EP0497739A2 - Dispensing cartridge with a supply cylinder and an expulsion piston - Google Patents

Dispensing cartridge with a supply cylinder and an expulsion piston Download PDF

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Publication number
EP0497739A2
EP0497739A2 EP92810054A EP92810054A EP0497739A2 EP 0497739 A2 EP0497739 A2 EP 0497739A2 EP 92810054 A EP92810054 A EP 92810054A EP 92810054 A EP92810054 A EP 92810054A EP 0497739 A2 EP0497739 A2 EP 0497739A2
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EP
European Patent Office
Prior art keywords
piston
sealing lip
cartridge according
discharge cartridge
sealing
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Granted
Application number
EP92810054A
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German (de)
French (fr)
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EP0497739A3 (en
EP0497739B1 (en
Inventor
Wilhelm A. Keller
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Individual
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Individual
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    • 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
    • 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
    • B05C17/00576—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 characterised by the construction of a piston as pressure exerting means, or of the co-operating container
    • B05C17/00579—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 characterised by the construction of a piston as pressure exerting means, or of the co-operating container comprising means for allowing entrapped air to escape to the atmosphere
    • 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
    • B65D83/0005—Containers or packages provided with a piston or with a movable bottom or partition having approximately the same section as the container
    • B65D83/0033—Containers or packages provided with a piston or with a movable bottom or partition having approximately the same section as the container the piston being a follower-piston and the dispensing means comprising a hand-operated pressure-device at the opposite part of the container
    • 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
    • B65D2205/00—Venting means
    • B65D2205/04—Venting means for venting during the initial insertion of a piston

Definitions

  • the present invention relates to a discharge cartridge with a storage cylinder and a delivery piston, in the cylinder wall of which a sealing ring is embedded.
  • a discharge cartridge is known from EP-A-344 491 by the same applicant.
  • this discharge cartridge represented an advance over the known state of the art, but tests have shown that it can be improved.
  • Swiss application 02 079 / 90-1 starting from a delivery piston with ventilation bores, a feature was essentially improved in order to prevent material flowing out when the delivery piston is pressed in and closing the ventilation bore, which can lead to disruptive contamination and measures have also been taken to ensure faster and easier closing.
  • the present invention is aimed at improving another property of the discharge cartridge, at improving the storage of the filling compound, in particular at the long-term storage of aggressive substances.
  • a sealing ring While for many applications the sealing of the delivery plunger in the cartridge wall by means of a sealing ring, generally an O-ring is sufficient, aggressive substances that can attack this O-ring or those that have a low viscosity or extreme creep properties can cause situations , in which the use of only one sealing element becomes problematic. There are also substances that are sensitive to the penetration of water vapor or gases and thereby change their chemical properties.
  • FIG. 3 shows the discharge cartridge 1 with the supply cylinder 2 with its wall 3, the supply cylinder being closed at the bottom by a lockable mouth, not shown.
  • a delivery piston 50 which generally consists of a soft material, preferably plastic.
  • the delivery piston is sealed against the wall 3 of the supply cylinder 2 by two sealing members and no longer only by one which is arranged at the end of the delivery piston on the product side .
  • O-ring 51 is now inserted into the cylinder jacket 53 at a distance from the end 52 of the delivery piston, preferably at its other end.
  • a circumferential sealing lip 54 At the end 52 of the delivery piston on the product side there is a circumferential sealing lip 54, which is adjoined by a circumferential V-shaped groove 55 which merges into the piston wall 53.
  • the sealing lip is flat at the front with the front piston surface.
  • a circumferential cavity 57 (see Fig. 3) is formed.
  • This cavity 57 serves as a collecting chamber for the wall layer of the filling compound stripped from the O-ring, or if a small amount of filling compound does get behind the sealing lip.
  • vent hole 9 can be closed by a closure 10, which is described in detail in the aforementioned Swiss application and seals the same overflow chamber 17.
  • the bottom surface 58 of the piston contains an arrangement of radially extending ventilation grooves 15, which have a constantly increasing depth towards the ventilation bore 9 in this exemplary embodiment. Experiments have shown that these grooves 15 can also have a uniform depth in order to perform their function correctly. As can be seen from FIG. 1, the number of radially arranged grooves 15 decreases in the central region in order to facilitate production.
  • the delivery piston also has the radial ribs 16 already described in the aforementioned application.
  • the circumferential groove 55 is also vented. This ventilation is achieved in that the radially extending grooves 15 open into the V-shaped circumferential groove 55 at their outer end. As a result, the air can be pressed out of this V-shaped groove completely to the vent hole 9 in order to escape there.
  • the dosing ratio can be maintained exactly, which is particularly the case with multiple discharge cartridges with storage cylinders of different diameters, respectively. Volumes is necessary.
  • the O-ring or other sealing element does not come into contact with the filling compound, or only very slightly, during the storage time, which is particularly important for long storage times and also when it comes to aggressive products.
  • the double sealing system also effectively prevents the penetration of water vapor or gases, which could endanger the chemical stability of the filling compound.
  • the central lip is generally not damaged when the piston is pushed in. This is in contrast to conventional methods which, by introducing venting needles or the like between the piston and the cylinder wall, achieve often incomplete venting and / or damage the sealing member.
  • the delivery piston 60 has, in addition to the first sealing lip 54, a second sealing lip 61, which can be somewhat smaller than the first. Between the sealing lip 54 and the flat bottom 66 of the piston in this example there is the same circumferential groove 55 as in the first example, into which, for example, the same ventilation grooves 15 as in the first example can open.
  • the second sealing lip is not only a safeguard when the first one is damaged, but also comes into operation if low-viscosity fillers are used.
  • the O-ring 65 is embedded in a recess 63 in the wall 62 which is arranged near the end opposite the sealing lips, which is followed by a second recess 64.
  • sealing lips are not limited to the version with the overflow chamber, but is suitable for all types of delivery pistons in discharge cartridges.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • Coating Apparatus (AREA)

Abstract

The dispensing cartridge (1) has a supply cylinder (2) and an expulsion piston (50), in whose wall (53) a sealing ring (51) is embedded. Differing from the prior art, the sealing ring (51) is embedded with spacing from the end (52) of the expulsion piston (50) facing the cartridge contents (4), and this end (52) additionally has a sealing lip (54), a V-shaped, circumferential groove (55) being arranged between said sealing lip and the piston wall (53). The bottom surface (58) of the expulsion piston (50) facing the cartridge contents (4) has radially extending venting grooves (15), which open out at a venting bore (9), while the other ends of the venting grooves (15) open out in the V-shaped circumferential groove (55) on the sealing lip (54). In a cartridge having an expulsion piston sealed off in this manner, the contents are effectively prevented from flowing out, even if they are aggressive, low-viscosity substances or substances with an extreme creep capability, as a result of which their storage capability is also greatly increased. <IMAGE>

Description

Die vorliegende Erfindung bezieht sich auf eine Austragkartusche mit einem Vorratszylinder und einem Förderkolben, in dessen Zylinderwand ein Dichtungsring eingelassen ist. Eine solche Austragkartusche ist aus der EP-A-344 491 des gleichen Anmelders bekannt. Diese Austragkartusche stellte damals gegenüber dem bekannten Stand der Technik zwar einen Fortschritt dar, doch haben Versuche gezeigt, dass sie verbesserungsfähig ist. In der Schweizer Anmeldung 02 079/90-1 wurde, ausgehend von einem Förderkolben mit Entlüftungsbohrungen, im wesentlichen ein Merkmal verbessert um zu verhindern, dass beim Hineinpressen des Förderkolbens und Verschliessen der Entlüftungsbohrung herausfliessendes Material zu störenden Verschmutzungen führen kann und es wurden ferner Massnahmen ergriffen, um ein schnelleres und einfacheres Verschliessen zu gewährleisten.The present invention relates to a discharge cartridge with a storage cylinder and a delivery piston, in the cylinder wall of which a sealing ring is embedded. Such a discharge cartridge is known from EP-A-344 491 by the same applicant. At the time, this discharge cartridge represented an advance over the known state of the art, but tests have shown that it can be improved. In the Swiss application 02 079 / 90-1, starting from a delivery piston with ventilation bores, a feature was essentially improved in order to prevent material flowing out when the delivery piston is pressed in and closing the ventilation bore, which can lead to disruptive contamination and measures have also been taken to ensure faster and easier closing.

Die vorliegende Erfindung hingegen richtet sich auf die Verbesserung einer anderen Eigenschaft der Austragkartusche, auf die Verbesserung der Aufbewahrung der Füllmasse, insbesondere auf die langfristige Verwahrung von agressiven Substanzen. Während für viele Anwendungen das Abdichten des Förderkolbens in der Kartuschenwand mittels einem Dichtungsring, im allgemeinen ein O-Ring genügt, können durch agressive Substanzen, die diesen O-Ring angreifen können oder durch solche, die eine niedrige Viskosität bzw. extreme Kriecheigenschaften aufweisen Situationen entstehen, in welchen die Verwendung nur eines Dichtorgans problematisch wird. Ausserdem gibt es Substanzen, die gegenüber Eindringen von Wasserdampf oder Gasen empfindlich sind und dadurch ihre chemischen Eigenschaften verändern.The present invention, on the other hand, is aimed at improving another property of the discharge cartridge, at improving the storage of the filling compound, in particular at the long-term storage of aggressive substances. While for many applications the sealing of the delivery plunger in the cartridge wall by means of a sealing ring, generally an O-ring is sufficient, aggressive substances that can attack this O-ring or those that have a low viscosity or extreme creep properties can cause situations , in which the use of only one sealing element becomes problematic. There are also substances that are sensitive to the penetration of water vapor or gases and thereby change their chemical properties.

Es ist von einer Austragkartusche gemäss Stand der Technik ausgehend eine Aufgabe der vorliegenden Erfindung eine solche vor allem dahingehend zu verbessern, dass ein Ausfliessen oder eine schädliche Beeinflussung des Kartuscheninhalts wirksam verhindert wird. Diese Aufgabe wird mit einer Austragkartusche gemäss Patentanspruch 1 gelöst. In einer Weiterausbildung, die ein bevorzugtes Ausführungsbeispiel darstellt, wird zudem wirksam verhindert, dass die Dichtungslippe beschädigt wird. In einem weiteren Ausführungsbeispiel wird verhindert, dass die Beschädigung der Dichtungslippe Schaden verursacht.It is from a discharge cartridge according to the state of the art starting from an object of the present invention, such an improvement primarily in such a way that an outflow or a harmful influence on the cartridge contents is effectively prevented. This object is achieved with a discharge cartridge according to claim 1. In a further development, which represents a preferred exemplary embodiment, it is also effectively prevented that the sealing lip is damaged. In a further exemplary embodiment, the damage to the sealing lip is prevented from causing damage.

Die Erfindung wird im folgenden anhand einer Zeichnung von Ausführungsbeispielen näher erläutert.

  • Fig. 1 zeigt eine Sicht von unten auf den Förderkolben,
  • Fig. 2 zeigt einen Schnitt gemäss II-II in Fig. 1,
  • Fig. 3 zeigt im Schnitt den aufgesetzten Förderkolben in der Anfangsstellung vor dem Austragen und
  • Fig. 4 zeigt im Schnitt ein weiteres Ausführungsbeispiel eines Förderkolbens.
The invention is explained below with reference to a drawing of exemplary embodiments.
  • 1 shows a view from below of the delivery piston,
  • 2 shows a section according to II-II in FIG. 1,
  • Fig. 3 shows in section the attached delivery piston in the initial position before discharge and
  • Fig. 4 shows in section a further embodiment of a delivery piston.

Man erkennt in Fig. 3 die Austragkartusche 1 mit dem Vorratszylinder 2 mit seiner Wand 3, wobei der Vorratszylinder unten durch eine nicht dargestellte abschliessbare Mündung abgeschlossen ist. Im Zylinder 2 befindet sich die genau abgewogene Menge der Füllmasse 4 sowie ein Förderkolben 50, der in der Regel aus einem weichen Material, vorzugsweise Kunststoff, besteht. Abweichend vom Förderkolben gemäss EP-A-344 491 oder gemäss der bereits erwähnten Schweizer Anmeldung 02 079/90 wird der Förderkolben gegenüber der Wand 3 des Vorratszylinders 2 durch zwei Dichtungsorgane abgedichtet und nicht mehr nur durch eines, das am produktseitigen Ende des Förderkolbens angeordnet ist.3 shows the discharge cartridge 1 with the supply cylinder 2 with its wall 3, the supply cylinder being closed at the bottom by a lockable mouth, not shown. In the cylinder 2 there is the precisely weighed amount of the filling compound 4 and a delivery piston 50, which generally consists of a soft material, preferably plastic. Deviating from the delivery piston according to EP-A-344 491 or according to the already mentioned Swiss application 02 079/90, the delivery piston is sealed against the wall 3 of the supply cylinder 2 by two sealing members and no longer only by one which is arranged at the end of the delivery piston on the product side .

Der sonst übliche Dichtungsring, resp. O-Ring 51, ist nun in einem Abstand vom Ende 52 des Förderkolbens, vorzugsweise an seinem anderen Ende, in dessen Zylindermantel 53 eingelassen. Am produktseitigen Ende 52 des Förderkolbens befindet sich eine umlaufende Dichtungslippe 54, an die sich eine umlaufende V-förmige Nut 55 anschliesst, die in die Kolbenwand 53 übergeht. Wie insbesondere aus Fig. 2 hervorgeht, ist die Dichtungslippe vorne plan mit der vorderen Kolbenfläche.The otherwise usual sealing ring, respectively. O-ring 51 is now inserted into the cylinder jacket 53 at a distance from the end 52 of the delivery piston, preferably at its other end. At the end 52 of the delivery piston on the product side there is a circumferential sealing lip 54, which is adjoined by a circumferential V-shaped groove 55 which merges into the piston wall 53. As can be seen in particular from FIG. 2, the sealing lip is flat at the front with the front piston surface.

An der Stelle, an der der Dichtungsring 51 eingelassen ist, ist die Kolbenwand 53 verdickt, wobei der Aussenumfang dort der gleiche ist wie an der Basis 56 der Dichtungslippe 54, so dass zwischen dieser Basis und der Verdickung, in der der O-Ring eingelassen ist, ein umlaufender Hohlraum 57 (siehe Fig. 3) entsteht. Dieser Hohlraum 57 dient als Auffangskammer für die vom O-Ring abgestreifte Wandschicht der Füllmasse, oder falls doch eine geringe Menge Füllmasse hinter die Dichtungslippe gelangt.At the point at which the sealing ring 51 is embedded, the piston wall 53 is thickened, the outer circumference there being the same as at the base 56 of the sealing lip 54, so that between this base and the thickening in which the O-ring is embedded is, a circumferential cavity 57 (see Fig. 3) is formed. This cavity 57 serves as a collecting chamber for the wall layer of the filling compound stripped from the O-ring, or if a small amount of filling compound does get behind the sealing lip.

Während die doppelte Abdichtung ihre Wirksamkeit an jedem Förderkolben entfalten und eingesetzt werden kann, falls es die Füllmasse erfordert, ist die Verwendung einer solchen doppelten Dichtung besonders wirkungsvoll in Verbindung mit einem Förderkolben, dessen Boden wirksam entlüftet wird, insbesondere gemäss vorliegendem bevorzugten Ausführungsbeispiel, worin der Boden Entlüftungsnuten und eine Entlüftungsbohrung enthält. Im Gegensatz dazu besteht bei anderen bekannten Entlüftungsmethoden mit Entlüftungsnadeln oder dergleichen die Gefahr der Verletzung der Dichtungslippe. Das ganze Entlüftungssystem mit den sich daraus ergebenden Vorteilen ist ausführlich in der bereits erwähnten Schweizer Anmeldung, auf die verwiesen wird, beschrieben, so dass verschiedene Elemente hier nur noch summarisch erwähnt werden.While the double seal can develop its effectiveness on any delivery piston and can be used if the filling compound requires it, the use of such a double seal is particularly effective in connection with a delivery piston, the bottom of which is effectively vented, in particular according to the present preferred exemplary embodiment, in which the Bottom ventilation grooves and a ventilation hole contains. In contrast, with other known venting methods with venting needles or the like there is a risk of damage to the sealing lip. The entire ventilation system with the resulting advantages is described in detail in the aforementioned Swiss application, to which reference is made, so that various elements are only mentioned here in summary.

Man erkennt in Fig. 2 die dem Kartuscheninhalt 4 zugewandte Bodenfläche 58, die in Abweichung vom oben genannten Stand der Technik plan und nicht zur Entlüftungsbohrung 9 hin vertieft ausgebildet ist, um ein möglichst vollständiges Austragen der Füllmasse zu erzielen. Die Entlüftungsbohrung 9 ist durch einen Verschluss 10 verschliessbar, der eingehend in der genannten Schweizer Anmeldung beschrieben ist und dieselbe Ueberlaufkammer 17 abdichtet.2 shows the bottom surface 58 facing the cartridge content 4, which, in deviation from the above-mentioned prior art, is flat and not recessed towards the vent hole 9 in order to achieve the most complete discharge of the filling compound. The vent hole 9 can be closed by a closure 10, which is described in detail in the aforementioned Swiss application and seals the same overflow chamber 17.

Die Bodenfläche 58 des Kolbens enthält eine Anordnung von radial verlaufenden Entlüftungsnuten 15, die zur Entlüftungsbohrung 9 hin in diesem Ausführungsbeispiel eine stetig sich vergrössernde Tiefe aufweisen. Versuche haben ergeben, dass diese Nuten 15 auch eine gleichmässige Tiefe aufweisen können, um ihre Funktion richtig zu erfüllen. Wie aus Fig. 1 zu erkennen ist, nimmt die Anzahl von radial angeordneten Nuten 15 im Mittelbereich ab, um die Herstellung zu erleichtern. Ausserdem weist der Förderkolben ebenfalls die bereits in der erwähnten Anmeldung beschriebenen radialen Rippen 16 auf.The bottom surface 58 of the piston contains an arrangement of radially extending ventilation grooves 15, which have a constantly increasing depth towards the ventilation bore 9 in this exemplary embodiment. Experiments have shown that these grooves 15 can also have a uniform depth in order to perform their function correctly. As can be seen from FIG. 1, the number of radially arranged grooves 15 decreases in the central region in order to facilitate production. In addition, the delivery piston also has the radial ribs 16 already described in the aforementioned application.

Wichtig für die vollständige Entlüftung ist, dass auch die umlaufende Nut 55 entlüftet wird. Diese Entlüftung wird dadurch erreicht, dass die radial verlaufenden Nuten 15 an ihrem äusseren Ende in die V-förmige umlaufende Nut 55 münden. Dadurch kann die Luft aus dieser V-förmigen Nut vollständig zur Entlüftungsbohrung 9 gepresst werden, um dort zu entweichen.It is important for complete ventilation that the circumferential groove 55 is also vented. This ventilation is achieved in that the radially extending grooves 15 open into the V-shaped circumferential groove 55 at their outer end. As a result, the air can be pressed out of this V-shaped groove completely to the vent hole 9 in order to escape there.

Durch die vollständige Entlüftung der Kolbenfläche kann das Dosierverhältnis exakt eingehalten werden, was insbesondere bei Mehrfach-Austragkartuschen mit Vorratszylindern verschiedener Durchmesser, resp. Volumina notwendig ist. Wie bereits erwähnt, kommt der O-Ring oder sonstiges Dichtungorgan während der Lagerzeit nicht oder nur sehr geringfügig mit der Füllmasse in Berührung, was insbesondere für lange Lagerzeiten wichtig ist und auch wenn es sich um agressive Produkte handelt. Andererseits verhindert das doppelte Dichtungssystem auch wirksam das Eindringen von Wasserdampf oder Gasen, die die chemische Stabilität der Füllmasse gefährden könnten.Due to the complete venting of the piston surface, the dosing ratio can be maintained exactly, which is particularly the case with multiple discharge cartridges with storage cylinders of different diameters, respectively. Volumes is necessary. As already mentioned, the O-ring or other sealing element does not come into contact with the filling compound, or only very slightly, during the storage time, which is particularly important for long storage times and also when it comes to aggressive products. On the other hand, the double sealing system also effectively prevents the penetration of water vapor or gases, which could endanger the chemical stability of the filling compound.

Die Dichtungslippe wird bei zentraler Entlüftung beim Hineinstossen des Kolbens im allgemeinen nicht verletzt. Dies im Gegensatz zu herkömmlichen Verfahren, die durch Einbringen von Entlüftungsnadeln oder dergleichen zwischen Kolben und Zylinderwand eine oft unvollständige Entlüftung erzielen und/oder das Dichtungsorgan beschädigen.The central lip is generally not damaged when the piston is pushed in. This is in contrast to conventional methods which, by introducing venting needles or the like between the piston and the cylinder wall, achieve often incomplete venting and / or damage the sealing member.

Es kann jedoch vorkommen, dass bei der Herstellung oder beim Transport oder beim unsachgemässen Hineinstossen des Kolbens gemäss den Figuren 1-3 die Dichtungslippe verletzt wird, was unangenehme Folgen haben kann. Um solchen Schäden vorzubeugen ist gemäss Figur 4 vorgesehen, zwei Dichtungslippen anzuordnen.However, it can happen that the sealing lip is damaged during manufacture or transport or when the piston is pushed in incorrectly according to FIGS. 1-3, which can have unpleasant consequences. In order to prevent such damage, two sealing lips are provided according to FIG. 4.

Der Förderkolben 60 weist neben der ersten Dichtungslippe 54 wie beim ersten Kolben 50 eine zweite Dichtungslippe 61 auf, die etwas kleiner als die erste sein kann. Zwischen der Dichtungslippe 54 und dem in diesem Beispiel ebenen Boden 66 des Kolbens befindet sich die gleiche umlaufende Nut 55 wie beim ersten Beispiel, in die beispielsweise die gleichen Entlüftungsnuten 15 wie beim ersten Beispiel münden können.As with the first piston 50, the delivery piston 60 has, in addition to the first sealing lip 54, a second sealing lip 61, which can be somewhat smaller than the first. Between the sealing lip 54 and the flat bottom 66 of the piston in this example there is the same circumferential groove 55 as in the first example, into which, for example, the same ventilation grooves 15 as in the first example can open.

Die zweite Dichtungslippe stellt nicht nur eine Sicherung bei Verletzung der ersten dar sondern tritt dann in Funktion, falls dünnflüssige Füllmassen verwendet werden. Entsprechend dem ersten Beispiel ist der O-Ring 65 in einer Ausnehmung 63 in Wand 62 eingelassen, die nahe dem den Dichtungslippen entgegengesetzten Ende angeordnet ist, der sich eine zweite Ausnehmung 64 anschliesst.The second sealing lip is not only a safeguard when the first one is damaged, but also comes into operation if low-viscosity fillers are used. According to the first example, the O-ring 65 is embedded in a recess 63 in the wall 62 which is arranged near the end opposite the sealing lips, which is followed by a second recess 64.

Die Verwendung von zwei Dichtungslippen ist nicht auf die Ausführung mit der Ueberlaufkammer beschränkt sondern für alle Arten Förderkolben in Austragkartuschen geeignet.The use of two sealing lips is not limited to the version with the overflow chamber, but is suitable for all types of delivery pistons in discharge cartridges.

Claims (11)

Austragkartusche (1) mit einem Vorratszylinder (2) und einem Förderkolben (50), in dessen Wand (53) ein Dichtungsring (51) eingelassen ist, dadurch gekennzeichnet, dass der Dichtungsring (51) in einem Abstand vom dem Kartuscheninhalt (4) zugewandten Ende (52) des Förderkolbens (50) eingelassen ist und dieses Ende (52) zusätzlich eine Dichtungslippe (54) aufweist.Discharge cartridge (1) with a supply cylinder (2) and a delivery plunger (50), in the wall (53) of which a sealing ring (51) is let in, characterized in that the sealing ring (51) faces away from the contents of the cartridge (4) End (52) of the delivery piston (50) is inserted and this end (52) additionally has a sealing lip (54). Austragkartusche mit einem Vorratszylinder und einem Förderkolben (60), in dessen Wand (62) mindestens ein Dichtungsring eingelassen ist, dadurch gekennzeichnet, dass der oder die Dichtungsring(e) in einem Abstand vom dem Kartuscheninhalt zugewandten Ende des Förderkolbens (60) eingelassen ist (sind) und dieses Ende zwei in einem Abstand voneinander angeordnete Dichtungslippen (54, 61) aufweist.Discharge cartridge with a supply cylinder and a delivery piston (60), in the wall (62) of which at least one sealing ring is embedded, characterized in that the sealing ring (s) is inserted at a distance from the end of the delivery piston (60) facing the contents of the cartridge ( ) and this end has two sealing lips (54, 61) arranged at a distance from one another. Austragkartusche nach Anspruch 1, dadurch gekennzeichnet, dass zwischen der Dichtungslippe (54) und der Kolbenwand (53) eine umlaufende V-förmige Nut (55) angeordnet ist.Discharge cartridge according to claim 1, characterized in that a circumferential V-shaped groove (55) is arranged between the sealing lip (54) and the piston wall (53). Austragkartusche nach Anspruch 2, dadurch gekennzeichnet, dass zwischen der dem Ende nächsten Dichtungslippe (54) und der Kolbenwand (2) eine V-förmige Nut (55) angeordnet ist.Discharge cartridge according to claim 2, characterized in that a V-shaped groove (55) is arranged between the sealing lip (54) closest to the end and the piston wall (2). Austragkartusche nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die dem Kartuscheninhalt (4) zugekehrte Bodenfläche (58) des Förderkolbens (50) radial verlaufende Entlüftungsnuten (15) aufweist, die an einer in der Mitte angeordneten Entlüftungsbohrung (9) münden und deren anderen Enden in der V-förmigen umlaufenden Nut (55) an der Dichtungslippe (54) münden.Discharge cartridge according to one of claims 1 to 4, characterized in that the bottom surface (58) of the delivery piston (50) facing the cartridge content (4) has radially extending ventilation grooves (15) which open at a ventilation hole (9) arranged in the middle and the other ends of which open into the V-shaped circumferential groove (55) on the sealing lip (54). Austragkartusche nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Dichtungsring (51) in einer Verdickung in der Kolbenwand (53) eingelassen ist und zwischen dieser Verdickung und der Dichtungslippe (54) ein umlaufender, als Auffangskammer dienender Hohlraum (57) gebildet ist.Discharge cartridge according to one of claims 1 to 5, characterized in that the sealing ring (51) is embedded in a thickening in the piston wall (53) and a circumferential cavity (57) serving as a collecting chamber is formed between this thickening and the sealing lip (54) is. Austragkartusche nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Bodenfläche (58, 66) des Förderkolbens (50, 60) plan ist.Discharge cartridge according to one of claims 1 to 6, characterized in that the bottom surface (58, 66) of the delivery piston (50, 60) is flat. Austragkartusche nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Bodenfläche (58) des Förderkolbens (50) vom Kolbenrand zu der Entlüftungsbohrung (9) hin stetig vertieft ist.Discharge cartridge according to one of claims 1 to 7, characterized in that the bottom surface (58) of the delivery piston (50) is continuously recessed from the edge of the piston to the vent hole (9). Austragkartusche nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Entlüftungsnuten (15) eine gleichmässige Tiefe besitzen.Discharge cartridge according to one of claims 1 to 8, characterized in that the ventilation grooves (15) have a uniform depth. Austragkartusche nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Entlüftungsnuten (15) vom Kolbenrand zu der Entlüftungsbohrung (9) hin stetig vertieft sind.Discharge cartridge according to one of claims 1 to 8, characterized in that the ventilation grooves (15) from the piston edge to the ventilation hole (9) are continuously deepened. Austragkartusche nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass um die Entlüftungsbohrung (9) eine Ueberlaufkammer (17) angeordnet ist, die wie die Entlüftungsbohrung mit einem Verschluss (10) abgeschlossen ist.Discharge cartridge according to one of claims 1 to 10, characterized in that an overflow chamber (17) is arranged around the vent hole (9) and, like the vent hole, is closed with a closure (10).
EP92810054A 1991-01-29 1992-01-27 Dispensing cartridge with a supply cylinder and an expulsion piston Expired - Lifetime EP0497739B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH269/91 1991-01-29
CH26991 1991-01-29

Publications (3)

Publication Number Publication Date
EP0497739A2 true EP0497739A2 (en) 1992-08-05
EP0497739A3 EP0497739A3 (en) 1993-03-10
EP0497739B1 EP0497739B1 (en) 1996-10-09

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Family Applications (1)

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EP92810054A Expired - Lifetime EP0497739B1 (en) 1991-01-29 1992-01-27 Dispensing cartridge with a supply cylinder and an expulsion piston

Country Status (5)

Country Link
US (1) US5400926A (en)
EP (1) EP0497739B1 (en)
JP (1) JP3347759B2 (en)
KR (1) KR100239097B1 (en)
DE (1) DE59207301D1 (en)

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DE9315032U1 (en) * 1993-10-04 1994-01-27 Schneider Falk Walter Pistons for pumping low to high viscosity liquids from cartridges
WO1995028337A1 (en) * 1994-04-13 1995-10-26 Adlock Packaging Limited Sealing a flowable product in a dispenser
EP0693437A1 (en) * 1994-07-18 1996-01-24 Wilhelm A. Keller A cartridge with an exchangeable content package
NL1007557C2 (en) * 1997-11-17 1999-05-18 Cosmocair C V Variable volume container.
EP0899213A3 (en) * 1997-08-27 1999-07-07 L'oreal Pump-type packaging unit for a liquid or semi-liquid product
EP1514611A2 (en) 2003-09-10 2005-03-16 Heraeus Kulzer GmbH Closing piston for catridges having venting and barrier properties
US8678246B2 (en) 2008-03-26 2014-03-25 Adcatec Gmbh Cartridge and piston with ventilation device
US9844796B2 (en) 2005-10-14 2017-12-19 3M Innovative Properties Company Plunger and plunger assembly for a cartridge, system for storing a substance, and method of filling and sealing a substance in a delivery system
DE102017203241A1 (en) 2017-02-28 2018-08-30 Fischbach Kg Kunststoff-Technik Piston for cartridges
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US7621428B2 (en) * 2005-07-01 2009-11-24 Nordson Corporation Dispensing cartridge with vented piston
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US8235255B2 (en) * 2008-07-02 2012-08-07 Nordson Corporation Pistons with a lip seal and cartridge systems using such pistons
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EP2546166B1 (en) * 2011-07-15 2014-05-14 Sulzer Mixpac AG piston locking means
EP2987560A1 (en) * 2014-08-21 2016-02-24 Sulzer Mixpac AG Apparatus for dispensing a medium and method for front filing the apparatus
EP2998030A1 (en) * 2014-09-17 2016-03-23 Sulzer Mixpac AG Piston for a cartridge, cartridge and method of venting a cartridge
KR101696700B1 (en) * 2015-08-18 2017-01-23 주식회사 해민테크 Cartridge piston with venting device
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9315032U1 (en) * 1993-10-04 1994-01-27 Schneider Falk Walter Pistons for pumping low to high viscosity liquids from cartridges
WO1995028337A1 (en) * 1994-04-13 1995-10-26 Adlock Packaging Limited Sealing a flowable product in a dispenser
EP0693437A1 (en) * 1994-07-18 1996-01-24 Wilhelm A. Keller A cartridge with an exchangeable content package
US5667102A (en) * 1994-07-18 1997-09-16 Keller; Wilhelm A. Cartridge with an exchangeable content package
EP0899213A3 (en) * 1997-08-27 1999-07-07 L'oreal Pump-type packaging unit for a liquid or semi-liquid product
WO1999025627A1 (en) * 1997-11-17 1999-05-27 Cosmocair C.V. Container with variable volume
NL1007557C2 (en) * 1997-11-17 1999-05-18 Cosmocair C V Variable volume container.
EP1514611A2 (en) 2003-09-10 2005-03-16 Heraeus Kulzer GmbH Closing piston for catridges having venting and barrier properties
US9844796B2 (en) 2005-10-14 2017-12-19 3M Innovative Properties Company Plunger and plunger assembly for a cartridge, system for storing a substance, and method of filling and sealing a substance in a delivery system
US10279935B2 (en) 2005-10-14 2019-05-07 3M Innovative Properties Company Plunger and plunger assembly for a cartridge, system for storing a substance, and method of filing and sealing a substance in a delivery system
US8678246B2 (en) 2008-03-26 2014-03-25 Adcatec Gmbh Cartridge and piston with ventilation device
US11185391B2 (en) 2016-09-21 2021-11-30 3M Innovative Properties Company Mixer assembly and device for dispensing a dental material
DE102017203241A1 (en) 2017-02-28 2018-08-30 Fischbach Kg Kunststoff-Technik Piston for cartridges

Also Published As

Publication number Publication date
EP0497739A3 (en) 1993-03-10
JPH06100053A (en) 1994-04-12
US5400926A (en) 1995-03-28
JP3347759B2 (en) 2002-11-20
KR920015059A (en) 1992-08-26
EP0497739B1 (en) 1996-10-09
DE59207301D1 (en) 1996-11-14
KR100239097B1 (en) 2000-03-02

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