| 摘要 |
PURPOSE:To adjust a pattern interval with high accuracy, by constituting a sheet pull-back apparatus so that the first roller rotationally driven in the same direction as an impression cylinder and the second roller rotationally driven in the same direction as a plate cylinder are horizontally moved while a sheet is nipped by both rollers. CONSTITUTION:When a plate cylinder 5 is rotated to a printing interrupting position and an impression cylinder 6 is separated from the plate cylinder 5, a motor 73 is started and a screw shaft 69 is rotationally driven. Therefore, the movable frame structure 80 engaged with the screw shaft 69 through a ball screw type bearing is guided by a rail to be moved to a winding start side. When a sheet 11 is pulled back to the winding start side, the sheet 11 is nipped by the first roller rotationally driven in the same direction as the impression cylinder 6 and the second roller rotationally driven in the same direction as the plate cylinder 5 both of which are mounted to the movable frame structure 80 and pulled back by horizontally moving both rollers. Therefore, the interval between the previously printed pattern and the continuously printed pattern can be adjusted with high accuracy. |
