A torque limiter between a pressure roller and shaft, which is configured to allow the pressure roller to rotate in a feed-out direction of a paper-sheet P, relative to the shaft, when a torque greater than a predetermined torque T is applied to the pressure roller along a circumferential direction thereof, while interlocking the pressure roller with the shaft when the torque applied to the pressure roller along the circumferential direction thereof is less than the predetermined torque. Further, the predetermined torque is set less than frictional torque N3 directly generated between a feed roller friction part and a pressure roller friction part at a nip part N, while being set greater than both the frictional torque N1 generated between the pressure roller friction part of the pressure roller and the paper-sheet P at the nip part N and the frictional torque N4 generated between a pair of paper-sheets P at the nip part.