EP0278260A2 - Dispositif de tamisage - Google Patents

Dispositif de tamisage Download PDF

Info

Publication number
EP0278260A2
EP0278260A2 EP88100660A EP88100660A EP0278260A2 EP 0278260 A2 EP0278260 A2 EP 0278260A2 EP 88100660 A EP88100660 A EP 88100660A EP 88100660 A EP88100660 A EP 88100660A EP 0278260 A2 EP0278260 A2 EP 0278260A2
Authority
EP
European Patent Office
Prior art keywords
sorting
sieve
space
sorting unit
sorting apparatus
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.)
Granted
Application number
EP88100660A
Other languages
German (de)
English (en)
Other versions
EP0278260B1 (fr
EP0278260A3 (en
Inventor
Walter Musselmann
Herbert Kinzler
Reimund Rienecker
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.)
JM Voith GmbH
Original Assignee
JM Voith 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.)
Filing date
Publication date
Application filed by JM Voith GmbH filed Critical JM Voith GmbH
Priority to AT88100660T priority Critical patent/ATE61429T1/de
Publication of EP0278260A2 publication Critical patent/EP0278260A2/fr
Publication of EP0278260A3 publication Critical patent/EP0278260A3/de
Application granted granted Critical
Publication of EP0278260B1 publication Critical patent/EP0278260B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D21D5/023—Stationary screen-drums
    • D21D5/026—Stationary screen-drums with rotating cleaning foils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B07B1/20—Stationary drums with moving interior agitators

Definitions

  • the invention relates to a sorting apparatus according to the preamble of claim 1.
  • Such an apparatus has become known from US 38 98 157.
  • the machine used in the last stage of sorting e.g. sorting waste paper
  • the separation process must be carried out in such a way that on the one hand the fiber loss is as low as possible, but on the other hand the highest possible removal of impurities is achieved.
  • the last sorting level determines the efficiency of the entire sorting.
  • Known power stage sorters are e.g. Vibration sorter. These machines require relatively large screen areas and high material dilutions in order to achieve a reasonably satisfactory sorting effect. The sieves are also very susceptible to clogging.
  • the object of the invention is to provide a sorting device which allows sorting even with the finest perforations in the screen, in which in particular the rejects are to be separated and the fiber losses are to be kept small, a continuous mode of operation should also be possible and also a continuous one Deduction of the specific light impurities should be possible.
  • the sorting apparatus consists of two sorting units 40 and 50 connected in series.
  • the first sorting unit 40 has a rotationally symmetrical, here cylindrical sieve 8, which encloses an annular sieve space 1, which is formed between the sieve 8 and a drum-like rotor part 5, which is the first sorting unit 40 assigned.
  • the inlet 19 for the suspensions is located at the end of the first sorting unit 40 facing away from the second sorting unit 50, and an outlet from the accepted material space 2 surrounding the sieve 8 is designated by 18.
  • the rotor has sorting elements 16 in the form of wings or Foils that have a good sorting effect. The rotor is driven via shaft 7 and is not shown here.
  • the second sorting unit 50 shows, consist of (outer) accept material space 4, inner, ring-shaped sieve space 3 or 3 zylindr, cylindrical sieve 9 and rotor part 6 with the sorting elements 17. However, here they are simply designed as radial ribs.
  • the screen space is depressurized here and is freely connected to the atmosphere via its end 3 ⁇ via outlet 31.
  • an aperture 11 is interposed, which leaves a gap 12 on the rotor and thus influences the flow between the two sieve spaces. This also maintains the excess pressure in relation to the surrounding atmosphere in the screen space 1.
  • the accepting material space 2 surrounding the sieve space 1 or sieve 8 is sealed off from the atmosphere by an outlet valve or slider 30 on the outlet connection 18 and is thus kept under excess pressure.
  • the pressure is preferably between 0.4 and 1.6 bar.
  • the sorting apparatus could also be arranged with a vertical rotor axis.
  • annular disk 7 which acts as a diaphragm, is also provided in the second sieve chamber 3. It leads to a certain congestion in the first part of the sieve space, so that the rejects only gradually pass into the sieve space part 3 ⁇ located at the outlet end.
  • the dilution water supplied ensures that as many fibers as possible are still washed out and recovered.
  • the diaphragm 11 is accommodated in a diaphragm housing 13 and can also be designed as an adjustable iris diaphragm. This makes it possible to adapt the flow conditions when passing from the first sieve chamber 1 to the second sieve chamber 3, even during operation. This is particularly important if very different types of material, e.g. different types of waste paper, are used.
  • a retaining ring 34 on the end of the sieve space 3 ⁇ adjacent to the reject material discharge 31 prevents the suspension from passing through this sieve space too quickly. This leaves enough time for the suspension, which is heavily contaminated, to be dewatered, so that the rejects with a high consistency of e.g. 15, 20 or more% can come out of the rejects outlet 31.
  • the first zone A relates to a pure sorting part with the rotor 5 or 5 ⁇ (the same or similar parts are identified in the current figures with the same reference numerals, but with dashes), followed by a washing zone B, 1 corresponds to the screen space 3, which is separated by damming rings 7 and 7 ⁇ from a third zone C, which acts as a drainage zone.
  • inner diameter d 1 of the diaphragm 11 is 8 or 8 ⁇ and 9 or 9 im in relation to the diameter of the sieves - assuming the same diameter once - d 1 / D is 0.3 to 0.7.
  • the inner diameter of the retaining rings 7 and 7 ⁇ and 34 d2 and d3 to the sieve diameter are d2 / D equal to d3 / D equal to 0.4 to 0.8.
  • the angle of inclination y of the retaining rings 7, 7 ⁇ and 34 against the rotor axis is at least 75 °, preferably between 80 and 83 °.
  • the speed of the rotor blades or elements radially outside is between 10 and 25 m / s.
  • the sorting apparatus is to be used for the final stage sorting (i.e. reject sorting) and therefore requires relatively fine sieve openings.
  • hole diameters of sieve 8 or 8 ⁇ between 0.8 and 2.6 mm would be possible, for relatively very fine sorting tasks, perforations would be possible Slit form between 0.15 and 0.8 mm.
  • the slot widths for the screen basket 9 or 9 ⁇ of the second screen area would be between 0.15 and 0.5 mm.
  • hole diameter or the choice of holes or slots naturally depends on the waste paper to be sorted, its degree of soiling and the type of soiling. It can be said that the hole widths for relatively fine sorting tasks in the form of round holes can have diameters between 0.6 and 1.4 mm.
  • the pressure build-up in the first sorting part 40, 40 ⁇ enables high throughput due to the orifice and the pressure build-up enables the use of sieves with the finest perforations, as stated in the text.
  • the dilution water can preferably be added by means of lines 26 connected obliquely, for example in the tangential direction, to the strainer basket 9 or 9 'in the region of the washing zone B. Additional measures can be taken here to prevent the dilution water from escaping from the screen area there too quickly.
  • This can be, for example, an unperforated area 25 of the screen basket 9 or 9 ⁇ serving as a locking plate (see FIG. 2). This is also shown in cross section BB of FIG. 2.
  • the rotor elements which are used to circulate the suspension in the screen space 1 or 1 ⁇ of the first sorting unit 40 or 40onia, can be hydrofoils 16, but also projections 23 with a sharp edge at the front in the direction of rotation with a radial abutting surface, as in FIGS 3 shown. In this case, these rotor elements are continuous strips which extend over the length of the rotor part. However, they can also be divided several times and then be distributed approximately evenly over the outer surface of the rotor drum as shorter elements.
  • this washing zone B which is formed by the first zone of the second sorting unit 50 ⁇ adjacent to the screen space of the first sorting unit 40 ⁇ , one outside of the screen 9 ⁇ on all sides delimited acceptable substance space 14 ⁇ create, as shown in Fig. 3A. It is formed by a circumferential, cylindrical sheet 41 and two ring walls 44 and 45 on each end face. A line 42 leads out of this accepted substance space, the cross section of which can be controlled by the valve 43. This makes it possible in a special way that the washing water also fulfills its function and thus separates as many fibers as possible from the soiling, which are then sorted out by the sieve 9 ⁇ .
  • so-called hydrofoils are provided with respect to the first rotor part, that is to say rotor blades provided with an airfoil profile, which have approximately the same length as the rotor part.
  • the rotor elements 28 are fastened to the helical surfaces provided on both front ends of the rotor part 5 ⁇ , which are formed by feed screws 36 which are of a single-start design here.
  • the first rotor part 5 ′′′ carries rotor blades in the form of inclined ribs. Due to the inclined position, the suspension is also transported faster from one axial end to the other of the rotor 5 ′′′.
  • the rotor parts 5 ⁇ and 5 ′′′ of Figures 4 and 5 have as the base body open support drums which are held on one end face by means of support flanges 38 on the rotor shaft 27 ⁇ . These support flanges have holes 39 through which the introduced suspension initially flows in the axial direction near the rotor shaft through the rotor drum to the other axial end of the rotor drum, where it then reverses and arrives at the sorting elements 28 and 24, respectively, through the sieve 8 ⁇ to be sorted.
  • the screw conveyors 36 are set up so that they support the flow of the suspension towards the sorting elements 24 and 28, depending on the direction of rotation. In this way, recirculation of the suspension occurs.
  • the recirculation of the impurities retained on the screen results in a concentrated detection of the specifically light impurities and impurities in the center of the rotor drum 5 ⁇ and a lower long fiber concentration in the overflow portion, i.e. more long fibers are sorted out through the sieve 8 ⁇ and fed to the accept. This simplifies both the subsequent washing and dewatering process and, of course, also reduces fiber loss.
  • rotor elements in the form of simple ribs or plates are preferably used, in FIGS. 1 to 5 with 15 and 17 respectively. Their radial dimension is between 25% and 45% of the respective inner diameter of the sieve in question.
  • these plates 22 are arranged somewhat obliquely to the generatrix of the outer surface of this rotor part. They are distributed approximately in a helical pattern over the outer surface.
  • Fig. 8 it is shown that the second screen basket 9 ⁇ of the second sorting unit 50 ⁇ can taper conically up to the outlet end in the overflow 31.
  • the taper is approximately between 3 and 6 °, as shown.
  • the incline could of course be much stronger.
  • the radially outer edge of the sorting wing 17 ⁇ adapts to this conical sieve shape. This could improve the dewatering of debris (rejects).
  • the screen basket 9 ′′′ of the second sorting unit 50 ′′′ is cylindrical, but a central central axis is inclined upwards towards the overflow end 31 toward the rotor central axis. As in FIG. 8, this inclination could also be chosen to be between 3 and 6 °. Also in this case, the radially outer edge of the rotor blades 17 ′′′ must adapt to this inclination according to FIG. 8.
  • the variant according to FIG. 10 has in the first part an annular sieve space 305 which is formed between a rotationally symmetrical sieve basket 308 and a drum-like rotor part 300 which the sorting element 16 ⁇ carries.
  • the diameter of the first sieve 308 is significantly larger than that of the second sieve 311, the difference is therefore more than 20%, preferably more than 50%.
  • suspensions come with a relatively lower amount Dirt content, but in question for high throughputs.
  • the suspension is fed in via line 74, while the cleaned fiber suspension is withdrawn from the accepting material chamber 304 via line 75.
  • Dilution water in the second sieve space 312 can also be fed in via the line 66 and perforations in the upper, drum-shaped rotor part, and also through the hollow part of the shaft 318 in the transition region between the first and second sieve space.
  • a baffle plate 324 is also attached to the rotor shaft 318.
  • the cleaned fiber suspension behind the second sieve 311 is drawn off through line 78.
  • a plurality of ejection vanes 61 preferably with a radial extension, are provided at the rejects outlet of the second sieve chamber 312 on the drum part of the rotor in order to better convey the rejects into the discharge channel 60 can.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Centrifugal Separators (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Filtration Of Liquid (AREA)
  • Removal Of Specific Substances (AREA)
EP88100660A 1987-02-07 1988-01-19 Dispositif de tamisage Expired - Lifetime EP0278260B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88100660T ATE61429T1 (de) 1987-02-07 1988-01-19 Spuckstoffsortierer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873703831 DE3703831A1 (de) 1987-02-07 1987-02-07 Spuckstoffsortierer
DE3703831 1987-02-07

Publications (3)

Publication Number Publication Date
EP0278260A2 true EP0278260A2 (fr) 1988-08-17
EP0278260A3 EP0278260A3 (en) 1989-02-15
EP0278260B1 EP0278260B1 (fr) 1991-03-06

Family

ID=6320510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88100660A Expired - Lifetime EP0278260B1 (fr) 1987-02-07 1988-01-19 Dispositif de tamisage

Country Status (9)

Country Link
US (1) US4911828A (fr)
EP (1) EP0278260B1 (fr)
JP (1) JPS63288290A (fr)
KR (1) KR960004539B1 (fr)
AT (1) ATE61429T1 (fr)
BR (1) BR8800535A (fr)
CA (1) CA1330207C (fr)
DE (2) DE3703831A1 (fr)
ES (1) ES2021399B3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0355530A1 (fr) * 1988-08-04 1990-02-28 Valmet-Tampella Oy Procédé et dispositif pour l'épuration et le traitement d'une pulpe
EP0529548A1 (fr) * 1991-08-30 1993-03-03 Aikawa Iron Works Co., Ltd. Appareil de tamisage pour la fabrication du papier

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE464640B (sv) * 1988-06-16 1991-05-27 Kamyr Ab Apparat foer silning av en suspension av en fiberhaltig cellulosamassa
SE464473B (sv) * 1988-11-17 1991-04-29 Sunds Defibrator Ind Ab Silanordning
US5172813A (en) * 1989-05-17 1992-12-22 A. Ahlstrom Corporation Method and an apparatus for treating fiber suspension
SE465038B (sv) * 1989-11-22 1991-07-15 Kamyr Ab Apparat foer avskiljning av partiklar ur en massastroem och fraktionering av denna
US5119953A (en) * 1990-04-02 1992-06-09 Celleco Hedemora Ab Pulp suspension screening and fractionation apparatus
US5433849A (en) * 1993-09-15 1995-07-18 Lyco Manufacturing, Inc. Double drum waste water screen
US6155427A (en) * 1996-11-14 2000-12-05 Thermo Black Clawson Inc. Zoned pressure screen
GB2319196B (en) * 1996-11-14 1998-11-04 Black Clawson Co Zoned pressure screen
SE509289C2 (sv) * 1997-04-14 1999-01-11 Sunds Defibrator Ind Ab Silanordning med rejektförstrypning
SE512957C2 (sv) 1999-03-29 2000-06-12 Valmet Fibertech Ab Silanordning med ett roterbart och ett stationärt silorgan
SE514071C2 (sv) 1999-04-08 2000-12-18 Valmet Fibertech Ab Silanordning med axiellt förskjutbar spaltring
AT408771B (de) * 2000-02-03 2002-03-25 Andritz Ag Maschf Sortierer zur reinigung einer faserstoffsuspension
KR100485929B1 (ko) * 2002-11-14 2005-04-29 한국염색기술연구소 회전 스크린 및 싸이크론 세정탑을 이용한 분진 및 악취제거장치
PY1336349A (es) * 2012-08-13 2016-12-01 Icm Inc Aparato de cribado de múltiples zonas
US11103811B2 (en) 2016-11-04 2021-08-31 Icm, Inc. Mechanical separation devices
FI20175776A1 (fi) 2017-08-31 2019-03-01 Andritz Oy Erotuslaite
US12134049B2 (en) 2018-06-10 2024-11-05 Icm, Inc. Mechanical separation device

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1092389A (en) * 1912-04-25 1914-04-07 Theodor Qviller Pulp-strainer.
US1209264A (en) * 1915-11-24 1916-12-19 Philip J Clune Sanitary protector.
US1537691A (en) * 1923-08-16 1925-05-12 American Voith Contact Co Centrifugal screen
GB372760A (en) * 1930-12-11 1932-05-11 Horace Waring Improvements in or relating to the drying and/or filtration of mixtures of liquids and solids
GB399300A (en) * 1932-08-05 1933-10-05 Frank Pascall Improvements in sifting or bolting machines for flour and other granular or pulverulent material
US2974796A (en) * 1957-09-04 1961-03-14 Jung Johannes Centrifugal-type pulp separator
US3394809A (en) * 1965-01-25 1968-07-30 Hunter Allen Bruce Pulp screens
FR1448814A (fr) * 1965-04-15 1966-08-12 Ingersoll Rand Canada Appareil de tamisage
US3616904A (en) * 1968-06-11 1971-11-02 Ahlstroem Oy Apparatus for treating discrete materials
FI51221C (fi) * 1972-06-21 1976-11-10 Yhtyneet Paperitehtaat Oy Painesihtilaite.
CA1009583A (en) * 1973-03-23 1977-05-03 S.W. Hooper And Co. Ltd. Two stage pressure pulp screen device with stationary cylindrical screen
SU606635A1 (ru) * 1976-02-11 1978-05-15 Государственный проектно-конструкторский институт "Гипромашуглеобогащение" Грохот
DE2712749A1 (de) * 1977-03-23 1979-02-08 Finckh Maschf Sortierer zum sichten von fasersuspensionen
DE2850385C2 (de) * 1978-11-21 1981-02-05 J.M. Voith Gmbh, 7920 Heidenheim Vorrichtung zum Ausscheiden von Verunreinigungen aus Faserstoffsuspensionen
US4440635A (en) * 1979-03-29 1984-04-03 Haigh M. Reiniger Process and apparatus for the recovery of cellulose fibers from paper-plastic mixtures
US4267035A (en) * 1979-08-27 1981-05-12 The Black Clawson Company Pressurized rotary screening apparatus
DE3006482C2 (de) * 1980-02-21 1983-04-14 J.M. Voith Gmbh, 7920 Heidenheim Rotationssortierer
US4302327A (en) * 1980-03-17 1981-11-24 The Black Clawson Company Center flow screening apparatus
FR2498650B2 (fr) * 1981-01-23 1986-03-21 Lamort E & M Dispositif pour l'epuration et la recuperation de pate a papier
US4396502A (en) * 1982-03-18 1983-08-02 Beloit Corporation Screening apparatus for a papermaking machine
DE3221788C1 (de) * 1982-06-09 1983-11-03 J.M. Voith Gmbh, 7920 Heidenheim Rotierbare Sortiertrommel
US4462900A (en) * 1982-07-16 1984-07-31 Beloit Corporation Centrifugal pulp screening device and method
DE3238742A1 (de) * 1982-10-20 1984-04-26 Escher Wyss Gmbh, 7980 Ravensburg Verfahren zum sortieren von faserstoff, insbesondere fuer die herstellung von papier sowie sortiervorrichtung zur ausfuehrung des verfahrens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0355530A1 (fr) * 1988-08-04 1990-02-28 Valmet-Tampella Oy Procédé et dispositif pour l'épuration et le traitement d'une pulpe
EP0529548A1 (fr) * 1991-08-30 1993-03-03 Aikawa Iron Works Co., Ltd. Appareil de tamisage pour la fabrication du papier
US5443213A (en) * 1991-08-30 1995-08-22 Aikawa Iron Works Co., Ltd. Screen apparatus for paper making

Also Published As

Publication number Publication date
EP0278260B1 (fr) 1991-03-06
ES2021399B3 (es) 1991-11-01
DE3703831C2 (fr) 1988-12-08
KR960004539B1 (ko) 1996-04-06
BR8800535A (pt) 1988-09-27
EP0278260A3 (en) 1989-02-15
KR880010188A (ko) 1988-10-07
ATE61429T1 (de) 1991-03-15
US4911828A (en) 1990-03-27
CA1330207C (fr) 1994-06-14
DE3703831A1 (de) 1988-09-08
DE3861867D1 (de) 1991-04-11
JPS63288290A (ja) 1988-11-25

Similar Documents

Publication Publication Date Title
EP0278260B1 (fr) Dispositif de tamisage
DE1761600C3 (de) Vorrichtung zum Sichten von Faserstoffaufschwemmungen
DE3400423C3 (de) Verwendung einer von einer Fasersuspension überströmbaren Lochplatte zum Klassieren
EP0034780B1 (fr) Dispositif de triage rotatif
DE68917150T2 (de) Siebanordnung.
DE2518112C2 (de) Vorrichtung zur Behandlung von Papierfasern
EP1215335B1 (fr) Tamis sous pression pour l'épuration de pâte à papier contenant des impuretés
DE2063516B2 (de) Trommelsiebvorrichtung fuer faserstoffsuspensionen
DE2027028A1 (de) Siebmaschine für Fasersuspensionen
EP0235605B1 (fr) Dispositif de tamisage pour pâte à papier
DE69314034T2 (de) Siebvorrichtung für faserbrei
DE2611886C3 (de) Gerät zum Sortieren und Entstippen von Fasersuspensionen
EP0146641A1 (fr) Tamis à trier pour suspensions de fibres de pâte
CH627952A5 (de) Vorrichtung zum trennen unerwuenschter verunreinigungen von erwuenschten fasern.
EP0567726B1 (fr) Dispositif de tamisage
DE19702044C1 (de) Sichter für eine Faserstoffsuspension
DE19911884A1 (de) Drucksortierer zum Sieben einer Papierfaserstoffsuspension und Siebräumer für einen solchen
DE10115298A1 (de) Drucksortierer zum Entfernen von Störstoffen aus einer störstoffhaltigen Papierfasersuspension
DE3210385C2 (de) Sortiertrommel
DE102004047948B4 (de) Sortierer
WO2020193003A1 (fr) Trieur sous pression, élément de tamisage et procédé pour la fabrication d'un élément de tamisage
DE2208549A1 (de) Verfahren und Vorrichtung zum Reinigen und Fraktionieren von Teilchensuspensionen
DE4432842C2 (de) Verfahren zum Ausbringen unerwünschter Feststoffpartikel aus einer wässerigen Faserstoffsuspension sowie Vorrichtung zu seiner Ausführung
DE19625726C1 (de) Siebvorrichtung mit spaltförmigen Öffnungen
DE3015370C2 (de) Siebkorb für Sortierer der Papierindustrie

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: A2

Designated state(s): AT BE CH DE ES FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19890225

17Q First examination report despatched

Effective date: 19890629

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 61429

Country of ref document: AT

Date of ref document: 19910315

Kind code of ref document: T

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3861867

Country of ref document: DE

Date of ref document: 19910411

ITF It: translation for a ep patent filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19950109

Year of fee payment: 8

EAL Se: european patent in force in sweden

Ref document number: 88100660.5

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

Ref country code: NL

Payment date: 19950131

Year of fee payment: 8

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

Ref country code: BE

Effective date: 19960131

BERE Be: lapsed

Owner name: J.M. VOITH G.M.B.H.

Effective date: 19960131

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

Ref country code: NL

Effective date: 19960801

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19960801

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

Ref country code: GB

Payment date: 19961216

Year of fee payment: 10

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

Ref country code: ES

Payment date: 19970122

Year of fee payment: 10

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

Ref country code: SE

Payment date: 19970124

Year of fee payment: 10

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

Ref country code: CH

Payment date: 19970219

Year of fee payment: 10

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

Ref country code: GB

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

Effective date: 19980119

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: 19980120

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 19980120

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: 19980131

Ref country code: CH

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

Effective date: 19980131

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980119

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed

Ref document number: 88100660.5

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20000201

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

Ref country code: FR

Payment date: 20030116

Year of fee payment: 16

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

Ref country code: AT

Payment date: 20030121

Year of fee payment: 16

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

Ref country code: DE

Payment date: 20030205

Year of fee payment: 16

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

Ref country code: AT

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

Effective date: 20040119

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: 20040803

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: 20040930

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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: 20050119