| 摘要 |
Sheet handling apparatus comprises an input hopper (2); one or more output hoppers (105); a transport system (15, 19, 24) for conveying sheets singly from the input hopper to the or one of the output hoppers; and a detection system (50) passed which the sheets are conveyed for detecting one or more characteristics of the sheets. A microphone (220) is arranged to respond to noise produced by a sheet as it is being bent around a roller (19) of the transport system. A control system is connected to the detection system (50) for controlling operation of the transport system. The roller (19) has a substantially constant radius so that the curvature imparted to the sheet by the roller is substantially constant along the dimension of the sheet parallel to the axis of the roller, the control system being connected to the microphone (220) to determine the stiffness of the sheet. |
