EP0545886B1 - Procédé et dispositif pour drainer une suspension fibreuse sur une bande de tamisage avec un dispositif de drainage - Google Patents

Procédé et dispositif pour drainer une suspension fibreuse sur une bande de tamisage avec un dispositif de drainage Download PDF

Info

Publication number
EP0545886B1
EP0545886B1 EP92890247A EP92890247A EP0545886B1 EP 0545886 B1 EP0545886 B1 EP 0545886B1 EP 92890247 A EP92890247 A EP 92890247A EP 92890247 A EP92890247 A EP 92890247A EP 0545886 B1 EP0545886 B1 EP 0545886B1
Authority
EP
European Patent Office
Prior art keywords
drainage element
screen belt
drainage
edge
stationary
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.)
Expired - Lifetime
Application number
EP92890247A
Other languages
German (de)
English (en)
Other versions
EP0545886A1 (fr
Inventor
Wilhelm Dipl.-Ing. Siller
Roland Dipl.-Ing. Haas
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.)
HAPA-Verwaltungs-Aktiengesellschaft
Original Assignee
HALLEIN PAPIER AG
HAPA-Verwaltungs-Aktiengesellschaft
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.)
Filing date
Publication date
Application filed by HALLEIN PAPIER AG, HAPA-Verwaltungs-Aktiengesellschaft filed Critical HALLEIN PAPIER AG
Publication of EP0545886A1 publication Critical patent/EP0545886A1/fr
Application granted granted Critical
Publication of EP0545886B1 publication Critical patent/EP0545886B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/18—Shaking apparatus for wire-cloths and associated parts
    • D21F1/20—Shaking apparatus for wire-cloths and associated parts in Fourdrinier machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/48—Suction apparatus
    • D21F1/483—Drainage foils and bars

Definitions

  • the invention relates to methods for dewatering, in particular pre-dewatering, of sieve belt-supported fiber-water suspensions, in particular for paper production, which are guided by at least one vibrating dewatering element, preferably foil, and devices for carrying out these methods.
  • dewatering elements preferably foils
  • dewatering elements preferably foils
  • FIG. 1 shows the cross section through such a drainage element or such a foil 1 and a partial longitudinal section through the sieve belt 2 guided over it, through the fleece 3 already formed above it, and through the fiber-water suspension 4 still present.
  • FIG. 1 shows the cross section through such a drainage element or such a foil 1 and a partial longitudinal section through the sieve belt 2 guided over it, through the fleece 3 already formed above it, and through the fiber-water suspension 4 still present.
  • a natural vacuum builds up on the diverging sides between the drainage screen and the surface of the drainage element or foil due to the screen speed. In this way and as a result of gravity, water is withdrawn from the suspension and passed through the screen to the underside of the screen.
  • the well-known foil box mentioned above works on the same principle as a single foil. It consists of a close series of narrow individual foils. Due to the small foil spacing, it leads to microturbulence.
  • the also known cascade foil 7 according to FIGS. 3 and 4 has a similar function as a single foil.
  • the drainage performance can be increased by a sequence of active 8 and passive surfaces 9.
  • the active surfaces are inclined, the passive surfaces parallel to the screen belt.
  • the reduced tubulence formation has a disadvantageous effect.
  • FIG. 5 shows part of a known register roller 10 with the part of a screen belt 11 guided over it.
  • the maximum suction takes place in area 12.
  • the end of suction takes place at 13.
  • Such a device is only used in slow-running paper machines.
  • the use of such rollers is limited by the high pressure and vacuum pulses at higher paper machine speeds. It leads to leaching of fine substances.
  • the aim of the invention is above all to improve the sheet formation of papers produced.
  • formation in the paper sheet means the areal fiber distribution.
  • the sieve belt-supported suspension or fiber material web is first passed over the fixed leading or front edge directed against the sieve belt movement of the at least one vibrating dewatering element, preferably foils, and then guided over a surface of this dewatering element that faces the material web and is movable relative to this edge, while this surface of this dewatering element is at least partially set in vibrations, in particular pivoting movements.
  • the vibration of the drainage element or foil thus achieved changes the vacuum and thus influences the pressure pulses at the next edge of the drainage element or foil in accordance with the oscillation frequency, which results in the fiber flakes being released.
  • the fixed leading edge according to the invention is therefore missing.
  • the leading edge flutters when vibrating and, in contrast to the invention, is therefore not fully fed by the sieve belt.
  • Fiber distribution or turbulence are therefore less favorable than according to the invention, which has a very disadvantageous effect on the sheet formation of the papers produced.
  • the advantageous effects can be intensified if the suspension or material web is guided over at least two drainage elements arranged at a distance from one another, each with a fixed leading edge and a surface facing the material web that is movable relative to this edge.
  • a cheap, space-saving solution is obtained if, according to the invention, the sieve belt-supported suspension or fiber material web is passed over immediately adjacent movable surfaces of the at least one drainage element after passing through the fixed edges or their supports.
  • the frequency and / or the amplitude and / or the quantity or strength of the vibrations of the movable surfaces of the dewatering elements are dependent on the intermediate or final quality of the dewatered, in particular pre-dewatered, fiber material web a regulation of the vibration exciters acting on these movable surfaces can be changed.
  • the frequency of the vibrations can advantageously be set between approximately 50 and 1000 Hz, in particular between approximately 50 and 500 Hz.
  • the speed of movement of the filter belt-supported fiber-water suspension or the filter belt can be regulated between 100 and 2000 m / min.
  • the effects according to the invention can be amplified if, after the Screen-supported suspension over at least one dewatering element with a fixed leading edge and a surface that can be moved with respect to this edge, which is then guided over at least one fixedly mounted, ie not vibratable, dewatering element arranged at a distance from that dewatering element.
  • the at least one vibrating dewatering element preferably foil
  • the at least one vibrating dewatering element is formed with a fixed run-up or front edge directed against the movement of the sieve belt and stands with a - seen in the direction of movement of the sieve belt - set back from this, in particular gradually receding, surface in each case - seen in the direction of movement of the sieve belt - opposite to the Run-up or leading edge movable drain part under the action of at least one vibration exciter or generator.
  • the at least one drainage element is expediently connected to an electrical vibration exciter or generator, which advantageously has an electromagnet with a voice coil.
  • an electrical vibration exciter or generator which advantageously has an electromagnet with a voice coil.
  • the dewatering elements preferably foils
  • a mechanical vibration exciter or generator advantageously a camshaft or a hydraulic or pneumatic pressure cylinder.
  • the operation of the device or system according to the invention can be designed or automated particularly advantageously if the purpose of adjusting the turbulence energy is the surface of the sieve of the vibration exciter or generator and, if applicable, the sieve belt drive and, if appropriate, the suspension feeder are connected to a control system or a control circuit for changing the amplitude and frequency of the movement of the discharge part, in or in the a setpoint is entered in the form of a voltage control of the vibration exciter and is connected to an online formation measurement, in particular the final and / or the intermediate quality of the fiber material web.
  • Fiber material web can be controlled by means of voltage regulation of the vibration generator.
  • devices and systems with several drainage elements or foils can be electrically connected to both for the purpose of generating a superposition frequency of the movements of the drainage parts and connected to the control or the control circuit.
  • Another advantageous practical solution according to the invention is characterized in that the fixed leading edge of the at least one drainage element, preferably the foil, is fixedly mounted or mounted on a compact ramp part, which on its discharge side can be moved elastically with a bridge, independently of the carrier of the drainage element, via a bridge or pivotable drain part is connected.
  • the surface of the at least one drainage element facing the sieve belt can run continuously from the run-up edge to the drain part or to its drain edge, which results in particularly good guidance.
  • the at least one drainage element or the foil can be displaced in the direction of the screen belt when the leading or leading edge is fixed or if the horizontally guided run of the screen belt operates the at least one drainage element or the foil is vertically adjustable or the entire at least one dewatering element or the foil can be pivoted for the purpose of adjusting the angle between the screen belt and the surface of the dewatering element or foil facing it when the leading or leading edge is fixed.
  • a wear strip in particular ceramic strip, can be inserted in the leading edge of the foil.
  • the advantageous effects of the device according to the invention are particularly striking if - as seen in the direction of movement of the sieve belt - at least one fixed bearing, i.e. a fixed bearing edge, i.e. at a distance behind the at least one dewatering element with a fixed leading edge and with a surface movable relative to this edge. non-vibratable, drainage element is arranged.
  • an esur is a cylinder covered with a fine metal fabric, which is immersed in the nonwoven fabric from above.
  • the fleece which has already been partially fixed, is resuspended. Its use is with higher basis weights of e.g. planned from 115 g / m. It is not an actual drainage element.
  • Toothed rollers are also known, which are driven and immerse into the screen from below.
  • the speed and number of teeth results in a certain frequency with which pressure pulses can be introduced into the suspension.
  • To regulate drainage as according to the invention mainly because the vacuum can not be designed in a corresponding manner.
  • FIG. 7 shows a schematic illustration of a device or system according to the invention in a side view
  • FIG. 8 shows a drainage element or a foil according to the invention in a front view
  • FIG. 9 shows a side view, the latter with a screen belt part in the area in question.
  • the dewatering, in particular pre-dewatering section has a driven (see arrow 5) driven belt 2, which is mounted on a machine frame by means of rollers or rollers.
  • a sieve table 16 foils 1, a register roller 10, a cascade foil 7, foil boxes 17, wet vacuum cleaners 18, an erichur 19 and flat vacuum cleaners 20 can be seen.
  • the part 21 of the foil facing the sieve belt 2 has a compact ramp part 22, the ramp edge 23 of which is directed against the movement of the sieve belt (arrow 5!).
  • the part 24 of the foil is connected to the compact part 22 via a thin bridge 25, so that an (elastic) movement of the part 24 relative to the part 22 is possible.
  • a ceramic strip 23 ' can be incorporated in the front edge of the foil.
  • the elastic foil surface is preserved.
  • the part 24 is connected to an electrical vibration generator, which is constructed from an electromagnet and voice coils.
  • the coils are designated 26 and the drive for part 24 with 27; the connection consists of the sleeve 28, the washer 29 and the shaft joint 30.
  • an adjusting screw 30a is provided between the shaft joint 30 and an adjusting plate 31 in this connection.
  • the overall arrangement of the foil with its drive is arranged on a slide-in box 33.
  • the compact part 22 is mounted on the slide-in box 33 by means of the holding strip 34 Countersunk screw 35 and the stable support or rails 36, 37.
  • the adjustment plate 31 is provided between the drain part 24 and the vibration drive.
  • the function of the wire section takes place in the following way:
  • the fiber suspension flows out of the headbox 15 approximately at the wire speed onto the machine.
  • the material jet (with about 0.5-1% solids content, in this machine) strikes the screen table 16 evenly across the entire machine width and is transported through the dewatering screen 2 over the screen section.
  • the built-in drainage elements increase the solids content to around 13 - 15% by the end of the wire section; then it is accepted into the press section.
  • the main area of application of the oscillating foil 1 according to the invention is advantageously in the first third of the wire section (depending on the weight per unit area driven).
  • the formation can only be influenced by turbulence up to about 1.5% solids content.
  • the basic idea when using the oscillating foil 1 according to the invention is the simple controllability of the necessary turbulence energy with undisturbed drainage.
  • the foil which is fixedly mounted on its front edge 23, is made to vibrate on the outlet side 24 via the exciter. By swinging the trailing edge of the foil, a fluctuating vacuum is created (changed foil angle).
  • the vacuum fluctuations generated with this oscillation frequency draw a different amount of water to the underside of the sieve. This results in pressure impulses at exactly the same frequency at the following foil edge.
  • the sieve is deflected over the foil due to the vacuum that is formed, thus causing turbulence on the surface of the sieve.
  • a control loop can be set up via an online formation measurement, by means of which all the basis weight ranges traveled can be optimized by means of setpoint specifications. In this way, long foil setting times when changing the basis weight can be saved.
  • the known static drainage elements work optimally only in a small area (basis weight, speed) and can only be adjusted with relatively great effort.
  • the advantage over the previously known dewatering elements is the infinitely adjustable turbulence energy in every area of the wire section with the same dewatering performance, since practically the entire wire section can be equipped with oscillating foils.
  • An oscillation frequency applied to a single foil according to the invention is physically comparable to an embodiment with several static foils, if one wants to maintain the quality of the product immediately.
  • a high frequency on a single foil according to the invention would correspond to many foil edges according to the prior art at short intervals and, according to the invention, a low frequency on a single foil would correspond to a few foils according to the prior art at large distances from one another.
  • the vibration can also be generated mechanically, for example by a camshaft, or hydraulically or pneumatically by pressure cylinders.

Landscapes

  • Paper (AREA)

Claims (20)

  1. Procédé pour drainer des suspensions (3) en eau et fibres soutenues par une bande de tamisage ou filtration (2) et conduites à travers au moins un élément de drainage (1) capable d'être vibré, particulièrement utilisable pour la production de papier, caractérisé en ce que la suspension soutenue par une bande de tamisage, afin d'influencer la distribution des fibres ou l'énergie de turbulence, est conduite premièrement à travers l'arête fixe d'entrée (23) de l'élément de drainage capable d'être vibré, l'arête étant orientée contre le mouvement (5) de la bande de tamisage, et ensuite à travers une surface de l'élément de drainage (1) orientée vers la nappe de matière et mobile par rapport à cette arête (23) de cet élément de drainage (1), pendant que, au moins en partie, la surface de l'élément de drainage (1) est mise en vibration, particulièrement en mouvement pivotant.
  2. Procédé selon la revendication 1, caractérisé en ce que la suspension est conduite à travers au moins deux éléments de drainage (1) disposés à une distance entre l'un et l'autre, chaque élément comprenant une arête fixe d'entrée (23) et une surface mobile par rapport à l'arête orientée vers la nappe de matière.
  3. Procédé selon la revendication 1, caractérisé en ce que la suspension soutenue par une bande de tamisage, après avoir passée l'arête fixe (23) ou leurs supports, respectivement, est conduite à travers la surface mobile directement avoisinante l'élément de drainage (1) au nombre d'au moins un.
  4. Procédé selon une des revendications 1 à 3, comprenant plusieurs éléments des drainage, caractérisé en ce que la fréquence et/ou l'amplitude et/ou la quantité ou l'intensité des vibrations des surfaces mobiles des éléments de drainage (1) sont modifiées selon la qualité intermédiaire et/ou finale de la nappe de matière drainée au moyen d'un réglage des générateurs de vibrations (26, 27) agissant sur ces surfaces mobiles.
  5. Procédé selon une des revendications 1 à 4, caractérisé en ce que la fréquence des vibrations est ajustée entre 50 et 1000 Hz, particulièrement entre 50 et 500 Hz.
  6. Procédé selon une des revendications 1 à 5, caractérisé en ce que l'ajustage de l'angle désiré entre la bande de tamisage (2) et la surface de l'élement de drainage (1) orientée vers celle-ci ou l'ajustage d'une position zéro des vibrations produites par un générateur de vibrations éléctrique s'effectue au moyen d'une superposition de tension continue.
  7. Procédé selon une des revendications 1 à 6, caractérisé en ce que la vitesse de la suspension en eau et fibres soutenue par une bande de tamisage et/ou la vitesse de celle-ci sont ajustées entre 100 et 2000 m/min.
  8. Procédé selon une des revendications 1 à 7, caractérisé en ce que la suspension soutenue par la bande de tamisage, après être guidée à travers un élément de drainage (1) disposant d'une arête fixe d'entrée (23) et d'une surface mobile par rapport à l'arête, est ensuite conduite à travers un élément de drainage (17, 7, 10) stationaire, c'est à dire incapable d'être vibré, se trouvant à une distance de cet élément de drainage (1).
  9. Dispositif pour effectuer un des procédés selon une des revendications 1 à 8, comprenant au moins un élément de drainage (1) capable d'être vibré et une bande de tamisage conduite à travers l'élément de drainage au nombre d'au moins un, particulièrement utilisable pour la production de papier, caractérisé en ce que l'élément de drainage (1) au nombre d'au moins un capable d'être vibré dispose d'une arête fixe d'entrée (23) orientée contre le mouvement (5) de la bande de tamisage et qu'une surface de cet élément qui - vu en direction de mouvement de la bande de tamisage (2) - est disposée, et particulièrement recule graduellement derrière celle-ci, et qui est située dans la partie de décharge (24) mobile par rapport à l'arête d'entrée (23) disposée - vu en direction de mouvement de la bande de tamisage - dans une position d'arrière, est sous l'influence d'au moins un générateur de vibrations (26, 27).
  10. Dispositif selon la revendication 9, caractérisé en ce que l'élément de drainage (1) au nombre d'au moins un est connecté à un générateur de vibrations (26, 27) éléctrique qui comprend en particulier un électro-aimant avec une self oscillatrice (26).
  11. Dispositif selon la revendication 9, caractérisé en ce que l'élément de drainage (1) au nombre d'au moins un est relié à un générateur de vibrations méchanique, en particulier un arbre à cames ou un vérin pneumatique ou hydraulique.
  12. Dispositif selon la revendication 10, caractérisé en ce que le générateur de vibrations (26, 27) et éventuellement la commande de la bande de tamisage ainsi que éventuellement l'alimentation (15) de la suspension sont reliés, afin d'ajuster l'énergie de turbulence à la surface du tamisage (2), à un réglage pour la modification de l'amplitude et la fréquence du mouvement de la partie de décharge (24), le réglage recevant une valeur de consigne en forme de réglage de tension du générateur de vibrations et étant connecté à une mesure d'épair en ligne, particulièrement concernant la qualité intermédiaire et/ou finale de la nappe de matière fibreuse.
  13. Dispositif selon la revendication 10, caractérisé en ce que la fréquence et/ou l'amplitude et/ou la quantité ou l'intensité des vibrations produites par le générateur de vibrations (26, 27) peuvent être réglées, selon la qualité intermédiaire et/ou finale mesurée de la nappe de matière fibreuse drainée, au moyen de réglage de tension du générateur de vibrations.
  14. Dispositif selon la revendications 12 ou 13, comprenant plusieurs éléments de drainage, caractérisé en ce que les éléments de drainage (1), afin de générer une fréquence hétérodyne des mouvements des parties de décharge (24), sont connectés électriquement et reliés au réglage.
  15. Dispositif selon une des revendications 9 à 14, caractérisé en ce que l'arête fixe d'entrée (23) de l'élement de drainage (1) au nombre d'au moins un est montée d'une façon fixe à une partie d'alimentation (22) compacte qui, à son côté de décharge, est reliée élastiquement à travers un pont (25) à une partie de décharge (24) mobile et/ou pivotable indépendamment du support (36, 37) de l'élément de drainage (1).
  16. Dispositif selon une des revendications 9 à 14, caractérisé en ce que la surface de l'élement de drainage (1) au nombre d'au moins un orientée vers la bande de tamisage (2) passe d'une façon continue de l'arête d'entrée (23) jusqu'à la partie de décharge (24) ou son arête de décharge, respectivement.
  17. Dispositif selon une des revendications 9 à 15, caractérisé en ce que l'élement au nombre d'au moins un est déplaçable en direction de la bande de tamisage (2), l'arête d'entrée (23) étant fixe.
  18. Dispositif selon la revendication 17, caractérisé en ce que, dans la zone du trum ou compartiment, respectivement, de la bande de tamisage (2) conduit horizontalement, l'élément de drainage (1) au nombre d'au moins un est réglé verticalement.
  19. Dispositif selon la revendication 17, caractérisé en ce que l'élément de drainage (1) est pivotable entièrement, afin d'ajuster l'angle entre la bande de tamisage (2) et la surface de l'élément de drainage (1) orientée vers celle-ci, l'arête d'entrée étant fixe.
  20. Dispositif selon une des revendications 9 à 19, caractérisé en ce que - vu en direction de mouvement de la bande de tamisage (2) - au moins un élément de drainage (17, 7, 10) fixe, c'est-à-dire incapable d'être vibré, est disposé à une distance derrière l'élément au nombre d'au moins un qui comprend une arête fixe d'entrée (23) et une surface mobile par rapport à cette arête.
EP92890247A 1991-12-02 1992-11-26 Procédé et dispositif pour drainer une suspension fibreuse sur une bande de tamisage avec un dispositif de drainage Expired - Lifetime EP0545886B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2392/91 1991-12-02
AT239291A AT399735B (de) 1991-12-02 1991-12-02 Verfahren und vorrichtung zur entwässerung von faser-wasser-suspensionen

Publications (2)

Publication Number Publication Date
EP0545886A1 EP0545886A1 (fr) 1993-06-09
EP0545886B1 true EP0545886B1 (fr) 1996-05-15

Family

ID=3533513

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92890247A Expired - Lifetime EP0545886B1 (fr) 1991-12-02 1992-11-26 Procédé et dispositif pour drainer une suspension fibreuse sur une bande de tamisage avec un dispositif de drainage

Country Status (4)

Country Link
EP (1) EP0545886B1 (fr)
AT (1) AT399735B (fr)
DE (1) DE59206300D1 (fr)
ES (1) ES2088570T3 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU874820A1 (ru) * 1980-02-25 1981-10-23 Хабаровский политехнический институт Гидропланка бумагоделательной машины

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1761838B1 (de) * 1968-07-12 1972-01-05 Voith Gmbh J M Entwaesserungsleiste fuer Langsieb-Papiermaschinen
GB1229514A (fr) * 1969-08-04 1971-04-21
US3598694A (en) * 1969-08-15 1971-08-10 Philip Wiebe Mechanical pulsating forming board
US4123322A (en) * 1977-06-24 1978-10-31 Thermo Electron Corporation Drainage foil element having two wire bearing portions
NO865051L (no) * 1986-01-08 1987-07-09 Mk Systems Inc Hydrofoilblad.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU874820A1 (ru) * 1980-02-25 1981-10-23 Хабаровский политехнический институт Гидропланка бумагоделательной машины

Also Published As

Publication number Publication date
ATA239291A (de) 1994-11-15
AT399735B (de) 1995-07-25
ES2088570T3 (es) 1996-08-16
EP0545886A1 (fr) 1993-06-09
DE59206300D1 (de) 1996-06-20

Similar Documents

Publication Publication Date Title
DE3138133C2 (de) Entwässerungseinheit für Langsieb-Papiermaschinen
DE2857473C2 (fr)
DE69409648T3 (de) Dispositif pour detacher et transporter à grande vitesse un voile fibreux en sortie de carde
EP1643022A1 (fr) Procédé pour profiler un non-tissé et dispositif de formation de profils
DE3615370A1 (de) Verfahren und vorrichtung zur bildung einer bahn
DE4128929C2 (de) Vorrichtung zum Herstellen von Fasermaterial oder dergleichen mit vorgebbarem Vorlagegewicht
EP0454989A1 (fr) Section de formage vertical
EP0545886B1 (fr) Procédé et dispositif pour drainer une suspension fibreuse sur une bande de tamisage avec un dispositif de drainage
DE1147470B (de) Vorrichtung zum Herstellen von Bahnen aus Papier, Pappe od. dgl.
DE10329648A1 (de) Vorrichtung zur Vliesbildung
EP0576798B2 (fr) Section de formage à deux toiles
AT402746B (de) Doppelsiebformer mit örtlich verstellbarer entwässerungsleiste
DE3705148C2 (de) Vorrichtung zum zufuehren von fasermaterial in wattevliesform zu einer krempel, karde oder dergleichen
EP0161323A1 (fr) Procédé et dispositif pour obtenir une répartition prédéterminée de poids par unité de surface dans une couche de fibres
DE2534998A1 (de) Verfahren und vorrichtung zum ruetteln des oberlaufes des formbandes im fourdrinierabschnitt einer papiermaschine
DE3823966C2 (de) Vorrichtung zum Führen der Siebe einer Doppelsiebpartie einer Papier- oder Kartonmaschine
EP0031445B1 (fr) Procédé pour agir sur une nappe de fibres pré-égouttée sur un tamis, et appareil pour la mise en oeuvre du procédé
DE69223598T2 (de) Doppelsiebformer in einer papiermaschine
AT501497B1 (de) Florführungsmulde
DE102004047518A1 (de) Verfahren und Schrägsiebformer einer Maschine zur Herstellung einer Faserstoffbahn aus mindestens einer Faserstoffsuspension
AT389534B (de) Vorrichtung zur entwaesserung einer auf einem sieb transportierten stoffbahn
DE60113876T2 (de) Saugkasten mit skimmerleiste
DE19632509A1 (de) Verfahren und Vorrichtung zum Herstellen einer Faserstoffbahn
DE2807313A1 (de) Vorrichtung zum kontinuierlichen breitwaschen einer textilen warenbahn
DE1802004C (de) Entwässerungsvorrichtung für Papiermaschinen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE ES FR IT LI SE

17P Request for examination filed

Effective date: 19930807

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: HAPA-VERWALTUNGS-AKTIENGESELLSCHAFT

17Q First examination report despatched

Effective date: 19941122

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE ES FR IT LI SE

REF Corresponds to:

Ref document number: 59206300

Country of ref document: DE

Date of ref document: 19960620

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: HANS RUDOLF GACHNANG PATENTANWALT

REG Reference to a national code

Ref country code: ES

Ref legal event code: BA2A

Ref document number: 2088570

Country of ref document: ES

Kind code of ref document: T3

ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2088570

Country of ref document: ES

Kind code of ref document: T3

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

26N No opposition filed
REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20000914

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20000918

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20000922

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20000928

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20001124

Year of fee payment: 9

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Free format text: SCA AUSTRIA AG TRANSFER- MODO PAPER HALLEIN AG

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011127

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011127

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011130

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011130

EUG Se: european patent has lapsed

Ref document number: 92890247.7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020702

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020730

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20021213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051126