Patent ID: 8246885
Filing Date: 2012-08-21
Classification: B31F,Y10T

Abstract:
1. A set of steel cylindrical elements designed for combining multi-ply absorbent sheets, the first cylindrical element being externally smooth and the second cylindrical element being externally provided with elements in relief, the external hardness of the first cylindrical element being less than that of the second cylindrical element, and the said set making it possible to combine the various plies of the sheets under pressure by passing them into the gap between their generatrices, the second cylindrical element having a hardened external surface, the first cylindrical element being pressed against the second cylindrical element so as to apply to the absorbent sheet a specific pressure lying between 40 and 250 N/mm2; wherein the first cylindrical element has a hardened superficial layer mounted on a deformable sub-layer so as to form a shield; and wherein a difference in external hardness between the first and the second cylindrical element lies between 2 and 20 HRC.