| 摘要 |
PROBLEM TO BE SOLVED: To securely improve the quality of dot by pressing a bridge roller having a fine irregularity to both a water attaching roller and an ink attaching roller so as to make contact and freely adjusting the pressing pressure. SOLUTION: A dampening water sent from a water pan 21 to a water attaching roller 24 through a water feed roller 22 and a quantity adjusting roller 23 is branched to a portion to be supplied to a plate face 11A directly and a portion to be supplied to the plate face 11A after it is sent to an ink attaching roller 31 through a bridge roller 40 having a fine irregular face. By adjusting the pressing pressure of the bride roller 40 to the ink attaching roller 31 and the water attaching roller 24, pressure traces to be formed on the outer peripheral faces of respective counter rollers can be freely adjusted and condition of water grain relating to formation of quality of dot can be finely adjusted. At a pressing pressure adjusting mechanism 41, for example, a handle 46 is rotated by hands and a heat end of a bar-like member is made to butt against an intermediate position of a link 43 so as to freely adjust the intermediate position. An air cylinder 44 always presses the link 43 to the handle 46. |
