DRO, printer slotter with die cut machines are based on a combination of in line flexo printing and rotary die cutting. They are used to transform corrugated board sheets into cut and printed sheets. In Printer slotters each colour is printed on a flexo printing unit, put in line one to the other. Cut of case’s shape is performed in a rotary die cutter, which comprises a cylinder mounted with a cutting plate, and an anvil cylinder. The anvil acts as a cutting plate allowing cutting knives to penetrate the corrugated substrate and the creasing rules to create well defined creases. Waste is then stripped.