Equipment for blanking and blanking of blanket cylinders in the printing section of sheet-fed offset printing presses

摘要

A device for impression throw-on and throw-off of a rubber cylinder 2 in the printing unit of an offset printing machine is proposed, the rubber cylinder 2 being mounted on both sides in eccentric bushes 4 and the pivoting movement of the eccentric bushes 4 leading to impression throw-on and throw-off taking place by means of a toggle mechanism formed by the tabs 13 and 14. Two double-acting working cylinders 21.B, 21.C, which are arranged in parallel, are connected at their piston rods 23.B, 23.C to a coupler 26. Coupler 26 is articulated on tab 13. Working cylinders 21.B, 21.C can be acted upon both individually and simultaneously with compressed air so that especially in the latter case a particularly rapid throw-off of the rubber cylinder 2 from the printing cylinder 3 and plate cylinder 1 is ensured. …IMAGE…