| 摘要 |
<p>A code reader intended primarily for use in a stock control system for a bar selling liquid beverages, includes an optical sensor (2) mounted on an inverted channel member (1) for reading a code pattern of concentric rings printed on a bottle closure (3). The reader is positioned at the point of sale where the closure is to be removed from the bottle, this being carried out by sliding the bottle along the channel member (1) so that firstly the code pattern is scanned by the sensor (2), and then the closure is removed by means of a pivotable claw (4) at the end of the channel member (1). The claw (4) can be locked in a blocking position by a solenoid (11) to prevent closure removal until circuitry coupled to the sensor (2) indicates that the code pattern has been validly read.</p> |
