EP0245210B1 - Press-out piston having a storage chamber - Google Patents

Press-out piston having a storage chamber Download PDF

Info

Publication number
EP0245210B1
EP0245210B1 EP87810284A EP87810284A EP0245210B1 EP 0245210 B1 EP0245210 B1 EP 0245210B1 EP 87810284 A EP87810284 A EP 87810284A EP 87810284 A EP87810284 A EP 87810284A EP 0245210 B1 EP0245210 B1 EP 0245210B1
Authority
EP
European Patent Office
Prior art keywords
piston
piston head
press
thrust piece
pressure piece
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
Application number
EP87810284A
Other languages
German (de)
French (fr)
Other versions
EP0245210A1 (en
Inventor
Dieter Soehnlein
Josef Neuhoerl
Armin Hoffmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hilti AG
Original Assignee
Hilti AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Priority to AT87810284T priority Critical patent/ATE41328T1/en
Publication of EP0245210A1 publication Critical patent/EP0245210A1/en
Application granted granted Critical
Publication of EP0245210B1 publication Critical patent/EP0245210B1/en
Expired legal-status Critical Current

Links

Images

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
    • B05C17/00576—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
    • 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

Definitions

  • the invention relates to a multi-part ejection piston for containers essentially containing cylindrical, plastic masses, with a piston head arranged on the side of the mass to be pressed out, a pressure piece supporting the piston head on the side facing away from the mass, and a chamber arranged between the piston head and the pressure piece which communicates with the receiving space for the mass via at least one opening in the piston crown and with the atmosphere via at least one ventilation channel (see GB-A 2 072 755).
  • Cylindrical containers with a push-out piston that can be moved in them have been used for various sealing, filling and filling compounds for a long time. These can be single or multi-component systems which either harden after being pressed out of the container or remain elastic to a certain degree. In order to avoid premature hardening or foaming of the mass in the container during storage and transportation of the container, the air must be completely removed from the container after filling. As a rule, this is done by slightly deforming the cross-section of the container so that a gap-shaped channel is created through which the air can escape when the ejection piston is inserted. Furthermore, it is known to insert a needle between the wall of the container and the squeeze-out piston, so that ventilation channels are also formed.
  • the piston crown has openings which lead from the receiving space for the mass into a chamber arranged between the piston crown and the pressure piece.
  • This chamber communicates with the atmosphere via ventilation ducts, so that the air from the receiving space for the mass can escape through the opening into the chamber and from there into the atmosphere via the ventilation ducts.
  • the openings in the piston crown are dimensioned so small that the air, but not the mass, can get into the chamber through these openings.
  • the components are arranged in separate containers and are only brought together in the desired amount and in the mixing ratio required for the chemical reaction immediately before use.
  • These containers are usually processed in special devices which, by means of coupled piston rods, simultaneously feed the squeeze-out pistons in the various containers. So that the required mixing ratio is exactly maintained during the entire pressing process, the pressing pistons must be in a certain axial position at the beginning of the pressing process. If this is not the case, only one component is pressed out at the start of the pressing process, so that the required mixture does not come about and the mass is unusable.
  • the filling machines used for introducing the components into the containers are, however, relatively imprecise with regard to the metering of the masses, so that the required accuracy of the starting position of the squeeze-out pistons cannot be achieved during the pressing-in process.
  • the invention is therefore based on the object of providing a device which, regardless of the degree of filling of the containers, enables a precise starting position of the ejection piston without an air cushion in the mass.
  • the squeeze-out piston can thus be introduced into the container from the open end and be displaced into its intended starting position by displacing the excess mass and / or the air cushion into the chamber contained in the squeeze-out piston.
  • the opening in the piston crown is closed by the pressure piece and further mass escape from the receiving space is prevented.
  • the air contained in the chamber is displaced from the chamber through the ventilation channels. The mass that has penetrated into the chamber can dry out or remain plastic under the influence of the residual air contained in the chamber.
  • the pressure piece can consist of a material that is permeable to the solvents of the mass.
  • the soft, easily deformable polyethylene seals the mass, but is permeable to the volatile styrene contained therein.
  • the harder, styrene-impermeable polyamide can be used for the piston crown.
  • the opening can be closed, it can be dimensioned so large that even viscous masses can be displaced through the opening into the chamber without greater resistance when the ejection piston is inserted.
  • the pressure required for pressing the mass out of the container depends on the viscosity of the mass and the cross section of the outlet opening and can be very high under certain circumstances.
  • the pressure piece expediently has a peg-like extension for closing the opening.
  • the peg-like extension on the pressure piece and the bore provided on the piston crown can also be conical.
  • the pressure piece can be locked in the position closing the opening with the piston head. Locking the pressure piece with the piston crown ensures that the opening in the piston crown is closed remains.
  • the pressure piece can be locked to the piston crown, for example, by means of elastically deformable locking cams.
  • the pressure piece preferably executes an axial movement with respect to the piston crown. So that this is defined and the opening is only closed when the ejection piston has reached its starting position, it is expedient that the pressure piece is arched away from the piston head in the non-locked state.
  • the pressure piece is flattened like a membrane from the curved state. A certain amount of deformation resistance must be overcome.
  • the diameter is expanded at the same time. This radial expansion can be used for a simultaneous improvement in the sealing of the squeezing piston relative to the container.
  • the ventilation channels in the pressure piece can be closed by the piston crown.
  • This closing of the ventilation channels in addition to the pollution of the environment, an odor nuisance caused by the volatilizing solvents contained in the composition is avoided.
  • This closing of the ventilation channels can take place, for example, by welding them after the ejection piston has been brought into its initial position.
  • Ventilation channels are closed when the piston crown is locked.
  • the ventilation channels can thus be closed simultaneously with the locking of the pressure piece with the piston crown.
  • the opening in the piston crown and the ventilation channels are expediently closed only immediately before the pressure piece snaps into the piston crown.
  • the pressure piece has a collar which interacts with the piston head in the position closing the ventilation channels.
  • This collar can lie against the cylindrical wall of the piston crown from the inside. If the thrust piece is arched away from the piston crown in its initial position, the collar is additionally pressed outward against the piston crown by flattening the thrust piece.
  • the pressure piece expediently has circumferential sealing lips for the container containing the mass.
  • the pressure piece can thus be plugged onto the rear end of the piston head in the manner of a cap.
  • the attachment of sealing lips on the pressure piece is particularly expedient if the latter is arched away from the piston crown in the undeformed state, so that it is radially expanded when the opening is pressed flat. Due to this radial expansion, the sealing lips are additionally pressed against the wall of the container.
  • the piston crown forms a first seal against the container wall.
  • part of the mass can flow past the front sealing edge of the piston crown in the squeezing direction. So that this part of the mass cannot get outside and contaminate the environment, it is advantageous if the piston crown has leak bores which connect the chamber to an annular space delimited by the piston crown and the sealing lips. The part of the mass which has penetrated into this annular space can thus flow into the chamber arranged in the squeezing-out piston, so that there is no increased pressure build-up in front of the sealing lips.
  • the squeeze-out piston shown in FIGS. 1 to 3 consists of a piston crown, generally designated 1, and a pressure piece, generally designated 2.
  • the squeezing piston is arranged displaceably in a container denoted overall by 3.
  • the piston crown 1 has a sealing edge 1 a which is in contact with the wall of the container 3.
  • the piston crown 1 is provided in the central area with a recess 1 in which a sealing ring 4 is arranged.
  • the piston crown 1 has a central opening 1.
  • the opening 1 is provided on one side of the piston head 1 with locking cams 1d.
  • the piston crown 1 has ribs 1 e running in the axial direction.
  • the container 3 has a mouthpiece 3a, which is closed at the end with a destructible film 3b.
  • the mouthpiece 3a also has a thread 3c for screwing on a squeeze tube, not shown.
  • the container 3 is provided with a chamfer 3d on its inside. This chamfer 3d facilitates the insertion of the squeezing piston.
  • the container 3 is filled with a mass 5.
  • the pressure piece 2 is arched away from the piston head 1.
  • the pressure piece 2 has a peg-shaped projection 2a, which has a diameter of part over its length Opening 1c in the piston crown 1 corresponds.
  • the free end of the neck 2a is provided with a bead 2b.
  • the bead 2b forms a snap lock together with the locking cams 1d.
  • the pressure piece 2 is provided with a recess 2c on the side opposite the projection 2a. Between the piston crown 1 and the pressure piece 2 there is a chamber 6. The chamber 6 is in the position shown in FIG. 1 via the opening 1 in connection with the receiving space for the mass 5 the mouthpiece 3a of the container 3 is displaced, part of the mass 5 reaches the chamber 6. The starting position of the ejection piston can thus be set precisely. If this starting position is reached, the pressure piece 2 is pressed against the piston crown 1 with the aid of a plunger 8. The approach 2a closes the opening 1 and prevents further mass 5 from entering the chamber 6. The pressure piece 2 is locked in this position shown in FIG. 3 via the locking cams 1d and the bead 2b.
  • the part of the mass that has entered chamber 6 is enclosed.
  • the pressure piece 2 is supported on the piston head 1 via the ribs 1e. Due to the deformation of the pressure piece 2, it has been radially expanded and now presses the rear end of the piston head 1 against the wall of the container 3.
  • the squeeze-out piston shown in FIGS. 4 and 5 consists of a piston head, generally designated 11, and a pressure piece, generally designated 12.
  • the piston crown 11 has a sealing edge 11 a which is in contact with the wall of the container 3. In the central region, the piston crown 11 is provided with at least one radially running leak hole 11 b. A part of the mass which is not stripped from the sealing edge 11a can reach the chamber 16 arranged between the piston crown 11 and the pressure piece 12 via an annular space 17 and the leak hole 11b.
  • the piston crown 11 also has a central opening 11c.
  • the piston head 11 On the side of the mass 5 to be pressed out, the piston head 11 is provided with locking cams 11d d.
  • the piston crown 11 On the opposite side, the piston crown 11 has ribs 11e running in the axial direction.
  • the deformable pressure piece 12 is provided with a cylindrical projection 12a, which corresponds over part of its length in diameter to the opening 11c.
  • the approach 12a is provided with a locking groove 12b.
  • the opposite side of the pressure piece 12 has a recess 12c.
  • the pressure piece 12 is provided with at least one ventilation channel 12d.
  • This ventilation channel 12d serves to escape the air present in the chamber 16.
  • the area of the pressure piece 12 which surrounds the piston crown 11 is provided with sealing lips 12e.
  • the pressure piece 11 On the inside, the pressure piece 11 has a collar 11f pointing in the axial direction. The outside diameter of this collar 11f is matched to the inside diameter of the piston crown 12 in such a way that an annular gap remains in the non-latched position shown in FIG. 4, through which the air can escape into the atmosphere via the ventilation duct 12d.
  • the pressure piece 12 is locked to the piston crown 11 via the locking groove 12b and the locking cams 11d.
  • the opening 11 in the piston crown 11 is closed by the extension 12a.
  • the ventilation channel 12d is also closed by the collar 12f which interacts with the piston head 11. This prevents vapors from escaping from the mass into chamber 16 into the atmosphere.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Closures For Containers (AREA)
  • Coating Apparatus (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Compressor (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

A composite piston for ejecting a plastic mass from a receptacle includes a piston head and a pressure component which in combination form a chamber. The piston head and pressure component are displaceable within the receptacle from an insertion position into a locked position. When being moved into the locked position, a part of the plastic mass flows through an opening in the piston head into the chamber. After the locked position is established, the opening in the piston head is closed by an extension on the pressure component.

Description

Die Erfindung betrifft einen mehrteiligen Auspresskolben für in wesentlichem zylindrische, plastische Massen enthaltende Behälter, mit einem auf der Seite der auszupressenden Masse angeordneten Kolbenboden, einem den Kolbenboden auf der von der Masse abgewandten Seite abstützenden Druckstück, sowie einer zwischen dem Kolbenboden und dem Druckstück angeordneten Kammer, die über wenigstens eine Öffnung im Kolbenboden mit dem Aufnahmeraum für die Masse und über wenigstens einen Entlüftungskanal mit der Atmosphäre in Verbindung steht (siehe GB-A 2 072 755).The invention relates to a multi-part ejection piston for containers essentially containing cylindrical, plastic masses, with a piston head arranged on the side of the mass to be pressed out, a pressure piece supporting the piston head on the side facing away from the mass, and a chamber arranged between the piston head and the pressure piece which communicates with the receiving space for the mass via at least one opening in the piston crown and with the atmosphere via at least one ventilation channel (see GB-A 2 072 755).

Zylindrische Behälter mit darin verschiebbarem Auspresskolben werden für unterschiedliche Dicht-Füll- und Spachtelmassen seit längerer Zeit angewendet. Dabei kann es sich um Ein- oder Mehrkomponentensysteme handeln, welche nach dem Herauspressen aus dem Behälter entweder aushärten oder bis zu einem gewissen Grade elastisch bleiben. Um ein vorzeitiges Aushärten oder Aufschäumen der Masse im Behälter während der Lagerung und dem Transport des Behälters zu vermeiden, muss nach dem Einfüllen der Masse die Luft restlos aus dem Behälter entfernt werden. In der Regel erfolgt dies dadurch, dass der Behälter im Querschnitt etwas verformt wird, so dass ein spaltförmiger Kanal entsteht, durch den die Luft beim Einsetzen des Auspresskolbens entweichen kann. Weiterhin ist es bekannt, eine Nadel zwischen die Wandung des Behälters und den Auspresskolben einzuführen, so dass ebenfalls Entlüftungskanäle entstehen.Cylindrical containers with a push-out piston that can be moved in them have been used for various sealing, filling and filling compounds for a long time. These can be single or multi-component systems which either harden after being pressed out of the container or remain elastic to a certain degree. In order to avoid premature hardening or foaming of the mass in the container during storage and transportation of the container, the air must be completely removed from the container after filling. As a rule, this is done by slightly deforming the cross-section of the container so that a gap-shaped channel is created through which the air can escape when the ejection piston is inserted. Furthermore, it is known to insert a needle between the wall of the container and the squeeze-out piston, so that ventilation channels are also formed.

Bei einem bekannten, aus zwei Teilen bestehenden Auspresskolben (GB-A 2 072 755) weist der Kolbenboden Öffnungen auf, welche vom Aufnahmeraum für die Masse in eine zwischen dem Kolbenboden und dem Druckstück angeordnete Kammer führen. Diese Kammer steht über Entlüftungskanäle mit der Atmosphäre in Verbindung, so dass die Luft aus dem Aufnahmeraum für die Masse durch die Öffnung in die Kammer und von dort über die Entlüftungskanäle in die Atmosphäre entweichen kann. Die Öffnungen im Kolbenboden sind so klein dimensioniert, dass zwar die Luft, jedoch nicht die Masse durch diese Öffnungen in die Kammer gelangen kann.In a known, two-part ejection piston (GB-A 2 072 755), the piston crown has openings which lead from the receiving space for the mass into a chamber arranged between the piston crown and the pressure piece. This chamber communicates with the atmosphere via ventilation ducts, so that the air from the receiving space for the mass can escape through the opening into the chamber and from there into the atmosphere via the ventilation ducts. The openings in the piston crown are dimensioned so small that the air, but not the mass, can get into the chamber through these openings.

Nebst dieser Problematik der Entlüftung kommt insbesondere bei der Verwendung von Mehrkomponenten-Massen hinzu, dass die Komponenten in voneinander getrennten Behältern angeordnet sind und erst unmittelbar vor der Anwendung in der gewünschten Menge und in dem für die chemische Reaktion erforderlichen Mischungsverhältnis zusammengebracht werden. Diese Behälter werden meist in Spezialgeräten verarbeitet, welche mittels miteinander gekoppelter Kolbenstangen einen gleichzeitigen Vorschub der Auspresskolben in den verschiedenen Behältern bewirken. Damit das erforderliche Mischungsverhältnis während des gesamten Auspressvorganges genau eingehalten wird, müssen sich die Auspresskolben zu Beginn des Auspressvorganges in einer bestimmten axialen Stellung befinden. Ist dies nicht der Fall, so wird zu Beginn des Auspressvorganges nur die eine Komponente herausgepresst, so dass die erforderliche Mischung nicht zustande kommt und die Masse unbrauchbar ist. Die für das Einbringen der Komponenten in die Behälter verwendeten Abfüllmaschinen sind jedoch hinsichtlich Dosierung der Massen relativ ungenau, so dass die erforderliche Genauigkeit der Ausgangslage der Auspresskolben beim Eindrückvorgang desselben nicht erreicht werden kann.In addition to this venting problem, in particular when using multicomponent compositions, the components are arranged in separate containers and are only brought together in the desired amount and in the mixing ratio required for the chemical reaction immediately before use. These containers are usually processed in special devices which, by means of coupled piston rods, simultaneously feed the squeeze-out pistons in the various containers. So that the required mixing ratio is exactly maintained during the entire pressing process, the pressing pistons must be in a certain axial position at the beginning of the pressing process. If this is not the case, only one component is pressed out at the start of the pressing process, so that the required mixture does not come about and the mass is unusable. The filling machines used for introducing the components into the containers are, however, relatively imprecise with regard to the metering of the masses, so that the required accuracy of the starting position of the squeeze-out pistons cannot be achieved during the pressing-in process.

Der Erfindung liegt deshalb die Aufgabe zugrunde, eine Einrichtung zu schaffen, welche unabhängig vom Füllungsgrad der Behälter eine genaue Ausgangslage des Auspresskolbens ohne Luftpolster in der Masse ermöglicht.The invention is therefore based on the object of providing a device which, regardless of the degree of filling of the containers, enables a precise starting position of the ejection piston without an air cushion in the mass.

Gemäss der Erfindung wird dies dadurch erreicht, dass die Öffnung im Kolbenboden durch das Druckstück verschliessbar ist.According to the invention, this is achieved in that the opening in the piston crown can be closed by the pressure piece.

Nach dem Einfüllen der Masse in den Behälter kann somit der Auspresskolben vom offenen Ende her in den Behälter eingeführt und unter Verdrängen der überschüssigen Masse und/oder des Luftpolsters in die im Auspresskolben enthaltene Kammer in seine vorgesehene Ausgangslage gebracht werden. Hat der Auspresskolben diese Ausgangslage erreicht, so wird die Öffnung im Kolbenboden durch das Druckstück verschlossen und ein weiteres Entweichen von Masse aus dem Aufnahmeraum dadurch verhindert. Während die Masse vom Aufnahmeraum durch die Öffnung in die Kammer strömt, wird die in der Kammer enthaltene Luft durch die Entlüftungskanäle aus der Kammer verdrängt. Die in die Kammer eingedrungene Masse kann unter Einfluss der in der Kammer enthaltenen Restluft austrocknen oder plastisch bleiben. Um dieses Austrocknen der in die Kammer gelangten Masse zu verbessern, kann das Druckstück aus einem für die Lösungsmittel der Masse durchlässigen Werkstoff bestehen. Beispielsweise das weiche, leicht verformbare Polyäthylen dichtet zwar die Masse ab, ist jedoch für das darin enthaltene, sich verflüchtigende Styrol durchlässig. Für den Kolbenboden kann dagegen das härtere, gegenüber Styrol undurchlässige Polyamid verwendet werden.After the mass has been poured into the container, the squeeze-out piston can thus be introduced into the container from the open end and be displaced into its intended starting position by displacing the excess mass and / or the air cushion into the chamber contained in the squeeze-out piston. When the ejection piston has reached this starting position, the opening in the piston crown is closed by the pressure piece and further mass escape from the receiving space is prevented. As the mass flows from the receiving space through the opening into the chamber, the air contained in the chamber is displaced from the chamber through the ventilation channels. The mass that has penetrated into the chamber can dry out or remain plastic under the influence of the residual air contained in the chamber. In order to improve this drying out of the mass that has entered the chamber, the pressure piece can consist of a material that is permeable to the solvents of the mass. For example, the soft, easily deformable polyethylene seals the mass, but is permeable to the volatile styrene contained therein. In contrast, the harder, styrene-impermeable polyamide can be used for the piston crown.

Durch die Verschliessbarkeit der Öffnung kann diese so gross dimensioniert werden, dass auch zähflüssige Massen beim Einsetzen des Auspresskolbens ohne grösseren Widerstand durch die Offnung in die Kammer verdrängt werden kann.Because the opening can be closed, it can be dimensioned so large that even viscous masses can be displaced through the opening into the chamber without greater resistance when the ejection piston is inserted.

Der für das Herauspressen der Masse aus dem Behälter erforderliche Druck ist abhängig von der Viskosität der Masse und dem Querschnitt der Austrittsöffnung und kann unter Umständen sehr hoch sein. Um ein absolut dichtes Verschliessen der Öffnung zu ermöglichen, weist zweckmässigerweise das Druckstück einen zapfenartigen Ansatz zum Verschliessen der Öffnung auf. Zur Verbesserung der Dichtwirkung können der zapfenartige Ansatz am Druckstück und die dafür vorgesehene Bohrung am Kolbenboden auch konisch ausgebildet werden.The pressure required for pressing the mass out of the container depends on the viscosity of the mass and the cross section of the outlet opening and can be very high under certain circumstances. In order to enable an absolutely tight closing of the opening, the pressure piece expediently has a peg-like extension for closing the opening. To improve the sealing effect, the peg-like extension on the pressure piece and the bore provided on the piston crown can also be conical.

Vorteilhafterweise ist das Druckstück in die Öffnung verschliessender Stellung mit dem Kolbenboden verrastbar. Durch das Verrasten des Druckstückes mit dem Kolbenboden wird sichergestellt, dass die Öffnung im Kolbenboden verschlossen bleibt. Das Verrasten des Druckstückes mit dem Kolbenboden kann beispielsweise über elastisch verformbare Rastnocken erfolgen.Advantageously, the pressure piece can be locked in the position closing the opening with the piston head. Locking the pressure piece with the piston crown ensures that the opening in the piston crown is closed remains. The pressure piece can be locked to the piston crown, for example, by means of elastically deformable locking cams.

Zum Verschliessen der Öffnung im Kolbenboden führt das Druckstück gegenüber dem Kolbenboden vorzugsweise eine axiale Bewegung aus. Damit diese definiert ist und die Öffnung erst dann verschlossen wird, wenn der Auspresskolben seine Ausgangsstellung erreicht hat ist es zweckmässig, dass das Druckstück in unverrastetem Zustand vom Kolbenboden weggewölbt ist. Beim Verschliessen der Öffnung wird das Druckstück ähnlich einer Membran vom gewölbten Zustand aus flachgedrückt. Dabei muss ein gewisser Verformungswiderstand überwunden werden. Durch das Flachdrücken des Druckstückes wird dieses gleichzeitig im Durchmesser aufgeweitet. Diese radiale Aufweitung kann für eine gleichzeitige Verbesserung der Abdichtung des Auspresskolbens gegenüber dem Behälter ausgenutzt werden.To close the opening in the piston crown, the pressure piece preferably executes an axial movement with respect to the piston crown. So that this is defined and the opening is only closed when the ejection piston has reached its starting position, it is expedient that the pressure piece is arched away from the piston head in the non-locked state. When the opening is closed, the pressure piece is flattened like a membrane from the curved state. A certain amount of deformation resistance must be overcome. By flattening the pressure piece, the diameter is expanded at the same time. This radial expansion can be used for a simultaneous improvement in the sealing of the squeezing piston relative to the container.

Um ein Austreten der in die Kammer gelangten Masse aus dem Auspresskolben und somit eine Verschmutzung der Umgebung zu vermeiden, ist es vorteilhaft, dass die Entlüftungskanäle im Druckstück durch den Kolbenboden verschliessbar sind. Durch dieses Verschliessen der Entlüftungskanäle wird neben der Verschmutzung der Umgebung auch eine Geruchsbelästigung durch die in der Masse enthaltenen, sich verflüchtigenden Lösungsmittel vermieden. Dieses Verschliessen der Entlüftungskanäle kann beispielsweise dadurch erfolgen, dass diese verschweisst werden, nachdem der Auspresskolben in seine Ausgangslage gebracht worden ist.In order to prevent the mass that has entered the chamber from escaping from the squeeze-out piston and thus to prevent contamination of the environment, it is advantageous that the ventilation channels in the pressure piece can be closed by the piston crown. As a result of this closing of the ventilation channels, in addition to the pollution of the environment, an odor nuisance caused by the volatilizing solvents contained in the composition is avoided. This closing of the ventilation channels can take place, for example, by welding them after the ejection piston has been brought into its initial position.

Eine weitere zweckmässige Ausführung besteht darin, dass die Entlüftungskanäle in verrastetem Zustand des Kolbenbodens verschlossen sind. Das Verschliessen der Entlüftungskanäle kann somit gleichzeitig mit dem Verrasten des Druckstückes mit dem Kolbenboden erfolgen. Um dabei den Aufbau eines Überdrucks oder das Zurückfliessen von Masse durch die Öffnung in den Aufnahmeraum zu vermeiden, wird zweckmässigerweise zuerst die Öffnung im Kolbenboden und die Entlüftungskanäle erst unmittelbar vor dem Einrasten des Druckstückes im Kolbenboden verschlossen.Another expedient embodiment consists in that the ventilation channels are closed when the piston crown is locked. The ventilation channels can thus be closed simultaneously with the locking of the pressure piece with the piston crown. In order to avoid the build-up of overpressure or the backflow of mass through the opening into the receiving space, the opening in the piston crown and the ventilation channels are expediently closed only immediately before the pressure piece snaps into the piston crown.

Für ein vollständiges Verschliessen der Entlüftungskanäle ist es vorteilhaft, wenn das Druckstück einen in der die Entlüftungskanäle verschliessenden Stellung mit dem Kolbenboden zusammenwirkenden Kragen aufweist. Dieser Kragen kann sich von der Innenseite her gegen die zylindrische Wandung des Kolbenbodens anlegen. Ist das Druckstück in seiner Ausgangslage vom Kolbenboden weggewölbt ausgebildet, so wird durch das Flachdrücken des Druckstückes der Kragen zusätzlich nach aussen gegen den Kolbenboden gepresst.For a complete closing of the ventilation channels, it is advantageous if the pressure piece has a collar which interacts with the piston head in the position closing the ventilation channels. This collar can lie against the cylindrical wall of the piston crown from the inside. If the thrust piece is arched away from the piston crown in its initial position, the collar is additionally pressed outward against the piston crown by flattening the thrust piece.

Zweckmässigerweise weist das Druckstück in Umfangsrichtung verlaufende Dichtlippen für den die Masse enthaltenden Behälter auf. Das Druckstück kann somit nach Art einer Kappe auf das rückwärtige Ende des Kolbenbodens aufgesteckt werden. Das Anbringen von Dichtlippen am Druckstück ist besonders dann zweckmässig, wenn dieses in unverformtem Zustand vom Kolbenboden weggewölbt ist, so dass es bei dem für das Verschliessen der Öffnung erfolgenden Flachdrücken radial aufgeweitet wird. Durch diese radiale Aufweitung werden die Dichtlippen zusätzlich gegen die Wandung des Behälters gepresst.The pressure piece expediently has circumferential sealing lips for the container containing the mass. The pressure piece can thus be plugged onto the rear end of the piston head in the manner of a cap. The attachment of sealing lips on the pressure piece is particularly expedient if the latter is arched away from the piston crown in the undeformed state, so that it is radially expanded when the opening is pressed flat. Due to this radial expansion, the sealing lips are additionally pressed against the wall of the container.

Der Kolbenboden bildet eine erste Abdichtung gegenüber der Behälterwandung. Infolge des hohen Auspressdruckes kann jedoch ein Teil der Masse an der in Auspressrichtung vorderen Dichtkante des Kolbenbodens vorbeiströmen. Damit dieser Teil der Masse nicht nach aussen gelangen und die Umgebung verschmutzen kann, ist es vorteilhaft, wenn der Kolbenboden Leckbohrungen aufweist, welche die Kammer mit einem vom Kolbenboden und den Dichtlippen begrenzten Ringraum verbinden. Der in diesen Ringraum eingedrungene Teil der Masse kann somit in die im Auspresskolben angeordnete Kammer abfliessen, so dass es vor den Dichtlippen nicht zu einem erhöhten Druckaufbau kommt.The piston crown forms a first seal against the container wall. As a result of the high squeezing pressure, however, part of the mass can flow past the front sealing edge of the piston crown in the squeezing direction. So that this part of the mass cannot get outside and contaminate the environment, it is advantageous if the piston crown has leak bores which connect the chamber to an annular space delimited by the piston crown and the sealing lips. The part of the mass which has penetrated into this annular space can thus flow into the chamber arranged in the squeezing-out piston, so that there is no increased pressure build-up in front of the sealing lips.

Die Erfindung soll nachstehend anhand der sie beispielsweise wiedergebenden Zeichnungen näher erläutert werden. Es zeigen:

  • Fig. 1 einen Behälter mit einem erfindungsgemässen Auspresskolben, vor dem Verschliessen der Öffnung,
  • Fig. 2 einen Querschnitt durch den Auspresskolben gemäss Fig. 1, entlang der Linie 11-11,
  • Fig. 3 den Auspresskoiben gemäss Fig. 1 und 2, nach dem Verschliessen der Öffnung,
  • Fig. 4 eine weitere Ausführung eines erfindungsgemässen Auspresskolbens, vor dem Verschliessen der Öffnung,
  • Fig. 5 Den Auspresskolben gemäss Fig. 4, nach dem Verschliessen der Öffnung.
The invention will be explained in more detail below with reference to the drawings, for example. Show it:
  • 1 shows a container with an ejection piston according to the invention, before the opening is closed,
  • 2 shows a cross section through the ejection piston according to FIG. 1, along the line 11-11,
  • 3 shows the squeezing bobbins according to FIGS. 1 and 2 after the opening has been closed,
  • 4 shows a further embodiment of an ejection piston according to the invention, before the opening is closed,
  • Fig. 5 The ejection piston according to Fig. 4, after closing the opening.

Der aus den Fig. 1 bis 3 ersichtliche Auspresskolben besteht aus einem insgesamt mit 1 bezeichneten Kolbenboden und einem insgesamt mit 2 bezeichneten Druckstück. Der Auspresskolben ist in einem insgesamt mit 3 bezeichneten Behälter verschiebbar angeordnet. Der Kolbenboden 1 weist eine mit der Wandung des Behälters 3 in Berührung stehende Dichtkante 1 a auf. Der Kolbenboden 1 ist im mittleren Bereich mit einem Einstich 1 versehen, in dem ein Dichtring 4 angeordnet ist. Ferner weist der Kolbenboden 1 eine zentrale Öffnung 1 auf. Die Öffnung 1 ist auf der einen Seite des Kolbenbodens 1 mit Rastnocken 1d versehen. Auf der gegenüberliegenden Seite weist der Kolbenboden 1 in axialer Richtung verlaufende Rippen 1 e auf. Der Behälter 3 weist ein Mundstück 3a auf, das stirnseitig mit einer zerstörbaren Folie 3b verschlossen ist. Das Mundstück 3a weist ausserdem ein Gewinde 3c zum Aufschrauben eines nicht dargestellten Auspressrohres auf. Im rückwärtigen Endbereich ist der Behälter 3 an seiner Innenseite mit einer Anphasung 3d versehen. Diese Anphasung 3d erleichtert das Einführen des Auspresskolbens. Der Behälter 3 ist mit einer Masse 5 gefüllt. Das Druckstück 2 ist in der in Fig. 1 dargestellen Ausgangslage vom Kolbenboden 1 weggewölbt ausgebildet. Das Druckstück 2 weist einen zapfenförmigen Ansatz 2a auf, der über einen Teil seiner Länge im Durchmesser der Öffnung 1c im Kolbenboden 1 entspricht. Das freie Ende des Ansatzes 2a ist mit einem Wulst 2b versehen. Der Wulst 2b bildet zusammen mit den Rastnocken 1d einen Rastverschluss. Auf der dem Ansatz 2a gegenüberliegenden Seite ist das Druckstück 2 mit einer Vertiefung 2c versehen. Zwischen dem Kolbenboden 1 und dem Druckstück 2 befindet sich eine Kammer 6. Die Kammer 6 steht in der in Fig. 1 dargestellten Stellung über die Öffnung 1 in Verbindung mit dem Aufnahmeraum für die Masse 5. Wenn nun der Auspresskolben mit Hilfe eines Stempels 7 gegen das Mundstück 3a des Behälters 3 verschoben wird, gelangt ein Teil der Masse 5 in die Kammer 6. Somit lässt sich die Ausgangslage des Auspresskolbens genau einstellen. Ist diese Ausgangslage erreicht, so wird das Druckstück 2 mit Hilfe eines Stössels 8 gegen den Kolbenboden 1 gepresst. Dabei verschliesst der Ansatz 2a die Offnung 1 und verhindert, dass weitere Masse 5 in die Kammer 6 gelangen kann. Das Druckstück 2 wird in dieser, in Fig. 3 dargestellten Lage über die Rastnocken 1d und den Wulst 2b verrastet. Der in die Kammer 6 gelangte Teil der Masse wird dabei eingeschlossen. Das Druckstück 2 stützt sich über die Rippen 1e am Kolbenboden 1 ab. Durch die Verformung des Druckstückes 2 ist dieses radial aufgeweitet worden und presst nun das rückwärtige Ende des Kolbenbodens 1 gegen die Wandung des Behälters 3.The squeeze-out piston shown in FIGS. 1 to 3 consists of a piston crown, generally designated 1, and a pressure piece, generally designated 2. The squeezing piston is arranged displaceably in a container denoted overall by 3. The piston crown 1 has a sealing edge 1 a which is in contact with the wall of the container 3. The piston crown 1 is provided in the central area with a recess 1 in which a sealing ring 4 is arranged. Furthermore, the piston crown 1 has a central opening 1. The opening 1 is provided on one side of the piston head 1 with locking cams 1d. On the opposite side, the piston crown 1 has ribs 1 e running in the axial direction. The container 3 has a mouthpiece 3a, which is closed at the end with a destructible film 3b. The mouthpiece 3a also has a thread 3c for screwing on a squeeze tube, not shown. In the rear end region, the container 3 is provided with a chamfer 3d on its inside. This chamfer 3d facilitates the insertion of the squeezing piston. The container 3 is filled with a mass 5. In the initial position shown in FIG. 1, the pressure piece 2 is arched away from the piston head 1. The pressure piece 2 has a peg-shaped projection 2a, which has a diameter of part over its length Opening 1c in the piston crown 1 corresponds. The free end of the neck 2a is provided with a bead 2b. The bead 2b forms a snap lock together with the locking cams 1d. The pressure piece 2 is provided with a recess 2c on the side opposite the projection 2a. Between the piston crown 1 and the pressure piece 2 there is a chamber 6. The chamber 6 is in the position shown in FIG. 1 via the opening 1 in connection with the receiving space for the mass 5 the mouthpiece 3a of the container 3 is displaced, part of the mass 5 reaches the chamber 6. The starting position of the ejection piston can thus be set precisely. If this starting position is reached, the pressure piece 2 is pressed against the piston crown 1 with the aid of a plunger 8. The approach 2a closes the opening 1 and prevents further mass 5 from entering the chamber 6. The pressure piece 2 is locked in this position shown in FIG. 3 via the locking cams 1d and the bead 2b. The part of the mass that has entered chamber 6 is enclosed. The pressure piece 2 is supported on the piston head 1 via the ribs 1e. Due to the deformation of the pressure piece 2, it has been radially expanded and now presses the rear end of the piston head 1 against the wall of the container 3.

Der aus Fig. 4 und 5 ersichtliche Auspresskolben besteht aus einem insgesamt mit 11 bezeichneten Kolbenboden und einem insgesamt mit 12 bezeichneten Druckstück. Der Kolbenboden 11 weist eine mit der Wandung des Behälters 3 in Kontakt stehende Dichtkante 11 a auf. Im mittleren Bereich ist der Kolbenboden 11 mit wenigstens einer radial verlaufenden Leckbohrung 11 b versehen. Ein von der Dichtkante 11a nicht abgestreifter Teil der Masse kann über einen Ringraum 17 und die Leckbohrung 11 b in die zwischen dem Kolbenboden 11 und dem Druckstück 12 angeordnete Kammer 16 gelangen. Der Kolbenboden 11 weist ebenfalls eine zentrale Öffnung 11c auf. Auf der Seite der auszupressenden Masse 5 ist der Kolbenboden 11 mit Rastnocken 11d d versehen. Auf der gegenüberliegenden Seite weist der Kolbenboden 11 in axialer Richtung verlaufende Rippen 11e auf. Das verformbare Druckstück 12 ist mit einem zylindrischen Ansatz 12a versehen, der über einen Teil seiner Länge im Durchmesser der Öffnung 11c entspricht. Der Ansatz 12a ist mit einer Rastnut 12b versehen. Die gegenüberliegende Seite des Druckstückes 12 weist eine Vertiefung 12c auf. Ausserdem ist das Druckstück 12 mit wenigstens einem Entlüftungskanal 12d versehen. Dieser Entlüftungskanal 12d dient dem Entweichen der in der Kammer 16 vorhandenen Luft. Der den Kolbenboden 11 umfassende Bereich des Druckstückes 12 ist mit Dichtlippen 12e versehen. Auf der Innenseite weist das Druckstück 11 einen in axialer Richtung weisenden Kragen 11f auf. Der Aussendurchmesser dieses Kragens 11f ist so auf den Innendurchmesser des Kolbenbodens 12 abgestimmt, dass dazwischen in der in der in Fig. 4 dargestellten, unverrasteten Stellung ein Ringspalt bleibt, durch den die Luft über den Entlüftungskanal 12d in die Atmosphäre entweichen kann.The squeeze-out piston shown in FIGS. 4 and 5 consists of a piston head, generally designated 11, and a pressure piece, generally designated 12. The piston crown 11 has a sealing edge 11 a which is in contact with the wall of the container 3. In the central region, the piston crown 11 is provided with at least one radially running leak hole 11 b. A part of the mass which is not stripped from the sealing edge 11a can reach the chamber 16 arranged between the piston crown 11 and the pressure piece 12 via an annular space 17 and the leak hole 11b. The piston crown 11 also has a central opening 11c. On the side of the mass 5 to be pressed out, the piston head 11 is provided with locking cams 11d d. On the opposite side, the piston crown 11 has ribs 11e running in the axial direction. The deformable pressure piece 12 is provided with a cylindrical projection 12a, which corresponds over part of its length in diameter to the opening 11c. The approach 12a is provided with a locking groove 12b. The opposite side of the pressure piece 12 has a recess 12c. In addition, the pressure piece 12 is provided with at least one ventilation channel 12d. This ventilation channel 12d serves to escape the air present in the chamber 16. The area of the pressure piece 12 which surrounds the piston crown 11 is provided with sealing lips 12e. On the inside, the pressure piece 11 has a collar 11f pointing in the axial direction. The outside diameter of this collar 11f is matched to the inside diameter of the piston crown 12 in such a way that an annular gap remains in the non-latched position shown in FIG. 4, through which the air can escape into the atmosphere via the ventilation duct 12d.

In Fig. 5 ist das Druckstück 12 über die Rastnut 12b und die Rastnocken 11 d mit dem Kolbenboden 11 verrastet. Die Öffnung 11 im Kolbenboden 11 werden dabei durch den Ansatz 12a verschlossen. Am Ende des Verformungsweges des Druckstückes 12 werden auch der Entlüftungskanal 12d durch den mit dem Kolbenboden 11 zusammenwirkenden Kragen 12f verschlossen. Dadurch wird ein Entweichen von Dämpfen von der in die Kammer 16 gelangten Masse in die Atmosphäre verhindert.5, the pressure piece 12 is locked to the piston crown 11 via the locking groove 12b and the locking cams 11d. The opening 11 in the piston crown 11 is closed by the extension 12a. At the end of the deformation path of the pressure piece 12, the ventilation channel 12d is also closed by the collar 12f which interacts with the piston head 11. This prevents vapors from escaping from the mass into chamber 16 into the atmosphere.

Claims (10)

1. A multipart press-out piston for substantially cylindrical containers which contain plastic substances with a piston head (1, 11) which is arranged on the side of the substance that is to be pressed out, a thrust piece (2, 12) which supports the piston head on the side remote from the substance (5) as well as a chamber (6, 16) which is arranged between the piston head and the thrust piece and which communicates, by way of at least one aperture (1 c, 11 c) in the piston head (1, 11), with the reception space for the substance (5) and, by way of at least one venting channel (12d), with the atmosphere, characterised in that the aperture (1c, 11c) in the piston head (1, 11) is closable by the thrust piece (2, 12).
2. A press-out piston according to claim 1, characterised in that the thrust piece (2, 12) has a pin- like projection (2a, 12a) for the closing of the aperture (1 c, 11c).
3. A press-out piston according to one of claims 1 or 2, characterised in that the thrust piece (2, 12) is lockable with the piston head (1, 11) in the position which closes the aperture (1 c, 11 c).
4. A press-out piston according to one of claims 1 to 3, characterised in that the thrust piece (2, 12) in the non-locked state is arched away from the piston head (1, 11).
5. A press-out piston according to one of claims 1 to 4, characterised in that the venting channels (12d) in the thrust piece (12) are closable by the piston head (11).
6. A press-out piston according to claim 5, characterised in that the venting channels (12d) are closed in the locked state of the piston head (11).
7. A press-out piston according to claim 5 or 6, characterised in that the thrust piece (12) has a collar (12f) which co-operates with the piston head (11) in the position which closes the venting channels (12d).
8. A press-out piston according to one of claims 1 to 7, characterised in that the thrust piece (12) has sealing lips (12e) extending in the circumferential direction, for the container (3) which contains the substance (5).
9. A press-out piston according to claim 8, characterised in that the piston head (11) has leakage bores (11 b) which connect the chamber (16) to an annular space (17) which is bounded by the piston head (11) and the sealing lips (12e).
EP87810284A 1986-05-09 1987-05-05 Press-out piston having a storage chamber Expired EP0245210B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87810284T ATE41328T1 (en) 1986-05-09 1987-05-05 PRESSING PISTON WITH ACCUMULATION CHAMBER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3615659 1986-05-09
DE19863615659 DE3615659A1 (en) 1986-05-09 1986-05-09 PRESSURE PISTON WITH STORAGE CHAMBER

Publications (2)

Publication Number Publication Date
EP0245210A1 EP0245210A1 (en) 1987-11-11
EP0245210B1 true EP0245210B1 (en) 1989-03-15

Family

ID=6300472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87810284A Expired EP0245210B1 (en) 1986-05-09 1987-05-05 Press-out piston having a storage chamber

Country Status (6)

Country Link
US (1) US4792065A (en)
EP (1) EP0245210B1 (en)
JP (1) JP2504463B2 (en)
AT (1) ATE41328T1 (en)
DE (2) DE3615659A1 (en)
ES (1) ES2007553B3 (en)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0344491B1 (en) * 1988-06-03 1992-12-23 Wilhelm A. Keller Dispensing cartridge with a supply cylinder and an expulsion piston
FR2649967B1 (en) * 1989-07-19 1991-09-20 Cebal METHOD OF INTRODUCING A SEALED SLIDING LID INTO A TUBULAR BODY AND CORRESPONDING DEVICE
CA2027786C (en) * 1989-10-31 1997-01-28 Koichi Sugita Combination container and pump
DE59103399D1 (en) * 1990-06-21 1994-12-08 Wilhelm A Keller Discharge cartridge with storage cylinder and delivery piston.
EP0497739B1 (en) * 1991-01-29 1996-10-09 Wilhelm A. Keller Dispensing cartridge with a supply cylinder and an expulsion piston
DE69227520T2 (en) * 1991-09-16 1999-05-06 Procter & Gamble TURN SLEEVE WITH SPECIAL GASKETS FOR THE PISTON AND METHOD FOR FILLING THE TURN SLEEVE
JP2772188B2 (en) * 1992-01-23 1998-07-02 武蔵エンジニアリング株式会社 Liquid dispenser syringe plunger
EP0579492B1 (en) * 1992-07-16 1996-10-09 Riso Kagaku Corporation Container having means for preventing refilling
IT1256628B (en) * 1992-12-04 1995-12-12 DISPENSER OF FLUID SUBSTANCES, WITH DEFORMABLE HEAD
GB2274137B (en) * 1993-01-08 1996-10-02 Jebron Ltd Door control device
DE4311876A1 (en) * 1993-04-10 1994-10-13 Hilti Ag Pistons for dispensing devices
DE9319019U1 (en) * 1993-12-11 1994-01-27 Upat Gmbh & Co, 79312 Emmendingen Discharge cartridge
US6443333B1 (en) * 1994-09-13 2002-09-03 Arthur Vanmoor Caulking cartridge with afterflow prevention and improved purging of cartridge contents
US5622288A (en) * 1995-06-12 1997-04-22 Sonoco Products Company Cartridge plunger with surface cleaning skirt
US5878922A (en) * 1997-07-09 1999-03-09 Sunoco Products Company Self venting plunger
RU2211792C2 (en) * 1997-10-15 2003-09-10 Локтайт Корпорейшн Holder (versions) and set for keeping and admitting unit dose
DE19830517C1 (en) * 1998-07-08 1999-07-22 Wolfgang Peter Schmitz Appliance for semi-tinting hair, with cylindrical tint-container
US6343718B1 (en) 1998-10-15 2002-02-05 Loctite Corporation Unit dose dispense package
DE20010417U1 (en) * 2000-06-09 2001-10-11 Sulzer Chemtech Ag Winterthur Bleeding device for a piston for a cartridge
WO2003050012A1 (en) * 2001-12-10 2003-06-19 Tah Industries, Inc. Dispensing cartridge with tortuous vent path
US20050029306A1 (en) * 2002-12-06 2005-02-10 Brennan Robert Charles Dispensing cartridge with tortuous vent path
US6899254B1 (en) * 2004-01-20 2005-05-31 Plas-Pak Industries, Inc. Venting seal for dispenser
US7621428B2 (en) * 2005-07-01 2009-11-24 Nordson Corporation Dispensing cartridge with vented piston
JP2009511376A (en) * 2005-10-14 2009-03-19 スリーエム イノベイティブ プロパティズ カンパニー Plunger for cartridge and plunger assembly, system for storing substance, and method for filling and sealing substance in delivery system
US7874464B2 (en) * 2006-09-07 2011-01-25 L'oreal Venting system for a product dispensing device
DE102006053453B4 (en) * 2006-11-11 2010-05-06 Kettenbach Gmbh & Co. Kg Filled container with a piston and method for filling and venting a container
NL2000634C2 (en) * 2007-05-07 2008-11-10 Bema Kunststoffen B V Container and system for storing a liquid.
GB0721774D0 (en) * 2007-11-07 2007-12-19 3M Innovative Properties Co one-piece vented piston
DE202007016706U1 (en) 2007-11-28 2009-04-09 Inatec Gmbh Piston wiper plate for squeezing device for bag smelter and associated bag smelter
JP5145906B2 (en) * 2007-11-30 2013-02-20 トヨタ自動車株式会社 Fuel injection nozzle
EP2364123B1 (en) * 2008-10-24 2016-12-28 DENTSPLY International Inc. Container for storing and dispensing a flowable material
CA2690171A1 (en) * 2009-02-11 2010-08-11 Sulzer Mixpac Ag Cartridge piston with venting device
WO2011017181A1 (en) 2009-08-04 2011-02-10 3M Innovative Properties Company Dispensing device with pressure release
USD658763S1 (en) 2010-02-02 2012-05-01 3M Innovative Properties Company Dental capsule
US10427277B2 (en) 2011-04-05 2019-10-01 Ingersoll-Rand Company Impact wrench having dynamically tuned drive components and method thereof
US9566692B2 (en) * 2011-04-05 2017-02-14 Ingersoll-Rand Company Rotary impact device
US9463557B2 (en) 2014-01-31 2016-10-11 Ingersoll-Rand Company Power socket for an impact tool

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1953109A (en) * 1931-11-07 1934-04-03 Sam D Heron Piston
US2371332A (en) * 1942-09-25 1945-03-13 James J Jacobson Dispensing container
US3164303A (en) * 1961-12-04 1965-01-05 Semco Res Inc Storage and mixing cartridge
GB2072755B (en) * 1980-03-28 1984-02-01 Nat Res Dev Dispensing apparatus and method
JPS59153874U (en) * 1983-03-30 1984-10-16 株式会社吉野工業所 Creamy storage container
DE3435576A1 (en) * 1984-09-27 1986-04-10 Josef Wischerath GmbH & Co KG, 5000 Köln Dispenser for pasty products

Also Published As

Publication number Publication date
ES2007553B3 (en) 1993-09-16
DE3760062D1 (en) 1989-04-20
JP2504463B2 (en) 1996-06-05
ATE41328T1 (en) 1989-04-15
US4792065A (en) 1988-12-20
DE3615659A1 (en) 1987-11-12
EP0245210A1 (en) 1987-11-11
JPS6322375A (en) 1988-01-29

Similar Documents

Publication Publication Date Title
EP0245210B1 (en) Press-out piston having a storage chamber
EP0663348B1 (en) Device for emptying a tubular bag
EP0111798B1 (en) Automatic closure for a flexible container
EP1140259B1 (en) Multi-chambered ampoule for dispensing a mixture comprising several substances
EP1112779B1 (en) Opener for opening two tubular bags each comprising a paste
EP2396237B1 (en) Discharge device with tube
DE8809184U1 (en) Multi-component mixing capsule with ejection device for the mixed mass, especially for dental purposes
DE3611690A1 (en) DISCHARGE DEVICE FOR MIXED MEDIA
CH671204A5 (en)
EP0254969A1 (en) Apparatus for extruding pastes
DE2918121A1 (en) COMPOSITE CARTRIDGE AND DEVICE FOR DOSING THE CONTENT TO BE PRESSED
DE3920537C2 (en) Multi-component mixing capsule with ejection device for the mixed mass, in particular for dental purposes
WO2005016551A1 (en) Dispensing pack
CH661109A5 (en) Method for producing a bonded socket-pipe connection and a means, which is suitable for this purpose, for carrying out the method
EP0094033B1 (en) Container for plastics masses
EP0144584B1 (en) Holder for injecting a bonding agent into a bore-hole for the anchoring of a fixing device
EP0340493B1 (en) Container for viscous masses
DE3420323A1 (en) Dispensing device for a plurality of flowable material components
DE2302364B2 (en) Closure made of elastic material serving as a push-out piston for plastic mass for a hollow cylindrical extrusion container
DE3437574C2 (en)
EP1029513B1 (en) Mixing and discharging capsule
DE3202072A1 (en) Container closure
EP1605857B1 (en) Mixing capsule with forced activation
DE60120603T2 (en) A prefilled telescopic multi-chamber ampoule
DE102022129137A1 (en) Multi-chamber cartridge

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

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

17P Request for examination filed

Effective date: 19871205

17Q First examination report despatched

Effective date: 19880623

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

REF Corresponds to:

Ref document number: 41328

Country of ref document: AT

Date of ref document: 19890415

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

REF Corresponds to:

Ref document number: 3760062

Country of ref document: DE

Date of ref document: 19890420

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 87810284.7

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

Ref country code: SE

Payment date: 19970225

Year of fee payment: 11

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

Ref country code: GB

Payment date: 19970425

Year of fee payment: 11

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

Ref country code: BE

Payment date: 19980402

Year of fee payment: 12

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

Ref country code: CH

Payment date: 19980409

Year of fee payment: 12

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

Ref country code: GB

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

Effective date: 19980505

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

Ref country code: SE

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

Effective date: 19980506

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980505

EUG Se: european patent has lapsed

Ref document number: 87810284.7

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

Ref country code: ES

Payment date: 19990507

Year of fee payment: 13

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

Ref country code: LI

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

Effective date: 19990531

Ref country code: CH

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

Effective date: 19990531

Ref country code: BE

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

Effective date: 19990531

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

Ref country code: NL

Payment date: 19990531

Year of fee payment: 13

BERE Be: lapsed

Owner name: HILTI A.G.

Effective date: 19990531

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: ES

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

Effective date: 20000506

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

Ref country code: FR

Payment date: 20000510

Year of fee payment: 14

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

Ref country code: AT

Payment date: 20000511

Year of fee payment: 14

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

Ref country code: NL

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

Effective date: 20001201

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

Effective date: 20001201

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

Ref country code: AT

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

Effective date: 20010505

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

Ref country code: FR

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

Effective date: 20020131

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20030203

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

Ref country code: DE

Payment date: 20030515

Year of fee payment: 17

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

Ref country code: DE

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

Effective date: 20041201

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050505