EP0964748A1 - Method and device for fragmenting bulk materials - Google Patents

Method and device for fragmenting bulk materials

Info

Publication number
EP0964748A1
EP0964748A1 EP98902931A EP98902931A EP0964748A1 EP 0964748 A1 EP0964748 A1 EP 0964748A1 EP 98902931 A EP98902931 A EP 98902931A EP 98902931 A EP98902931 A EP 98902931A EP 0964748 A1 EP0964748 A1 EP 0964748A1
Authority
EP
European Patent Office
Prior art keywords
sieve
rotor
elements
deflection
deflection elements
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
EP98902931A
Other languages
German (de)
French (fr)
Other versions
EP0964748B1 (en
Inventor
Guido Kraemer
Eugen Chrapatsch
Volodia Chrapatsch
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.)
Buehler AG
Original Assignee
Buehler AG
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 Buehler AG filed Critical Buehler AG
Publication of EP0964748A1 publication Critical patent/EP0964748A1/en
Application granted granted Critical
Publication of EP0964748B1 publication Critical patent/EP0964748B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/282—Shape or inner surface of mill-housings
    • B02C13/284—Built-in screens

Definitions

  • the invention relates to a method and a device for comminuting bulk goods, in particular grain, which are used in the compound feed industry and in the milling industry.
  • a large number of grinding devices are known, in which a rotor with striking elements, which is surrounded on the entire circumference or only partially with a sieve, is arranged in a housing.
  • the material is fed into a work zone, i.e. a zone between the striking elements and the inner surface of a chamber (sieve, baffle plate), which encloses the rotor and comminutes it there.
  • a work zone i.e. a zone between the striking elements and the inner surface of a chamber (sieve, baffle plate), which encloses the rotor and comminutes it there. Since the striking organs move directly in the layer of comminuted material, the grinding is dominated by the rubbing principle, which in the end results in over-crushing of the particles, excessive energy consumption and intensive wear and tear on the striking organs and the rotor.
  • a device of the type mentioned above is known from DE 1 250 721. This discloses a beater mill in which rotating beater elements interact with friction or baffle jaws arranged in a sieve basket between sieve plates. A particularly high energy consumption arises when using the embodiment according to FIG. 4 with a two-armed cross beater and three friction jaws.
  • GB 1 41 1 085 discloses an impact mill in which the flow of the material that has entered the grinding chamber of the mill is influenced by the special conical design of the rotor end. This can reduce the excessive wear of the rotor.
  • the aim of the present invention is to reduce the energy consumption during grinding, to increase the uniformity of the grain size of the product and in increasing the lifespan of the work organs and the sieve.
  • the device according to the invention has a housing with inlet and outlet nozzles, a racket rotor and a screen with a plurality of deflection elements which surround the pop rotor.
  • the baffles on the circumference of the sieve are arranged at the same or varying distance from the rackets.
  • the deflection elements have a smooth surface with an inclination of 20 to 80 degrees to the radius and form a distance from the rotor, the minimum width of which is not greater than the diameter of the grains to be processed.
  • the deflection elements are designed to be rotatable in relation to the radius, i.e. rotatable about a pivot point on the screen surface in the direction of this screen surface or in the opposite direction.
  • the deflection elements are arranged radially and form a triangular prism, the lateral edges of which are directed towards the sieve.
  • the deflection elements can be adjusted along the screen circumference.
  • the possibility of displaceable execution of the deflection elements along the circumference of the sieve surface ensures uniform wear of the sieve during operation, since it already covers worn segments of the sieve.
  • the next impact element of the rotor is impacted, so that after the product stream is fed into the grinding chamber, a pulsating character is added, with the supply and discharge to the impact organs being changed several times
  • FIG. 1 schematic representation of the impact mill in longitudinal view
  • Fig. 4 schematic representation of the mill in side view when using adjustable deflection elements
  • 5 shows a schematic view of a sieve detail with an adjustable deflection element.
  • the beater mill in FIG. 1 consists of a housing 1 with an inlet nozzle 2 and an outlet nozzle 3. Inside the housing 1 there is a rotor 4 with the beating elements 5.
  • the rotor is surrounded by a sieve 6, on the surface 6a of which a plurality of deflection elements 7 , 9, preferably with a triangular cross section.
  • the screen 6 is divided on its circumference into screen segments by the deflection elements 7, 9, which are directed inwards from the screen to the rotor and have a smooth working surface with an inclination in the direction of rotation of the rotor.
  • the angle of inclination in relation to the radius is in the range from 20 to 80 degrees and the distance h between the ends of the impact members 5 and the deflection elements 7, 9 is not less than the grain diameter of the starting product).
  • FIG 3 shows the screen 6, which is alternately divided into segments A and B with different perforations, the triangular prisms covering the segments of the same perforation.
  • FIG. 4 shows an adjustable arrangement of the deflecting elements 7 and FIG. 5 shows the directions of rotation of the deflecting element 7 to and from the sieve 6 around a pivot point 80 arranged on the sieve surface 6a.
  • the direction of rotation of the rotor 4 can take place both clockwise and counterclockwise.
  • the deflection elements 7, 9 can be displaced in a ring 10 along the circumference of the sieve 6, cf. in particular Fig.2a arranged.
  • the mill works as follows
  • the starting product (uncrushed grain) is fed to the rotor 4 from two sides via the inlet connection 2 in FIG. 1 and, under the action of the centrifugal forces Z on the curved rotor path, reaches the sieve surface 6a or a sieving section S (see FIG. 2), which passes through two successive deflection elements 7 and 9 is limited. It should be noted that the starting product within the rotor 4 is subjected to partial comminution under the action of the striking elements 5. During its movement along the sieve 6 in FIG.
  • the product comes onto the smooth, inclined surface of the deflection element 7, changes its direction of movement and arrives so under a single stroke of the striking element 5 of the rotor 4
  • the product impacts the striking element 5, it is broken down into particles of different sizes which, under the action of the inertial forces which are given to them during the stroke, arrive at the next sieving section S which the deflecting element 7 in the
  • Direction of rotation of the rotor 4 follows. During the movement along the sieve surface 6a under the influence of the centrifugal forces and the air flow generated by the rotor, the product is separated into large particles which have passed through the perforation of the sieve 6 are over the discharge nozzle 3 is removed from the impact mill as the starting product (finished product). The coarser particles and a certain number of small particles which have not had time to pass through the sieve reach the next deflecting element 7 which lies in the direction of movement of the product
  • Each subsequent product requirement for comminution with the aid of the deflecting elements 7, 9 differs from the previous one in that the amount of product decreases continuously because the particles of the required size are continuously removed through the perforation of the sieve 6
  • the process for crushing debris is based on the following principles
  • the crushing principle of the impact mill is based on the crushing without direct interaction of the rotor 4 and sieve 5, which manifests itself in a reduction in energy consumption and in an increase in the life of the impact organs.
  • the perforated surface of the chamber is spaced from the rotor by the distance necessary to prevent the rotor from striking the product as it passes
  • the process has the best efficiency if the product is fed to the rotor at a certain angle. This angle to the radius must be in the range of 20 to 80 degrees.
  • P1, P2 double arrows indicate the deflection of the material to and from the percussion organs

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Disintegrating Or Milling (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Crushing And Grinding (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Abstract

The invention relates to a method and a device for fragmenting bulk materials. A rotor (4) having beating elements (5) is positioned in the milling chamber of said device and surrounded by a sieve (6) which has several deflecting elements (7, 9) on its surface (6a). The milling process is characterized by a pulsing motion, whereby the direction in which the product is fed to and drawn away from the beating elements alternates, which separates the fines from the total flow.

Description

Verfahren und Vorrichtung zur Zerkleinerung von Schüttgütern Method and device for comminuting bulk goods
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Zerkleinerung von Schüttgütern, insbesondere von Getreide, welche in der Mischfutterindustrie und in der Müllerei verwendet werden.The invention relates to a method and a device for comminuting bulk goods, in particular grain, which are used in the compound feed industry and in the milling industry.
Es ist eine grosse Anzahl von Vermahlungsvorrichtungen bekannt, bei welcher in einem Gehäuse ein Rotor mit Schlagorganen, der am ganzen Umfang oder nur teilweise mit einem Sieb umgeben ist, angeordnet ist. In diesen Vorrichtungen wird das Material in eine Arbeitszone zugeführt, d.h. eine Zone zwischen den Schlagorganen und der inneren Fläche einer Kammer (Sieb, Prallplatte), welche den Rotor umschliesst und dorthin zerkleinert. Da die Schlagorgane sich direkt in der Schicht des zerkleinerten Materials bewegen, wird die Vermahlung von dem Reibprinzip dominiert, was sich im Endeffekt in der Überzerklemerung der Teil- chen, in zu hohem Energieverbrauch und in intensiver Abnutzung der Schlagorgane und des Rotors aussert.A large number of grinding devices are known, in which a rotor with striking elements, which is surrounded on the entire circumference or only partially with a sieve, is arranged in a housing. In these devices, the material is fed into a work zone, i.e. a zone between the striking elements and the inner surface of a chamber (sieve, baffle plate), which encloses the rotor and comminutes it there. Since the striking organs move directly in the layer of comminuted material, the grinding is dominated by the rubbing principle, which in the end results in over-crushing of the particles, excessive energy consumption and intensive wear and tear on the striking organs and the rotor.
Eine Vorrichtung der oben genannten Art ist aus der DE 1 250 721 bekannt Diese offenbart eine Schlagermühle, bei welcher umlaufende Schlagelemente mit in einem Siebkorb zwischen Siebblechen angeordneten Reib bzw Prallbacken zusammenwirken. Ein insbesondere hoher Energieverbrauch entsteht bei Anwendung der Ausführungsform laut Fig. 4 mit einem zweiarmigen Schlagkreuz und drei Reibbacken.A device of the type mentioned above is known from DE 1 250 721. This discloses a beater mill in which rotating beater elements interact with friction or baffle jaws arranged in a sieve basket between sieve plates. A particularly high energy consumption arises when using the embodiment according to FIG. 4 with a two-armed cross beater and three friction jaws.
In der GB 1 41 1 085 ist eine Schlagmühle offenbart, bei welcher durch besondere konische Ausbildung des Rotorendes die Strömung des in die Vermahlungskammer der Mühle gelangten Materials beeinflusst wird. Damit kann die übermässige Abnutzung des Rotors vermindert werden.GB 1 41 1 085 discloses an impact mill in which the flow of the material that has entered the grinding chamber of the mill is influenced by the special conical design of the rotor end. This can reduce the excessive wear of the rotor.
Ziel der vorliegenden Erfindung liegt in der Verminderung der Energieaufnahme bei der Vermahlung, in der Erhöhung der Gleichmassigkeit der Körnung des Fer- tigproduktes und in der Erhöhung der Lebensdauer der Arbeitsorgane sowie des Siebes.The aim of the present invention is to reduce the energy consumption during grinding, to increase the uniformity of the grain size of the product and in increasing the lifespan of the work organs and the sieve.
Die emndungsgemasse Vorrichtung weist ein Gehäuse mit Einlauf- und Auslauf- stutzen, ein Schlägerrotor und ein Sieb mit mehreren Ablenkelementen, welche den Schlagerrotor umgeben, auf. Die Ablenkplatten am Umfang des Siebes sind im gleichen oder variierenden Abstand zu den Schlägern angeordnet. Die Ablenkelemente haben glatte Oberfläche mit einer Neigung von 20 bis 80 Grad zum Radius und bilden gegenüber dem Rotor einen Abstand, dessen Minimalbreite nicht grosser ist als der Durchmesser der zu Bearbeitung gelangenden Korner.The device according to the invention has a housing with inlet and outlet nozzles, a racket rotor and a screen with a plurality of deflection elements which surround the pop rotor. The baffles on the circumference of the sieve are arranged at the same or varying distance from the rackets. The deflection elements have a smooth surface with an inclination of 20 to 80 degrees to the radius and form a distance from the rotor, the minimum width of which is not greater than the diameter of the grains to be processed.
Dabei sind die Ablenkelemente in ihrer Neigung gegenüber dem Radius drehbar ausgeführt, d.h. drehbar um einen Drehpunkt an der Sieboberfläche in Richtung dieser Sieboberfläche bzw. in Gegenrichtung.The deflection elements are designed to be rotatable in relation to the radius, i.e. rotatable about a pivot point on the screen surface in the direction of this screen surface or in the opposite direction.
Nach einer bevorzugten Ausführungsform sind die Ablenkelemente radial angeordnet und bilden ein dreieckiges Prisma, dessen seitliche Kanten zum Sieb gerichtet sind.According to a preferred embodiment, the deflection elements are arranged radially and form a triangular prism, the lateral edges of which are directed towards the sieve.
Dabei sind die Ablenkelemente entlang dem Siebumfang verstellbar. Durch die Möglichkeit der verschiebbaren Ausfuhrung der Ablenkelemente entlang dem Umfang der Sieboberfiache wird eine gleichmassige Abnutzung des Siebes im Betrieb erreicht, da damit bereits abgenutzte Segmente des Siebes abgedeckt werden.The deflection elements can be adjusted along the screen circumference. The possibility of displaceable execution of the deflection elements along the circumference of the sieve surface ensures uniform wear of the sieve during operation, since it already covers worn segments of the sieve.
Andererseits ist es möglich beim Einsatz von Sieben mit wechselnd angeordneten Segmenten verschiedener Lochung, durch die gemeinsame Verschiebung der pπsmenformigen Arbeitselemente entlang der Sieboberfläche die Siebsegmente mit gleicher Lochung abzudecken. Dadurch kann die Granulation des Endpro- duktes vorausbestimmt werden. Die Vermahlung bzw Zerkleinerung der oben gezeigten Vorrichtung erfolgt in einer Arbeitszone zwischen den Ablenkelementen und den Schlagorganen des Rotors und geht von sog Prallprinzip hinaus Bei jeder Zufuhr des Produktstroms zu den Schlagorganen wird ein einziger Schlag in das Flugprodukt ausgeführt Damit wird der Teilchenstrom in Grob- und Kleinteilchen getrennt Die Grobteil- chen mit hoher kinetischer Energie fliegen unmittelbar zu dem nächsten Schlagorgan, dagegen die Kleinteichen mit weniger kinetischen Energie , unter Einwirkung des durch den Rotor erzeugten Luftstromes diesen umfliegen und ihre Bewegung entlang der gelochten Kammeroberflache fortsetzen und die Kammer verlassen Damit wird die Feinfraktion separiert ohne das die gemeinsameOn the other hand, when using sieves with alternately arranged segments of different perforations, it is possible to cover the sieve segments with the same perforations by jointly moving the psm-shaped working elements along the sieve surface. The granulation of the end product can thus be predetermined. The grinding or crushing of the device shown above takes place in a working zone between the deflection elements and the striking elements of the rotor and goes beyond the so-called impact principle. Each time the product stream is fed to the striking elements, a single blow is carried out into the flight product Small particles separated The large particles with high kinetic energy fly directly to the next impact organ, whereas the small ponds with less kinetic energy fly around under the influence of the air flow generated by the rotor and continue their movement along the perforated chamber surface and leave the chamber Fine fraction separated without the common
Schlageinwirkung des nächsten Schlagorgans des Rotors erfolgt Damit wird dem Produktstrom nach seiner Zufuhr in die Vermahlungskammer ein pulsierender Charakter beigegeben mit mehrfachen Wechsel der Zufuhr und Abfuhr zu den SchlagorganenThe next impact element of the rotor is impacted, so that after the product stream is fed into the grinding chamber, a pulsating character is added, with the supply and discharge to the impact organs being changed several times
Ferner wird darauf hingewiesen, dass sich der Wirkungsgrad des Prozesses erhöht, wenn das Material in einem bestimmten Winkel zum Rotor zugeführt wird Dieser Winkel variiert zum Radius im Bereich von 20-80 GradIt is also pointed out that the efficiency of the process increases if the material is fed to the rotor at a certain angle. This angle varies with the radius in the range of 20-80 degrees
Die Erfindung wird folgend an Hand von Zeichnungen und Ausfuhrungsbeispielen naher dargestellt es zeigenThe invention is shown in more detail below with the aid of drawings and exemplary embodiments
Fig 1 schematische Darstellung der Schlagmühle in LangsansichtFig. 1 schematic representation of the impact mill in longitudinal view
Fig 2, 2a schematische Darstellungen der Schlagmühle in Seitenansicht bei Verwendung von radial angeordneten Ablenkelementen,2, 2a schematic representations of the impact mill in side view when using radially arranged deflection elements,
Fig 3 Draufsicht des Siebes mit Segmenten verschiedener Lochung,3 top view of the screen with segments of different perforations,
Fig 4 schematische Darstellung der Mühle in Seitenansicht bei Verwendung von verstellbaren Ablenkelementen, und Fig.5 schematische Ansicht eines Siebdetails mit verstellbaren Ablenkelement.Fig. 4 schematic representation of the mill in side view when using adjustable deflection elements, and 5 shows a schematic view of a sieve detail with an adjustable deflection element.
Die Schlagmühle in Fig.1 besteht aus einem Gehäuse 1 mit einem Einlaufstutzen 2 und einem Auslaufstutzen 3. Innerhalb des Gehäuses 1 befindet sich ein Rotor 4 mit den Schlagorganen 5. Der Rotor ist mit einem Sieb 6 umgeben, auf dessen Oberfläche 6a mehrere Ablenkelemente 7,9, vorzugsweise mit einem dreieckigen Querschnitt, angeordnet sind. Das Sieb 6 ist an seinem Umfang in Siebsegmente durch die Ablenkelemente 7,9 unterteilt, welche vom Sieb zum Rotor nach innen gerichtet sind und eine glatte Arbeitsfläche mit Neigung in Drehrichtung des Rotors aufweisen. Dabei liegt der Neigungswinkel (gegenüber dem Radius im Bereich 20 bis 80 Grad und der Abstand h zwischen den Enden der Schlagorgane 5 und den Ablenkelementen 7,9 nicht weniger als der Korndurchmesser des Aus- gangproduktes ist.The beater mill in FIG. 1 consists of a housing 1 with an inlet nozzle 2 and an outlet nozzle 3. Inside the housing 1 there is a rotor 4 with the beating elements 5. The rotor is surrounded by a sieve 6, on the surface 6a of which a plurality of deflection elements 7 , 9, preferably with a triangular cross section. The screen 6 is divided on its circumference into screen segments by the deflection elements 7, 9, which are directed inwards from the screen to the rotor and have a smooth working surface with an inclination in the direction of rotation of the rotor. The angle of inclination (in relation to the radius is in the range from 20 to 80 degrees and the distance h between the ends of the impact members 5 and the deflection elements 7, 9 is not less than the grain diameter of the starting product).
Fig.2, 2a zeigen eine radiale Ausführung der Ablenkelemente 9 mit Seitenkanten, welche zu der dem Sieb 6 bzw, dessen Oberfläche 6a ein nach innen gerichtetes dreieckiges Prisma bilden.2, 2a show a radial design of the deflection elements 9 with side edges, which form an inwardly triangular prism with respect to the screen 6 or its surface 6a.
Fig.3 zeigt das Sieb 6, welches in Segmente A und B mit unterschiedlicher Lochung abwechselnd unterteilt ist, wobei die dreieckigen Prismen die Segmente der gleichen Lochung abdecken.3 shows the screen 6, which is alternately divided into segments A and B with different perforations, the triangular prisms covering the segments of the same perforation.
Fig.4 zeigt eine verstellbare Anordnung der Ablenkelemente 7 und Fig.5 die Drehrichtungen des Ablenkelementes 7 zu und von dem Sieb 6 um einen an der Sieboberfläche 6a angeordneten Drehpunkt 80. Die Drehrichtung des Rotors 4 kann sowohl in als auch entgegengesetzt zum Uhrzeigersinn erfolgen.4 shows an adjustable arrangement of the deflecting elements 7 and FIG. 5 shows the directions of rotation of the deflecting element 7 to and from the sieve 6 around a pivot point 80 arranged on the sieve surface 6a. The direction of rotation of the rotor 4 can take place both clockwise and counterclockwise.
Die Ablenkelemente 7,9 sind entlang dem Umfang des Siebes 6 in einem Ring 10 verschiebbar, vgl. insbesondere Fig.2a, angeordnet. Die Mühle arbeitet folgenderweiseThe deflection elements 7, 9 can be displaced in a ring 10 along the circumference of the sieve 6, cf. in particular Fig.2a arranged. The mill works as follows
Das Ausgangsprodukt (unzerkleinertes Getreide) wird über den Einlaufstutzen 2 in Fig 1 von zwei Seiten dem Rotor 4 zugeführt und gelangt unter Einwirkung der Zentrifugalkräfte Z auf der gekrümmten Rotorbahn auf die Sieboberflache 6a bzw auf eine Siebsektion S (siehe Fig. 2 ), welche durch zwei nacheinanderfolgende Ablenkelemente 7 bzw. 9 begrenzt ist. Dabei ist darauf hinzuweisen, dass das Ausgangsprodukt innerhalb des Rotors 4 der teilweisen Zerkleinerung unter der Einwirkung der Schlagorgane 5 ausgesetzt ist Wahrend seiner Bewegung entlang des Siebes 6 in Fig 4 kommt das Produkt auf die glatte geneigte Oberflache des Ablenkelementes 7, wechselt seine Bewegungsrichtung und gelangt so unter einen einzelnen Schlag des Schlagorgans 5 des Rotors 4 Beim Aufprall des Produktes auf das Schlagorgan 5 wird es in Teilchen verschiedener Grosse aufgelost welche unter Einwirkung der Tragheitskrafte, die ihnen beim Schlag erteilt werden, auf die nächste Siebsektion S eintreffen, welche dem Ablenkelement 7 in derThe starting product (uncrushed grain) is fed to the rotor 4 from two sides via the inlet connection 2 in FIG. 1 and, under the action of the centrifugal forces Z on the curved rotor path, reaches the sieve surface 6a or a sieving section S (see FIG. 2), which passes through two successive deflection elements 7 and 9 is limited. It should be noted that the starting product within the rotor 4 is subjected to partial comminution under the action of the striking elements 5. During its movement along the sieve 6 in FIG. 4, the product comes onto the smooth, inclined surface of the deflection element 7, changes its direction of movement and arrives so under a single stroke of the striking element 5 of the rotor 4 When the product impacts the striking element 5, it is broken down into particles of different sizes which, under the action of the inertial forces which are given to them during the stroke, arrive at the next sieving section S which the deflecting element 7 in the
Drehrichtung des Rotors 4 folgt Wahrend der Bewegung entlang der Sieboberfla- che 6a unter der Einwirkung der Zentrifugalkräfte und des Luftstroms, der durch den Rotor erzeugt wird, erfolgt die Trennung des Produktes nach Grosse Teilchen, welche die Lochung des Siebes 6 passiert haben, werden über den Aus- laufstutzen 3 aus der Schlagmühle als Ausgangsprodukt (Fertigprodukt) abtransportiert Die gröberen Teilchen und eine bestimmte Anzahl kleiner Teilchen welche keine Zeit hatten das Sieb zu passieren, gelangen auf das nächste Ablenkelement 7 das in der Bewegungsrichtung des Produktes liegtDirection of rotation of the rotor 4 follows. During the movement along the sieve surface 6a under the influence of the centrifugal forces and the air flow generated by the rotor, the product is separated into large particles which have passed through the perforation of the sieve 6 are over the discharge nozzle 3 is removed from the impact mill as the starting product (finished product). The coarser particles and a certain number of small particles which have not had time to pass through the sieve reach the next deflecting element 7 which lies in the direction of movement of the product
Weiter folgt ein ähnliches, wie oben beschriebener Prozess, jedoch mit dem Unterschied, dass entlang der Flache des Ablenkelementes 7, 9 sich ein Produktstrom bewegt, der aus Teilchen verschiedener Grosse besteht, Grobe Teilchen, die einen grossen Vorrat an kinetischer Energie aufweisen, verlassen die Oberflache unter einem Winkel im Bereich von 20 bis 80 Grad zum Radius und treffen im freien Flug auf einen einzigen Aufschlag des Rotors 4 Die Feinteile, welche über weniger Energie verfugen umkurven des Ablenkelement 7.9 und gelangen so ohne Schlageinwirkung zui nächsten Siebsektion S Dabei gelangen die kleinen Teilchen unmittelbar hinter dem Ablenkelement 7,9 zur Sieboberflache 6a wahrend grossere Teilchen weiter hinten in Drehrichtung auf diese eintreffen Auf diese Weise machen die Feinteilchen einen grosseren Weg entlang der Sieboberfla- che 6a bis zur nächsten Bewegung mit dem Ablenkelement 7,9, d h die Wahr- schemlichkeit erhöht sich, dass sie die Lochung des Siebes passieren Gleichzeitig haben die gröberen Teilchen nur einen kurzen Kontakt mit der Sieboberflache 6a, was zur Reduktion seiner Abnutzung beitragtNext follows a similar process as described above, but with the difference that a product stream consisting of particles of different sizes moves along the surface of the deflecting element 7, 9. Coarse particles which have a large supply of kinetic energy leave them Surface at an angle in the range of 20 to 80 degrees to the radius and hit a single impact of the rotor in free flight 4 The fine parts, which have less energy, curve around the deflecting element 7.9 and thus reach the next sieve section S without impact Particles directly behind the deflecting element 7, 9 to the screen surface 6 a, while larger particles arrive further back in the direction of rotation in this way. In this way, the fine particles make a larger path along the screen surface 6 a to the next movement with the deflecting element 7, 9, ie the true - Schematic increases that they pass through the perforation of the sieve At the same time, the coarser particles have only a short contact with the sieve surface 6a, which contributes to the reduction of its wear
Jede folgende Produktforderung zur Zerkleinerung mit Hilfe der Ablenkelemente 7,9 unterscheidet sich von der vorhergehenden nun dadurch, dass die Produktmenge standig abnimmt, weil die Teilchen erforderlicher Grosse laufend durch die Lochung des Siebes 6 entfernt werdenEach subsequent product requirement for comminution with the aid of the deflecting elements 7, 9 differs from the previous one in that the amount of product decreases continuously because the particles of the required size are continuously removed through the perforation of the sieve 6
Das Verfahren zur Zerkleinerung von Schuttgutem beruht auf folgenden Pπnzipi- enThe process for crushing debris is based on the following principles
1 Vorzerkleinerung des Ausgangsproduktes (ganzer Getreidekorner), welches dem Innenraum des Rotors 4 zugeführt wird und seine gleichzeitige Beschleunigung bis zu einer bestimmten Geschwindigkeit,1 pre-shredding of the starting product (whole grain), which is fed to the interior of the rotor 4 and its simultaneous acceleration up to a certain speed,
2 Weiterleitung des vorzerkleinerten Produktes unter einem bestimmten Winkel und mit vorgegebener Geschwindigkeit auf das Sieb 6,2 forwarding of the pre-shredded product at a certain angle and at a predetermined speed to the sieve 6,
3 Produktbewegung entlang des Siebes 6 bzw , Sieboberflache 6a, welche den Rotor 4 umschhesst, mit gleichzeitiger Trennung der Feinfraktion und der Zufuhrung der ungenügend zerkleinerten Fraktion unter Einwirkung der geneigten Ablenkelemente 7, welche am Sieb 6 angeordnet sind, zum weiteren Schlag durch die Schlagorgane 5,3 Product movement along the sieve 6 or sieve surface 6a, which surrounds the rotor 4, with simultaneous separation of the fine fraction and the supply of the insufficiently comminuted fraction under the action of the inclined deflection elements 7, which are arranged on the sieve 6, for further impact by the striking elements 5 ,
4 mehrmalige Wiederholung des Zufuhrzykluses der noch zu wenig zerkleinerten Fraktion zum Rotor 4, ihre Zerkleinerung und Weiterleitung zur Sieboberflache Ausserdem beruht das Zerkleinerungsprinzip der Schlagmühle auf der Zerkleinerung ohne unmittelbares Zusammenwirken von Rotor 4 und Sieb 5, was sich in Reduktion des Energieverbrauches und in Erhöhung der Lebensdauer der Schlagorgane aussert.4 Repeat the feed cycle of the fraction which has not yet been comminuted sufficiently to the rotor 4, its comminution and forwarding to the sieve surface In addition, the crushing principle of the impact mill is based on the crushing without direct interaction of the rotor 4 and sieve 5, which manifests itself in a reduction in energy consumption and in an increase in the life of the impact organs.
Es wird darauf hingewiesen, dass die gelochte Oberflache der Kammer vom Rotor um den Abstand entfernt ist, welcher notwendig ist um zu verhindern, dass der Rotor auf das vorbeiziehende Produkt Schläge ausüben kannIt should be noted that the perforated surface of the chamber is spaced from the rotor by the distance necessary to prevent the rotor from striking the product as it passes
Der Prozess hat den besten Wirkungsgrad, wenn die Produktzufuhr zum Rotor unter einem bestimmten Winkel erfolgt. Dieser Winkel muss zum Radius im Bereich von 20 bis 80 Grad liegen. The process has the best efficiency if the product is fed to the rotor at a certain angle. This angle to the radius must be in the range of 20 to 80 degrees.
BezuqszeichenverzeichnisReference directory
1 Gehäuse1 housing
2,3 Einlauf- und Auslaufstutzen 4 Rotor2.3 inlet and outlet nozzle 4 rotor
5 Schlagorgane5 striking organs
6 Sieb6 sieve
6a Sieboberfläche6a screen surface
7,9 Ablenkelemente 8 Motor7.9 deflection elements 8 motor
10 Ring am Umfang des Siebes10 ring on the circumference of the sieve
80 Drehpunkt des Ablenkelementes zur Sieboberfläche80 pivot point of the deflection element to the screen surface
A ArbeitszoneA work zone
G zerkleinertes Gut h Abstand zwischen den Ablenkelementen und den Schlagorganen des RotorsG shredded material h distance between the deflection elements and the striking elements of the rotor
S Siebsektionen α Neigungswinkel des Ablenkelementes gegenüber dem RadiusS sieve sections α angle of inclination of the deflection element with respect to the radius
P1 ,P2 Doppelpfeile, zeigen die Ablenkung des Materials zu und von den SchlagorganenP1, P2 double arrows indicate the deflection of the material to and from the percussion organs
Z Zentrifugalkräfte ß Winkel, welcher die Produktzufuhr zum Rotor bestimmt Z centrifugal forces ß angle, which determines the product feed to the rotor

Claims

Patentansprüche claims
1. Vorrichtung zur Zerkleinerung von Schüttgütern mit einem Gehäuse (1 ) mit Einlauf- und Auslaufstutzen (2, 3), mit einem Rotor (4), welcher am ganzen1. Device for comminuting bulk goods with a housing (1) with inlet and outlet connections (2, 3), with a rotor (4), which is on the whole
Umfang oder nur teilweise von einem Sieb (4) umgeben ist, dadurch gekennzeichnet, die Ablenkelemente (7,9) am Sieb angeordnet sind.Is circumferentially or only partially surrounded by a sieve (4), characterized in that the deflecting elements (7, 9) are arranged on the sieve.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Ab- lenkelemente (7) drehbar gegenüber dem Radius angeordnet sind.2. Device according to claim 1, characterized in that the deflection elements (7) are arranged rotatably with respect to the radius.
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Ablenkelemente (7) um einen Drehpunkt (80) an der Sieboberfläche (6a) in Richtung der Sieboberfläche und in Gegenrichtung drehbar sind.3. Device according to claim 2, characterized in that the deflecting elements (7) are rotatable about a pivot point (80) on the screen surface (6a) in the direction of the screen surface and in the opposite direction.
4. Vorrichtung nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, dass die Ablenkelemente (7) eine glatte Arbeitsfläche mit Neigungswinkel α im Bereich 20-80 Grad zum Radius aufweisen.4. Device according to one of claims 2 or 3, characterized in that the deflecting elements (7) have a smooth working surface with angle of inclination α in the range 20-80 degrees to the radius.
5. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Ab- lenkeiemente (9) radial angeordnet sind und ein dreieckiges Prisma bilden, dessen seitlichen Kanten zum Sieb (6) gerichtet sind.5. The device according to claim 1, characterized in that the deflection elements (9) are arranged radially and form a triangular prism, the lateral edges of which are directed towards the sieve (6).
6. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch ge- kennzeichnet, dass der Abstand zwischen den Ablenkelementen (7, 9) und den6. Device according to one of the preceding claims, characterized in that the distance between the deflection elements (7, 9) and the
Schlagorganen (5) des Rotors (4) den Durchmesser der Körnung des Ausgangsproduktes nicht überschreitet.Impact organs (5) of the rotor (4) do not exceed the diameter of the grain of the starting product.
7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeich- net, dass die Ablenkelemente (7, 9) verschiebbar entlang dem Siebumfang (6) angeordnet sind. 8 Vorrichtung nach Anspruch 1 , 5 oder 7, dadurch gekennzeichnet, dass das Sieb (6) Segmente mit unterschiedlicher Lochung aufweist7. Device according to one of claims 1 to 6, characterized in that the deflection elements (7, 9) are arranged displaceably along the screen circumference (6). 8 Device according to claim 1, 5 or 7, characterized in that the sieve (6) has segments with different perforations
9 Vorrichtung nach Anspruch 5, 7 und 8, dadurch gekennzeichnet, dass die dreieckigen Prismen jeweils mit ihren Seitenkanten die Segmente mit identischer Lochung abdecken9 Device according to claim 5, 7 and 8, characterized in that the triangular prisms each cover the segments with identical perforations with their side edges
10 Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die Ab- lenkelemente (7, 9) entlang einem Ring (10) am Umfang der Sieboberflache (6a) verschiebbar sind10. The device according to claim 7, characterized in that the deflection elements (7, 9) can be displaced along a ring (10) on the circumference of the sieve surface (6a)
1 1 Schlag- und Ablenkmuhle nach einem der vorhergehenden Ansprüche1 1 impact and deflection mill according to one of the preceding claims
12 Verfahren zur Zerkleinerung von Schüttgütern gekennzeichnet durch12 Processes for comminuting bulk goods characterized by
a) Zufuhrung des vorzerkleinerten Produktes unter einem bestimmten Winkel ß und mit vorgegebenen Geschwindigkeit auf das Sieb (6)a) feeding the pre-shredded product onto the sieve (6) at a certain angle β and at a predetermined speed
b) Produktbewegung entlang des Siebes mit gleichzeitiger Trennung der Feinfrak tion und der Zufuhrung der ungenügend zerkleinerten Fraktion unter Einwirkung der Ablenkelemente (7, 9) zum weiteren Schlag auf die Schlagorgane (5)b) product movement along the sieve with simultaneous separation of the fine fraction and the supply of the insufficiently comminuted fraction under the action of the deflecting elements (7, 9) for a further blow to the impact organs (5)
c) mehrmalige Wiederholung des Zufuhrzyklusses der noch zu wenig zerkleiner- ten Fraktion zum Rotor (4), ihre Zerkleinerung und Weiterleitung zur Sieboberfla- cne (6a)c) repeated repetition of the feed cycle of the fraction which has not yet been comminuted sufficiently to the rotor (4), its comminution and forwarding to the sieve surface (6a)
13 Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass der Winkel ß im Bereich 20-80 Grad zum Radius variieren kann 13. The method according to claim 12, characterized in that the angle β can vary in the range 20-80 degrees to the radius
EP98902931A 1997-03-07 1998-02-26 Method and device for fragmenting bulk materials Expired - Lifetime EP0964748B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19709345 1997-03-07
DE19709345A DE19709345A1 (en) 1997-03-07 1997-03-07 Method and device for comminuting bulk goods
PCT/CH1998/000080 WO1998040163A1 (en) 1997-03-07 1998-02-26 Method and device for fragmenting bulk materials

Publications (2)

Publication Number Publication Date
EP0964748A1 true EP0964748A1 (en) 1999-12-22
EP0964748B1 EP0964748B1 (en) 2002-09-18

Family

ID=7822549

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98902931A Expired - Lifetime EP0964748B1 (en) 1997-03-07 1998-02-26 Method and device for fragmenting bulk materials

Country Status (13)

Country Link
EP (1) EP0964748B1 (en)
KR (1) KR100501712B1 (en)
CN (1) CN1163304C (en)
AT (1) ATE224234T1 (en)
AU (1) AU5980198A (en)
DE (2) DE19709345A1 (en)
DK (1) DK0964748T3 (en)
ES (1) ES2181161T3 (en)
NO (1) NO994320L (en)
RU (1) RU2224595C2 (en)
TR (1) TR199901748T2 (en)
UA (1) UA66782C2 (en)
WO (1) WO1998040163A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4289013B2 (en) * 2003-05-13 2009-07-01 株式会社サタケ Grain impact crusher
DE202009011011U1 (en) * 2009-09-16 2011-02-10 Th. Buschhoff Gmbh & Co. hammer mill
EA026359B1 (en) * 2012-12-04 2017-03-31 Республиканское Унитарное Предприятие "Научно-Практический Центр Национальной Академии Наук Беларуси По Механизации Сельского Хозяйства" (Руп "Нпц Нан Беларуси По Механизации Сельского Хозяйства") Vertical grain grinder
RU2568754C2 (en) * 2013-12-04 2015-11-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Оренбургский государственный аграрный университет" Grain grinder

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1250721B (en) * 1967-09-21
US2225095A (en) * 1939-04-27 1940-12-17 Claud Mcclellan Screen for hammer mills
DE889108C (en) * 1939-09-05 1953-09-07 Josef Klagsbrunn Centrifugal mill
DE718381C (en) * 1941-01-14 1942-03-10 L & C Steinmueller Schlaegermuehle
US2465056A (en) * 1945-03-22 1949-03-22 Auraldo W Bond Mill screen with auxiliary perforate baffles on operating face
US2488714A (en) * 1945-10-01 1949-11-22 Grayce A Delp Adjustable screen for hammer mills
US2543599A (en) * 1946-04-06 1951-02-27 Rietz Mfg Co Screen structure for hammer mills
FR2598100B1 (en) * 1986-05-02 1988-07-29 Copex DEVICE FOR EJECTING IMBROYABLE MATERIALS AND VARIING THE YIELD OF A HAMMER CRUSHER FOR THE TREATMENT OF SCRAP
US4907750A (en) * 1988-03-09 1990-03-13 Prater Industries, Inc. Hammermill
FR2715330B1 (en) * 1994-01-25 1996-03-29 Andre Bonnet Multiple vane crusher with each fixed grinding element followed individually by an air classification.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9840163A1 *

Also Published As

Publication number Publication date
NO994320D0 (en) 1999-09-06
DK0964748T3 (en) 2003-01-27
DE59805608D1 (en) 2002-10-24
EP0964748B1 (en) 2002-09-18
RU2224595C2 (en) 2004-02-27
NO994320L (en) 1999-11-03
TR199901748T2 (en) 2000-03-21
KR20000070365A (en) 2000-11-25
WO1998040163A1 (en) 1998-09-17
CN1163304C (en) 2004-08-25
DE19709345A1 (en) 1998-09-10
UA66782C2 (en) 2004-06-15
KR100501712B1 (en) 2005-07-18
ES2181161T3 (en) 2003-02-16
CN1246080A (en) 2000-03-01
ATE224234T1 (en) 2002-10-15
AU5980198A (en) 1998-09-29

Similar Documents

Publication Publication Date Title
DE3145209C2 (en)
DE1507697A1 (en) Method and device for rotary processing and sorting
DE3823380C2 (en) Sifter for sifting granular, especially agglomerated goods
DE3342765A1 (en) CRUSHING DEVICE, IN PARTICULAR FOR HARD GRAINED SHELLS
EP0237641B1 (en) Comminuting plant for brittle material
EP0964748B1 (en) Method and device for fragmenting bulk materials
DE102017103956A1 (en) baffle reactor
DE2620797C2 (en) Beater mill for processing fiber-containing products
EP0764470B1 (en) Process for impact milling and impact mill
EP0692309B1 (en) Process for impactmilling and impactmill
DE102011117418B4 (en) labyrinth mill
DE3203324C2 (en) Centrifugal mill
DE4431534B4 (en) Machine for acting on comminuted and classifiable raw material, as well as method for operating the machine
DE1607642A1 (en) Method and device for separating a coarse fraction from a pneumatically conveyed bulk material flow
DE1288888B (en) Device for grinding lumpy goods
DE3590172C2 (en)
DE2554853C2 (en) Method for operating a sieve drum crusher
EP1886729B1 (en) Comminution device and comminuting method
DE202010008197U1 (en) Centrifugal jet mill
DE2263723C3 (en) Beater mill
WO1996001694A1 (en) Spiral jet mill
DD301737A9 (en) METHOD FOR FINE-SEALING AND DEVICE FOR CARRYING OUT THE PROCESS
DE930057C (en) Centrifugal mill
EP2155395B1 (en) Impact mill
DE1909241C (en) Method and device for shredding cellulose materials

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

17P Request for examination filed

Effective date: 19990609

AK Designated contracting states

Kind code of ref document: A1

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

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 20011228

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

REF Corresponds to:

Ref document number: 224234

Country of ref document: AT

Date of ref document: 20021015

Kind code of ref document: T

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20020918

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: BUEHLER AG PATENTABTEILUNG

REF Corresponds to:

Ref document number: 59805608

Country of ref document: DE

Date of ref document: 20021024

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

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20021219

ET Fr: translation filed
REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2181161

Country of ref document: ES

Kind code of ref document: T3

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

Effective date: 20030619

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

Ref country code: GB

Payment date: 20070105

Year of fee payment: 10

Ref country code: AT

Payment date: 20070105

Year of fee payment: 10

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

Ref country code: NL

Payment date: 20070108

Year of fee payment: 10

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

Ref country code: DK

Payment date: 20070109

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: 20070205

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: 20070219

Year of fee payment: 10

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

Ref country code: DE

Payment date: 20070228

Year of fee payment: 10

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

Ref country code: BE

Payment date: 20070302

Year of fee payment: 10

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

Ref country code: IT

Payment date: 20070526

Year of fee payment: 10

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

Ref country code: FR

Payment date: 20070201

Year of fee payment: 10

Ref country code: CH

Payment date: 20080130

Year of fee payment: 11

BERE Be: lapsed

Owner name: *BUHLER A.G.

Effective date: 20080228

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20080226

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

Effective date: 20080901

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

Ref country code: NL

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

Effective date: 20080901

Ref country code: AT

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

Effective date: 20080226

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20081031

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: 20080227

Ref country code: DK

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

Effective date: 20080229

Ref country code: DE

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

Effective date: 20080902

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

Ref country code: BE

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

Effective date: 20080228

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: 20080229

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20080227

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: 20080226

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

Ref country code: ES

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

Effective date: 20080227

REG Reference to a national code

Ref country code: CH

Ref legal event code: PCAR

Free format text: BUEHLER AG PATENTABTEILUNG; ;9240 UZWIL (CH)

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

Effective date: 20080226

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: LI

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

Effective date: 20090228

Ref country code: CH

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

Effective date: 20090228