Metso Paper Inc.

Valmet Corporation

Valmet Technologies, Inc.

Eero Suomi

Vilho Nissinen

Juha Lipponen

Arto Karjalainen

Pekka Koivukunnas

Kari Holopainen

Mika Viljanmaa

Kari Juppi

Pekka Linnonmaa

Markku Kyytsönen

Antti Heikkinen

Harri Kuosa

Heikki Kettunen

Reijo Pietikäinen

Risto Sutti

Mikko Tani

Kari Hasanen

Tapio Mäenpää

Kari Sipi

Markku Kyyts&ouml;nen

Henri Vaittinen

Tony Lehto

Ville Hopponen

Matti Tervonen

Juhani Toppari

Jani Hakola

Tapio M&auml;enp&auml;&auml;

Tapio M&auml;enpaa

Maria Lepola

Mika Tammenoja

Juhani Partanen

Arto Ikonen

Matti LEPPÄNEN

Pauli KYTÖNEN

Markku KIRVESMÄKI

Kari Martikainen

Pekka Vantola

A booster for a digital hydraulic controller which has at least one digital valve (). The booster is connected to a magnetic coil () of a valve stem () of the digital valve () by at least two voltages () wherein one voltage () is higher than the other voltage (). The invention also relates to a method for using a booster in connection with a digital hydraulic controller.

Booster for a digital hydraulic controller and method for using a booster in connection with a digital hydraulic controller

A processing device and method applying the same for processing a coated or uncoated fibrous web is provided. The device comprises a belt configured to extend around a guiding element, at least one counter-element being disposed outside said belt to provide a contact area with the belt, such that the belt and the counter-element establish therebetween a web processing zone for passing a web to be processed therethrough. The processing zone length is defined by the disposition of the belt's guiding element and/or by the configuration of the counter-elements. The contact pressure applied to a web in the processing zone is within the range of between about 0.01 MPa and about 200 MPa.

Processing device and method of operating the device for processing a coated or uncoated fibrous web

The invention relates to a method by means of which the machine-direction moisture of a web being coated can be controlled in an optimal manner that takes into account moisture content changes along the entire path of the coating and drying process. Advantageously, all the dryers the coater section are controlled in an integrated manner in order to obtain a controlledly processed product which is optimized in regard to energy consumption and product quality. Each process section and unit contributing to the drying of the web is identified by means of a mathematical submodel describing the specific evaporation rate in the respective process section/unit and, by chaining these submodels, a composite model is compiled for the entire process, whereby the composite model makes it possible to manage the drying operation in the process so that the individual units are controlled as a portion of the overall process.

Method for controlling the moisture of a web in machine direction on a coating machine

The invention concerns a method for detecting a contamination and damaging of a face ( ) that runs through a nip or nips (N . . . N ) in a calendar for paper. In the method vibrations occurring in connection with the constructions ( ) of a calendar are detected and processed. The vibrations are detected by at least one vibration detector ( ) fitted in connection with the bearing supports of calendar rolls ( ) or in connection with constructions ( ) related to said bearing supports. By the way of these vibration detectors the calendar roll(s) ( ) is/are identified from which the vibration derives. In the method , it is possible to observe the rotation of all of the rolls to be monitored and to measure vibration from any suitable point whatsoever, for example from the frame ( ) of the machine, by employing at least one vibration detector ( ), the time (T ) of the cycle of the vibration signal obtained from said detector(s) being compared with the numbers of revolutions of the rolls to be monitored. In this way, the source of the disturbance is determined, and action is taken in order to eliminate the disturbance.

Method for detecting contamination and/or damaging of a face that runs through a nip or nips in a calendar for paper

A method for detecting contamination on or damage to a web-contacting face in a paper machine or a paper finishing machine, including the steps of detecting vibrations of the web-contacting face over a period of time by means of a plurality of detectors arranged in association with the machine and determining the location of the contamination on or damage to the web-contacting face based on the time the vibrations were detected.

Method for detecting contamination and/or damage in a face running through a nip in a paper machine or in a paper finishing machine

A method and apparatus for producing calendered paper by an on-line manufacturing system comprising at least a paper machine and a multi-nip calender. The method comprises following steps: removing water from a formed paper web by pressing, drying the pressed paper web by at least one dryer, calendering the dried web by the multi-nip calender, measuring a cross-machine moisture profile or a variable relative thereto, and altering the moisture of the web so that the moisture profile of the web in the cross-direction is even when the web enters the first nip of the calender.

Method for producing calendered paper

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Hämeenlinna, Finland

Eero Suomi