Abstract: The present invention relates to a means for manufacturing section multi-ply cardboard of narrow, less than 30 cm wide, thermoplastic-coated cardboard webs. The means comprises a heating means for heating cardboard webs which are conducted into the means with the aid of guides, substantially one above the other and mutually spaced, nozzles being disposed in the interstices of the webs to direct flames against the surfaces of the webs; a profilator with rolling members, into which the cardboard webs, heated of their surfaces, are conducted for pressing them together between the rolling members and for rolling to desired section or profile shape; and a cooling means for cooling the section or profile.