| 摘要 |
<p>A card creasing drum 2 is formed by two part drums 14, 15 slid together along the drum shaft 4 to abut together to define the base 18 and two side walls of a circumferential channel in which a resilient creasing ring 6 is housed. The side walls of the channel are recessed, dovetailed or similar, so that the creasing ring located in the channel and projecting laterally into the recess cannot be withdrawn radially from the channel. The creasing ring includes a radially projecting creasing rib and at least one lateral rib for location in a recessed side wall of the channel in the drum.</p> |
