| 摘要 |
PURPOSE:To improve working efficiency and labor saving by fixing a fluid pressure cylinder with a roller lifting member which pushes up a bridge roller resisting against the own weight of the member provided on the operating end of a piston rod, to a roller supporting member which supports a watering roller. CONSTITUTION:A rod 22 advances to an arrow A direction on a command from a paper feed part, and a lever 5 and a roller arm 11 connected by means of a compression coil spring 21 rock centering around a transfer roller 7, while the watering roller 15 is separated from the surface of a printing plate. Further, at the same time, a form roller 24 leaves the surface of the printing plate as shown by a chain line to push a bridge roller 28 to an air cylinder 25 side. Consequently, a piston rod 26 is pushed via a printing head 27. If a piston rod 26 is caused to retreat in this state, the bridge roller 28 shifts to a position shown by a chain line over the watering roller 15 by the own weight of said roller, and leaves the form roller 24. Then a plate cylinder 3 is rotated to insert a doctor blade 30 and allow the tip of the doctor to come into contact with the surface of the printing plate. Thus the dust is removed. |
