| 摘要 |
<p>PURPOSE:To correctly grasp the number of sheets remaining in a paper feed cassette by setting the number of sheets in the paper feed cassette and storing same, and digitally subtracting the number of fed-out sheets from the stored number of sheets. CONSTITUTION:In case of feeding a sheet, first, sheets 2 are stored in a paper feed cassette 1, the number of stored sheets 2 is input to an input portion 12, and the storage on the number of stored sheets is displayed on a residual quantity display portion 15A of a display device 15. Subsequently, the number of sheets used which is obtained by detecting a sheet by a detector 7 every time a sheet is fed out is subtracted from the number of stored sheets 2. When the residual number is larger than a specified number, sheets 2 are taken out from the paper feed cassette 1 and fed to a copying machine or the like through separation rollers 5, 6. According to a detection signal of the detector 7, the number of fed-out sheets is counted, the count number is subtracted from the above number of stored sheets, and the residual number of sheets is displayed on a residual quantity display portion 15A. Thus, the residual number of sheets 2 can be detected reliably.</p> |
