Valmet Oy

Pertti Soikkanen

Martti Koponen

Risto Turunen

A machine for manufacturing paper, such as tissue paper, includes a twin-wire former made up of a rotary forming roll and a pair of endless fabrics, each of which may be a wire or felt, lapped around the rotary forming roll to provide twin-wire web formation therewith. At the location where these endless fabrics travel beyond the forming roll they diverge from each other to define between themselves a diverging space where one of the endless fabrics has an upwardly directed surface on which the web is carried beyond the forming roll. This latter endless fabric carries the web to a press section where this latter endless fabric travels with the web through a first press nip of the press section defined between an inner press roll situated within the loop of the latter endless fabric and an outer press roll situated outside of the latter loop. This outer press roll is lapped by an additional endless fabric structure so that the web is situated at the first press nip between the latter additional fabric structure and the endless fabric which carries the web away from the forming roll. The web travels with the additional fabric structure around the outer press roll, to become detached from the endless fabric which carries the web away from the forming roll, and this outer press roll cooperates with a drying cylinder of a drying section of the paper machine to define therewith at least a second press nip.

Growing community of inventors

Jyvaskyla, Finland

Pertti Soikkanen