EP0642844A2 - Laboratory sieving device - Google Patents

Laboratory sieving device Download PDF

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Publication number
EP0642844A2
EP0642844A2 EP94114272A EP94114272A EP0642844A2 EP 0642844 A2 EP0642844 A2 EP 0642844A2 EP 94114272 A EP94114272 A EP 94114272A EP 94114272 A EP94114272 A EP 94114272A EP 0642844 A2 EP0642844 A2 EP 0642844A2
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EP
European Patent Office
Prior art keywords
housing
leaf springs
springs
screening machine
machine according
Prior art date
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Granted
Application number
EP94114272A
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German (de)
French (fr)
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EP0642844A3 (en
EP0642844B1 (en
Inventor
Harald Fischer
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F Kurt Retsch GmbH and Co KG
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F Kurt Retsch GmbH and Co KG
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Publication of EP0642844A2 publication Critical patent/EP0642844A2/en
Publication of EP0642844A3 publication Critical patent/EP0642844A3/en
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Publication of EP0642844B1 publication Critical patent/EP0642844B1/en
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    • 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
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • 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
    • B07B1/06—Cone or disc shaped screens
    • 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
    • B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens

Definitions

  • the invention relates to a sieving machine with a three-dimensional sieve movement with a sieve carrier having a horizontally oriented base plate for the at least one sieve bottom, wherein the sieve carrier, which is movably arranged in the vertical direction relative to the housing and is acted upon by an electromagnet as a drive, is supported against the housing via springs.
  • a generic screening machine is known from use according to the company brochure "Retsch-Labor Siebmaschine, VIBRO, 006/1985";
  • the screen carrier having a three-armed spider is supported with the spider arms on a spring arranged on the housing and movably arranged with respect to the housing, the springs being aligned in a substantially vertical arrangement with respect to the filter carrier and inclined in a tangential oblique position with respect to the vertical vertical axis of the screening machine .
  • An electromagnet arranged under the portafilter creates a vertical vibration level by acting on the spider of the portafilter, the vertical movement of the portafilter being converted into a three-dimensional movement of the sieve plates arranged on the portafilter via the movement along the axis of the inclined springs.
  • the sieving success achieved with the three-dimensional sieving movement can still be increased. It is therefore the object of the invention to provide a generic screening machine in which the screening success is further improved.
  • the springs are designed as leaf springs running in a plane that is essentially parallel to the base plate of the portafilter, the clamps of which on the housing on the one hand and on the portafilter on the other hand are each tilted in the same direction by an angular amount related to the horizontal baseplate plane, so that the respective spring surfaces of the leaf springs have a course correspondingly tilted about their longitudinal axis out of their course plane.
  • the basic orientation of the leaf springs in a plane parallel to the portafilter has the advantage that the vertical component of the sieve movement is thus increased compared to the prior art, because the portafilter held by the leaf springs acts on the leaf springs perpendicular to their longitudinal spring axis; With the help of the clamping of the leaf springs, which is tilted at its two ends about its longitudinal axis, the vertical vibration component of the portafilter is now overlaid with the desired further vibration component for generating a three-dimensional sieve movement. It has been found that the sieving success is significantly improved in the inventive design of the sieving machine; in addition, the screening machine is easy to manufacture and assemble with just a few individual parts.
  • the angular amount by which the leaf springs 18 are tilted about their longitudinal axis is one to five degrees.
  • the housing is pot-shaped with an edge encompassing the portafilter and having the housing-side fixtures for the leaf springs, the leaf springs being arranged in a star shape between the edge and the portafilter.
  • the filter holder has a clamping block which projects into the area enclosed by the edge of the pot-like housing and on which the leaf springs are clamped.
  • three or six leaf springs can be provided in a symmetrical arrangement; however, the invention can be implemented with any number of leaf springs which are to be aligned in a symmetrical arrangement.
  • the screening machine has a housing 10 which is fastened to a base plate 12 by screws 11, which base plate 12 has feet 13 by means of which the screening machine can be set up.
  • a cover 14 enclosing the housing 10 rises on the base plate 12, an actuator 15 and an electrical connection 15a being integrated in the cover 14, for example.
  • a cover 24 is seated on the upper sieve tray 23, and the collecting tray and sieve trays are braced against one another via a holder 25.
  • the filter holder 19 now extends through the upper part 14a of the cover 14 with a clamping block 20 into the part enclosed by the edge 16 of the housing 10, so that leaf springs 18 extending from the clamps 17 in the edge 16 of the housing 10 have their other end to hold in clamps 21 formed on the clamping block 20 are.
  • the leaf springs 18 are initially basically aligned in a plane parallel to the base plate of the portafilter 19;
  • the leaf springs 18, which are preferably designed as rectangular springs with a spring surface 18a, do not lie with their spring surface 18a parallel to the plane of the filter holder 19, rather the clamps 17, 21 are tilted in the same direction relative to the plane of the filter holder 19, so that the leaf springs 18 have a course in which their respective spring surface 18a is tilted out of this course plane about its longitudinal axis by an angular amount between 1 and 5 degrees from the course plane parallel to the filter holder 19.
  • the tilted arrangement of the plurality of star springs 18 arranged in a star shape is of course in the same direction in order to ensure the desired superimposition of the vertical vibration.
  • an electromagnet 26 is arranged, the upper edge of which extends into the vicinity of the clamping block 20 in such a way that the clamping block 20 can be set in motion with the electromagnet 26.

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  • Combined Means For Separation Of Solids (AREA)

Abstract

To improve the sieving result, in a sieving machine with a three-dimensional sieving motion, with a sieve carrier (19) for the at least one sieve tray (22), the sieve carrier arranged moveably relative to the housing (10) and loaded by an electromagnet (26) as a drive being supported relative to the housing by means of springs (18), provision is made for designing the springs as leaf springs (18) which extend in a plane parallel to the baseplate of the sieve carrier (19) and of which the clamping points (17, 21) on the housing (10, 16) on the one hand and on the sieve carrier (19, 20) on the other hand are arranged tilted by an angular amount in relation to the horizontal baseplate plane, so that the spring surfaces (18a) of the leaf springs (18) have a run which is correspondingly tilted out of their running plane about their longitudinal axis. <IMAGE>

Description

Die Erfindung betrifft eine Siebmaschine mit einer dreidimensionalen Siebbewegung mit einem eine horizontal ausgerichtete Grundplatte aufweisenden Siebträger für den wenigstens einen Siebboden, wobei der gegenüber dem Gehäuse in vertikaler Richtung beweglich angeordnete und von einem Elektromagneten als Antrieb beaufschlagte Siebträger über Federn gegen das Gehäuse abgestützt ist.The invention relates to a sieving machine with a three-dimensional sieve movement with a sieve carrier having a horizontally oriented base plate for the at least one sieve bottom, wherein the sieve carrier, which is movably arranged in the vertical direction relative to the housing and is acted upon by an electromagnet as a drive, is supported against the housing via springs.

Eine gattungsgemäße Siebmaschine ist durch Benutzung gemäß dem Firmenprospekt "Retsch-Labor Siebmaschine, VIBRO, 006/1985" bekannt; bei dieser Siebmaschine ist der eine dreiarmige Spinne aufweisende Siebträger mit den Spinnenarmen auf am Gehäuse angeordneten Feder abgestützt und gegenüber dem Gehäuse beweglich angeordnet, wobei die Federn in im wesentlichen vertikaler Anordnung zum Siebträger ausgerichtet und gegenüber der vertikalen Hochachse der Siebmaschine in eine tangentiale Schrägstellung geneigt sind. Ein unter dem Siebträger angeordneter Elektromagnet sorgt durch Einwirkung auf die Spinne des Siebträgers für die Erzeugung einer vertikalen Schwingungshöhe, wobei die Vertikalbewegung des Siebträgers über die Bewegung entlang der Achse der geneigt angeordneten Federn in eine dreidimensionale Bewegung der auf dem Siebträger angeordneten Siebböden umgesetzt wird.A generic screening machine is known from use according to the company brochure "Retsch-Labor Siebmaschine, VIBRO, 006/1985"; In this screening machine, the screen carrier having a three-armed spider is supported with the spider arms on a spring arranged on the housing and movably arranged with respect to the housing, the springs being aligned in a substantially vertical arrangement with respect to the filter carrier and inclined in a tangential oblique position with respect to the vertical vertical axis of the screening machine . An electromagnet arranged under the portafilter creates a vertical vibration level by acting on the spider of the portafilter, the vertical movement of the portafilter being converted into a three-dimensional movement of the sieve plates arranged on the portafilter via the movement along the axis of the inclined springs.

Bei der bekannten Siebmaschine ist der mit der dreidimensionalen Siebbewegung erreichte Sieberfolg noch zu steigern. Daher liegt der Erfindung die Aufgabe zugrunde, eine gattungsgemäße Siebmaschine zur Verfügung zu stellen, bei der der Sieberfolg weiter verbessert ist.In the known sieving machine, the sieving success achieved with the three-dimensional sieving movement can still be increased. It is therefore the object of the invention to provide a generic screening machine in which the screening success is further improved.

Die Lösung dieser Aufgabe ergibt sich einschließlich vorteilhafter Ausgestaltungen und Weiterbildungen der Erfindung aus dem Inhalt der Patentansprüche, welche dieser Beschreibung nachgestellt sind.This object is achieved, including advantageous refinements and developments of the invention, from the content of the patent claims, which follow this description.

Die Erfindung sieht in ihrem Grundgedanken vor, daß die Federn als in einer zur Grundplatte des Siebträgers im wesentlichen parallelen Ebene verlaufende Blattfedern ausgebildet sind, deren Einspannungen am Gehäuse einerseits und am Siebträger andererseits jeweils gleichsinnig um einen auf die horizontale Grundplattenebene bezogenen Winkelbetrag gekippt angeordnet sind, so daß die jeweiligen Federflächen der Blattfedern einen um ihre Längsachse aus ihrer Verlaufsebene heraus entsprechend gekippten Verlauf aufweisen. Mit der grundsätzlichen Ausrichtung der Blattfedern in einer zum Siebträger parallelen Ebene ist der Vorteil verbunden, daß damit die vertikale Komponente der Siebbewegung gegenüber dem Stand der Technik verstärkt ist, weil der durch die Blattfedern gehaltene Siebträger die Blattfedern senkrecht zu ihrer Längs-Federachse beaufschlagt; mit Hilfe der an ihren beiden Enden um ihre Längsachse gekippten Einspannung der Blattfedern wird der vertikalen Schwingungskomponente des Siebträgers nun die gewünschte weitere Schwingungskomponente zur Erzeugung einer dreidimensionalen Siebbewegung überlagert. Es hat sich herausgestellt, daß der Sieberfolg bei der erfindungsgemäßen Ausgestaltung der Siebmaschine deutlich verbessert ist; zudem ist die Siebmaschine einfach und mit wenigen Einzelteilen herzustellen beziehungsweise zu montieren.The basic idea of the invention provides that the springs are designed as leaf springs running in a plane that is essentially parallel to the base plate of the portafilter, the clamps of which on the housing on the one hand and on the portafilter on the other hand are each tilted in the same direction by an angular amount related to the horizontal baseplate plane, so that the respective spring surfaces of the leaf springs have a course correspondingly tilted about their longitudinal axis out of their course plane. The basic orientation of the leaf springs in a plane parallel to the portafilter has the advantage that the vertical component of the sieve movement is thus increased compared to the prior art, because the portafilter held by the leaf springs acts on the leaf springs perpendicular to their longitudinal spring axis; With the help of the clamping of the leaf springs, which is tilted at its two ends about its longitudinal axis, the vertical vibration component of the portafilter is now overlaid with the desired further vibration component for generating a three-dimensional sieve movement. It has been found that the sieving success is significantly improved in the inventive design of the sieving machine; in addition, the screening machine is easy to manufacture and assemble with just a few individual parts.

Nach einem Ausführungsbeispiel der Erfindung beträgt der Winkelbetrag, um den die Blattfedern 18 um ihre Längsachse gekippt sind, eins bis fünf Grad.According to one embodiment of the invention, the angular amount by which the leaf springs 18 are tilted about their longitudinal axis is one to five degrees.

Nach einem Ausführungsbeispiel der Erfindung ist das Gehäuse topfartig mit einem den Siebträger umgreifenden und die gehäuseseitigen Einspannungen für die Blattfedern aufweisenden Rand ausgebildet, wobei die Blattfedern in sternförmigem Verlauf zwischen dem Rand und dem Siebträger angeordnet sind. Damit ist eine besonders einfache Einspannungsmöglichkeit für den Siebträger gegenüber dem Gehäuse gegeben.According to one embodiment of the invention, the housing is pot-shaped with an edge encompassing the portafilter and having the housing-side fixtures for the leaf springs, the leaf springs being arranged in a star shape between the edge and the portafilter. This provides a particularly simple way of clamping the filter holder in relation to the housing.

Um insoweit die Gehäuseabmessungen nicht so groß werden zu lassen, kann nach einem Ausführungsbeispiel der Erfindung vorgesehen sein, daß der Siebträger einen in den von dem Rand des topfartigen Gehäuses umschlossenen Bereich hineinragenden Klemmblock aufweist, an welchem die Blattfedern eingespannt sind.In order to prevent the housing dimensions from becoming so large, it can be provided according to one embodiment of the invention that the filter holder has a clamping block which projects into the area enclosed by the edge of the pot-like housing and on which the leaf springs are clamped.

Nach Ausführungsbeispielen der Erfindung können in jeweils symmetrischer Anordnung drei oder sechs Blattfedern vorgesehen sein; die Erfindung läßt sich jedoch mit jeder beliebigen Anzahl von Blattfedern verwirklichen, die in jeweils symmetrischer Anordnung auszurichten sind.According to embodiments of the invention, three or six leaf springs can be provided in a symmetrical arrangement; however, the invention can be implemented with any number of leaf springs which are to be aligned in a symmetrical arrangement.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung wiedergegeben, welches nachstehend beschrieben ist. Es zeigen:

Fig. 1
eine Siebmaschine in Seitenansicht, teilweise geschnitten,
Fig. 2
eine Draufsicht auf den Siebträger und dessen Einspannung am Gehäuse,
Fig. 3
den Gegenstand der Figur 2 im Schnitt nach Linie A - B in Figur 2.
In the drawing, an embodiment of the invention is shown, which is described below. Show it:
Fig. 1
a screening machine in side view, partially cut,
Fig. 2
a plan view of the portafilter and its clamping on the housing,
Fig. 3
the object of Figure 2 in section along line A - B in Figure 2.

Die Siebmaschine hat ein Gehäuse 10, welches über Schrauben 11 an einem Bodenblech 12 befestigt ist, welches Bodenblech 12 über Füße 13 verfügt, mittels derer die Siebmaschine aufgestellt werden kann. Auf dem Bodenblech 12 erhebt sich eine das Gehäuse 10 umschließende Abdeckung 14, wobei in die Abdeckung 14 beispielsweise eine Betätigungseinrichtung 15 und ein elektrischer Anschluß 15a integriert sind.The screening machine has a housing 10 which is fastened to a base plate 12 by screws 11, which base plate 12 has feet 13 by means of which the screening machine can be set up. A cover 14 enclosing the housing 10 rises on the base plate 12, an actuator 15 and an electrical connection 15a being integrated in the cover 14, for example.

Am oberen Ende des topfartig ausgebildetenen Gehäuses 10 sitzt ein umlaufender Rand 16, in welchem Einspannungen 17 für radial sternförmig verlaufende Blattfedern 18 ausgebildet sind.At the upper end of the pot-shaped housing 10 there is a circumferential edge 16, in which clamps 17 for radially star-shaped leaf springs 18 are formed.

Über dem oberen Teil 14a der Abdeckung 14 erhebt sich eine über das Gehäuse 10 horizontal ausgerichtete Grundplatte als Siebträger 19, auf welchem ein Auffangboden 22 angeordnet ist, über dem sich bei dem dargestellten Ausführungsbeispiel zwei Siebböden 23 erheben. Auf dem oberen Siebboden 23 sitzt eine Abdeckung 24, und Auffangboden und Siebböden sind über eine Halterung 25 gegeneinander verspannt.Above the upper part 14a of the cover 14 rises a base plate horizontally aligned via the housing 10 as a sieve carrier 19, on which a collecting tray 22 is arranged, above which two sieve trays 23 rise in the exemplary embodiment shown. A cover 24 is seated on the upper sieve tray 23, and the collecting tray and sieve trays are braced against one another via a holder 25.

Der Siebträger 19 reicht nun durch den oberen Teil 14a der Abdeckung 14 hindurch mit einem Klemmblock 20 in den von dem Rand 16 des Gehäuses 10 umschlossenen Teil hinein, so daß von den Einspannungen 17 im Rand 16 des Gehäuses 10 ausgehende Blattfedern 18 mit ihrem anderen Ende in an dem Klemmblock 20 ausgebildeten Einspannungen 21 zu haltern sind. Damit sind die Blattfedern 18 zunächst grundsätzlich in einer zur Grundplatte des Siebträgers 19 parallelen Ebene ausgerichtet; die vorzugsweise als Rechteckfedern mit einer Federfläche 18a ausgebildeten Blattfedern 18 liegen mit ihrer Federfläche 18a nicht parallel zu der Ebene des Siebträgers 19, vielmehr sind die Einspannungen 17, 21 gegenüber der Ebene des Siebträgers 19 gleichsinnig um einen Winkelbetrag gekippt angeordnet, so daß die Blattfedern 18 einen Verlauf aufweisen, bei welchem ihre jeweilige Federfläche 18a gegenüber der zum Siebträger 19 parallelen Verlaufsebene um einen Winkelbetrag zwischen 1 und 5 Grad aus dieser Verlaufsebene heraus um ihre Längsachse gekippt ist. Die gekippte Anordnung der mehreren sternförmig angeordneten Blattfedern 18 ist dabei selbstverständlich gleichsinnig, um die gewünschte Überlagerung der vertikalen Schwingung sicherzustellen.The filter holder 19 now extends through the upper part 14a of the cover 14 with a clamping block 20 into the part enclosed by the edge 16 of the housing 10, so that leaf springs 18 extending from the clamps 17 in the edge 16 of the housing 10 have their other end to hold in clamps 21 formed on the clamping block 20 are. Thus, the leaf springs 18 are initially basically aligned in a plane parallel to the base plate of the portafilter 19; The leaf springs 18, which are preferably designed as rectangular springs with a spring surface 18a, do not lie with their spring surface 18a parallel to the plane of the filter holder 19, rather the clamps 17, 21 are tilted in the same direction relative to the plane of the filter holder 19, so that the leaf springs 18 have a course in which their respective spring surface 18a is tilted out of this course plane about its longitudinal axis by an angular amount between 1 and 5 degrees from the course plane parallel to the filter holder 19. The tilted arrangement of the plurality of star springs 18 arranged in a star shape is of course in the same direction in order to ensure the desired superimposition of the vertical vibration.

Im Inneren des topfartigen Gehäuses 10 ist ein Elektromagnet 26 angeordnet, der mit seiner Oberkante bis in die Nähe des Klemmblocks 20 derart reicht, daß der Klemmblock 20 mit dem Elektromagneten 26 in Schwingung versetzt werden kann.In the interior of the pot-like housing 10, an electromagnet 26 is arranged, the upper edge of which extends into the vicinity of the clamping block 20 in such a way that the clamping block 20 can be set in motion with the electromagnet 26.

Die in der vorstehenden Beschreibung, den Patentansprüchen, der Zusammenfassung und der Zeichnung offenbarten Merkmale des Gegenstandes dieser Unterlagen können einzeln als auch in beliebigen Kombinationen untereinander für die Verwirklichung der Erfindung in ihren verschiedenen Ausführungsformen wesentlich sein.The features of the subject matter of these documents disclosed in the above description, the patent claims, the abstract and the drawing can be essential individually or in any combination with one another for realizing the invention in its various embodiments.

Claims (6)

Siebmaschine mit einer dreidimensionalen Siebbewegung mit einem eine horizontal ausgerichtete Grundplatte aufweisenden Siebträger (19) für den wenigstens einen Siebboden (23), wobei der gegenüber dem Gehäuse (10) in vertikaler Richtung beweglich angeordnete und von einem Elektromagneten (26) als Antrieb beaufschlagte Siebträger (19) über Federn (18) gegen das Gehäuse (10) abgestützt ist, dadurch gekennzeichnet, daß die Federn als in einer zur Grundplatte des Siebträgers (19) parallelen Ebene verlaufende Blattfedern (18) ausgebildet sind, deren Einspannungen (17, 21) am Gehäuse (10, 16) einerseits und am Siebträger (19, 20) andererseits um einen auf die horizontale Grundplattenebene bezogenen Winkelbetrag gekippt angeordnet sind, so daß die Federflächen (18a) der Blattfedern (18) einen um ihre Längsachse aus ihrer Verlaufsebene heraus entsprechend gekippten Verlauf aufweisen.Screening machine with a three-dimensional screen movement with a screen support (19) having a horizontally aligned base plate for the at least one screen base (23), the screen support (11) being movably arranged in the vertical direction relative to the housing (10) and acted upon by an electromagnet (26) as a drive ( 19) is supported by springs (18) against the housing (10), characterized in that the springs are designed as leaf springs (18) extending in a plane parallel to the base plate of the filter holder (19), the clamps (17, 21) of which Housing (10, 16) on the one hand and on the portafilter (19, 20) on the other hand are arranged tilted by an angular amount related to the horizontal base plate plane, so that the spring surfaces (18a) of the leaf springs (18) tilt one correspondingly about their longitudinal axis out of their plane of travel Show course. Siebmaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Winkelbetrag eins bis fünf Grad beträgt.Screening machine according to claim 1, characterized in that the angular amount is one to five degrees. Siebmaschine nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß das Gehäuse (10) topfartig mit einem den Siebträger (19, 20) umgreifenden und die gehäuseseitigen Einspannungen (17) für die Blattfedern (18) aufnehmenden Rand (16) ausgebildet ist und daß die Blattfedern (18) in sternförmigen Verlauf zwischen dem Rand (16) und dem Siebträger (19, 20) angeordnet sind.Screening machine according to one of claims 1 or 2, characterized in that the housing (10) is pot-shaped with an edge (16) surrounding the screen support (19, 20) and the housing-side clamps (17) for the leaf springs (18) and that the leaf springs (18) are arranged in a star shape between the edge (16) and the filter holder (19, 20). Siebmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Siebträger einen in den vom Rand (16) des Gehäuses (10) umschlossenen Bereich hineinragenden Klemmblock (20) aufweist, an dem die Einspannungen (21) für die Blattfedern (18) angeordnet sind.Screening machine according to one of claims 1 to 3, characterized in that the screen support has a clamping block (20) which projects into the area enclosed by the edge (16) of the housing (10) and on which the clamps (21) for the leaf springs (18) are arranged. Siebmaschine nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß drei Blattfedern (18) in symmetrischer Anordnung vorgesehen sind.Screening machine according to one of claims 1 to 4, characterized in that three leaf springs (18) are provided in a symmetrical arrangement. Siebmaschine nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß sechs Blattfedern (18) in symmetrischer Anordnung vorgesehen sind.Screening machine according to one of claims 1 to 4, characterized in that six leaf springs (18) are provided in a symmetrical arrangement.
EP94114272A 1993-09-13 1994-09-10 Laboratory sieving device Expired - Lifetime EP0642844B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4331028 1993-09-13
DE4331028A DE4331028C1 (en) 1993-09-13 1993-09-13 Laboratory sieve machine

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EP0642844A2 true EP0642844A2 (en) 1995-03-15
EP0642844A3 EP0642844A3 (en) 1995-10-04
EP0642844B1 EP0642844B1 (en) 1998-04-08

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DE (2) DE4331028C1 (en)
ES (1) ES2117745T3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10134871A1 (en) * 2001-07-18 2003-02-06 Hte Ag The High Throughput Exp Screening device for classifying solids
CN107096715A (en) * 2017-06-19 2017-08-29 柳州三农科技有限公司 A kind of screening device for thinning for cereal
CN112474270A (en) * 2020-11-05 2021-03-12 江晓岚 Vibrating screen classifier is used in refractory material production

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106807626A (en) * 2015-12-02 2017-06-09 镇江市润州金山金属粉末厂 A kind of aluminum shot high-efficiency screening machine

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Publication number Priority date Publication date Assignee Title
NL96882C (en) * 1954-06-14 1900-01-01
DE4012902C1 (en) * 1990-04-23 1991-04-18 F. Kurt Retsch Gmbh & Co Kg, 5657 Haan, De

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL96882C (en) * 1954-06-14 1900-01-01
DE4012902C1 (en) * 1990-04-23 1991-04-18 F. Kurt Retsch Gmbh & Co Kg, 5657 Haan, De

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10134871A1 (en) * 2001-07-18 2003-02-06 Hte Ag The High Throughput Exp Screening device for classifying solids
DE10134871B4 (en) * 2001-07-18 2006-09-07 Hte Ag The High Throughput Experimentation Company Screening device for classifying solids and their use
US7147109B2 (en) 2001-07-18 2006-12-12 Hte Aktiengesellschaft The High Throughput Experimentation Company Sieve device for screening solid material
CN107096715A (en) * 2017-06-19 2017-08-29 柳州三农科技有限公司 A kind of screening device for thinning for cereal
CN112474270A (en) * 2020-11-05 2021-03-12 江晓岚 Vibrating screen classifier is used in refractory material production

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Publication number Publication date
EP0642844A3 (en) 1995-10-04
DE59405624D1 (en) 1998-05-14
ES2117745T3 (en) 1998-08-16
DE4331028C1 (en) 1995-03-23
EP0642844B1 (en) 1998-04-08

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