To eliminate the above inconvenience in accordance with this embodiment, at an instant the paper rear end detecting sensor 12 detects the rear end of an imposed paper sheet 17, {HEAD ~ the paper discharge/transport speed} of {TAIL ~ the transport} means 6 is increased to thereby permit even a small size imposed paper sheet to be discharged steadily onto the paper discharge stand 9 
To eliminate the above inconvenience in accordance with this embodiment , at an instant the paper rear end detecting sensor 12 detects the rear end of an imposed paper sheet 17 , { HEAD ~ the paper discharge / transport speed } of { TAIL ~ the transport } means 6 is increased to thereby permit even a small size imposed paper sheet to be discharged steadily onto the paper discharge stand 9
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