| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheet feeder to minutely and precisely detect residual quantity in simple constitution. SOLUTION: This sheet feeder is furnished with a sheet placing plate 1 to place a sheet on it and free to revolve in the vertical direction, a delivery roller 3 to deliver the sheet by making contact with the top part of the sheet on the sheet placing plate 1, a revolving lifter 5 to revolve the sheet placing plate 1 upward to the optimum position, a detection means 7 to detect sheet residual quantity in accordance with working time of the revolving lifter 5 and a transmission means 9 to transmit sheet residual quantity information detected by the detection means 7 to an inside or outside display means. The detection means 7 detects the sheet residual quantity from the working time as it means the sheet residual quantity placed on the sheet placing plate 1 is small and inclination of the sheet placing plate 1 is large that the working time is long and it means the sheet residual quantity placed on the sheet placing plate 1 is large and inclination of the sheet placing plate 1 is small that the working time is conversely short.
|
