Voith Sulzer Papiertechnik Patent Gmbh

Voith Sulzer Papiermaschinen Gmbh

Voith Patent Gmbh

Thomas Mack

Markus Oechsle

Robert Wolf

Joachim Grabscheid

Wolfgang Mayer

Roland Mayer

Frank Wegehaupt

Anton Schmitt

Tri Chau-Huu

Christoph Adams

Marco Popp

Martin Dauner

Frank-Udo Schönborn

Xiaowu Zhang

Guenter Bonk

Bettina Grashof

Andreas Haux

Torben Schlieckau

Guenther Kriechbaum

A method for operating a heating group subsystem of a machine for the production or treatment of a fibrous web. The heating group subsystem includes a first heating group and a last heating group and at least one additional heating group; in each case having at least one device that is heated with pressurized heating steam. Viewed in a direction of travel, the fibrous web is fed first through the first heating group, then through the at least one additional heating group, and thereafter through last heating group. The steam pressure of the heating steam of the at least one additional heating group is adjusted lower than the respective steam pressure of the heating steam of first heating group and of last heating group.

Method for operation of a heating group subsystem, and heating group subsystem

Process and apparatus for drying a material web. The process includes guiding the material web to at least one heated area having a jacket surface of a cylinder having a diameter of between about 4-10 meters, setting the material web, having a dry content of between about 45-55%, onto the at least one heated area, maintaining the material web in uninterrupted contact with the at least one heated area at least until the material web achieves a firmness sufficient for detaching the material web from the heated area, and detaching the material web from the at least one heated area with a dry content of between about 55%-65%.

Process and device for drying of a material web

Process and apparatus for drying a material web. The process includes guiding the material web to at least one heated area, maintaining the material web in uninterrupted contact with the at least one heated area at least until the material web achieves a firmness sufficient for detaching the material web from the heated area. The apparatus includes at least one heated area arranged to receive the material web. The at least one heated area includes a removal zone arranged for the removal of the material web from the at least one heated area. The at least one heated area has a length is sufficient to achieve a sufficient firmness of the material web to be removed in the removal zone.

Drying section of a machine for producing a material web. The drying section includes a support roll with an associated impingement dryer, and at least one straight or curved section forming at least a part of a closed path between a last nip of a press section adjacent the drying section and the support roll. The support roll and the impingement dryer are arranged to guide the material web over the support roll, and, thereby, to subject the material web to at least one of hot air and hot steam impingement. The at least one straight or slightly curved section is structured and arranged to form at least one of an impingement drying section and a transfer foil section.

Drying section

A drying cylinder for drying a fibrous web, the cylinder having an inner chamber connected to a pressurized air source; and an outer cylinder jacket having an air-permeable region which is adapted to contact the fibrous material web. Also a drying section for drying a fibrous web, including at least one drying cylinder having an inner chamber and an outer cylinder jacket having an air-permeable region; a circulating belt arranged to press the fibrous web against the outer cylinder jacket and belt being arranged to partially wrap around the drying cylinder; and a pressurized air source connected to the inner chamber is described. Finally, a process for drying a fibrous web in an apparatus that includes at least one drying cylinder having an inner chamber and an outer cylinder jacket having an air permeable region, the process including pressurizing the inner chamber of the drying cylinder with air; and guiding the fibrous material web partially around the drying cylinder with a circulating belt wherein the circulating belt presses the fibrous material web against the air permeable portion of the cylinder jacket is described.

Heated drying cylinder

A machine for producing a sheet, e.g., paper or cardboard, in which the machine may include a plurality of rolls having a bearing pin located at each end and a bearing device retaining each bearing pin. The bearing device may be utilized to guide the bearing pin on all sides, enabling a base of the bearing device to be arbitrary positioned at an angle 0.degree.&lt;.alpha.&lt;90.degree. with respect to a horizontal reference, e.g., the ground or a base surface. The plurality of rolls may include dryer cylinders and/or sheet guide rolls.

Machine for producing a sheet

The invention is directed to an apparatus to produce layers of material, such as paper, carton or cardboard, under use of at least one roll that can be heated in a controlled manner, in particular a dryer cylinder, with tubing attached to the end of the roll that supplies the energy necessary to heat up the roll. Bearings at both ends of the roll are mounted to a seating structure. One of the bearings is a freely carrying bearing and the steam supply is rigidly attached to the seating structure.

Heated roll bearing system

Growing community of inventors

Sontheim, Germany

Thomas Mack