| 摘要 |
<p>A dispensing closure for a vessel comprising a base member and a spout member engaged with the base member. The base member including a rupture member having a camming surface and the spout member having a cam actuator for engaging the camming surface to rupture the rupture member during twisting of the spout member in a first direction relative to the base member from a sealed position to a flow position to define a flow opening in the base member to permit fluid flow through the flow opening. The dispensing closure may include a pair of spaced rupture members and cam actuators, a cap member hingedly attached to the spout member, a tamper evidency ring or other structure and a locking mechanism configured to lock the cap member in the closed position until the cap member and spout are rotated a sufficient distance to break the tamper evidency ring.</p> |
