METHOD AND DEVICE FOR PRODUCING CARDBOARD Russian patent published in 2005 - IPC

FIELD: mechanical working or deformation of paper or cardboard.

SUBSTANCE: method comprises making cardboard product that has at least two layers and gluing the cloths of raw cardboard material which define the layers of the product. At least on of the cloths is worked mechanically in dry condition, preferably no more than 12% of humidity, by means of extruding a relief pattern on it in order to deform the surface of the cloth uniformly. The cloths are glued to each other.

EFFECT: enhanced efficiency.

14 cl, 1 dwg