Patent ID: 6540873
Filing Date: 2003-04-01
Classification: D21F

Abstract:
A board machine for making a multilayer cardboard web with a printable surface, comprising:a wet section comprising a first forming unit for forming a first board layer on a forming wire, and at least one additional forming unit for forming at least one additional board layer and couching the first board layer with the additional board layer(s) to form the multilayer cardboard web; and a press section comprising at least a first double-felted press that receives the multilayer web from the forming section, the first double-felted press being formed by an upper press member and a lower press member forming a nip therebetween, the lower press member comprising a press roll and being disposed within a loop of a lower press felt, the upper press member being disposed within a loop of an upper press felt, the upper and lower press felts passing through the nip with the multilayer web sandwiched therebetween; wherein the forming and press sections are structured and arranged such that the printable surface is formed on the first board layer and the forming wire of the first forming unit carries the multilayer web up to the double-felted press, the upper press felt picks up the multilayer web from the forming wire such that the printable surface faces downward and contacts the lower press felt as the multilayer web passes through the nip, and the lower press felt has a smoother web-contacting surface than that of the upper press felt so as to exert a greater adhesion force on the multilayer web.