Rotary web printing machine, particularly for printing on thick or

Abstract

To permit ready exchange of the length of printed subject matter to be reproduced, particularly to make packaging cartons, the cut-off size of printing cylinders, as well as blanket cylinders of an offset machine is constructed, can be changed in this manner: The respective cylinders include a cylinder shaft (44, 45) on which a lightweight cylinder sleeve (3, 3a, 4, 4a) of different circumferential size can be placed. The shafts, which can be of steel, are retained on movable support arms to swing about drive gears (23, 28) fixed in the machine, the support arms on one side wall (1) of the machine being axially movable out of the way through a window (51) formed in one side wall (1) to permit replacing the sleeves (3, 3a, 4, 4a) and, upon re-seating and re-positioning by pneumatically loaded spindles, maintaining engagement with the fixed drive gears (23, 28), as well as with inker and/or damper application rollers (8, 9, 10), some of which can be movable and some of which are fixed in the frame of the machine, also preferably pneumatically loaded. An impression cylinder (5), pneumatically and mechanically supported, is movable against the blanket cylinder sleeve (4, 4a), and positioned in the machine in accordance with the respective size of the sleeves (3, 3a, 4, 4a) on the printing cylinder shaft (44) and the blanket cylinder shaft (45), respectively. The sleeves are seated on the shafts by a conical end seat, from which they can be pushed out by hydraulic pressure.