| 摘要 |
PURPOSE:To save the resource and to attain valid picture output by discriminating a printed side of paper used again without accidental erasure of printed data, printing out the data surely again on an opposite side to the printed paper side, discriminating the printed state while the printed state of the printed paper used again is divided for each area and printing out data onto the printed side surely again in which part of the printed side only is printed. CONSTITUTION:A sensor 2 consisting of a close contact CCD sensor or the like scans a printed side of a cut paper sheet 11 extracted from a paper feed unit 1 and sensor data are fed to a black letter count section 4. When it is discriminated that printing is available based on a black letter rate, a print rate and other collation methods or the like, the data are fed to a plotter 3 and the picture data are printed on the printed side. Then the printed paper side of paper used again is discriminated without accidental erasure of printed data and picture data are surely printed again on the opposite side to the printed side, and the printed state of the printed side used again is discriminated through division of each area and the data are surely printed again on the printed paper side for only part of the printed side. |
