| 摘要 |
PROBLEM TO BE SOLVED: To positively supply sheets into a gap between a printing cylinder and an impression cylinder to ensure a positive printing process by forming a continuous suction zone from a sheet introduction side to a sheet delivery side. SOLUTION: An endless porous belt 4 is hooked on an impression cylinder 2 and is made narrower in width than the width of the impression cylinder 2 in the axial line direction. Further, a first suction zone 5 is formed in the sheet introduction part 9 of the endless porous belt 4 and a second suction zone 6 is formed in the sheet delivery part 10, and at the same time, a third suction zone 7 is formed in a region where the endless porous belt 4 is hooked on the impression cylinder 2. In addition, sheets 3 are conveyed while being sucked onto the surface of the endless porous belt 4 in each of the suction zones 5, 7, 6, and are pinched between the outer peripheral face part, on which the endless porous belt 4 is not hooked, of the impression cylinder 2 and a printing cylinder 1 to be printed. |
