Abstract: An assembly for preparing a box blank from a cardboard sheet. The assembly comprises a feeder for vertically feeding one of a plurality of the cardboard sheets from a storage position into a printing/cutting assembly, the printing/cutting assembly comprising a printing station comprising at least one printer head and a vertical conveyor for conveying a printing surface of the cardboard sheet proximate to and past the at least one printer head, wherein the printing surface is printed by the at least one printer head during the conveying, and a cutting station. Each of the printer heads and each of the cutting blades is vertically moveable respectively into a selected printing position and a selected cutting position under control of a controller thereby accommodating a plurality of different cardboard sheets of different sizes.