... machine was made for cardboard from the roller paper ! we can making 3 ,5 ,and 7layer machine! ... Single facer, Overhead bridge conveyor, double decks heater for liner, Gluer, Double facer, Slitter scorer, Cutter ... be also used as outer packing material for light or small-sized commodities. Five flutes A, B, ... heating system are optional . Automatic High speed Corrugated board production line machine