mandrel and one or more cylinder sleeves not shown in detail in fig1 in order to be able to change the cylinder sleeves the bearings that support the ends of the mandrels can be removed from the same the bearing blocks 5 and 6 can then be moved aside the cylinder mandrels are now held only by the rear bearing blocks this unilateral bearing is also referred to as u201c cantilever support u201d the sleeves can now be removed from the mandrels and replaced with new ones fig2 shows a view taken along line ii ii marked in fig1 the construction of the print roller 2 comprising a cylinder mandrel 9 and a cylinder sleeve 10 is evident from this figure this figure shows the print roller 2 while the cylinder sleeve 10 is being slid onto the same the cylinder sleeve 10 usually has an inside diameter that is slightly smaller than the outside diameter of the cylinder mandrel 9 the inner surface of the cylinder sleeve however is made of a compressible material so that compressed air flowing from small openings of the cylinder mandrel 9 expands the inside diameter of the cylinder sleeve 10 to such an extent that it is possible to easily slide the cylinder sleeve 10 onto the print roller in doing so the cylinder sleeve 10 slides properly on an air.