Complex sentence: In the classical corrugator, the paper is humidified by means of high-pressure steam with the aim of softening the paper fibres so that the formation of the flute and the consequent gluing will go smoothly.
Split into simpler sentences: In the classical corrugator, the paper is humidified by means of high pressure steam. The humidity aims to soften the paper fibres so that the formation of the flute and the consequent gluing will go smoothly.