| 摘要 |
A chute system having a pneumatically actuated access door where the door is journally mounted to an access port in the wall and communicates with the chute to direct objects inserted into the access port to the chute. When an operator actuates a switch, the door may be opened by a pneumatic forcer connected between the access port frame and the door so as to form a lever arm about the door journal. The pneumatic forcer is mounted to the door with a slidable journal such that the door may be opened manually. The duration of the open state of the door is determined by a timing mechanism which removes the pneumatic pressure after a time has elapsed, enabling a spring to urge the door into the closed position.
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