Variable size printing machines.

摘要

In a printing machine, an interchangeable printing cylinder (34) is mounted in a first part (26) of a two-part frame, and an adjacent cylinder (12) is mounted in another frame (10). The first frame part (26) is pivoted (22) to the second frame part (24) which is in turn pivoted (22) to the other frame (10). The second frame part (24) can be locked (36) relative to the frame (10) near the co-operating printing position for the cylinders (12,34), and a pneumatic cylinder (32) between the two frame parts (24,26) then biases the printing cylinder into the co-operating printing position.