EP0707109A1 - Straining screen, in particular for paper pulp - Google Patents
Straining screen, in particular for paper pulp Download PDFInfo
- Publication number
- EP0707109A1 EP0707109A1 EP95402233A EP95402233A EP0707109A1 EP 0707109 A1 EP0707109 A1 EP 0707109A1 EP 95402233 A EP95402233 A EP 95402233A EP 95402233 A EP95402233 A EP 95402233A EP 0707109 A1 EP0707109 A1 EP 0707109A1
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- European Patent Office
- Prior art keywords
- circles
- screen according
- stack
- tie rods
- ring
- 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.)
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- 229920001131 Pulp (paper) Polymers 0.000 title abstract description 3
- 230000000694 effects Effects 0.000 description 5
- 238000003466 welding Methods 0.000 description 4
- 239000011888 foil Substances 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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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
- D21D5/16—Cylinders and plates for screens
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
Definitions
- the present invention relates to a screen consisting of a stack of circular elements stacked on top of each other and held together by a plurality of tie rods parallel to the generatrices of the cylinder, in which each circular element is constituted by a U-profile bent so as to constitute a circle.
- the circular elements are made from U-shaped elements, there will occur, under the effect of the traction exerted by the tie rods, on the one hand a slight bending of the two branches of the U, which slightly approach the one of the other; on the other hand a slight deformation of the base of the U which bulges very slightly.
- a stack is thus obtained having sufficient elasticity to withstand the pressure variations caused by the foil, and to allow the pre-tensioning effect which is given by the tie rods to be determined at will.
- the tie rods are associated with two upper and lower rings to form a rigid cylindrical frame on which the U-shaped circles are threaded; the pre-tensioning of said circles being carried out by tightening on the stack of an additional crown.
- Figures 1 and 2 show a known type of sieve, as described in patent No. 88.10863 of 12/08/1988.
- the U-profile thus prepared is then bent, after which either it is wound in a spiral or else it is cut into pieces of the same length so as to form circles which are stacked on top of each other.
- the U-shaped profile is arranged so that the two side walls of the U are facing towards the 'outside.
- centripetal regime that is to say when the material to be filtered circulates from the outside to the inside
- circles of the same diameter are produced with the U-shaped profile. For that or else bend the U-shaped section so as to obtain several windings, then cut sections which make it possible to form circles with the desired diameter; or else cut the U-shaped section into sections of the same length and bend them so as to form a circle.
- a circle 1 is obtained in which the side walls of the U are turned inwards, as shown in FIG. 3 or else a circle 1 ′ in which the side walls of the U are turned outward, as shown in Figure 6.
- crown 2 at the base of the stack and another crown 3 at the top.
- tie rods 4 are threaded at their two ends so as to be able to receive nuts 6 which allow a sufficiently large tightening to be achieved so that the circles are held without play against one another in operation.
- each tie rod 4 is screwed into the lower ring 2 and is provided with a nut 6 on its upper part; but it is possible to put a nut 6 at each end, the two crowns 2 and 3 then being identical.
- FIGS. 3 and 4 which represent a sieve which must operate in centripetal regime, it is preferable that there are as few obstacles as possible on the outside surface of the screen: the tie rods 4 are then placed inside the screen.
- the tie rods are used, not to clamp the Us against each other but to constitute, in cooperation with two crowns, a rigid cylindrical framework on which the Us are threaded. one after the other.
- the elastic tightening with pre-tensioning of the Us is then carried out by means of an additional crown, known as a clamping crown which is precisely screwed onto said rigid framework.
- the rigid cylindrical framework is produced by bars 14 which are, by means of screws 15 fixed securely to an upper ring 10 and a lower ring 12.
- the two rings 10-12 and the bars 14 form a kind of solid cage.
- the ends 14a and 14b of the bars 14 are fitted into corresponding housings formed in the crowns 10 and 12.
- a crown 13 is then placed on the U-shaped circle which is the first of the stack and this crown 13 is tightened by a plurality of screws 17 on the upper crown 10.
- the lower face 13a of the crown 13 thus exerts a clamping pressure on the stack of circles 11.
- one or more shims 16 are placed between the lower face 13a of the tightening ring 13 and the first circle 11.
- the clamping ring 13 and the upper ring shims 18 are between the clamping ring 13 and the upper ring shims 18 in the form of washers.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
Description
Dans le brevet EP 0 354 846 déposé le 9/08/1989, on a décrit un épurateur et classificateur de pâte à papier caractérisé par la juxtaposition d'éléments à section transversale en U comportant un fond plat muni de perforations et deux parois latérales. Selon un premier mode de réalisation on réalise des cercles disposés les uns sur les autres; selon un deuxième mode de réalisation on enroule le profilé en U sur lui-même en spirale.In patent EP 0 354 846 filed on August 9, 1989, a pulp purifier and classifier has been described, characterized by the juxtaposition of elements with a U-shaped cross section comprising a flat bottom provided with perforations and two lateral walls. According to a first embodiment, circles arranged on top of each other are produced; according to a second embodiment, the U-shaped profile is wound on itself in a spiral.
Dans les deux cas il est nécessaire de souder les unes aux autres les extrémités des parois latérales du U afin d'éviter que, sous l'effet de la pression, ils ne se séparent, même très légèrement, les uns des autres.In both cases it is necessary to weld the ends of the side walls of the U to each other in order to avoid that, under the effect of the pressure, they do not separate, even very slightly, from each other.
Lorsque le tamis doit fonctionner en régime centrifuge, les parois latérales du U enroulé en spirale, sont tournées vers l'extérieur ; de sorte qu'il est possible de les souder entre elles. Par contre, lorsque le tamis doit fonctionner en régime centripète, les parois latérales du U, enroulé en spirale, sont tournées vers l'intérieur et il est alors très difficile de procéder à des soudures à l'intérieur du cylindre ainsi réalisé.When the sieve is to operate in centrifugal mode, the side walls of the U wound in a spiral, are turned outwards; so that it is possible to weld them together. On the other hand, when the sieve has to operate in centripetal regime, the side walls of the U, wound in a spiral, are turned inwards and it is then very difficult to weld inside the cylinder thus produced.
En outre, la mise en place d'une soudure sur tout le trajet en spirale et une opération onéreuse.In addition, the establishment of a weld over the entire spiral path and an expensive operation.
Or, il est indispensable de prévoir une fixation : pour éviter le déplacement partiel du U sous l'effet de l'organe mobile (couramment appelé "foil") qui défile le long de la paroi du tamis afin de provoquer des variations de pression; pour assurer un parfait parallélisme entre les deux faces du tamis; pour obtenir une bonne rigidité du tamis dans le sens transversal.However, it is essential to provide a fixing: to avoid partial displacement of the U under the effect of the movable member (commonly called "foil") which runs along the wall of the screen in order to cause pressure variations; to ensure perfect parallelism between the two faces of the screen; to obtain a good rigidity of the sieve in the transverse direction.
Dans la demande de brevet WO90/12147 on a décrit un tamis constitué par un empilage d'éléments cylindriques en matière céramique entre lesquels sont interposés des couronnes intercalaires, cet empilage étant maintenu assemblé par des tirants munis de rondelles élastiques.In patent application WO90 / 12147, a sieve consisting of a stack of cylindrical elements has been described. made of ceramic material between which are interposed crowns, this stack being kept assembled by tie rods provided with elastic washers.
Cependant malgré la présence de ces rondelles élastiques, du fait que les éléments filtrants sont en céramiques et que les couronnes intercalaires sont massives, un tel tamis ne présente aucune élasticité.However, despite the presence of these elastic washers, owing to the fact that the filter elements are made of ceramic and that the intermediate rings are solid, such a sieve has no elasticity.
Or il s'avère que polir les tamis de pâte à papier qui sont munis d'un organe mobile de décolmatage par variation de pression (communément appelé "foil") il est préférable que ces tamis présentent une certaine élasticité.Now it turns out that polishing the paper pulp sieves which are provided with a movable member for unclogging by pressure variation (commonly called "foil") it is preferable that these sieves have a certain elasticity.
La présente invention concerne un tamis constitué par un empilage d'éléments circulaires empilés les uns sur les autres et maintenus assemblés par une pluralité de tirants parallèles aux génératrices du cylindre, dans lequel chaque élément circulaire est constitué par un profilé en U cintré de façon à constituer un cercle.The present invention relates to a screen consisting of a stack of circular elements stacked on top of each other and held together by a plurality of tie rods parallel to the generatrices of the cylinder, in which each circular element is constituted by a U-profile bent so as to constitute a circle.
Du fait que les éléments circulaires sont faits à partir d'éléments en U il se produira, sous l'effet de la traction exercée par les tirants, d'une part une légère flexion des deux branches du U, qui se rapprochent légèrement l'une de l'autre; d'autre part une légère déformation de la base du U qui se bombe très légèrement.Because the circular elements are made from U-shaped elements, there will occur, under the effect of the traction exerted by the tie rods, on the one hand a slight bending of the two branches of the U, which slightly approach the one of the other; on the other hand a slight deformation of the base of the U which bulges very slightly.
On obtient ainsi un empilage ayant une élasticité suffisante pour encaisser les variations de pression provoquée par le foil, et pour permettre de déterminer à volonté l'effet, de pré-tension qui est donné par les tirants.A stack is thus obtained having sufficient elasticity to withstand the pressure variations caused by the foil, and to allow the pre-tensioning effect which is given by the tie rods to be determined at will.
On obtient en plus une fixation des éléments en U sans avoir recours, comme c'était le cas précédemment à la soudure ou à la pose d'un cavalier sur les extrémités des branches des U.One obtains in addition a fixing of the U-shaped elements without having recourse, as was the case previously to welding or to placing a jumper on the ends of the branches of the U's.
Cette élasticité et cette pré-tension, qui sont recherchées afin d'avoir une bonne tenue à l'usage du tamis présentent cependant un inconvénient pour les tamis de grands diamètres, c'est-à-dire ayant un diamètre supérieur à 1 mètre parce qu'il se produit alors des glissements des cercles en U les uns sur les autres et la pile de cercles en U se déforme.This elasticity and this pre-tension, which are sought in order to have good resistance to the use of the sieve, however, have a drawback for sieves of large diameters, that is to say having a diameter greater than 1 meter because that sliding of the U-shaped circles occurs on top of each other and the stack of U-shaped circles is deformed.
Selon une variante de réalisation de l'invention les tirants sont associés à deux couronnes supérieure et inférieure pour constituer une ossature cylindrique rigide sur laquelle les cercles en U sont enfilés; la mise en pré-tension desdits cercles étant réalisée par serrage sur l'empilement d'une couronne additionnelle.According to an alternative embodiment of the invention the tie rods are associated with two upper and lower rings to form a rigid cylindrical frame on which the U-shaped circles are threaded; the pre-tensioning of said circles being carried out by tightening on the stack of an additional crown.
A titre d'exemple non limitatif et pour faciliter la compréhension de l'invention, on a représenté aux figures annexées :
- Figure 1, une vue schématique d'un tamis de type connu;
- Figure 2, une vue en coupe de profilé en U au moyen duquel est réalisé le tamis la figure 1;
- Figure 3, un premier mode de réalisation de l'invention;
- Figure 4, une vue partielle à plus grande échelle de la figure 3.
- Figure 5, une vue de dessus du tamis de la figure 3;
- Figure 6, un deuxième mode de réalisation de l'invention;
- Figure 7, une vue de dessus du tamis de la figure 5.
- Figure 8, une vue partielle illustrant le montage et la mise en tension des cercles en U pour un tamis centripète de grandes dimensions.
- Figure 1, a schematic view of a known type of sieve;
- Figure 2, a sectional view of a U-shaped section by means of which the screen is made Figure 1;
- Figure 3, a first embodiment of the invention;
- Figure 4, a partial view on a larger scale of Figure 3.
- Figure 5, a top view of the screen of Figure 3;
- Figure 6, a second embodiment of the invention;
- Figure 7, a top view of the screen of Figure 5.
- Figure 8, a partial view illustrating the mounting and tensioning of the U-shaped circles for a large centripetal sieve.
Les figures 1 et 2 représentent un tamis de type connu, tel que décrit dans le brevet n° 88.10863 du 12/08/1988.Figures 1 and 2 show a known type of sieve, as described in patent No. 88.10863 of 12/08/1988.
En se reportant à ces figures, on voit que pour réaliser un tamis, on utilise un profilé dont la section est un U dont la base est percée soit par des fentes soit par des trous.Referring to these figures, we see that to make a sieve, we use a profile whose section is a U whose base is pierced either by slots or by holes.
Le profilé en U ainsi préparé est ensuite cintré, ce après quoi ou bien on l'enroule en spirale ou bien on le coupe en morceaux de même longueur de façon à réaliser des cercles qui sont empilés les uns sur les autres.The U-profile thus prepared is then bent, after which either it is wound in a spiral or else it is cut into pieces of the same length so as to form circles which are stacked on top of each other.
Lorsque le tamis doit fonctionner en régime centrifuge (c'est-à-dire lorsque la matière à filtrer est introduite à l'intérieur du cylindre), le profilé en U est disposé de façon que les deux parois latérales du U soient tournées vers l'extérieur. A l'opposé, lorsque le tamis doit fonctionner en régime centripète (c'est-à-dire lorsque la matière à filtrer circule de l'extérieur vers l'intérieur), les parois latérales du U sont tournées vers l'intérieur.When the screen is to operate in centrifugal mode (i.e. when the material to be filtered is introduced inside the cylinder), the U-shaped profile is arranged so that the two side walls of the U are facing towards the 'outside. Conversely, when the sieve must operate in centripetal regime (that is to say when the material to be filtered circulates from the outside to the inside), the side walls of the U are turned inward.
Dans les deux cas, il est impératif de fixer les unes aux autres les circonvolutions du profilé en U.In both cases, it is imperative to fix the convolutions of the U-profile to each other.
Dans le premier cas, lorsque les parois latérales du U sont tournées vers l'extérieur, il est possible de les fixer les unes aux autres par un étrier ou par un cordon de soudure ; mais cette opération supplémentaire est onéreuse.In the first case, when the side walls of the U are facing outwards, it is possible to fix them to each other by a stirrup or by a weld bead; but this additional operation is expensive.
Dans le deuxième cas, il s'avère très difficile de réaliser un cordon de soudure à l'intérieur du cylindre ainsi formé et il est pratiquement impossible de mettre en place un étrier.In the second case, it turns out to be very difficult to produce a weld bead inside the cylinder thus formed and it is practically impossible to install a stirrup.
Selon la présente invention, on réalise avec le profilé en U des cercles de même diamètre. Pour cela ou bien on cintre le profilé en U de façon à obtenir plusieurs enroulements, puis on découpe des tronçons qui permettent de former des cercles au diamètre souhaité; ou bien on découpe le profilé en U en tronçons de même longueur et on les cintre de façon à former un cercle.According to the present invention, circles of the same diameter are produced with the U-shaped profile. For that or else bend the U-shaped section so as to obtain several windings, then cut sections which make it possible to form circles with the desired diameter; or else cut the U-shaped section into sections of the same length and bend them so as to form a circle.
Lorsque le cercle est mis en forme, les deux extrémités du tronçon sont soudées l'une à l'autre; de sorte que l'on obtient un cercle rigide.When the circle is shaped, the two ends of the section are welded to each other; so that we get a rigid circle.
Suivant le sens dans lequel chaque tronçon est incurvé, on obtient un cercle 1 dans lequel les parois latérales du U sont tournées vers l'intérieur, comme représenté à la figure 3 ou bien un cercle 1' dans lequel les parois latérales du U sont tournées vers l'extérieur, comme représenté à la figure 6.Depending on the direction in which each section is curved, a
Les cercles ainsi obtenus sont ensuite empilés les uns sur les autres.The circles thus obtained are then stacked on top of each other.
Pour les maintenir serrés les uns contre les autres, on dispose à la base de l'empilage, une couronne 2 et au sommet une autre couronne 3.To keep them tight against each other, there is a
Entre les couronnes 2 et 3, on dispose une pluralité de tirants 4.Between the
Ces tirants 4 sont filetés à leurs deux extrémités de façon à pouvoir recevoir des écrous 6 qui permettent de réaliser un serrage suffisamment important pour que les cercles soient maintenus sans jeu les uns contre les autres en opération.These
Dans l'exemple représenté à la figure 3, chaque tirant 4 est vissé dans la couronne inférieure 2 et est muni d'un écrou 6 sa partie supérieure ; mais il est possible de mettre un écrou 6 à chaque extrémité, les deux couronnes 2 et 3 étant alors identiques.In the example shown in Figure 3, each
Dans le cas des figures 3 et 4 qui représentent un tamis devant fonctionner en régime centripète, il est préférable qu'il y ait le moins d'obstacles possibles à la surface extérieure du tamis : les tirants 4 sont alors disposés à l'intérieur du tamis.In the case of FIGS. 3 and 4 which represent a sieve which must operate in centripetal regime, it is preferable that there are as few obstacles as possible on the outside surface of the screen: the
Dans le cas des figures 5 et 6, c'est la paroi interne du tamis qui ne doit comporter aucun obstacle ; de sorte que les tirants 4' se trouvent alors à l'extérieur.In the case of FIGS. 5 and 6, it is the internal wall of the screen which must not contain any obstacle; so that the tie rods 4 'are then outside.
Dans les deux cas, afin que l'empilage des cercles soit stable, il est préférable d'interposer régulièrement des couronnes 5.In both cases, so that the stacking of the circles is stable, it is preferable to regularly interpose crowns 5.
Cette disposition est particulièrement avantageuse. En effet :
- il s'avère plus facile et moins onéreux de fabriquer des cercles qu'une spirale;
- il y a beaucoup moins de soudure à faire, puisqu'il n'y a qu'une soudure par cercle au lieu d'une soudure tout le long de la spirale;
- il est possible de faire aussi facilement des tamis centrifuges ou des tamis centripètes;
- la suppression des soudures évite les problèmes de déformation et de fragilisation locale dus à la soudure;
- cela permet une réduction très importante de la durée d'assemblage et rend possible le regroupement des opérations d'assemblage et de contrôle dimensionnel final du tamis.
- it is easier and less expensive to make circles than a spiral;
- there is much less welding to be done, since there is only one welding per circle instead of one welding all along the spiral;
- centrifugal sieves or centripetal sieves can also be made easily;
- the elimination of welds avoids the problems of deformation and local embrittlement due to the weld;
- this allows a very significant reduction in the assembly time and makes it possible to group together the assembly operations and final dimensional control of the sieve.
Mais surtout cela permet d'obtenir un empilage de U qui soit rigide tout en ayant une certaine élasticité.But above all it allows to obtain a stack of U which is rigid while having a certain elasticity.
En effet comme cela a déjà été mentionné précédemment sous l'effet de la traction exercée par les tirants 4 les U vont avoir tendance à se déformer élastiquement, les deux branches de chaque U se rapprochant légèrement l'une de l'autre et le fond de chaque U se bombant légèrement.Indeed, as has already been mentioned previously under the effect of the traction exerted by the
Cette élasticité permet d'appliquer avec précision une pré-tension déterminée, ce qui n'est pas possible avec l'empilage décrit dans le brevet antérieur WO90/12147 et l'on peut donc ainsi adapter chaque tamis aux variations de pression qu'il subira en fonctionnement.This elasticity makes it possible to apply a precise pre-tension with precision, which is not possible with the stacking described in the prior patent WO90 / 12147 and it is therefore possible to adapt each screen to the pressure variations that it will undergo in operation.
Cette élasticité relative est un grand avantage, mais elle présente un inconvénient pour les tamis de grands diamètres, c'est-à-dire pour des tamis dont le diamètre est supérieur à 1 mètre.This relative elasticity is a great advantage, but it has a disadvantage for sieves of large diameters, that is to say for sieves whose diameter is greater than 1 meter.
En effet, il se produit alors inévitablement des glissements des cercles en U les uns sur les autres.Indeed, it then inevitably occurs sliding of the U-shaped circles on each other.
De tels glissements ne peuvent pas se produire avec les éléments du brevet antérieur WO90/12147 parce que ces éléments comportent des crans qui s'emboîtent dans des rainures ; mais il n'est pas possible de réaliser de tels crantages sur les parois des profilés en U.Such slippages cannot occur with the elements of the prior patent WO90 / 12147 because these elements include notches which fit into grooves; but it is not possible to make such notches on the walls of the U-shaped profiles.
Selon l'invention et comme cela est illustré à la figure 8 on utilise les tirants, non pas pour serrer les U les uns contre les autres mais pour constituer, en coopération avec deux couronnes, une ossature cylindrique rigide sur laquelle les U sont enfilés les uns après les autres. Le serrage élastique avec pré-tension des U se fait ensuite au moyen d'une couronne additionnelle, dite couronne de serrage qui est vissée avec précision sur ladite ossature rigide.According to the invention and as illustrated in FIG. 8, the tie rods are used, not to clamp the Us against each other but to constitute, in cooperation with two crowns, a rigid cylindrical framework on which the Us are threaded. one after the other. The elastic tightening with pre-tensioning of the Us is then carried out by means of an additional crown, known as a clamping crown which is precisely screwed onto said rigid framework.
En se reportant à la figure 8 on voit que l'ossature cylindrique rigide est réalisée par des barreaux 14 qui sont, au moyen de vis 15 fixés solidement à une couronne supérieure 10 et une couronne inférieure 12. Ainsi les deux couronnes 10-12 et les barreaux 14 forment une sorte de cage solide. Pour améliorer la rigidités de l'ensemble, les extrémités 14a et 14b des barreaux 14 viennent s'encastrer dans des logements correspondants ménagés dans les couronnes 10 et 12.Referring to FIG. 8, it can be seen that the rigid cylindrical framework is produced by
Les cercles 11 en U sont alors enfilés sur la cage ainsi formée. Bien évidemment les dimensions des couronnes 10-12 et des barreaux 14 sont déterminés de façon à correspondre au diamètre interne des cercles 11 en U.The U-shaped circles 11 are then threaded onto the cage thus formed. Obviously the dimensions of the crowns 10-12 and of the
Une couronne 13 est alors mise en place sur le cercle en U qui est le premier de l'empilement et cette couronne 13 est serrée par une pluralité de vis 17 sur la couronne supérieure 10. La face inférieure 13a de la couronne 13 exerce ainsi une pression de serrage sur l'empilement des cercles 11.A
De préférence on dispose entre la face inférieure 13a de la couronne de serrage 13 et le premier cercle 11 une ou plusieurs cales 16.Preferably, one or
De préférence également on dispose entre la couronne de serrage 13 et la couronne supérieure des cales 18 sous forme de rondelles.Preferably also there are between the clamping
Ainsi grâce aux cales 18 on peut déterminer avec précision la course de serrage de la couronne 13 sur la couronne 10 et donc, compte tenu de l'épaisseur des cales 16, la valeur exacte de la pré-tension à laquelle est soumis l'empilage des cercles 11 en profilé en U.Thus, thanks to the
Bien évidemment l'invention n'est pas limitée au mode de réalisation tel que décrit à la figure 8 qui n'est donné qu'à titre d'exemple ; tout autre mode de réalisation d'une structure rigide sur laquelle les cercles 11 en profilé en U sont enfilés entrant dans le cadre de la présente invention.Obviously the invention is not limited to the embodiment as described in Figure 8 which is given only by way of example; any other embodiment of a rigid structure on which the
Claims (13)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9412267 | 1994-10-14 | ||
| FR9412267A FR2725737B1 (en) | 1994-10-14 | 1994-10-14 | IMPROVEMENTS ON PURIFICATION SIEVES, ESPECIALLY FOR PAPER PULP |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0707109A1 true EP0707109A1 (en) | 1996-04-17 |
| EP0707109B1 EP0707109B1 (en) | 1999-01-13 |
Family
ID=9467851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95402233A Expired - Lifetime EP0707109B1 (en) | 1994-10-14 | 1995-10-06 | Straining screen, in particular for paper pulp |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US5697503A (en) |
| EP (1) | EP0707109B1 (en) |
| JP (1) | JPH08206600A (en) |
| KR (1) | KR100391996B1 (en) |
| AT (1) | ATE175739T1 (en) |
| BR (1) | BR9504352A (en) |
| CA (1) | CA2160222C (en) |
| DE (1) | DE69507243T2 (en) |
| ES (1) | ES2129781T3 (en) |
| FI (1) | FI110525B (en) |
| FR (1) | FR2725737B1 (en) |
| NO (1) | NO306567B1 (en) |
| TW (1) | TW305897B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2794478A1 (en) * | 1999-06-04 | 2000-12-08 | Lamort E & M | CYLINDRICAL SIEVES, ESPECIALLY FOR PAPER PULP |
| EP1582271A1 (en) * | 2002-12-27 | 2005-10-05 | Tsukasa industry Co. Limited | Circular-cylinder sieve |
| US8297445B2 (en) | 2007-11-14 | 2012-10-30 | Filtration Fibrewall Inc. | Screen basket |
| US8469198B2 (en) | 2005-05-09 | 2013-06-25 | Kadant Canada Corp. | Screen basket with replaceable profiled bars |
| CN106391461A (en) * | 2016-11-28 | 2017-02-15 | 新乡市振英机械设备有限公司 | Linear screen base fixing device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2509966A1 (en) * | 2005-06-01 | 2006-12-01 | Accent Manufacturing, Inc. | Internally fed rotary screen manure separator |
| CN101676048B (en) * | 2008-09-19 | 2011-11-09 | 赵仁理 | Cylindrical shape automatic riveted-joint apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0354846A1 (en) | 1988-08-12 | 1990-02-14 | E & M LAMORT | Screen for the purification and classification of a pulp suspension |
| FR2635344A1 (en) | 1988-08-12 | 1990-02-16 | Lamort E & M | Improvements to screens for paper pulp cleaners and classifiers and processes for producing such screens |
| WO1990012147A1 (en) | 1989-04-04 | 1990-10-18 | A. Ahlstrom Corporation | Sectional screen cylinder |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NZ182084A (en) * | 1976-09-17 | 1981-02-11 | Contra Shear Holdings | Rotating drum screen |
| FR2676076B1 (en) * | 1991-05-03 | 1993-08-06 | Lamort E & M | CYLINDRICAL SIEVE END CROWN FOR PAPER PURIFIER AND CLASSIFIER AND METHOD FOR PRODUCING THE SAME. |
-
1994
- 1994-10-14 FR FR9412267A patent/FR2725737B1/en not_active Expired - Fee Related
-
1995
- 1995-10-06 EP EP95402233A patent/EP0707109B1/en not_active Expired - Lifetime
- 1995-10-06 DE DE69507243T patent/DE69507243T2/en not_active Expired - Lifetime
- 1995-10-06 AT AT95402233T patent/ATE175739T1/en not_active IP Right Cessation
- 1995-10-06 ES ES95402233T patent/ES2129781T3/en not_active Expired - Lifetime
- 1995-10-10 CA CA002160222A patent/CA2160222C/en not_active Expired - Fee Related
- 1995-10-10 BR BR9504352A patent/BR9504352A/en not_active IP Right Cessation
- 1995-10-11 NO NO954037A patent/NO306567B1/en not_active IP Right Cessation
- 1995-10-12 US US08/542,012 patent/US5697503A/en not_active Expired - Lifetime
- 1995-10-12 TW TW084110704A patent/TW305897B/zh not_active IP Right Cessation
- 1995-10-12 KR KR1019950035031A patent/KR100391996B1/en not_active IP Right Cessation
- 1995-10-13 FI FI954885A patent/FI110525B/en active
- 1995-10-13 JP JP7290633A patent/JPH08206600A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0354846A1 (en) | 1988-08-12 | 1990-02-14 | E & M LAMORT | Screen for the purification and classification of a pulp suspension |
| FR2635344A1 (en) | 1988-08-12 | 1990-02-16 | Lamort E & M | Improvements to screens for paper pulp cleaners and classifiers and processes for producing such screens |
| WO1990012147A1 (en) | 1989-04-04 | 1990-10-18 | A. Ahlstrom Corporation | Sectional screen cylinder |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2794478A1 (en) * | 1999-06-04 | 2000-12-08 | Lamort E & M | CYLINDRICAL SIEVES, ESPECIALLY FOR PAPER PULP |
| US6338412B1 (en) | 1999-06-04 | 2002-01-15 | E & M Lamort | Cylindrical screen, particularly for paper pulp |
| USRE38738E1 (en) | 1999-06-04 | 2005-05-31 | Kadant Lamort | Cylindrical screen, particularly for paper pulp |
| EP1582271A1 (en) * | 2002-12-27 | 2005-10-05 | Tsukasa industry Co. Limited | Circular-cylinder sieve |
| EP1582271A4 (en) * | 2002-12-27 | 2010-05-26 | Tsukasa Kasei Kogyo | Circular-cylinder sieve |
| US8469198B2 (en) | 2005-05-09 | 2013-06-25 | Kadant Canada Corp. | Screen basket with replaceable profiled bars |
| US8297445B2 (en) | 2007-11-14 | 2012-10-30 | Filtration Fibrewall Inc. | Screen basket |
| CN106391461A (en) * | 2016-11-28 | 2017-02-15 | 新乡市振英机械设备有限公司 | Linear screen base fixing device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR960014532A (en) | 1996-05-22 |
| CA2160222C (en) | 2006-09-12 |
| DE69507243D1 (en) | 1999-02-25 |
| JPH08206600A (en) | 1996-08-13 |
| KR100391996B1 (en) | 2003-11-13 |
| FR2725737B1 (en) | 1997-01-31 |
| DE69507243T2 (en) | 1999-09-02 |
| BR9504352A (en) | 1997-09-02 |
| US5697503A (en) | 1997-12-16 |
| EP0707109B1 (en) | 1999-01-13 |
| ATE175739T1 (en) | 1999-01-15 |
| FR2725737A1 (en) | 1996-04-19 |
| CA2160222A1 (en) | 1996-04-15 |
| NO306567B1 (en) | 1999-11-22 |
| NO954037D0 (en) | 1995-10-11 |
| ES2129781T3 (en) | 1999-06-16 |
| FI954885A0 (en) | 1995-10-13 |
| FI954885A (en) | 1996-04-15 |
| FI110525B (en) | 2003-02-14 |
| NO954037L (en) | 1996-04-15 |
| TW305897B (en) | 1997-05-21 |
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