EP0764736B1 - Pale pour des dispositifs de tamisage - Google Patents

Pale pour des dispositifs de tamisage Download PDF

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Publication number
EP0764736B1
EP0764736B1 EP96115317A EP96115317A EP0764736B1 EP 0764736 B1 EP0764736 B1 EP 0764736B1 EP 96115317 A EP96115317 A EP 96115317A EP 96115317 A EP96115317 A EP 96115317A EP 0764736 B1 EP0764736 B1 EP 0764736B1
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EP
European Patent Office
Prior art keywords
vane
wing
base body
section
screen
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
EP96115317A
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German (de)
English (en)
Other versions
EP0764736A2 (fr
EP0764736A3 (fr
Inventor
Norbert Einöder
Hubert Gassmann
Frank c/o Heinrich Fiedler GmbH & Co.KG Lotter
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.)
Andritz Fiedler GmbH
Original Assignee
Fiedler Heinrich GmbH and Co KG
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
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Application filed by Fiedler Heinrich GmbH and Co KG filed Critical Fiedler Heinrich GmbH and Co KG
Publication of EP0764736A2 publication Critical patent/EP0764736A2/fr
Publication of EP0764736A3 publication Critical patent/EP0764736A3/fr
Application granted granted Critical
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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 wing and an arrangement of several wings for sorting devices, in particular are intended for fiber suspensions in paper pulping.
  • the invention relates to preferred wing shapes.
  • a wing or a Sorting wing of a sorter with a drum-like body known.
  • the wing points in the direction of rotation ever increasing cross section and ends in one steep edge, and this is included in the direction of rotation Extension with a decreasing cross-section with a Fillet.
  • the area with increasing cross section forms in Interaction with a surrounding the drum-like body Sieve wall a suction zone, and the area with decreasing Cross section forms in cooperation with the screen wall Pressure zone.
  • the outer contour of the wing includes a steep one falling edge at the transition between the area with increasing Cross section and the area with decreasing cross section.
  • WO90 / 05807 and US-A-2 835 173 are sorting devices known, which have a rotor that on its outer circumference Cleaning elements or sorting elements is occupied.
  • the above installation of the same can also be fiber bundles and braids as well as dead zones and spinning due to the Form the disruptive effect of the cleaning elements in the material flow area.
  • the Annular gap between the screen wall and the rotor base body due to the projecting height of the cleaning elements or Driving elements narrowed. If between the highest point of the Cleaning element and the sieve wall surface only a small one If there is a distance, the goods to be treated can be on this very narrowed, annular gap a very strong Experience thickening. This leads to malfunctions of the Sorter. However, if you arrange such a rotor at a greater distance from the screen wall, so you have to Increase the speed of the rotor, reducing the energy consumption of the Sorting device becomes larger.
  • the invention aims to achieve the one outlined above Need to take into account and especially while overcoming of the difficulties described above wings for sorting devices to provide, especially for fiber suspensions are determined when digesting paper and which in supportive An efficient and reliable manner high quality sorting with an energy saving Allow operation.
  • a wing for sorting device especially for fiber suspensions in paper pulping, provided which faces such a screen wall Outside contour has that in cooperation with the screen wall in Flow direction a suction zone section with increasing Wing width and a pressure zone section with decreasing Wing width forms, whereby the total length of the wing the length of the suction zone section and the length of the pressure zone section composed.
  • the wing according to the invention thus has to face the screen Outside contour profiling without edges, breaks or Fillets, but with both the section of the wing increasing wing width as well as the section of the wing decreasing wing width and also the transition area a steady course. This is also in the area of the pressure zone section a steady increase in pressure due to the steady course available, which ensures gentle transport of material to the perforations the screen wall takes place. This prevents Contamination in the pressure zone section due to the perforations the screen wall to be pressed. So you get an improved one Sorting quality. At the same time, you also get the necessary ones Turbulence to keep and clean the perforations as well sufficient fluidization of the goods to be sorted due to the change in sash width in the suction zone section.
  • the sorting device especially suitable for sorting tasks in High consistency area, as well as for sorting tasks with quite coarse impurities, since the sorting quality can significantly improve.
  • the total length Fl des are further influencing variables Wing, based on the inside diameter of the screen, as well as the largest Wing width Fb to mention.
  • the total length Fl based on the Sieve inner diameter Di, is about the order of 0.05 to 0.3 x Di, preferably from 0.08 to 0.2 x Di.
  • the order of magnitude for the influencing variables of the wing in the Suction zone section has such a sufficient length that reliable cleaning of the perforations of the screen wall is guaranteed. If the suction zone section is too short, the current breaks off too soon and turbulence occurs, which affect the cleaning effect.
  • the smallest distance s between the Outer contour of the wing and the sieve wall about 0.5 to 10 mm, preferably 1.5 to 6 mm.
  • Such a distance is essential smaller than with conventional designs of such sorters, so that you can get very high quality sorting results without Can cause malfunctions.
  • the rotor speed can also be changed lower because the wings are reduced due to the Distance very effectively with regard to the fabric flow area the cleaning and fabric management act.
  • the sorting device works, it can be turned away from the screen Page designed so that they are essentially with the shape of the screen-facing outer contour according to the the above explanations. You then get one symmetrical design of the wing.
  • the screen facing away Side of the wing deviates from the screen facing Be designed outer contour.
  • the one facing away from the screen Side be formed as a straight section.
  • the wing is aerodynamically profiled. This can reduce the wing's inherent flow resistance and the energy consumption can continue to reduce. This also allows interference flows in the Suppress fabric flow area to reduce the fabric flow both on the Favor cleaning side as well as on the fabric feed side.
  • the wing can be designed in several parts. If he Wing is designed in one piece or in several parts, depends on essentially on the size of the wing and its function and arrangement, for example on a base body.
  • the section with increasing wing width and the section with decreasing wing width in the fabric flow direction or point against it are independent of the relative direction of movement between screen wall and wing with the wing according to the invention, the desired effects generate on the fabric flow.
  • the wing can for example directly on the outer circumference of a base body, such as a basic rotor body, preferably essentially one cylindrical or conical rotor body, attached or be formed in one piece with the base body, or optionally attached to the base body by means of a support arm his. If the wing on the outer circumference of the main body attached and fastened there, so the attachment by welding or soldering, or it can be screwed on become. If the wing or wings directly on the Mounted on the outer circumference of the basic rotor body and fastened there there are no protruding internals, so that dead zones, Avoid spinning, braid formation or the like.
  • the wing can face the generatrix of the base body be arranged inclined. This can create transition areas between individual sorting levels.
  • this can opposite the tangent to the base body at an angle be employed, which is up to 10 °, or preferably up to 4 °, can be.
  • an arrangement is specified according to the invention, which comprises several wings, which is characterized in that the Wing in different basic body axial planes in the circumferential direction are staggered.
  • the invention relates to the design and Profiling of wings in sorting devices for fiber suspensions, especially for pulping paper, which such are optimized and chosen so that you have a streamlined Profiling the outer contour of the wing or wings without sharp Edges. This reduces the inherent resistance, and you get a significant energy saving. Further can through the section with ever increasing wing width and the section with continuously decreasing wing width, whereby both sections also merge continuously, on the one hand a suction zone in cooperation with the screen wall facing are formed, which for effective sieve cleaning provides sufficient suction, and on the other hand a Pressure zone are formed, which is a gentle material transport to the perforations of the screen wall without a sudden increase in pressure allowed. This makes the sorting quality essential improve.
  • the wing 5 has an overall outer contour 6, which the Screen wall 2a facing, which has such a course, that in cooperation with the sieve wall 2a in the material flow direction (see arrow in Figures 1 and 2) a suction zone section C with increasing wing width and a pressure zone section D with decreasing wing width is formed.
  • the suction zone itself is with P- and the pressure zone with P +.
  • the wing 5 has one Total wing length Fl, which is equal to the sum of the length L1 of the Suction zone section C and the length L2 of the pressure zone section D is.
  • the length L1 of the pressure zone section D is 0.1 to 0.45 x Fl (total wing length) and preferably to 0.3 x Fl.
  • the largest wing width is designated with Fb. This will be between the side of wing 5 facing away from the screen and the highest point measured on the outer contour 6 of the wing 5.
  • the leading end of the wing 5 is preferably one immediately adjacent circular section formed or runs out with a radius R3, which is in a range of 3 to 25 mm, in particular from 6 to 20 mm.
  • the outer contour 6 of the wing 5 in the suction zone section C is preferably formed by a segment of a circle, which one Has radius R1.
  • At the beginning of Suction zone section C, that is, at the trailing end of the Outer contour 6 may have a radius R4 which is in one Range of 1 to 5 mm, preferably in a range of 1.5 to 3 mm.
  • the smallest distance between the screen wall 2a and the outer contour 6 is denoted by s.
  • This distance s can be in a range from 0.5 to 10 mm, preferably from about 1.5 to about 6 mm lie.
  • an angle of attack FW can be arranged, which in one area of up to 10 °, preferably up to 4 °.
  • a base body for example a rotor base body (see reference number 1 in Figure 2) then employed including the angle of attack FW.
  • the wing 5 which is also referred to as a hydrofoil, enables interaction with perforations 3 in the sieve 2 regardless of the profiling of the perforations on the manner described in more detail below.
  • suction zone section C In the area of the suction zone P- (suction zone section C in the figures) turbulence in the area of the perforations 3 to keep clear and cleaning as well as for feeding the material through the perforations 3 generated. Due to the increasing wing width in the suction zone section C is a gentle mass transfer to the in Perforation nearest fabric flow direction 3. Starting from the Place with the largest wing width is then also a constant pressure build-up in the pressure zone section D, so that in more efficiently in the pressure zone P + the fabric through the Perforations 3 is promoted.
  • the sorting quality can be improved since for example, preventing contamination by a sudden pressure increase through the perforations 3 pressed become.
  • the more efficient mode of action achieved by the Profiling of the wing 5 according to the type described above and the streamlined profile of the outer contour 6, can the energy consumption of the assigned sorting device decrease. Due to the streamlined profile of the Wing 5, the inherent resistance of the same can be reduced, and there are dead zones, spinning, braids and the like avoiding either a degradation of the efficiency of the sorting device or can even lead to malfunctions and the perforations 3 can clog.
  • the wing 5 allows a efficient sorting process with high quality results as well as an energy-saving, reliable operation an assigned sorting device.
  • FIG. 2 shows a preferred embodiment of a sorting device shown schematically and by way of example.
  • the sorting device has a rotor with a Rotor base body 1, which is, for example, corresponding to the Direction of material flow (see arrow) in Figure 2 clockwise rotates.
  • the basic rotor body 1 can be essentially cylindrical or be conical or frustoconical.
  • the Rotor base body 1 is surrounded by the screen 2, which the Sieve wall 2a forms which perforations 3, such as openings, Slots or the like.
  • perforations 3 such as openings, Slots or the like.
  • the profile geometry of the perforations 3 for example be chosen in the manner shown in US-A-5,073,254.
  • the grooves are curved in an arc and have a downstream flank with a stronger one Curvature as well as an upstream flank with weaker Curvature, with the flanks bump-free through an arc can be connected.
  • On an outer circumference 4 of the Rotor base body 1 are in the example shown, in Circumferentially spaced wings 5 placed and, as there shown, for example by means of welding or soldering the rotor base body 1 firmly connected.
  • wing 5 and Base body 1 can also be selected a screw connection, or if necessary, the wings 5 by means of support arms on Base body 1 be attached.
  • spacers such as shims or the like, in addition to Attachment of the wing 5 to the rotor base body 1 used be, if necessary, the smallest distance s between the Screen wall 2a and the outer contour 6 of the wing 5 to vary and to adjust to the size ranges mentioned above.
  • the base body 1 can with the fixed wings 5 are fixed at the sorting device, and the sieve 2 can move around the common central axis turn the arrangement of sieve 2 and base body 1.
  • each wing 5 on different axial planes of the Base body 1 is arranged.
  • Each wing 5 can for example inclined with respect to the generatrix of the base body 1 be arranged.
  • the wings 5 are preferably different Axial planes of the base body 1 offset relative to one another arranged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Holo Graphy (AREA)
  • Discharge Of Articles From Conveyors (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Claims (21)

  1. Ailette pour dispositifs de tamisage, en particulier pour des suspensions fibreuses pendant la préparation du papier, qui a un contour extérieur tourné vers un tamis tel qu'elle crée, avec le tamis, dans la direction de l'écoulement de matière, une section, côté d'aspiration, © à largeur d'ailette croissante et une section, côté de pression, (D) à largeur d'ailette décroissante, la longueur totale (FI) d'ailette (5) étant composée de la longueur de la zone, côté d'aspiration, © et la longueur (L1) de la zone, côté de pression, (D), et le contour extérieur (6) d'ailette (5) tourné vers le tamis ayant une allure continue de largeur d'ailette croissante et une largeur d'ailette décroissante ainsi que dans la zone de transition, caractérisée en ce que la longueur (L1) d'ailette (5) dans la zone, côté de pression, (D) vaut L1 = de 0,1 à 0,45 x FI (longueur totale d'ailette), la longueur, de préférence environ L1 = 0,3 x FI, en ce que l'ailette (5) a dans la zone, côté d'aspiration, © un rayon (R1), avec environ R1 = de 0,8 à 1,5 x FL, de préférence R1 = de 0,9 à 1,4 x FI, et en ce que la largeur maximale d'ailette (Fb) vaut environ Fb = de 0,15 à 0,35 x FI, de préférence Fb = de 0,2 à 0,27 x FI.
  2. Ailette suivant la revendication 1, caractérisée en ce que l'ailette (5), dans la zone, côté de pression, (D), a un rayon (R2) avec environ R2 = de 0,3 à 0,6 x FI, de préférence R2 = de 0,4 à 0,5 x FI.
  3. Ailette suivant la revendication 1 ou 2, caractérisée en ce que la longueur totale FI) d'ailette (5), par rapport au diamètre de l'intérieur du tamis (Di), est dans l'ordre de grandeur de FI = de 00,5 à 0,3 x Di, de préférence FI = de 0,08 à 0,2 x Di.
  4. Ailette suivant une des revendications précédentes, caractérisée en ce que la section d'ailette (5), à largeur d'ailette décroissante, se termine avec un rayon (R3) dans l'ordre de grandeur de 3 à 25 mm, de préférence de 6 à 20 mm.
  5. Ailette suivant une des revendications précédentes, caractérisée en ce que la section d'ailette (5), à largeur d'ailette croissante, commence avec un rayon dans l'ordre de grandeur de 1 à 5 mm, de préférence de 1,5 à 3 mm.
  6. Ailette suivant une des revendications précédentes, caractérisée en ce que la distance minimale (s), entre le contour extérieur (6) d'ailette (5) et le tamis (2a), vaut environ de 0,5 à 10 mm, de préférence de 1,5 à 6 mm.
  7. Ailette suivant une des revendications précédentes, caractérisée en ce que la face d'ailette (5), tournée vers le tamis, est en accord, pour l'essentiel, avec la forme du contour extérieur, tourné vers le tamis.
  8. Ailette suivant une des revendications 1 à 6, caractérisée en ce que le côté d'ailette (5), tourné vers le tamis, est décroissant à partir du contour extérieur (6), tourné vers le tamis.
  9. Ailette suivant une des revendications précédentes, caractérisée en ce qu'elle est profilée dans le sens du courant
  10. Ailette suivant une des revendications précédentes, caractérisée en ce qu'elle est étalée en plusieurs parties.
  11. Ailette suivant une des revendications précédentes, caractérisée en ce que la section ©, à largeur d'ailette croissante, et la section (D), à largeur d'ailette décroissante, indiquent la direction d'écoulement de matière ou à l'inverse de celle-ci.
  12. Ailette suivant une des revendications précédentes, caractérisée en ce qu'elle est fixée sur une circonférence extérieure d'un corps de base (1) ou formée d'une seule pièce avec le corps de base (1).
  13. Ailette suivant la revendication 12, caractérisée en ce le corps de base (1) est un corps de base de rotor, de préférence un corps, pour l'essentiel, cylindrique ou conique.
  14. Ailette suivant la revendication 12 ou 13, caractérisée en ce qu'elle est inclinée en face des génératrices du corps de base (1).
  15. Ailette suivant une des revendications 12 à 14, caractérisée en ce qu'elle est conçue, par rapport à la tangente du corps de base (1), avec un angle (FW) allant jusqu 'à 10°, de préférence jusqu'à 4°.
  16. Ailette suivant une des revendications précédentes, caractérisée en ce qu'elle est placée et fixée directement sur la circonférence extérieure (4) du corps de base (1).
  17. Ailette suivant la revendication 16, caractérisée en ce qu'elle est soudée ou brasée.
  18. Ailette suivant une des revendications 12 à 15, caractérisée en ce qu'elle est fixée au corps de base (1) au moyen d'un support.
  19. Ailette suivant une des revendications 12 à 18, caractérisée en ce qu'elle est vissée au corps de base (1) ou au moyen du support.
  20. Ailette suivant la revendication 19, caractérisée en ce que, pour faire varier la distances minimale (s), entre le contour extérieur (6) d'ailette (5) et le tamis (2a), sont prévues des pièces intercalaires, comme des tôles, des cales, etc.
  21. Arrangement, comprenant plusieurs ailettes suivant une des revendication 12 à 20, caractérisé en ce que les ailettes (5) sont disposées décalées dans des plans axiaux du corps de base, différents dans le sens de la circonférence.
EP96115317A 1995-09-25 1996-09-24 Pale pour des dispositifs de tamisage Expired - Lifetime EP0764736B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29515338U 1995-09-25
DE29515338U DE29515338U1 (de) 1995-09-25 1995-09-25 Flügel für Sortiervorrichtungen

Publications (3)

Publication Number Publication Date
EP0764736A2 EP0764736A2 (fr) 1997-03-26
EP0764736A3 EP0764736A3 (fr) 1997-07-02
EP0764736B1 true EP0764736B1 (fr) 2002-03-06

Family

ID=8013433

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96115317A Expired - Lifetime EP0764736B1 (fr) 1995-09-25 1996-09-24 Pale pour des dispositifs de tamisage

Country Status (5)

Country Link
EP (1) EP0764736B1 (fr)
AT (1) ATE214114T1 (fr)
CA (1) CA2186328C (fr)
DE (2) DE29515338U1 (fr)
ES (1) ES2173233T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008119880A1 (fr) 2007-03-30 2008-10-09 Advanced Fiber Technologies (Aft) Oy Elément de rotor et rotor pour un appareil de criblage
DE102009014810A1 (de) 2009-03-25 2010-09-30 Andritz Fiedler Gmbh Flügel für Sortiervorrichtungen
US10617979B2 (en) 2012-05-25 2020-04-14 Aikawa Fiber Technologies Trust Rotor element and a rotor for a screening apparatus

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29515338U1 (de) * 1995-09-25 1995-11-23 Heinrich Fiedler GmbH & Co. KG, 93057 Regensburg Flügel für Sortiervorrichtungen
FI102980B1 (fi) * 1997-05-21 1999-03-31 Valmet Corp Siipisovitelma kuitumassan lajittelulaitetta varten
FI4401U1 (fi) † 1999-11-29 2000-04-27 Ahlstrom Machinery Oy Järjestely massan lajittelemiseksi
FI118478B (fi) 2006-02-10 2007-11-30 Metso Paper Inc Lajittimen siipi ja lajitin kuitumassan lajittelemiseksi
FI120913B (fi) † 2007-09-28 2010-04-30 Andritz Oy Laite massan lajittelemiseksi
FI121672B (fi) 2008-10-15 2011-02-28 Advanced Fiber Tech Aft Trust Menetelmä lajitinlaitteen roottorin valmistamiseksi ja roottori
CN115198553B (zh) * 2021-04-12 2025-08-22 安德里茨（中国）有限公司 浆料筛选转子及浆料筛选设备

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Publication number Priority date Publication date Assignee Title
DE495284C (de) * 1925-05-23 1930-04-04 Samuel Milne Verfahren und Einrichtung zum Sichten von Papierstoff u. dgl.
US2835173A (en) * 1955-03-03 1958-05-20 Black Clawson Co Paper machinery
DE1250726B (de) * 1963-05-17 1967-09-21 Canadian Ingersoll-Rand Company Limited, Montreal, Quebec (Kana da), Bird Machine Company, South Walpole, Mass (V St A) Reinigungsvorrichtung fur Trommelsiebe
DE1761853A1 (de) * 1968-07-15 1971-09-02 Feldmuehle Ag Verfahren zum Herstellen flaechiger Vliesstoffe
DE2830386C2 (de) * 1978-07-11 1982-09-02 Hermann Finckh, Maschinenfabrik GmbH & Co, 7417 Pfullingen Verfahren zum Sortieren von Fasersuspensionen sowie Drucksortierer zur Durchführung des Verfahrens
DE3010952A1 (de) * 1980-03-21 1981-10-08 J.M. Voith Gmbh, 7920 Heidenheim Scheibensortierer zum reinigen von faserstoffsuspensionen
DE3607457A1 (de) * 1986-03-07 1987-09-10 Voith Gmbh J M Sortiersieb
DE4000248A1 (de) * 1990-01-06 1991-07-11 Emil Holz Rotor fuer drucksortierer zum sortieren von fasersuspensionen
US5072834A (en) * 1990-11-19 1991-12-17 The Black Clawson Company Screening apparatus for paper making stock
US5282579A (en) * 1993-01-25 1994-02-01 Poser Kimberly J Apparatus for adjusting the gap of a size reduction machine
JP3065202B2 (ja) * 1993-10-20 2000-07-17 石川島播磨重工業株式会社 古紙パルプの選別方法および装置
DE29515338U1 (de) * 1995-09-25 1995-11-23 Heinrich Fiedler GmbH & Co. KG, 93057 Regensburg Flügel für Sortiervorrichtungen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008119880A1 (fr) 2007-03-30 2008-10-09 Advanced Fiber Technologies (Aft) Oy Elément de rotor et rotor pour un appareil de criblage
DE102009014810A1 (de) 2009-03-25 2010-09-30 Andritz Fiedler Gmbh Flügel für Sortiervorrichtungen
US10617979B2 (en) 2012-05-25 2020-04-14 Aikawa Fiber Technologies Trust Rotor element and a rotor for a screening apparatus
US11135532B2 (en) 2012-05-25 2021-10-05 Aikawa Fiber Technologies Inc. Rotor element and a rotor for a screening apparatus

Also Published As

Publication number Publication date
CA2186328A1 (fr) 1997-03-26
DE59608825D1 (de) 2002-04-11
EP0764736A2 (fr) 1997-03-26
ATE214114T1 (de) 2002-03-15
ES2173233T3 (es) 2002-10-16
CA2186328C (fr) 2008-02-12
EP0764736A3 (fr) 1997-07-02
DE29515338U1 (de) 1995-11-23

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