DRUM FOR A CREASING DEVICE

摘要

A drum (2) for mounting the resilient creasing ring (8) of a creasing device is formed in two parts (14, 15), each having a cylindrical outer surface (12) and a bore for mounting the drum part about a shaft (4). The first and second drum parts (14, 15) are shaped such that they may abut one another to define between them the base (18) and two side walls (20, 21) of a channel (6) for receiving the resilient creasing ring (8). At least one side wall (20, 21) of the channel (6) is recessed so that a resilient creasing ring (8) located in the channel (6) and projecting laterally into the recess cannot be withdrawn radially from the channel (6). As a result, it is no longer required that the ring (8) be under tension to hold it in place so a split ring (8) can be used and replacement rings can be added to the device without removing the shaft (4) from the machine in which it is mounted.