SHEET PROCESSING DEVICE, SHEET CONVEYING DEVICE, SHEET POST-PROCESSING DEVICE, SHEET PUNCHING DEVICE, AND IMAGE FORMING DEVICE

摘要

PROBLEM TO BE SOLVED: To easily control a series of processing for delivering a sheet bundle wherein a sheet remaining in a second conveying passage is superposed with a next sheet to a processing tray.

SOLUTION: The sheet is guided from a lower conveying passage 2b to a first conveying passage A at a conveying speed V1, and a speed of a sheet feeder 5 is decreased to superpose the sheet when the prescribed time passes after a fore end detected by a sensor S2 reaches a sheet feeder 6. The speed is increased in order to convey the superposed sheets at a conveying speed V2. Sheet conveyance is stopped when the prescribed time passes after a rear end of the sheet detected by the sensor S2 reaches the sheet feeder 6. The sheet feeder 6 is reversely rotated in order to retreat the sheet to the second conveying passage B, the speed is increased in order to convey the sheet at a conveying speed V3, and sheet conveyance is stopped when the time same with the conveying time of normal rotation for superposing the sheet passes. The sheet bundle superposed with the remaining sheet is delivered to the processing tray 13 at a conveying speed V4. The conveying speeds for a series of processing are same (V1=V2=V3=V4), and control is simplified.

COPYRIGHT: (C)2008,JPO&INPIT