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EP0034780A2 - Dispositif de triage rotatif - Google Patents

Dispositif de triage rotatif Download PDF

Info

Publication number
EP0034780A2
EP0034780A2 EP81101042A EP81101042A EP0034780A2 EP 0034780 A2 EP0034780 A2 EP 0034780A2 EP 81101042 A EP81101042 A EP 81101042A EP 81101042 A EP81101042 A EP 81101042A EP 0034780 A2 EP0034780 A2 EP 0034780A2
Authority
EP
European Patent Office
Prior art keywords
sorting
drum
sieve
wing
rotary sorter
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
EP81101042A
Other languages
German (de)
English (en)
Other versions
EP0034780B1 (fr
EP0034780A3 (en
Inventor
Werner Schön
Albrecht Dr.-Ing. Meinecke
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 AT81101042T priority Critical patent/ATE24218T1/de
Publication of EP0034780A2 publication Critical patent/EP0034780A2/fr
Publication of EP0034780A3 publication Critical patent/EP0034780A3/de
Application granted granted Critical
Publication of EP0034780B1 publication Critical patent/EP0034780B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • 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

Definitions

  • the invention relates to a rotary sorter for fiber suspensions contaminated with rejects, according to the preamble of patent claim 1.
  • Such a rotary sorter has become known from DE-AS 27 12 715.
  • projections are attached to a rotating drum which rotate with a narrow gap in relation to a screen basket. It is also used in this sorter with the effect that the underpressure which arises at the rear edge (flow edge) of the projections contributes to the fact that fiber pieces and similarly shaped components of the sorts Suspension can pass through the holes of the sieve to be fed to the accept outlet.
  • the negative pressure that arises at this tear-off edge is not very large.
  • the drum or the projections attached to it hardly contribute to the requirement of the suspension through the sorter in the axial direction, separate pressure generation of the fibrous suspension by means of a pump or the like must be provided.
  • the object of the invention is now to bring about a good separation effect of a sorter with as little power as possible.
  • This design of the sorting wings which generate an overpressure or a relatively large negative pressure at the screen gap, ensures that when the wings pass the screen basket, the fibrous material suspension that may be adhering to it is repeatedly loosened from the screen basket, this effect still being caused by the rear end of the wing emerging vertebrae can be reinforced. This gives the parts to be sorted out, the fibers in the fiber suspension, the opportunity to reach holes in the screen basket, to pass through them and in this way to be sorted out of the suspension.
  • the wing profile also has only a low drag coefficient, so that the acceleration of the suspension, particularly in the circumferential direction, is very small, so that the sorter also works relatively poorly for this reason.
  • This design also provides a simple design or manufacturing option for the sorter by simple Twisting off the wings on a lathe is relatively easy to produce the screen gap to be maintained between the radially outer edge of the wing and the screen basket. Tensioning on the wings can also be easily avoided by slightly chamfering the edge of the wing (in the direction of rotation) at the back.
  • the design and arrangement of the sorting vanes according to the invention is also advantageous insofar as the disadvantageous effect of pulsations is largely eliminated by the relatively large number of vanes, since they have only a small amplitude.
  • a preferred further development of the inventive concept lies in the twisting of the wedge surfaces of the sorting vanes in order to produce additional conveying impulse components of the fiber suspension in relation to the screen basket.
  • a rotary sorter consists of an outer housing 20, a drum 1 mounted therein, which rotates within a screen basket 2 with a constant gap and has end walls 41 and 42 at its axial ends.
  • the supply of the fibrous suspension takes place from below through the nozzle 6 directly into the sieving space 3 existing between the drum 1 and the sieve basket 2, where the suspension of the rotating vanes 4 which are fastened to the drum 1 on the jacket thereof, detected and is conveyed along the screen space in the axial direction to the reject outlet located at the other end.
  • the accepted material passes through the holes of the screen basket 2, is dammed up to a certain height and is drawn off radially through an accepted material outlet 17.
  • the rejects come out tangentially through a trough 12 from the sorter at the upper end.
  • the rotor consisting of the drum 1 equipped with the vanes 4 and 40 and the shaft 39 carrying it, is overhung in the lower part of the sorter housing 20 in bearings, not shown.
  • the drive takes place here, as shown, by means of belts 38 via drive pulleys 36 and 37, the pulley 36 on the shaft e.g. an electric motor (not shown here) can be attached.
  • the sorting wings 4 are wedge-shaped, with an upper wedge surface 10 and a lower wedge surface 9, between which, when the drum rotates, starting from the front edge 11 of the wing, a negative pressure builds up towards the end of the wing can.
  • vortices are created which, like the negative pressure generated by the wing when the wing passes the screen basket, detach the fiber mat attached to it from the screen and thereby prevent it from clogging.
  • the suspension is mixed again and again.
  • the sorting vanes 4 and the flights 140 are arranged approximately helically, but the sorting vanes 4 only to the extent that they do not lead directly to an excessive axial conveying component of the fiber suspension along the screen space 3 to the rejects outlet 12. Practically, this means that the vanes 4 are mutually offset in such a way that the lower wedge surfaces 9 also hit part of the suspension when the vanes rotate.
  • the lower wedge surface 9 of the 4 wings / twisted that is to say attached with increasing distance from the front edge 11 of the wing bent downward, ie that this surface 9 of the wings leads to a component of motion of the particles hitting them, which goes towards the sieve.
  • a different design of the lower wedge surfaces of the sorting vanes of at least a certain area of the surface of the rotor drum now prevents, in particular, a rapid passage of the suspension directly on the surface of the rotor drum, in particular the suspension enriched with rejects, and stagnation directly on the screen basket of the flow and possibly clogging with the associated poorer sorting effect.
  • the different areas f of which three are practically present can be seen on the jacket of the rotor drum 1.
  • the first area is the lowest and is equipped with sorting wings 4.
  • a region of the rotor drum is subsequently formed, in which also sorting wing, here designated 40, are arranged, but which, in relation to the other sorting wings 4 present in the lower drum area, can either have an inclination of the lower wedge surface 9 such that their conveying action against the direction of passage of the reject material for reject material discharge is less than in the other wings or, as can be seen from FIG. 1, this lower wedge surface 9, starting from the drum surface, is narrower than the upper wedge surface of the sorting wings 4 or 40.
  • these sorting wings 40 are designed differently from the others in that their lower wedge surface 9, like the upper (10), is also non-twisted.
  • the third area of the rotor drum is now smooth, i.e. designed essentially without sorting wings 4 or 40 and is predominantly above the screening zone, i.e. of the sieve chamber 3. This is a necessary measure to enable the necessary thickening of the rejects here (indicated at 15). In this way, reject consistencies of 20 to 25% and more are achieved at the reject outlet. For better discharge, the rotor drum has scraper blades 45 at its upper end.
  • Spray bores 8 which are arranged in the vicinity of this smooth drum area, are practically still below the highest edge of the last of the sorting vanes 40. This prevents excessive dilution of the rejects and also increases the friction of the rejects.
  • the remaining spray bores for dilution water 8 are located in a central area of the rotor drum, which is opposite the screen basket 2 without sorting holes or slots. This ensures that good sieve clearance is achieved by diluting the suspension with relatively little spray water. It is also advisable to design the area of the strainer basket 2 below these spray bores with a relatively large perforation, for example 6 mm in diameter, compared to the upper area with a diameter of approximately 4 mm.
  • the spray water is supplied via the connection head 14 into the cavity 44 of the at least partially provided double jacket of the rotor drum. A bearing 46 and a seal 47 are also provided there.
  • the inclination of the upper wedge surfaces 10 of the sorting vanes will be carried out at approximately 10 °, the inclination of the lower wedge surface 9, on the other hand, only at approximately 5 ° and with an even weaker inclination in certain circumstances with regard to the sorting vanes 40 adjacent to the smooth region 30 of the rotor drum, if one not narrower.
  • the width difference between the upper and the lower wedge surface of the sorting wings 40 will then be chosen to be at most approximately half the width of the screen space 3. It can e.g. be about 20 mm if the screen space is about 50 mm wide.
  • baffle bars 28 running approximately parallel to the drum axis of rotation on the inside of the sieve basket. Only about four pieces are required. In this way a better separation effect is achieved.
  • the rotor or the screen space 3 is formed with three zones in this embodiment.
  • the drum In the lowermost zone, the drum carries the sorting vanes 4.
  • the drum In an adjoining zone, the drum carries vanes 5, which mainly hold the spit to serve material transport against the exit end of the sorter, and in the third zone 30 the rotor 1 is smooth, that is to say without projections and the like. In this part, the sorting residue is to be stowed, so that it does not pass through the rotor too quickly with too little separation effect of the accepted material.
  • This above-described open (unpressurized) sorting type is particularly suitable as a final stage sorter for the various sorting residues, including waste paper, collected in a paper mill, a high consistency of rejects being achievable in particular with the embodiment according to FIG. 1.
  • the partition 19 between the upper and lower surfaces of the wings 4 contributes to the stiffening of the wings, so that the wall thickness of the same can be chosen to be smaller.
  • the screen space 3 can be made relatively narrow, so that a relatively low delivery rate is required.
  • a narrow annular sieve space 3 is also inexpensive because essentially the sorting takes place only in the immediate vicinity of the sieve and therefore an unnecessarily large sieve space, ie with a large radial extension, can only be disadvantageous.
  • de-stripping can be brought about by strips running essentially vertically and fastened to the inside wall of the screen in that the wings passing close to the screen (or the bars) shred the specks located in the fiber suspension.
  • the wings 4 will be arranged in principle, but particularly in the case of the sorters in an open design, so that when the drum rotates, the wings cover the entire height range of the first zone of the screening area provided with the sorter wings 4; however, these can also be provided in a denser drum arrangement.
  • wing 4 in which a partial axial section through the drum is shown with another embodiment of the wing 4, it can be seen that in this case the upper wedge surface 10 and the lower wedge surface 9 of the wing opposite to the previously described example of the Wing leading edge 11 starting increasingly against the horizontal, specifically inclined in the radial direction, ie are twisted in such a way that they produce a conveying component of the fiber suspension away from the sieve.
  • the effect that leads to the detachment of the fiber suspension from the sieve is, of course, brought about to an increased extent, so that this wing configuration is first of all with closed types of the sorter, i.e. pressure sorters with in particular from the inside out, i.e.
  • the drum will then be run without zoning, i.e. similar to the exemplary embodiment according to FIG. 2.
  • the conveying capacity for the material through the sorter in these so-called pressure sorters is mainly applied by the conveying pump for the fiber suspension.
  • the closed design is obtained from the embodiment according to FIG. 2 by closing the housing with a base plate and additionally arranging a nozzle in the lower part of the housing corresponding to the nozzle 17 provided for the waste material outlet.
  • FIG. 2 shows a rotary sorter designed in an open design, in which the drum 1 or the screen space 3 is likewise not divided into zones, but in which the drum carries the sorting vanes 4 continuously.
  • spray water is supplied through spray water bores via a spray head 14, as in the exemplary embodiment according to FIG. 1.
  • the inlet for the fiber suspension is in this case at the top of the nozzle 6 and the accept outlet at the bottom of the nozzle 17, that is to say the transport of the fiber suspension, in particular of the rejects, through the sorter in the axial direction from top to bottom, so that gravity runs through it the heavy rejects favored.
  • the sorter in the sense of FIG.
  • the 3 can be designed with a baffle wall 23 which arises from the fact that the lower part 1 a of the drum is designed with a larger diameter than the upper part 1b of the drum.
  • An overflow is also provided for the upper drum part 1b, in that the cleaned suspension is dammed up by a baffle 22.
  • the accepted substance then emerges through a nozzle 18 behind the first zone.
  • it can also or additionally, as already explained in relation to FIG. 1, make a mutual offset of the sorting vanes in such a way that the upper wedge surfaces thereof hit the fibrous stock suspension to a great extent and thus continuously impart a movement component to the particles in the direction of the inflow.
  • the inclination of the upper wedge surfaces can be chosen to be relatively steep, steeper than that of the lower ones, because the influence of gravity also contributes to the promotion of the fiber suspension by the sorter.
  • Another embodiment is also possible as a pressure sorter (in a closed construction), but with the sorting of the accepted material (fibers) taking place radially inwards into the sieve space 3 and the corresponding feeding of the fibrous material suspension from the outside radially outside the sieve basket.
  • the wings according to Fig. 7a and 7b or 7c are carried out so that the wall 19, which extends between the upper 10 and lower wedge surface 9, is arranged so that the free space between said surfaces to S i EBS palt out from the front edge 11 to the rear end of the S ortierhoffl 4 steadily decreased so that in front of the flights l n up and down and in particular the side next to the wings pressure builds up and thus at the chosen flow direction of the fibers ( see arrows) pulsating through the strainer basket 2, a detachment of the solid particles collecting and accumulating thereon and thus keeping the strainer basket free.
  • FIG. 7b is particularly suitable, since here the comparatively largest lateral surface, ie the surface of the lateral boundary wall 19, that generates the pressure pulses on the screen basket is present ; but the embodiment with untwisted wedge surfaces according to FIG. 7c can also be used well.
  • the twisting according to FIG. 1 a is also possible here, but certainly not as good as according to FIG. 7 b.
  • D a pressure sorter longer be used for the fine screening, and are generally disposed in front of the headbox of the paper machine, one seeks to achieve a narrow gap as possible at the trailing end of the sort wing "a" in Fig. 7a, of about 0, 5 mm exceed should . He is, however, dependent on the Y ou bl ochweite, hence the "fineness" of the screening stage, d. h . on the other hand also the fiber suspension itself.
  • the inclination of the boundary wall 19 in relation to the circumference of the screen basket will be chosen to be approximately 10 °.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Filtration Of Liquid (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Unwinding Webs (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)
EP81101042A 1980-02-21 1981-02-14 Dispositif de triage rotatif Expired EP0034780B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81101042T ATE24218T1 (de) 1980-02-21 1981-02-14 Rotationssortierer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3006482 1980-02-21
DE3006482A DE3006482C2 (de) 1980-02-21 1980-02-21 Rotationssortierer

Publications (3)

Publication Number Publication Date
EP0034780A2 true EP0034780A2 (fr) 1981-09-02
EP0034780A3 EP0034780A3 (en) 1984-05-02
EP0034780B1 EP0034780B1 (fr) 1986-12-10

Family

ID=6095183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81101042A Expired EP0034780B1 (fr) 1980-02-21 1981-02-14 Dispositif de triage rotatif

Country Status (8)

Country Link
US (1) US4356085A (fr)
EP (1) EP0034780B1 (fr)
JP (1) JPS56133009A (fr)
AT (1) ATE24218T1 (fr)
BR (1) BR6100221U (fr)
CA (1) CA1174203A (fr)
DE (2) DE3006482C2 (fr)
ES (1) ES499618A0 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8600169A (nl) * 1985-01-31 1986-08-18 Voith Gmbh J M Sorteerinrichting, in het bijzonder verticale zeefinrichting.
FR2578177A1 (fr) * 1985-03-04 1986-09-05 Kamyr Ab Dispositif de criblage.
EP0275921A3 (en) * 1987-01-22 1989-02-22 J.M. Voith Gmbh Cleaning foil
FR2636987A1 (fr) * 1988-09-19 1990-03-30 Voith Gmbh Dispositif de triage pour suspensions de fibres dans la fabrication du papier
FR2666598A1 (fr) * 1990-09-10 1992-03-13 Escher Wyss Gmbh Procede de separation, notamment de tri ou de fractionnement d'une suspension de pate a papier.
EP2910355A1 (fr) * 2014-02-21 2015-08-26 STF Maschinen- & Anlagenbau GmbH Dispositif de lavage de matière en vrac
EP2943292A1 (fr) * 2013-01-10 2015-11-18 Günther Holding GmbH & Co. KG Élément de tri pour un dispositif de tri

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Publication number Priority date Publication date Assignee Title
EP0205623B1 (fr) * 1984-12-25 1989-09-13 Mitsubishi Jukogyo Kabushiki Kaisha Ecran a fentes a pression
DE3701400A1 (de) * 1986-02-18 1987-10-08 Voith Gmbh J M Sortiereinrichtung fuer fasersuspensionen
DE3703831A1 (de) * 1987-02-07 1988-09-08 Voith Gmbh J M Spuckstoffsortierer
FI77279C (fi) * 1987-04-30 1989-02-10 Ahlstroem Oy Foerfarande och anordning foer behandling av fibersuspension.
US5078878A (en) * 1988-03-07 1992-01-07 Bird Escher Wyss Pressure knotter screening apparatus
US5172813A (en) * 1989-05-17 1992-12-22 A. Ahlstrom Corporation Method and an apparatus for treating fiber suspension
DE3935151C2 (de) * 1989-10-21 1998-09-17 Voith Gmbh J M Rotor für einen Sortierer zur Wiedergewinnung von Fasern aus Papier oder Zellstoff
JPH0748715Y2 (ja) * 1989-12-08 1995-11-08 株式会社サトミ製作所 紙料精選装置
DE4000248A1 (de) * 1990-01-06 1991-07-11 Emil Holz Rotor fuer drucksortierer zum sortieren von fasersuspensionen
US5103842A (en) * 1990-08-14 1992-04-14 Philip Morris Incorporated Conditioning cylinder with flights, backmixing baffles, conditioning nozzles and air recirculation
US5143220A (en) * 1990-11-08 1992-09-01 Ingersoll-Rand Company Apparatus for screening to remove knots from a fluid borne slurry of fibers and knots
FI88414C (fi) * 1991-01-30 1993-05-10 Ahlstroem Oy Anordning foer behandling av fibersuspension
DE4123112A1 (de) * 1991-07-12 1993-01-21 Voith Gmbh J M Drucksortierer
US5190160A (en) * 1991-08-02 1993-03-02 Ingersoll-Rand Company Method and apparatus for enhancing transport of knots in a knot drainer
FI92227C (fi) * 1992-04-23 1994-10-10 Ahlstroem Oy Laite kuitususpension käsittelemiseksi
US5497886A (en) * 1992-07-13 1996-03-12 Ingersoll-Rand Company Screening apparatus for papermaking pulp
US5307939A (en) * 1992-07-13 1994-05-03 Ingersoll-Rand Company Screening apparatus for papermaking pulp
NL1009609C2 (nl) * 1998-07-10 2000-01-11 Constructie En Systeembouw Ver Inrichting voor het scheiden van vaste deeltjes uit een in hoofdzaak uit vloeistof bestaande substantie.
DE19911884A1 (de) * 1999-03-17 2000-09-21 Voith Sulzer Papiertech Patent Drucksortierer zum Sieben einer Papierfaserstoffsuspension und Siebräumer für einen solchen
US20050045529A1 (en) * 2003-09-02 2005-03-03 Gl&V Management Hungary Kft Vortex inducing rotor for screening apparatus for papermaking pulp
KR101300049B1 (ko) * 2011-10-27 2013-09-10 심관흠 탈수장치
GB2600430A (en) * 2018-08-01 2022-05-04 Salvtech Ltd Dry separation waste processing and apparatus for achieving such
US12139852B2 (en) 2020-02-14 2024-11-12 Taizen Co., Ltd. Wet pulp material processing machine
CN113245197A (zh) * 2021-05-20 2021-08-13 福建师范大学 一种生物反应和生物分离装置
DE102023134178A1 (de) * 2023-12-06 2025-06-12 Andritz Fiedler Gmbh Sortierer und adapter hierfür

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US3363759A (en) * 1964-04-29 1968-01-16 Bird Machine Co Screening apparatus with rotary pulsing member
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SE316363B (fr) * 1966-12-01 1969-10-20 Karlstad Mekaniska Ab
CA1009583A (en) * 1973-03-23 1977-05-03 Sydney W.H. Hooper Two stage pressure pulp screen device with stationary cylindrical screen
AT336392B (de) * 1974-03-20 1977-05-10 Finckh Metalltuch Maschf Drucksichter fur faserstoffsuspensionen
US4165841A (en) * 1975-10-30 1979-08-28 J. M. Voith Gmbh Apparatus for separating contaminants from fibrous suspensions
DE2712715B2 (de) * 1977-03-23 1979-05-23 Hermann Finckh Maschinenfabrik Gmbh & Co, 7417 Pfullingen Sortierer für Fasersuspensionen
DE2712749A1 (de) * 1977-03-23 1979-02-08 Finckh Maschf Sortierer zum sichten von fasersuspensionen
FR2410081A1 (fr) * 1977-11-23 1979-06-22 Lamort Ingenieurs Construc E E Appareil pour l'epuration des pates a papier
DE2850385C2 (de) * 1978-11-21 1981-02-05 J.M. Voith Gmbh, 7920 Heidenheim Vorrichtung zum Ausscheiden von Verunreinigungen aus Faserstoffsuspensionen
FR2461060A1 (fr) * 1979-07-06 1981-01-30 Lamort E & M Dispositif pour l'epuration et la recuperation de pate a papier

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8600169A (nl) * 1985-01-31 1986-08-18 Voith Gmbh J M Sorteerinrichting, in het bijzonder verticale zeefinrichting.
FR2578177A1 (fr) * 1985-03-04 1986-09-05 Kamyr Ab Dispositif de criblage.
EP0275921A3 (en) * 1987-01-22 1989-02-22 J.M. Voith Gmbh Cleaning foil
FR2636987A1 (fr) * 1988-09-19 1990-03-30 Voith Gmbh Dispositif de triage pour suspensions de fibres dans la fabrication du papier
FR2666598A1 (fr) * 1990-09-10 1992-03-13 Escher Wyss Gmbh Procede de separation, notamment de tri ou de fractionnement d'une suspension de pate a papier.
EP2943292A1 (fr) * 2013-01-10 2015-11-18 Günther Holding GmbH & Co. KG Élément de tri pour un dispositif de tri
US9895719B2 (en) 2013-01-10 2018-02-20 Günther Holding GmbH & Co. KG Sorting element for a sorting device
EP2910355A1 (fr) * 2014-02-21 2015-08-26 STF Maschinen- & Anlagenbau GmbH Dispositif de lavage de matière en vrac

Also Published As

Publication number Publication date
BR6100221U (pt) 1983-05-17
CA1174203A (fr) 1984-09-11
EP0034780B1 (fr) 1986-12-10
DE3175705D1 (en) 1987-01-22
US4356085A (en) 1982-10-26
ES8206707A1 (es) 1982-08-16
EP0034780A3 (en) 1984-05-02
JPH0242951B2 (fr) 1990-09-26
DE3006482A1 (de) 1981-10-08
JPS56133009A (en) 1981-10-17
ATE24218T1 (de) 1986-12-15
DE3006482C2 (de) 1983-04-14
ES499618A0 (es) 1982-08-16

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