Valmet Ab

Valmet Aktiebolag

Tord Gustavsson

Karl-Johan Tolfsson

Leif Videgren

Göran Ekström

Jan Paulsson

Elin Engqvist

Goeran Ekstroem

Stefan PÅLSSON

The invention relates to an arrangement arranged to introduce a three-dimensional structure in a paper during production of said paper in a paper making machine (). The arrangement comprises a heat roll () arranged to dry a wet paper web and an extended nip roll () arranged to form a transfer nip (TN) with said heat roll (). The extended nip roll () is provided with a flexible jacket () arranged around the circumferential area of said extended nip roll (). An external surface of said flexible jacket () is provided with a textured portion () and when the wet paper web passes the transfer nip between said extended nip roll () and said heat roll (), said textured portion () of the external surface of the flexible jacket () will impart a three-dimensional texture to the paper web.

Paper making machine, an extended nip roll and a method of producing tissue paper

The invention relates to an extended nip roll () capable of forming a press nip (N) with a counter roll () which press nip (N) has an extension in a machine direction when the extended nip roll () cooperates with the counter roll (). The extended nip roll () comprises a flexible jacket; an elastic press body () arranged inside the flexible jacket. The top side () of the press body () is beveled in such a way that, in the machine direction, a working surface () of the top side has a downstream end () which, in the machine direction, is followed by an exit side surface () that diverges from the interior surface () of the flexible jacket (). The press body () further has at least a first and a second internal pressure chamber (). The pressure chambers () can be pressurized such that the press body () expands. The first internal pressure () chamber has an extension in the machine direction that does not extend beyond the working surface () and the second internal pressure chamber () is located downstream of the first internal pressure chamber () and has an extension in the machine direction beyond the downstream end () of the working surface (). The working surface () and the exit side surface () are made of a material that has a higher shore A hardness than the material in the rest of the press body (). The invention also relates to an extended nip press and a paper machine in which the extended nip roll is used. The invention further relates to a method of operating the extended nip press.

Extended nip roll, an extended nip press making use of the extended nip roll, a papermaking machine and a method of operating an extended nip press

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Borgvik, Sweden

Tord Gustavsson