Start/stop control of conveying means

摘要: A start/stop control arrangement for material handling systems, particularly automated checkout systems in retail stores. From a beam sensing device at the delivery end of incoming conveyor is derived not only stopping response to detection arrival that product but also time automatically no such being detected by predetermined time. The may be incorporated amplifier unit which serves amplify output device. Alternatively, and as shown herein, implemented plug-in accessory module designed interposed between two cooperating modules--one them mounting above sensor amplifier--which provide first these controls only. Provisions are made double-using outgoing from stand.