A cardboard-handling system with a rule-die associated to a first drum and a counter die associated to a second drum for pre-treating cardboards. A cardboard-alignmentor on a first side of the rule-die and counter-die aligns and conveys a cardboard together with one or more synchronized-cardboard transferors toward a side-gripper conveyor. The side-gripper conveyor transfers the cardboard toward and through the rule-die and counter-die drums for pre-treatment of the cardboard. Next the side-gripper conveyor conveys the cardboard toward and through a laser-treatment module to be further pre-treated. The side gripper conveyor movement is synchronized with a laser-treatment module for which a base with a plurality of protruding elements has moving capabilities and is synchronized with the side-gripper conveyor (via a timing belt for example).