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EP0803011B1 - Procede et dispositif pour determiner l'effet du reglage d'actionneurs - Google Patents

Procede et dispositif pour determiner l'effet du reglage d'actionneurs Download PDF

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Publication number
EP0803011B1
EP0803011B1 EP96937230A EP96937230A EP0803011B1 EP 0803011 B1 EP0803011 B1 EP 0803011B1 EP 96937230 A EP96937230 A EP 96937230A EP 96937230 A EP96937230 A EP 96937230A EP 0803011 B1 EP0803011 B1 EP 0803011B1
Authority
EP
European Patent Office
Prior art keywords
web
final control
process according
control elements
effect
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP96937230A
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German (de)
English (en)
Other versions
EP0803011A1 (fr
Inventor
Rudolf Münch
Wolfgang Griech
Ulrich MAILÄNDER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0009—Paper-making control systems
    • D21G9/0027—Paper-making control systems controlling the forming section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/09—Uses for paper making sludge
    • Y10S162/10—Computer control of paper making variables
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/09—Uses for paper making sludge
    • Y10S162/10—Computer control of paper making variables
    • Y10S162/11—Wet end paper making variables

Definitions

  • the invention relates to a method and a device to determine the effect of the adjustment of actuators according to the preambles of Claims 1 and 20 (see DE-A-4 238 037, US-A-5 400 247).
  • a possible web property cross profile regulation must be switched off during the test.
  • the accuracy with which the impact locations of the adjusted actuators are determined is determined by the number of transverse profile measurements are available, or by the distance individual data values. This distance is usually 1 cm to 10 cm. In any case, it is achieved accuracy is not sufficient to get out of determined locations an exact cross-shrink cross profile to determine as the following sample calculation shows:
  • the locations of the control elements are exactly known across the width of the production machine. Two actuators that are as far apart as possible are adjusted. The distance x s of these actuators is known. The distance between the profile changes x p can be measured.
  • Shrinkage ((x s - x p ) / x s ) 100%.
  • the measuring task is, for example, the Clarify question at which point of the paper web the shrinkage is minimal, whether it is symmetrical, how the edges of the paper web compared to the Behave in the middle etc.
  • the shrinkage must therefore be as possible small areas on the paper web if possible be measured precisely to create a meaningful cross-shrink cross profile to obtain.
  • a paper web becomes several actuators distributed over the web width via a control system in which the individual process impact of each actuator from the process impact of the others Actuators are separated or decoupled, so that a process control is possible via independent channels.
  • the Actuators based on a theoretical dynamic model of the Paper machine controlled without coupling effect. Measured via sensors Output signals are generated using a mathematical decoupling model evaluated in the form of an adjustable decoupling matrix. The initial values of the theoretical model of the paper machine without Coupling effect with the output values of the adjustable Decoupling model compared. The decoupling matrix is then in the Continuously adjusted to align these values.
  • the calculation of the impact is made using cognitive values about the Behavior of the material web properties.
  • the arithmetic Determination of the impact is compared with actually before and after an actuator adjustment Measured values obtained from a web property cross profile, in order to coordinate the knowledge values that the calculation results are as accurate as possible with the measured results on the impact to match.
  • a prediction about the Form of impact will be taken, for example about the extent of the impact at the impact location or the amplitude of the change in web properties at the place of impact. This procedure too is relatively easy to carry out and leads to make the prediction about the place of impact is very easy to optimize.
  • a method is particularly preferred in which such actuators are taken into account that anyway used to manufacture the material web and for setting the cross profile of the material web properties are needed.
  • the process is characterized in that there is none additional devices or actuators needs that the installation space of the facility Enlarge the production of the material web, the construction and increase production costs and if necessary also require additional maintenance.
  • the ongoing production of the Material web not through an actuator adjustment disturbed, which is used only for measuring purposes. The ongoing production therefore remains unaffected.
  • a method is preferred in which the predictions be gradually modified in such a way that First a general statement about the Behavior of the material web properties met which is particularly characterized by that even with a bad "noise to useful signal Ratio "still with good accuracy can be hit quickly.
  • a simple statement could be, for example: The edges of the paper web are a certain amount shifted from the position they are in Machine should have at the measuring point if there is there would be no shrinkage and no lateral running. The two amounts of the shift are to be determined.
  • a first refinement of this statement would be, for example:
  • the cross shrink is on the edges stronger than in the middle and the resulting Cross shrink cross profile has a bowl-shaped Contour whose amplitude is to be determined.
  • a method is particularly preferred, in which an averaging of the results in the determination the cross shrink cross profile for a number of predictions and / or for a number of Actuator adjustments is carried out.
  • a such averaging causes the error to occur the mathematical determination of the impact on a Minimum is reduced.
  • the above task is also accomplished by a facility solved that mentioned in claim 20 Features includes.
  • the fact that the computing unit Predictions or knowledge values about the behavior of the web properties at Adjustment of an actuator processed and based of these knowledge values and by means of an assignment rule calculates the impact, it is possible at any time, the place of change an actuator can be assigned to predict online and an exact cross profile of a material web property to determine and / or a lateral To determine the offset of the path.
  • different material web properties can be used be detected, for example the weight per unit area, the moisture, the transverse shrinkage, the fiber layer, the roughness, the strength, the Elasticity, opacity, smoothness, filler content, the thickness, the formation. As a cross section are recorded across the width of the web Called measured values.
  • a water-pulp suspension via a headbox which may also include fillers comprises, introduced into a wire section (former) and that the fibrous web formed there -for example paper-web- over a press section Dryer section is fed.
  • the headbox can be designed so that actuators intended to influence the material properties are.
  • the water-fiber suspension a so-called secondary material flow are supplied, for example from dilution water or from a second type of paper stock, but with a different, preferably less Consists of consistency.
  • the transverse distribution in Headbox is through multiple sectional feed lines set, each one as an actuator have designated control valve.
  • Actuators of the type mentioned here can also in other places on the paper machine, for example in a steam box in the press or dryer section or in an aftertreatment facility, for example in one Coating machine can be provided.
  • Figure 1 is a device 1 for determination the effect of actuator adjustments, which here in addition to determining a Cross-shrink cross-profile and to record the lateral course serves.
  • the material web 3 is shown from left to right by the representation in Figure 1 directed, which is indicated by an arrow is.
  • a headbox is dashed on the left in FIG 5 drawn, the numerous across the Material web 3 has distributed actuators 7, only one of which is shown here. The others are outside the display level of Figure 1.
  • the actuators 7 are via a control line 9 connected to a computing unit 11.
  • a measuring device 13 for determination of web property cross sections. This can for example at the end of a paper making machine be arranged beyond the dryer section. However, it is also possible to use several such measuring devices inside the paper making machine to provide.
  • the measuring device 13 is via a measuring line 15 connected to the computing unit 11. Via an input line 17 can add -bottom more detailed dealt with - information about the cross section the material web 3 into the computing unit 11 can be entered. Be on an output line 19 the calculation results of the computing unit 11 are output.
  • FIG. 1 shows a schematic bar diagram 21 are drawn, indicated on the basis of this supposed to be the different across that of the web 3 distributed actuators 7 different Have settings.
  • a schematic Diagram 23 reproduces the one from the measuring device reproduces the measured signal. Corresponding the various settings of the actuators 7 and other process parameters result different measurement signals across the web width. The jagged line indicates that the Measurement signal strongly from measurement noise and process disturbances is superimposed.
  • FIG. 1 For this purpose, several diagrams are shown one above the other in FIG.
  • An actuator 7/1 is located, for example, at a distance x 1 from this reference line 25 and here has a "positive” setting with a corresponding "width effect”.
  • Another actuator 7/2 has a distance x 2 from the reference line 25.
  • the "width effect” here denotes the width of the effect of the actuator adjustment at the point of impact.
  • a local increase in the cross profile, which can be attributed to an adjustment of the actuator 7/1, is recognizable, as is a local decrease in the cross profile, which is based on a change in the actuator 7/2.
  • the procedure is refined by a priori knowledge of shrinking behavior, for example and the course of the path in the calculation to incorporate the hypotheses. This can the number of hypotheses to be examined clearly be reduced.
  • actuators are taken into account to the usual ongoing setting of the Cross profile are required.
  • actuators that affect the headbox. So it can be as Actuator a control valve or a mixing valve in the headbox supply lines become.
  • actuators Facilities for example the heating capacity of the dryer section in zones can influence the web width differently.
  • the procedure described here or Establishment for determining the impact of a Actuator adjustment is in all cases can be used in the same way. According to what has been said here can therefore also be used actuators that the weight per unit area, the moisture, the density or another property of material respectively Affect paper web.
  • a prediction is made where on the one hand only a few sizes can be determined and on the other hand, a lot of manipulated values and profile measurements be available. This applies, for example for a prediction of the total transverse shrinkage the paper web and the cross to the paper web measured- place in the cross profile where shows the change in an actuator. In the Such prediction can be taken into account a reliable determination of the locations very quickly happen, even if the manipulated variables are very small Are compared to process noise.
  • the most accurate possible cross-shrink cross-section it is preferred to have the most accurate possible cross-shrink cross-section to be able to calculate after everyone Adjustment of an actuator 7 the cross-shrink cross-section determined with the aid of the computing unit 11, by comparing the predicted impact with the impact actually measured and the knowledge values based on the deviations be modified until there is a better one or best possible match between predicted and calculated impact.
  • the calculated results x " n are determined taking into account many actuator adjustments.
  • the device shown in Figure 1 only a measuring device 13. However, it is also possible within a manufacturing device respectively Paper machine several measuring points Direction of conveyance of the material web seen - one behind the other to arrange. It can then be the cross-shrink cross-section in several places within the machine can be calculated, so that conclusions can be derived from how the transverse shrinkage changed between different measuring points Has.
  • Another application of the invention is the influence of a special treatment of the material web in a suitable after-treatment facility, for example sizing or rewetting a paper web, on the cross shrink on-line to observe. Then are out of the shrinkage change other process variables, for example glue pick-up of the paper, derivable. These process variables can then be used to determine further intervention be used.
  • a special treatment of the material web in a suitable after-treatment facility for example sizing or rewetting a paper web
  • influencing factors on shrinkage could be adjusted in the area of the wet part, the press, the dryer section.
  • Other influencing factors are conceivable. What influencing factors are practically usable, will look after one longer use of the presented method for on-line Measurement of cross-shrink cross-section automatically point out.
  • Figure 3 shows a paper making machine 31 with a headbox 33 that matches the headbox 5 according to FIG. 1 is comparable. Furthermore the papermaking machine 31 also has one sieve section 35 referred to as former, a press section 37 and a dryer section 39. This is adjustable with at least one zone Steam box 41 provided, with the help of that Cross profile of the material web 43, for example that Dryness cross profile can be influenced.
  • the paper making machine 31 also has a computing unit 45 which corresponds to the one in FIG computing unit 11 shown is comparable.
  • the headbox 33 is with the computing unit 45 connected via signal lines 47 and 49, via the on the one hand, for example, the actual position of various Actuators of the headbox 33 detected can be and which on the other hand serve Forward control signals to the actuators.
  • the paper making machine 31 is also still provided with a measuring device 51 which the in Figure 1 corresponds to the measuring device 13 shown and the 53 measurement signals via a signal line the computing unit 45 delivers. This can be done with a Monitor 55 be provided on which both measuring and control signals can also be displayed.
  • a cross profile of a material web can be influenced because the local Material web properties through a targeted Adjustment of various actuators, be it from Actuators in the headbox or in a steam blower box, can be influenced.
  • the special important application of the invention be, namely on the basis weight cross profile control or on the hiring of a predetermined basis weight cross-section of a material web on a headbox.
  • Figure 4 shows a two-layer headbox purely by way of example 33, together with a schematic shown line system for feeding various Fibrous suspensions.
  • the headbox 33 comprises a nozzle 57 which is known in the art Way by two yourself across the width of the Papermaking machine 31 extending current guiding walls 57a and 57b is limited.
  • the power supply walls 57a, 57b are known each Turbulence generator 59 with a medium stationary Partition 61 connected.
  • the partition 61 is in turn by means of a joint 63 a slat 65 pivotally attached. Deviating the slat can also be rigidly attached to the partition 61 be attached.
  • a first main stream which consists of a first Paper grade exists, passes through a cross distribution line 67 and branched off from one of them Row of sectional feed lines 69 to one of the two turbulence generators 59.
  • Deviating from the illustration chosen in FIG. 4 can be in each of the sectional feed lines 69 an actuator designed as a volume flow controller be provided.
  • Each of the feed lines 77 thus carries a controllable one sectional side stream to one Mixing point 81, where it with one of the sectional Main material flows is mixed.
  • the method is suitable for prediction on the one hand about the place of impact of an actuator adjustment but also on the other hand about the course of the web properties near the place of impact, so about the form of impact.
  • the predictions about the form of the impact i.e. across the width of the Impact at the point of impact and via the amplitude changes in web properties on Impact, are measured by comparison with Values gradually improved. In this way, an overlay of the Effect of an actuator adjustment with the effects neighboring actuator adjustments predicted become. It turns out that the Range of effects of adjusting an actuator is often so wide that it spans several Actuators extends.
  • both a cross shrink cross profile a material web can be determined exactly as well the lateral run of the material web within the manufacturing machine.
  • the cross shrink cross profile is an important quality parameter the generated web of interest, on the other hand, enables it also draws conclusions about the function of the Production machine.

Landscapes

  • Paper (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Claims (23)

  1. Procédé de détermination de l'effet d'un réglage d'actionneurs (7) utilisés dans la fabrication d'une bande de matériau (3), répartis sur la largeur de la bande et agissant sur les caractéristiques de la bande de matériau, une prévision de l'effet du réglage des actionneurs étant effectuée lors du réglage d'au moins un actionneur (7) à partir des valeurs connues du comportement du profil transversal des caractéristiques de la bande lors de la modification d'actionneurs (7), au moins un profil transversal des caractéristiques de la bande étant mesuré avant et après le réglage des actionneurs (7), la prévision de l'effet des réglages des actionneurs étant comparée à l'effet mesuré et les valeurs connues existantes étant modifiées, jusqu'à ce que l'on obtienne une meilleure concordance entre l'effet prévisible et l'effet mesuré, caractérisé en ce qu'une prévision des endroits d'effet des réglages des actionneurs et/ou une prévision de la forme géométrique des effets est effectuée.
  2. Procédé selon la revendication 1, caractérisé en ce qu'une prévision de la forme géométrique des effets est effectuée et que l'ampleur de l'effet est prévisible pour chaque endroit d'effet respectif.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'une prévision de la forme géométrique des effets est effectuée et que l'amplitude de la modification des caractéristiques de la bande de matériau est prévisible dans chaque endroit d'effet respectif.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le profil transversal du retrait transversal est déterminé à partir des endroits d'effet.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'allure latérale de la bande de matériau (3) est déterminée à partir des endroits d'effet.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que seul est pris en compte le réglage des actionneurs (7) qui sont nécessaires pour l'ajustement continu des profils transversaux des caractéristiques de la bande.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le réglage des actionneurs (7) n'est choisi que dans la mesure où il est nécessaire à l'ajustement continu des profils transversaux des caractéristiques de la bande.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le réglage des actionneurs (7) s'effectue par une régulation automatique des profils transversaux des caractéristiques de la bande.
  9. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le procédé est réalisé automatiquement par un ordinateur de commande (11) .
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le procédé est réalisé en ligne.
  11. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le réglage des actionneurs (7) est pris en compte pour agir sur le grammage, l'humidité et/ou la densité de la bande de matériau (3).
  12. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que les valeurs connues du comportement des caractéristiques de la bande de matériau sont obtenues tout d'abord sur la base d'informations simples et générales sur le comportement des caractéristiques de la bande de matériau.
  13. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que les valeurs connues sont modifiées par incréments, une information si possible simple et générale sur le comportement des caractéristiques de la bande de matériau étant donnée tout d'abord avant une prévision restituant le profil transversal effectif de la bande de matériau (3) aussi précisément que possible.
  14. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on réalise le procédé selon l'une quelconque des revendications 1 à 13 après chaque réglage des actionneurs (7).
  15. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une communication ou un filtrage des résultats est réalisé lors de la détermination de l'effet pour un certain nombre de prévisions et/ou pour un certain nombre de réglages des actionneurs se suivant successivement dans le temps et/ou pour un certain nombre de mesures de profil transversal individuelles.
  16. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le degré de concordance entre la mesure et la prévision est déterminé par le calcul, de préférence au moyen d'un calcul de corrélation ou par une évaluation de l'écart quadratique moyen.
  17. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on prend en compte les effets mesurés de réglages des actionneurs lors de la fabrication d'une bande de matériau (3) comme en particulier une bande de papier ou de carton à partir d'une suspension d'eau et de matière fibreuse, dans laquelle on utilise une pluralité d'actionneurs (7) répartis sur la largeur de la bande et agissant au moins sur l'une des caractéristiques de la bande (par exemple le grammage spécifique), et dans laquelle on mesure au moyen d'un dispositif de mesure (13) le profil transversal desdites caractéristiques de la bande et l'on obtient des grandeurs de réglage à partir des valeurs de mesure qui agissent de telle sorte sur les actionneurs (7) que le profil transversal souhaité des caractéristiques de la bande s'ajuste.
  18. Procédé selon la revendication 17, caractérisé en ce que le profil transversal du retrait transversal déterminé constitue la base d'une surveillance et d'une action en ligne sur le profil transversal du retrait transversal lui-même.
  19. Procédé selon la revendication 17, caractérisé en ce que le profil transversal du grammage est régulé par une quantité de matière fibreuse ajustable de manière sectionnelle dans une caisse de tête (5).
  20. Dispositif (1) pour déterminer l'effet du réglage d'actionneurs (7) utilisés dans la fabrication d'une bande de matériau (3), répartis sur la largeur de la bande et agissant sur les caractéristiques de la bande de matériau, en particulier pour réaliser un procédé selon l'une quelconque des revendications 1 à 18, comprenant un dispositif de mesure (13) pour détecter le profil transversal d'une caractéristique de la bande de matériau, comprenant des actionneurs (7) pour agir sur le profil transversal de la caractéristique de la bande de matériau et comprenant une unité de calcul (11) pour déterminer l'effet d'un réglage des actionneurs, caractérisé en ce que dans l'unité de calcul (11) sont traitées des valeurs connues du comportement des caractéristiques de la bande de matériau lors du réglage d'un actionneur (7), afin d'effectuer une prévision des endroits d'effet de réglages des actionneurs et/ou une prévision de la forme géométrique des effets.
  21. Dispositif selon la revendication 20, caractérisé en ce que l'unité de calcul (11) détermine l'effet en ligne au moyen des valeurs connues.
  22. Dispositif selon la revendication 20, caractérisé en ce que plusieurs dispositifs de mesure (13) disposés les uns derrière les autres dans la direction d'avance de la bande de matériau sont prévus.
  23. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est prévu des actionneurs (7) pour la fabrication d'une bande de matériau (3), en particulier une bande de papier ou de carton.
EP96937230A 1995-11-14 1996-10-25 Procede et dispositif pour determiner l'effet du reglage d'actionneurs Revoked EP0803011B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19542448A DE19542448A1 (de) 1995-11-14 1995-11-14 Verfahren und Einrichtung zur Ermittlung der Auswirkung der Verstellung von Stellgliedern
DE19542448 1995-11-14
PCT/EP1996/004639 WO1997018349A1 (fr) 1995-11-14 1996-10-25 Procede et dispositif pour determiner l'effet du reglage d'actionneurs

Publications (2)

Publication Number Publication Date
EP0803011A1 EP0803011A1 (fr) 1997-10-29
EP0803011B1 true EP0803011B1 (fr) 2001-04-25

Family

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Application Number Title Priority Date Filing Date
EP96937230A Revoked EP0803011B1 (fr) 1995-11-14 1996-10-25 Procede et dispositif pour determiner l'effet du reglage d'actionneurs

Country Status (7)

Country Link
US (1) US6207017B1 (fr)
EP (1) EP0803011B1 (fr)
AT (1) ATE200810T1 (fr)
CA (1) CA2210200A1 (fr)
DE (2) DE19542448A1 (fr)
NO (1) NO973248D0 (fr)
WO (1) WO1997018349A1 (fr)

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US6080278A (en) * 1998-01-27 2000-06-27 Honeywell-Measurex Corporation Fast CD and MD control in a sheetmaking machine
DE19806402A1 (de) * 1998-02-17 1999-08-19 Voith Sulzer Papiertech Patent Verfahren zum Zusammenführen zweier Suspensionsschichten sowie Eindickvorrichtung
DE19843729A1 (de) 1998-09-24 2000-03-30 Voith Sulzer Papiertech Patent Verfahren und Vorrichtung zur Verbesserung des Schrumpfungs-Querprofils
DE19911395A1 (de) 1999-03-15 2000-09-21 Voith Sulzer Papiertech Patent Vorrichtung zum Bestimmen von Eigenschaften einer laufenden Materialbahn und/oder einer Maschine zu deren Herstellung und/oder Veredelung
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FI107964B (fi) 1999-12-31 2001-10-31 Metso Paper Automation Oy Menetelmä ja laitteisto paperikoneen toimilaitteen kohdistuksen identifioimiseksi
DE10011067A1 (de) 2000-03-07 2001-09-13 Voith Paper Patent Gmbh Verfahren zur Herstellung und Weiterverarbeitung von Papier
DE10305606A1 (de) * 2003-02-11 2004-08-19 Voith Paper Patent Gmbh Maschine zur Herstellung einer Faserstoffbahn
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CA2210200A1 (fr) 1997-05-22
WO1997018349A1 (fr) 1997-05-22
EP0803011A1 (fr) 1997-10-29
NO973248L (no) 1997-07-11
DE19542448A1 (de) 1997-05-15
US6207017B1 (en) 2001-03-27
ATE200810T1 (de) 2001-05-15
DE59606824D1 (de) 2001-05-31
NO973248D0 (no) 1997-07-11

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