Voith Paper Patent Gmbh

Voith Sulzer Papiertechnik Patent Gmbh

Voith Patent Gmbh

Thomas Augscheller

Karl Steiner

Roland Mayer

Georg Kleiser

Markus Oechsle

Gerhard Kotitschke

Ulrich Begemann

Joachim Grabscheid

Peter Kahl

Uwe Matuschczyk

Frank Wegehaupt

Ingolf Cedra

Karl Josef B&ouml;ck

Klaus Hermann

Karl Josef Böck

Florian Wegmann

Stefan Dette

A system for computer assisted monitoring of a cross profile of a quality parameter of a material web, especially a paper or cardboard web during its production and/or conversion, which includes a measuring system for measuring the cross profile, at least one computer based operations and logic unit for the determination of the standard deviations of at least two interference profiles that are representative for different interferences in the form of different peak groups in the measured cross profile. The different peak groups differentiate in that their peaks have different width ranges. Elements for storage, display and/or further processing of the determined standard deviations are also included.

System for computer assisted monitoring of a cross profile of a quality parameter in a material web

Press section and process for dewatering a fibrous material web that includes a plurality of rolls arranged to form at least three nips and at least one endlessly circulating dewatering belt associated with each nip. Each at least one endlessly circulating dewatering belt is structured and arranged to guide the fibrous material web through its respective nip and to receive water squeezed out of the fibrous material web in the respective nip. The plurality of rolls include at least one press roll having a smooth surface arranged to contact a surface of the fibrous material web and an endlessly circulating, smooth transfer belt is structured and arranged to contact a surface of the fibrous material web opposite the surface contacting the smooth surface of the at least one press roll and to support the fibrous material web through at least one of the at least three nips.

Press section

Device and process for removing a fibrous material web from a drying section of a machine for producing and/or refining the fibrous material web and into a catch device. The drying section includes heated drying cylinders, guidance rolls, and at least one drying wire arranged such that the fibrous material web is guided through the drying section over the heated drying cylinders and the guidance rolls at least predominately by the at least one drying wire. The device includes at least one controllable separating device arranged to at least reduce an adhesion force between the fibrous material web and the at least one drying wire.

Removal device

Process and apparatus for monitoring web breaks in a machine for producing a material web includes at least one impingement dryer. The process includes guiding the material web through the at least one impingement dryer, and monitoring the material web for web breaks in at least one of a region, viewed in a web travel direction, before an intake into the at least one impingement dryer, after an exit from the at least one impingement dryer and within the at least one impingement dryer. The process further includes at least partially deactivating the at least one impingement dryer when a web break is detected.

Process for monitoring web breaks

Press section of a machine and process for producing a fiber web. The press section includes at least two press nips arranged in succession in a web travel direction. Each of the at least two press nips is formed by two press rolls. At least one continuously revolving press belt is guided around each press roll. At least one of before and after at least one of the at least two press nips, a guide region is formed in which two of the press belts are arranged to run jointly along a straight path, and the fiber web is adapted to run between the two press belts along the straight path. Guide elements are arranged at an end of each guide region. At an end of each guide region, the press belts are guided over the guide elements to run separately from one another, and a press belt angle between the press belts at the guide elements is greater than approximately 15&deg;. The process includes successively pressing the fiber web in the at least two press nips, and jointly guiding the fiber web between two of the press belts in the at least one guide region. The at least one guide region includes a substantially straight path. The process also includes separating the two press belts at the guide element at the end of the at least one guide region at a separation angle of at least 15&deg;.

Press section and process

Apparatus and process in a machine for at least one of producing and processing the fibrous web. The apparatus includes an essentially water-free traveling surface adapted to guide the fibrous web, and a measuring device positioned and adapted to detect moisture content of the fibrous web while the fibrous web is supported by the essentially water-free traveling surface. The process includes guiding the fibrous web on the essentially water-free traveling surface, and detecting a moisture content of the fibrous web while the fibrous web is supported by the essentially water-free traveling surface.

Process and apparatus for detecting moisture content in a supported fibrous web

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Bachhagel, Germany

Thomas Augscheller