MEPP series machines are equipped, unic on the market, with a patented pressure system that give to machine irreplaceable property: the pressure is not given by two rigid plans (system that don't give you uniformity) MEPP pressure is given by a cautciou membrane that swells by the compressed air, this membrane swell giving you an uniform pressure in every square centimeter of the working plane, also when you are using materials with different thickness in the same working cicle.