Single Face Paper Corrugating Machines with Twin Flute Our single face paper corrugating machine comes with twin flute and has edge over the conventional corrugators. This machine is designed with latest hydraulic system to change the flute rolls within few minutes. The hydraulic cylinder lifts the first cassette to one of two standby positions. The second cassette lowers into the operating position where it gets automatically connected to main drive. This machine is used for manufacturing 2 ply paper corrugated boards.