To enable the selection of the diameter of impression cylinders irrespective of an interval between the impression cylinders and corresponding drive gears by providing individually independent common controllable drive mechanisms with the impression cylinders and positioning a coupling of parallelogram between the toothed drive wheel for each of the impression cylinders and a shaft extension part.

A shaft 18 is connected to a shaft extension part 20, extending beyond a lateral part 1, of each of the impression cylinders 6 suspended by the lateral part through a coupling 16 of parallelogram. In addition, the shaft 18 is housed in a support or a partition wall 17, and is further, equipped with a drive gear 19 on the end part projecting through the partition 17. The coupling 16 of parallelogram cancels an axial line offset between the shaft 18 supporting the drive wheel 19 and the shaft extension part 20, i.e., the impression cylinder 6 activated by the shaft extension part 20.