Metso Paper Karlstad Ab

Albany International Corporation

Johan Ragard

Frank Stephen Hada

Jeffrey Dean Holz

Paul Douglas Beuther

Ingvar Berndt Erik Klerelid

Hans Ivarsson

Karl-Johan Tolfsson

Joergen Israelsson

Kimberly Downing

Viktor Bergstroem

The invention relates to a method of making tissue paper in a machine for making tissue paper and in which method a fibrous web is passed through at least one press nip together with a texturing belt. The texturing belt has a side that faces the fibrous web in the press nip and the surface of that side is a web contacting surface that is textured. The texturing belt can be selected such that the tissue paper that is manufactured obtains desired values for one or several parameters. The invention also relates to a machine for making tissue paper. The machine comprises a forming section, a drying cylinder, a press having a first press unit and a second press unit between which press units a nip is formed. The second press unit is preferably a shoe roll. The machine also comprises a drying cylinder which is arranged to be heated from the inside by hot steam and on which a fibrous web can be dried by heat. A texturing belt is arranged to run in a loop through the nip and to the drying cylinder such that a fibrous web can be carried by the texturing belt to the drying cylinder and transferred to the drying cylinder. The side of the texturing belt that contacts the fibrous web comprises a layer of a polymer material such that the polymer material will contact the fibrous web and cavities are formed in that surface of the texturing belt that comes into contact with the fibrous web.

Method and a machine for of making tissue paper

An apparatus for transferring a wet paper web from a press nip to a drying cylinder of a papermaking machine, and for structuring the web, includes an impermeable transfer belt that passes through the press nip along with the paper web, and a permeable structuring fabric for transfer of the web onto the drying cylinder, the structuring fabric being arranged in a loop within which a suction transfer device is disposed. A web-contacting surface of the belt has a non-uniform distribution of microscopic-scale depressions, and a suction zone of the transfer device includes a transfer point spaced a distance D from the press nip. The belt is arranged to bring the web into contact with the structuring fabric in the suction zone for a length L, such that suction is exerted on the paper web to transfer the paper web from the belt onto the structuring fabric at the transfer point.

Apparatus with an impermeable transfer belt in a papermaking machine, and associated methods

A papermaking machine for making paper includes a forming section, a press section, and a drying section. The paper web is pressed between two press members while enclosed between a press felt and a transfer belt having non-uniformly distributed microscopic depressions in its surface, the web following the transfer belt from the press to a transfer point at which the web is transferred via a suction transfer device onto a structuring fabric, the web then being dried on a drying cylinder. The transfer point is spaced a distance D from the press nip selected based on machine speed, a basis weight of the web, and the surface characteristics of the transfer belt, such that within the distance D a thin water film between the web and the transfer belt at least partially dissipates to allow the web to be separated from the transfer belt.

Methods employing an impermeable transfer belt in a papermaking machine

An apparatus for transferring a wet paper web from a press nip to a drying cylinder () of a papermaking machine, and for structuring the web, comprises an impermeable transfer belt () having a web-contacting surface, the wet paper web passing through the press nip enclosed between a press felt () and the transfer belt, and a permeable structuring fabric () for transfer of the web onto the drying cylinder, the structuring fabric having a structured surface and being arranged in a loop within which a suction transfer device () is disposed, said suction transfer device having a suction zone (). According to the invention the web-contacting surface of the belt has a non-uniform distribution of microscopic-scale depressions, and that the suction zone includes a transfer point () spaced a distance D from the press nip along which the belt runs, the belt being arranged to bring the web into contact with the structuring fabric in the suction zone for a length L, such that suction is exerted on the paper web to transfer the paper web from the belt onto the structuring fabric. at the transfer point.

Papermaking machine employing an impermeable transfer belt, and associated methods

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Karlstad, Sweden

Johan Ragard