| 摘要 |
An iris mechanism for preventing unauthorized removal of containers from apparatus for dispensing containers, such as cups. The apparatus separates and releases a single container from a stack of containers. The iris mechanism defines a central opening through which a released container must pass. The size of the opening may be changed between a closed position wherein the opening is smaller than the largest diameter of a cup to be dispensed by the apparatus and an open position wherein the opening is at least as large as the largest diameter of a cup to be dispensed.
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