EP0663348B1 - Device for emptying a tubular bag - Google Patents

Device for emptying a tubular bag Download PDF

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Publication number
EP0663348B1
EP0663348B1 EP94119686A EP94119686A EP0663348B1 EP 0663348 B1 EP0663348 B1 EP 0663348B1 EP 94119686 A EP94119686 A EP 94119686A EP 94119686 A EP94119686 A EP 94119686A EP 0663348 B1 EP0663348 B1 EP 0663348B1
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EP
European Patent Office
Prior art keywords
cap
ring
housing
tubular bag
cartridge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94119686A
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German (de)
French (fr)
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EP0663348A1 (en
Inventor
Gerd Brandhorst
Wolf-Dietrich Herold
Ralf Heiduczek
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3M Deutschland GmbH
Original Assignee
Thera Patent GmbH and Co KG Gesellschaft fuer Industrielle Schutzrechte
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Application filed by Thera Patent GmbH and Co KG Gesellschaft fuer Industrielle Schutzrechte filed Critical Thera Patent GmbH and Co KG Gesellschaft fuer Industrielle Schutzrechte
Publication of EP0663348A1 publication Critical patent/EP0663348A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/01—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00583—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes the container for the material to be dispensed being deformable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/0055—Containers or packages provided with a flexible bag or a deformable membrane or diaphragm for expelling the contents
    • B65D83/0072—Containers or packages provided with a flexible bag or a deformable membrane or diaphragm for expelling the contents the contents of a flexible bag being expelled by a piston or a movable bottom or partition provided in the container or the package

Definitions

  • EP 0 541 972 A1 describes a device for emptying a tubular bag containing a flowable substance known, the tubular bag at its discharge end Ring with a conical sealing surface carries and the device a cylindrical housing to hold the tubular bag between a sliding piston and a cap having.
  • a discharge opening is provided in the cap, that of an annular contact surface for the conical Provide the sealing surface of the ring attached to the tubular bag is.
  • the Tubular bag in the cylindrical housing from its front or inserted the rear end, whereupon the front End of the case connected to the cap and into the back End of the piston is inserted.
  • the conical sealing surface the ring comes with the one in the cap Contact surface in contact, which is to ensure that the tubular bag cut off outside the ring Empty only through the opening in the cap can, but no material in the space between the cap, Tubular bag and housing. Since the sealing force from the Application pressure generated by the advance of the piston , it is automatically increased whenever the application pressure is high.
  • the tubular bag contains a relatively low viscosity Mass, such as a fresh catalyst, so there is Possibility of this even at low pressure on the piston begins to flow out before there is sufficient pressure between the sealing surfaces of the ring and cap are reached. In this Falling mass can even fall into the area between get the sealing surfaces and prevent any sufficient sealing is achieved.
  • a relatively low viscosity Mass such as a fresh catalyst
  • the seal described at the front end of the tubular bag is especially important when the tubular bag one of two or more components deployed simultaneously contains a mixture of materials to be produced.
  • the desired properties are achieved the finished mass to an exact mixing ratio; to is a complete application of the prescribed Amount of each component needed.
  • EP-A-0 319 666 is a device for emptying a Tubular bag known in the on the discharge end of the an annular tubular bag inserted into a housing End member attached, the housing closed with a cap and on a collar of the end member protruding through the cap a dispensing spout is screwed on. Because of these There is a seal between the collar and the discharge spout against the cap.
  • the invention has for its object a combination from a tubular bag and a device for emptying it specify, with the seal between the front end the tubular bag and the cap guaranteed even better than before is.
  • the inventive solution to this problem is in the claim 1 marked.
  • the ring is characterized by the fact that it deals with its Edge area against a support surface of the cap facing the Casing creates, automatically aligned, even if it is something cant should be glued to the tubular bag.
  • the embodiment of the invention according to claim 3 ensures that during the application process from the piston to the rear Exerted pressure also for the Sealing force between the ring and cap is used when the Tubular bag stuck inside the housing. That between housing and cap existing play allows in this case that the the bag itself is pressurized takes so far that the sealing force generates with certainty becomes.
  • the measure specified in claim 5 results due to the small contact area between ring and cap in a high sealing pressure.
  • the device consists of a cylindrical cartridge 1 which forms the housing mentioned above and in the claims, a substantially rigid cap 2 which can be plugged onto the front (lower in the drawing) end of the cartridge 1 and one into the rear end of the cartridge insertable and displaceable piston 3 .
  • the cartridge 1 is made from a section of a rigid cylindrical plastic tube with a constant inner diameter and has an end region 4 with a reduced outer diameter at the front, which forms the front end edge 5 of the cartridge 1 and an outer annular shoulder 6 .
  • the cap 2 has a hollow cylindrical end region 7 , which forms a rear end edge 8 and engages around the end region 4 of the cartridge 1 in the assembled state.
  • the cap 2 is penetrated by a discharge opening 9 , which begins at the rear end with a conical inlet 10 and ends in a spout 11 at the front.
  • the rear end of the inlet 10 forms an annular sealing edge 12 which is coaxial with the axis of the cartridge 1 (which in practice represents a narrow sealing surface).
  • a soft-flexible tubular bag 15 inserted into the cartridge 1 is shown, at the rear end of which a clip 16 closing it can be seen.
  • the tubular bag contains a more or less viscous mass, which can be a dental impression material in a typical application.
  • the piston 3 For receiving the part of the combined tubular bag located outside the clip 16 , the piston 3 has an axial recess 13 ; the piston 3 therefore presses against the rear end of the tubular bag 15 with a ring region 14 directed towards the front.
  • the tubular bag 15 carries a ring 17 which is glued to the tubular bag 15 with an edge pointing backwards.
  • the ring 17 has an outwardly projecting flange 18 , the edge region 19 of which has an outer diameter which exceeds the inner diameter of the cartridge 1 .
  • the ring 17 forms a conical sealing surface 20 that tapers towards the front.
  • a tubular bag 15 filled with a mass to be dispensed is inserted into the cartridge 1 from the front end until the edge region 19 of the ring flange 18 abuts the front edge 5 of the cartridge 1 .
  • the end of the tubular bag 15 projecting forward through the ring 17 which is designed similarly to its rear end, is cut off together with the clip also present at the front.
  • the cap 2 is then placed on the cartridge 1 , its end region 7 encompassing the end region 4 of the cartridge 1 , so that the sealing edge 12 formed by the inlet 10 touches the sealing surface 20 of the ring 17 .
  • the end regions 4 and 7 of cartridge 1 and cap 2 are dimensioned such that a joint remains between the shoulder 6 and the front edge 8 in the assembled state; Likewise, the front of the ring 17 and the rear of the cap 2 are designed and dimensioned such that an air space remains in front of the ring 17 outside the conical sealing surface 20 . This ensures that the cartridge 1 , the cap 2 and the ring 17 lie against one another in the manner described when the cap 2 is locked with the cartridge 1 .
  • the means for locking are not shown in the drawing; they can consist, for example, of inserting the cartridge 1 together with the cap 2 and tubular bag 15 into an appropriately designed device which has a drive for the piston 3 . Such a device is described in EP 0 492 413 A1.
  • the ring 17 should be glued to the tubular bag 15 in a tilted manner, it is automatically aligned in that the edge region 19 rests on the front edge 5 of the cartridge 1 . Furthermore, any radial offset of the ring 17 is compensated for by the inner surface of the end region 7 of the cap 2 .
  • the outer diameter of the ring flange 18 is only slightly smaller than the inner diameter of the end region 7 of the cap 2 , so that guidance is achieved.
  • tubular bag 15 cannot be pushed completely into the cartridge 1 due to a tolerance exceeded during manufacture or due to contamination, or if foreign bodies have been introduced in the vicinity of the sealing area, this prevents the cartridge 1 and cap 2 from locking and becomes thereby recognizable before the device is actually put into operation.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Coating Apparatus (AREA)
  • Packages (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Fluid-Damping Devices (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Refuse Receptacles (AREA)
  • Tubes (AREA)
  • Pipe Accessories (AREA)
  • Tires In General (AREA)
  • Closures For Containers (AREA)
  • Paper (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The device has a ring arranged on the open end of the tubular container (15). A cylindrical housing (1) is provided which encloses the container and has a cap (2) that has an outlet opening (9) and which surrounds and cooperates with the ring to seal the open end of the container. The housing has a piston (3) which slides within it to compress the container as desired. The ring (17) has an edge part (19) exceeding the size of the housing's (1) internal diameter for placing on a housing-support surface (5) facing the cap (2). One end part (4) of the housing, and a cylindrical end part (7) of the cap interlock, so that the ring's edge part leads from the inner wall of the outer one of the two end parts (4,7). The interlocking end parts of the housing and the cap leave a clearance between their facing surfaces (6,8). The ring has a conical sealing surface (20).

Description

Aus EP 0 541 972 A1 ist eine Vorrichtung zum Entleeren eines eine fließfähige Substanz enthaltenden Schlauchbeutels bekannt, wobei der Schlauchbeutel an seinem Ausbringende einen Ring mit einer konischen Dichtfläche trägt und die Vorrichtung ein zylindrisches Gehäuse zur Aufnahme des Schlauchbeutels zwischen einem verschiebbaren Kolben und einer Kappe aufweist. In der Kappe ist eine Ausbringöffnung vorgesehen, die von einer ringförmigen Anlagefläche für die konische Dichtfläche des an dem Schlauchbeutel angebrachten Rings versehen ist.EP 0 541 972 A1 describes a device for emptying a tubular bag containing a flowable substance known, the tubular bag at its discharge end Ring with a conical sealing surface carries and the device a cylindrical housing to hold the tubular bag between a sliding piston and a cap having. A discharge opening is provided in the cap, that of an annular contact surface for the conical Provide the sealing surface of the ring attached to the tubular bag is.

Zur Inbetriebnahme des bekannten Geräts wird der Schlauchbeutel in das zylindrische Gehäuse von dessen vorderem oder hinterem Ende her eingeschoben, woraufhin das vordere Ende des Gehäuses mit der Kappe verbunden und in das hintere Ende der Kolben eingeführt wird. Die konische Dichtfläche des Rings kommt dabei mit der in der Kappe vorhandenen Anlagefläche in Kontakt, wodurch sichergestellt werden soll, daß sich der außerhalb des Rings abgeschnittene Schlauchbeutel nur durch die Ausbringöffnung der Kappe nach außen entleeren kann, jedoch kein Material in den Raum zwischen Kappe, Schlauchbeutel und Gehäuse gelangt. Da die Dichtkraft aus dem durch den Vorschub des Kolbens erzeugten Ausbringdruck stammt, wird sie automatisch immer dann erhöht, wenn der Ausbringdruck hoch ist.To start up the known device, the Tubular bag in the cylindrical housing from its front or inserted the rear end, whereupon the front End of the case connected to the cap and into the back End of the piston is inserted. The conical sealing surface the ring comes with the one in the cap Contact surface in contact, which is to ensure that the tubular bag cut off outside the ring Empty only through the opening in the cap can, but no material in the space between the cap, Tubular bag and housing. Since the sealing force from the Application pressure generated by the advance of the piston , it is automatically increased whenever the application pressure is high.

Die ordnungsgemäße Arbeitsweise der bekannten Vorrichtung setzt voraus, daß der Ring an dem Schlauchbeutel in Radial- und Winkelrichtung ordnungsgemäß befestigt ist. Da der Schlauchbeutel aus einem Abschnitt eines Folienschlauches hergestellt und an seinen Enden lediglich zusammengequetscht und mit Clips verschlossen wird, lassen sich beim Befestigen des Rings mittels Klebstoff an dem gefalteten Beutelende Ungenauigkeiten nicht vermeiden. Daher kann es in der Praxis vorkommen, daß der Ring und damit auch seine konische Dichtfläche gegenüber der Achse der in der Kappe vorgesehenen Gegendichtfläche schräg und/oder exzentrisch sitzt. Dies kann dazu führen, daß keine vollständige Dichtung erzielt wird. The proper functioning of the known device assumes that the ring is properly attached to the tubular bag in the radial and angular directions. Since the Tubular bag from a section of a film tube made and just squeezed together at its ends and closed with clips, can be attached when fastening the ring with glue on the folded end of the bag inaccuracies do not avoid. Therefore, it can be in practice occur that the ring and thus its conical sealing surface against the axis of the counter-sealing surface provided in the cap sits obliquely and / or eccentrically. This can cause a full seal to not be achieved.

Enthält der Schlauchbeutel eine verhältnismäßig niederviskose Masse, etwa einen frischen Katalysator, so besteht die Möglichkeit, daß diese schon bei geringem Druck auf den Kolben auszuströmen beginnt, bevor ein ausreichender Druck zwischen den Dichtflächen von Ring und Kappe erreicht ist. In diesem Fall kann die austretende Masse selbst in den Bereich zwischen den Dichtflächen gelangen und verhindern, daß überhaupt eine ausreichende Dichtung erreicht wird.The tubular bag contains a relatively low viscosity Mass, such as a fresh catalyst, so there is Possibility of this even at low pressure on the piston begins to flow out before there is sufficient pressure between the sealing surfaces of the ring and cap are reached. In this Falling mass can even fall into the area between get the sealing surfaces and prevent any sufficient sealing is achieved.

In der Praxis kann es ferner passieren, daß der Außendurchmesser des Schlauchbeutels an der oberen Toleranzgrenze liegt oder daß die Außenfläche des Schlauchbeutels oder die Innenfläche des zylindrischen Gehäuses verschmutzt ist. Wird nun der Schlauchbeutel von hinten in das Gehäuse eingeführt, so verklemmt er sich möglicherweise und erreicht damit nicht seine vorderste Stellung, so daß die Dichtfläche des Rings die Gegenfläche der Kappe nicht erreicht. Das gleiche kann passieren, wenn der Schlauchbeutel von vorne her zu weit in das Gehäuse eingeschoben wird. Auch in diesen Fällen ist eine ordnungsgemäße Abdichtung nicht gewährleistet.In practice it can also happen that the outer diameter of the tubular bag at the upper tolerance limit lies or that the outer surface of the tubular bag or the inner surface the cylindrical housing is dirty. Now the tubular bag is inserted into the housing from behind, so he may get stuck and will not reach his foremost position so that the sealing surface of the ring is the counter surface the cap is not reached. The same thing can happen if the tubular bag is too far into the housing from the front is inserted. In these cases, too, is a proper one Sealing not guaranteed.

Die beschriebene Dichtung am vorderen Ende des Schlauchbeutels ist vor allem dann bedeutsam, wenn der Schlauchbeutel eine von zwei oder mehreren gleichzeitig ausgebrachten Komponenten eines herzustellenden Materialgemisches enthält. In diesem Fall kommt es zur Erzielung der gewünschten Eigenschaften der fertigen Masse auf ein genaues Mischungsverhältnis an; dazu ist ein vollständiges Ausbringen der jeweils vorgeschriebenen Menge jeder Komponente nötig.The seal described at the front end of the tubular bag is especially important when the tubular bag one of two or more components deployed simultaneously contains a mixture of materials to be produced. In this In this case, the desired properties are achieved the finished mass to an exact mixing ratio; to is a complete application of the prescribed Amount of each component needed.

Ein weiterer Grund für die Bedeutung der Dichtung besteht darin, daß bei Ausbringvorrichtungen der hier beschriebenen Art nur der Schlauchbeutel als Wegwerfteil gedacht ist, während Gehäuse und Kappe Teile einer wiederverwendbaren Vorrichtung sein sollen. Eine Verschmutzung des Gehäuseinnern und des hinteren Bereichs der Kappe würde diese Teile der Vorrichtung möglicherweise unbrauchbar machen.Another reason for the importance of the seal is there in that in the case of dispensing devices of the type described here only the tubular bag is intended as a disposable part, while housing and cap are parts of a reusable device should. Contamination of the inside of the housing and the rear Area of the cap would potentially be those parts of the device to make something useless.

Aus EP-A-0 319 666 ist eine Vorrichtung zum Entleeren eines Schlauchbeutels bekannt, bei der auf das Ausbringende des in ein Gehäuse eingelegten Schlauchbeutels ein ringförmiges Endglied aufgesetzt, das Gehäuse mit einer Kappe verschlossen und auf einen durch die Kappe hindurchragenden Bund des Endgliedes eine Ausbringtülle aufgeschraubt wird. Wegen dieser Verbindung von Bund und Ausbringtülle kommt es auf eine Abdichtung gegenüber der Kappe nicht an.From EP-A-0 319 666 is a device for emptying a Tubular bag known in the on the discharge end of the an annular tubular bag inserted into a housing End member attached, the housing closed with a cap and on a collar of the end member protruding through the cap a dispensing spout is screwed on. Because of these There is a seal between the collar and the discharge spout against the cap.

Der Erfindung liegt die Aufgabe zugrunde, eine Kombination aus einem Schlauchbeutel und einer Vorrichtung zu seiner Entleerung anzugeben, wobei die Dichtung zwischen dem vorderen Ende des Schlauchbeutels und der Kappe noch besser als bisher gewährleistet ist.The invention has for its object a combination from a tubular bag and a device for emptying it specify, with the seal between the front end the tubular bag and the cap guaranteed even better than before is.

Die erfindungsgemäße Lösung dieser Aufgabe ist im Anspruch 1 gekennzeichnet. Der danach vorgesehene, gegenüber dem Innendurchmesser des Gehäuses vergrößerte Ring bedingt, daß sich der Schlauchbeutel nur von der Ausbringseite her in das Gehäuse einschieben läßt. Werden anschließend Gehäuse und Kappe miteinander verriegelt, so ist automatisch gewährleistet, daß die an Ring und Kappe vorhandenen Dichtflächen einander erreichen und der Schlauchbeutel im Gehäuse nicht zu weit nach hinten gelangt; klemmt er andererseits und läßt er sich daher nicht vollständig einführen, so kann es höchstens passieren, daß sich Gehäuse und Kappe nicht mehr miteinander verriegeln lassen, was dann ohne weiteres feststellbar ist. The inventive solution to this problem is in the claim 1 marked. The one provided after that, compared to the inside diameter of the housing enlarged ring that the Tubular bags only from the discharge side into the housing can be inserted. Then the housing and cap are together locked, it is automatically ensured that the on Ring and cap existing sealing surfaces reach each other and the tubular bag in the housing does not get too far back; on the other hand, he sticks and therefore does not allow himself to be completely introduce, it can at most happen that Do not let the housing and cap lock together anymore, what is then easily ascertainable.

Ferner wird der Ring dadurch, daß er sich mit seinem Randbereich gegen eine der Kappe zugewandte Stützfläche des Gehäuses anlegt, automatisch ausgerichtet, auch wenn er etwas verkantet am Schlauchbeutel angeklebt sein sollte. Beim Verriegeln von Behälter und Kappe wird der Ring so eingespannt, daß einerseits die Dichtfläche gegen die in der Kappe vorgesehene ringförmige Anlage und andererseits der Randbereich des Rings gegen die Stützfläche des Gehäuses gedrückt wird.Furthermore, the ring is characterized by the fact that it deals with its Edge area against a support surface of the cap facing the Casing creates, automatically aligned, even if it is something cant should be glued to the tubular bag. When locking the ring and the cap are clamped in such a way that on the one hand the sealing surface against that provided in the cap annular system and on the other hand the edge area of the ring is pressed against the support surface of the housing.

Die Weiterbildung der Erfindung nach Anspruch 2 bringt den Vorteil mit sich, daß beim Zusammenstecken von Gehäuse und Kappe der Ring automatisch zentriert und damit die konische Dichtfläche des Rings genau auf die Gegenfläche der Kappe ausgerichtet wird.The development of the invention according to claim 2 brings the advantage that when you put the housing together and cap the ring automatically centered and thus the conical Sealing surface of the ring exactly on the counter surface of the Cap is aligned.

Die Ausgestaltung der Erfindung nach Anspruch 3 gewährleistet, daß der beim Ausbringvorgang vom Kolben auf das hintere Schlauchbeutelende ausgeübte Druck auch dann für die Dichtkraft zwischen Ring und Kappe ausgenutzt wird, wenn der Schlauchbeutel im Gehäuseinnern klemmt. Das zwischen Gehäuse und Kappe vorhandene Spiel läßt es in diesem Fall zu, daß der mit dem Druck beaufschlagte Schlauchbeutel das Gehäuse selbst so weit mitnimmt, daß die Dichtkraft mit Sicherheit erzeugt wird. The embodiment of the invention according to claim 3 ensures that during the application process from the piston to the rear Exerted pressure also for the Sealing force between the ring and cap is used when the Tubular bag stuck inside the housing. That between housing and cap existing play allows in this case that the the bag itself is pressurized takes so far that the sealing force generates with certainty becomes.

Die in Anspruch 5 angegebene Maßnahme resultiert aufgrund der geringen Kontaktfläche zwischen Ring und Kappe in einem hohen Dichtungsdruck.The measure specified in claim 5 results due to the small contact area between ring and cap in a high sealing pressure.

Ein bevorzugtes Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung näher erläutert, die einen Längsschnitt durch eine Entleerungsvorrichtung mit eingelegtem Schlauchbeutel zeigt.A preferred embodiment of the invention explained below with reference to the drawing, the one Longitudinal section through an emptying device with inserted Tubular bag shows.

Gemäß der Zeichnung besteht die Vorrichtung aus einer zylindrischen Kartusche 1, die das oben und in den Ansprüchen genannte Gehäuse bildet, einer auf das vordere (in der Zeichnung untere) Ende der Kartusche 1 aufsteckbaren, im wesentlichen starren Kappe 2 und einem in das hintere Kartuschenende einführbaren und darin verschiebbaren Kolben 3. Die Kartusche 1 ist aus einem Abschnitt eines steifen zylindrischen Kunststoffrohrs mit durchgehend gleichbleibendem Innendurchmesser gefertigt und weist vorne einen Endbereich 4 mit verringertem Außendurchmesser auf, der die vordere Stirnkante 5 der Kartusche 1 und eine äußere ringförmige Schulter 6 bildet.According to the drawing, the device consists of a cylindrical cartridge 1 which forms the housing mentioned above and in the claims, a substantially rigid cap 2 which can be plugged onto the front (lower in the drawing) end of the cartridge 1 and one into the rear end of the cartridge insertable and displaceable piston 3 . The cartridge 1 is made from a section of a rigid cylindrical plastic tube with a constant inner diameter and has an end region 4 with a reduced outer diameter at the front, which forms the front end edge 5 of the cartridge 1 and an outer annular shoulder 6 .

Die Kappe 2 weist einen hohlzylindrischen Endbereich 7 auf, der eine hintere Stirnkante 8 bildet und den Endbereich 4 der Kartusche 1 im zusammengesteckten Zustand umgreift. Die Kappe 2 wird von einer Ausbringöffnung 9 durchsetzt, die am hinteren Ende mit einem konusförmigen Einlaß 10 beginnt und vorne in einer Tülle 11 endet. Das hintere Ende des Einlasses 10 bildet eine ringförmige, zur Achse der Kartusche 1 koaxiale Dichtkante 12 (die in der Praxis eine schmale Dichtfläche darstellt).The cap 2 has a hollow cylindrical end region 7 , which forms a rear end edge 8 and engages around the end region 4 of the cartridge 1 in the assembled state. The cap 2 is penetrated by a discharge opening 9 , which begins at the rear end with a conical inlet 10 and ends in a spout 11 at the front. The rear end of the inlet 10 forms an annular sealing edge 12 which is coaxial with the axis of the cartridge 1 (which in practice represents a narrow sealing surface).

In der Zeichnung ist ein in der Kartusche 1 eingelegter weich-flexibler Schlauchbeutel 15 dargestellt, an dessen hinterem Ende ein ihn verschließender Clip 16 zu sehen ist. Der Schlauchbeutel enthält eine mehr oder weniger viskose Masse, bei der es sich in einem typischen Anwendungsfall um eine dentale Abformmasse handeln kann. Zur Aufnahme des außerhalb des Clips 16 gelegenen Teils des zusammengefaßten Schlauchbeutels weist der Kolben 3 eine axiale Vertiefung 13 auf; der Kolben 3 drückt daher mit einem nach vorne gerichteten Ringbereich 14 gegen das hintere Ende des Schlauchbeutels 15.In the drawing, a soft-flexible tubular bag 15 inserted into the cartridge 1 is shown, at the rear end of which a clip 16 closing it can be seen. The tubular bag contains a more or less viscous mass, which can be a dental impression material in a typical application. For receiving the part of the combined tubular bag located outside the clip 16 , the piston 3 has an axial recess 13 ; the piston 3 therefore presses against the rear end of the tubular bag 15 with a ring region 14 directed towards the front.

In der Zeichnung ist das hintere Ende des Schlauchbeutels 15 bereits etwas zusammengedrückt, der Kolben 3 jedoch nach hinten zurückgezogen gezeigt. Diese Darstellungsweise zeigt insoweit keinen tatsächlichen Betriebszustand, sondern wurde zur Verdeutlichung gewählt.In the drawing, the rear end of the tubular bag 15 is already somewhat compressed, but the piston 3 is shown pulled backwards. In this respect, this type of representation does not show an actual operating state, but was chosen for clarification.

An seinem vorderen Ende trägt der Schlauchbeutel 15 einen Ring 17, der mit einer nach hinten weisenden Kante auf den Schlauchbeutel 15 aufgeklebt ist. Der Ring 17 weist einen nach außen ragenden Flansch 18 auf, dessen Randbereich 19 einen den Innendurchmesser der Kartusche 1 überschreitenden Außendurchmesser hat. Am vorderen Ende bildet der Ring 17 eine sich nach vorne verjüngende konische Dichtfläche 20.At its front end, the tubular bag 15 carries a ring 17 which is glued to the tubular bag 15 with an edge pointing backwards. The ring 17 has an outwardly projecting flange 18 , the edge region 19 of which has an outer diameter which exceeds the inner diameter of the cartridge 1 . At the front end, the ring 17 forms a conical sealing surface 20 that tapers towards the front.

Zur Inbetriebnahme des Gerätes wird ein mit einer auszubringenden Masse gefüllter Schlauchbeutel 15 vom vorderen Ende her in die Kartusche 1 eingeschoben, bis der Randbereich 19 des Ringflansches 18 an der Stirnkante 5 der Kartusche 1 anstößt. Das durch den Ring 17 nach vorne herausragende Ende des Schlauchbeutels 15, das ähnlich wie sein hinteres Ende gestaltet ist, wird mitsamt des auch vorne vorhandenen Clips abgeschnitten.To start up the device, a tubular bag 15 filled with a mass to be dispensed is inserted into the cartridge 1 from the front end until the edge region 19 of the ring flange 18 abuts the front edge 5 of the cartridge 1 . The end of the tubular bag 15 projecting forward through the ring 17 , which is designed similarly to its rear end, is cut off together with the clip also present at the front.

Sodann wird die Kappe 2 auf die Kartusche 1 aufgesetzt, wobei ihr Endbereich 7 den Endbereich 4 der Kartusche 1 umgreift, so daß von dem Einlaß 10 gebildete Dichtkante 12 die Dichtfläche 20 des Rings 17 berührt.The cap 2 is then placed on the cartridge 1 , its end region 7 encompassing the end region 4 of the cartridge 1 , so that the sealing edge 12 formed by the inlet 10 touches the sealing surface 20 of the ring 17 .

Die Endbereiche 4 und 7 von Kartusche 1 und Kappe 2 sind so bemessen, daß im zusammengesteckten Zustand zwischen der Schulter 6 und der Stirnkante 8 eine Fuge verbleibt; ebenso sind die Vorderseite des Rings 17 und die Hinterseite der Kappe 2 so gestaltet und dimensioniert, daß vor dem Ring 17 außerhalb der konischen Dichtfläche 20 ein Luftraum bleibt. So wird sichergestellt, daß die Kartusche 1, die Kappe 2 und der Ring 17 in der beschriebenen Weise aneinander liegen, wenn die Kappe 2 mit der Kartusche 1 verriegelt wird. Die Mittel zur Verriegelung sind in der Zeichnung nicht dargestellt; sie können beispielsweise darin bestehen, daß die Kartusche 1 samt Kappe 2 und Schlauchbeutel 15 in ein entsprechend gestaltetes Gerät eingelegt wird, das einen Antrieb für den Kolben 3 aufweist. Ein derartiges Gerät ist in EP 0 492 413 A1 beschrieben.The end regions 4 and 7 of cartridge 1 and cap 2 are dimensioned such that a joint remains between the shoulder 6 and the front edge 8 in the assembled state; Likewise, the front of the ring 17 and the rear of the cap 2 are designed and dimensioned such that an air space remains in front of the ring 17 outside the conical sealing surface 20 . This ensures that the cartridge 1 , the cap 2 and the ring 17 lie against one another in the manner described when the cap 2 is locked with the cartridge 1 . The means for locking are not shown in the drawing; they can consist, for example, of inserting the cartridge 1 together with the cap 2 and tubular bag 15 into an appropriately designed device which has a drive for the piston 3 . Such a device is described in EP 0 492 413 A1.

Sofern der Ring 17 gegenüber dem Schlauchbeutel 15 verkantet angeklebt sein sollte, wird er dadurch, daß der Randbereich 19 an der Stirnkante 5 der Kartusche 1 anliegt, automatisch ausgerichtet. Ferner wird ein etwaiger radialer Versatz des Rings 17 durch die Innenfläche des Endbereichs 7 der Kappe 2 ausgeglichen. Zu diesem Zweck ist der Außendurchmesser des Ringflansches 18 nur geringfügig kleiner als der Innendurchmesser des Endbereichs 7 der Kappe 2, so daß eine Führung erreicht wird. Beim Aufstecken der Kappe 2 auf die Kartusche 1 und gegenseitiger Verriegelung erfolgt somit automatisch eine Ausrichtung der am Ring 17 vorgesehenen konischen Dichtfläche 20 auf die in der Kappe 2 vorhandene Dichtkante 12.If the ring 17 should be glued to the tubular bag 15 in a tilted manner, it is automatically aligned in that the edge region 19 rests on the front edge 5 of the cartridge 1 . Furthermore, any radial offset of the ring 17 is compensated for by the inner surface of the end region 7 of the cap 2 . For this purpose, the outer diameter of the ring flange 18 is only slightly smaller than the inner diameter of the end region 7 of the cap 2 , so that guidance is achieved. When attaching the cap 2 to the cartridge 1, and mutual locking thus automatically aligning the ring 17 provided at the conical sealing surface 20 of the presence in the cap 2 sealing edge 12th

Wird nun durch Vorschub des Kolbens 3 auf das hintere Ende des Schlauchbeutels 15 Druck ausgeübt, so übertragt sich dieser durch den Schlauchbeutel 15 nach vorne und steht dort als Dichtungsdruck zur Verfügung. Sollte der Schlauchbeutel 15 innerhalb der Kartusche 1 klemmen, so sucht er beim Vorschub des Kolbens 3 die Kartusche 1 mitzunehmen; dabei gestattet die zwischen Stirnkante 8 und Schulter 6 vorgesehene Fuge eine derartige (geringfügige) Bewegung, daß der beschriebene Dichtungsdruck erreicht wird.If pressure is now exerted on the rear end of the tubular bag 15 by advancing the piston 3 , this is transmitted forward through the tubular bag 15 and is available there as a sealing pressure. If the tubular bag 15 jams inside the cartridge 1 , it tries to take the cartridge 1 with it when the plunger 3 is advanced; the joint provided between the front edge 8 and shoulder 6 permits such a (slight) movement that the sealing pressure described is achieved.

Sollte sich der Schlauchbeutel 15 aufgrund einer bei der Fertigung überschrittenen Toleranz oder aufgrund von Verschmutzungen nicht vollständig in die Kartusche 1 einschieben lassen oder sollten in der Umgebung des Dichtungsbereichs Fremdkörper eingebracht worden sein, so verhindert dies ein Verriegeln von Kartusche 1 und Kappe 2 und wird dadurch vor der eigentlichen Inbetriebnahme des Gerätes erkennbar.If the tubular bag 15 cannot be pushed completely into the cartridge 1 due to a tolerance exceeded during manufacture or due to contamination, or if foreign bodies have been introduced in the vicinity of the sealing area, this prevents the cartridge 1 and cap 2 from locking and becomes thereby recognizable before the device is actually put into operation.

In der Zeichnung ist nur eine einzelne Kartusche gezeigt; diese kann aber Teil einer paarweisen Anordnung sein, wie sie bei dem Gerät nach EP 0 492 413 A1 vorgesehen ist. Aus diesem Grund ist die Ausbringtülle 11 gegenüber der Achse seitlich versetzt. Wie eingangs ausgeführt, ist ein exaktes und vollständiges Ausbringen der Masse entsprechend dem Kolbenvorschub insbesondere bei solchen Doppel- oder Mehrfach-Anordnungen zur Herstellung von Komponenten-Gemischen von Bedeutung.Only a single cartridge is shown in the drawing; however, this can be part of a paired arrangement, as is provided in the device according to EP 0 492 413 A1. For this reason, the dispensing spout 11 is laterally offset with respect to the axis. As stated at the beginning, an exact and complete application of the mass in accordance with the piston feed is important, in particular in the case of such double or multiple arrangements for the production of component mixtures.

Claims (5)

  1. A combination of a film tube (15) for receiving a flowable substance and a device for emptying the tube, wherein the film tube (15) at its dispensing end has a ring (17) and the device comprises a cylindrical housing (1) for receiving the film tube (15) between a displaceable piston (3) and a cap (2), which cap has an annular engaging portion (12) surrounding a dispensing opening (9) and the opening (9) and cooperating with the ring (17) of the film tube (15) to seal the dispensing end of the film tube (15),
       characterised in that the ring (17) has a peripheral portion (19) exceeding the inner diameter of the housing (1) for engaging the supporting surface (5) of the housing (1) facing the cap (2).
  2. The combination of claim 1, characterised in that an end portion (4) of the housing (1) and a cylindrical end portion (7) of the cap (2) engage each other, and the peripheral portion (19) of the ring (17) is guided by the inner wall of the outer one of the two end portions (4, 7).
  3. The combination of claim 2, characterised in that the engaging end portions (4, 7) of the housing (1) and the cap (2) have such axial dimensions that a play is retained between their mutually facing surfaces (6, 8) when both the ring (17) abuts the engaging portion (12) of the cap (2) and the peripheral portion (19) of the ring abuts the supporting surface (5) of the housing (1).
  4. The combination of any one of claims 1 to 3, characterised in that the end portion (7) of the cap (2) surrounds the end portion (4) of the housing (1), and the end edge of the housing (1) forms the supporting surface (5) for the ring (17).
  5. The combination of any one of claims 1 to 4, characterised in that the ring (17) has a conical sealing surface (20) and the engaging portion (12) provided in the cap (2) for engaging the sealing surface (20) of the ring (17) is formed by an annular edge.
EP94119686A 1994-01-13 1994-12-13 Device for emptying a tubular bag Expired - Lifetime EP0663348B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9400524U 1994-01-13
DE9400524U DE9400524U1 (en) 1994-01-13 1994-01-13 Device for emptying a tubular bag

Publications (2)

Publication Number Publication Date
EP0663348A1 EP0663348A1 (en) 1995-07-19
EP0663348B1 true EP0663348B1 (en) 1998-06-03

Family

ID=6903167

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94119686A Expired - Lifetime EP0663348B1 (en) 1994-01-13 1994-12-13 Device for emptying a tubular bag

Country Status (16)

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US (2) US5501368A (en)
EP (1) EP0663348B1 (en)
JP (1) JP3504757B2 (en)
AT (1) ATE166848T1 (en)
AU (1) AU683109B2 (en)
BR (1) BR9500057A (en)
CA (1) CA2139446C (en)
CZ (1) CZ288023B6 (en)
DE (2) DE9400524U1 (en)
DK (1) DK0663348T3 (en)
ES (1) ES2119056T3 (en)
FI (1) FI950125A (en)
HU (1) HU213490B (en)
NO (1) NO950117L (en)
PL (1) PL176188B1 (en)
ZA (1) ZA9572B (en)

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Also Published As

Publication number Publication date
JPH07257644A (en) 1995-10-09
ATE166848T1 (en) 1998-06-15
AU8173494A (en) 1995-07-20
NO950117L (en) 1995-07-14
PL176188B1 (en) 1999-04-30
HU9500028D0 (en) 1995-03-28
ZA9572B (en) 1995-09-06
DE59406132C5 (en) 2007-03-08
DE59406132D1 (en) 1998-07-09
DK0663348T3 (en) 1998-10-12
US5653360A (en) 1997-08-05
ES2119056T3 (en) 1998-10-01
BR9500057A (en) 1995-10-17
CZ7095A3 (en) 1995-08-16
CA2139446A1 (en) 1995-07-14
CZ288023B6 (en) 2001-04-11
FI950125A (en) 1995-07-14
US5501368A (en) 1996-03-26
JP3504757B2 (en) 2004-03-08
CA2139446C (en) 2005-06-28
FI950125A0 (en) 1995-01-11
NO950117D0 (en) 1995-01-12
DE9400524U1 (en) 1995-05-18
EP0663348A1 (en) 1995-07-19
HU213490B (en) 1997-07-28
HUT69757A (en) 1995-09-28
PL306757A1 (en) 1995-07-24
AU683109B2 (en) 1997-10-30

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