| 摘要 |
PROBLEM TO BE SOLVED: To provide a printing apparatus, which can appropriately adapt an apparatus composed of an impression cylinder and a form cylinder to sheets such as bills, security paper and the like, appropriately print a number or numbers on ends of the sheet, and can accommodate sheets of different sizes by exchange of a porous sheet. SOLUTION: In a printing apparatus formed by an impression cylinder 1 and a form cylinder 2 or a form belt, a porous sheet 3 having a multiplicity of suction holes 4 is detachably mounted over a peripheral surface of the impression cylinder 1, and a multiplicity of suction holes 6 are provided on the impression cylinder 1 to be opened at that peripheral surface thereof which is covered by the porous sheet 3, to communicate with the suction holes, 4 whereby a printing sheet 5 is attracted to a surface of the porous sheet 3 to permit the impression cylinder 1 to perform printing. |
