| 摘要 |
1. Apparatus for moving an impression cylinder (10) to printing and non-printing positions relative to a printing cylinder of a rotogravure machine and for actuating said impression cylinder for a wide stroke movement required for an exchange of cylinders, wherein the two pin bearings of the impression cylinder are connected to respective piston rods (6) of fluid-operable double-acting piston-cylinder units (3), which serve to raise and lower the impression cylinder (10), characterized in that the piston rods (6) extending out of the cylinders (12) are rotatably and axially undisplaceably mounted in the pin bearings (7), screws (23) are screwed into the screw-threaded (21) pistons (19) on the side which is opposite to the piston rod (6), said screws (23) have non-threaded portions, and worm wheels (36), which are mounted in fixed positions in the housing and mesh with drivable worms (4) are non-rotatably mounted on said non-threaded portions and are axially displaceable thereon for a limited distance, which corresponds to the stroke between the printing and non-printing positions. |
