POST-PROCESSING DEVICE AND IMAGE FORMING SYSTEM

PROBLEM TO BE SOLVED: To lessen dimensional reduction of a completed book by minimizing the cutting splash when the ends of recording sheets of paper having undergone a saddle stitching and middle folding process are to be cut by a cutting device and to enhance the productivity of the cutting process. SOLUTION: A post-processing device FS is equipped with a transporting means 10 to transport recording sheets of paper sent from an image forming device A, a first stacking part 30 to temporarily accommodate the sent recording sheets of paper, a staple means 50 to bind the center of the accommodated bundle of recording sheets, a middle folding means 60 to fold the center of the saddle stitched bundle of recording sheets, a cutting means 100 to cut the ends or three sides of the middle-folded bundle of recording sheets, and a post- processing control means 90 to control the mentioned means, and further the arrangement includes an input means to specify and enter the cutting position of the ends or three sides and a memory means to store the input data entered from the input means, and the post-processing control means 90 controls the cutting position in accordance with the input data stored in the memory means.