which the passage of the spout is aligned with the dispensing opening. In such a closure the rupturable diaphragm is secured to the closure body so as to extend across the opening. The spout used is formed so as to overlie the diaphragm in an initial closed position of the spout and is formed so as to engage and apply pressure to the diaphragm when the spout is rotated from this initial closed position to an open position so as to rupture the diaphragm.
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