| 摘要 |
<p>A dispenser (10) for flowable, viscous material (52) is provided which includes a housing (12) and a reservoir (50) for the material (52) with an elongated, synthetic resin deformable outlet tube (80). A flow-controlling assembly (16) includes a tube-engaging element (84) and an actuator linkage assembly (86). In the flow-permitting position, the element (84) is adjacent the tube (80). When it is desired to terminate material flow, the actuator linkage assembly (86) is operated to cause the element (84) to move into deforming engagement with the tube (80) against a backing surface (41); continued movement of the element (84) along the length of the tube (80) in a direction away from outlet end (82) generates a suction force causing material (52) adjacent the end (82) to be drawn into the confines of the tube (80). The housing (12) includes a bypass valve that disables dispensing whenever the door (20) of the housing (12) is opened.</p> |
