A cylinder of a rotary printing machine has a peripheral surface which is divided
into at least two segments that are situated adjacent to each other, in an axial
direction of the cylinder, by a circumferential groove. Those circumferential grooves
can be closed by the placement in the groove of a suitable inlay or insert element.
That inlay or insert element is formed of several parts, typically of two inlay
or insert parts, whose peripheral surfaces complement each other to form a continuous
cylindrical peripheral surface on the cylinder after the inlay or insert parts
have been placed in the grooves.
