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WO1995028337A1 - Dipositif d'etancheite pour distributeur de fluide - Google Patents

Dipositif d'etancheite pour distributeur de fluide Download PDF

Info

Publication number
WO1995028337A1
WO1995028337A1 PCT/GB1995/000831 GB9500831W WO9528337A1 WO 1995028337 A1 WO1995028337 A1 WO 1995028337A1 GB 9500831 W GB9500831 W GB 9500831W WO 9528337 A1 WO9528337 A1 WO 9528337A1
Authority
WO
WIPO (PCT)
Prior art keywords
plug
cartridge
plunger
product
dispenser
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.)
Ceased
Application number
PCT/GB1995/000831
Other languages
English (en)
Inventor
Quentin Sholto Grant
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.)
ADLOCK PACKAGING Ltd
Original Assignee
ADLOCK PACKAGING Ltd
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 ADLOCK PACKAGING Ltd filed Critical ADLOCK PACKAGING Ltd
Priority to AU22187/95A priority Critical patent/AU2218795A/en
Publication of WO1995028337A1 publication Critical patent/WO1995028337A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/01—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B65D83/76—Containers or packages with special means for dispensing contents for dispensing fluent contents by means of a piston
    • 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

  • This invention relates to a sealing arrangement for sealing a dispenser containing a flowable product, to a dispenser provided with such a sealing arrangement and to a method of sealing the dispenser.
  • Various flowable products such as adhesives and resins, are supplied to the user in a dispenser having a barrel or cartridge with an open charging end through which the product is introduced into the cartridge and a closed dispensing end provided with an openable nozzle through which the product is dispensed in use of the dispenser.
  • a dispenser having a barrel or cartridge with an open charging end through which the product is introduced into the cartridge and a closed dispensing end provided with an openable nozzle through which the product is dispensed in use of the dispenser.
  • a resilient sealing plug attached to the end of a plunger which is inserted into the cartridge and moved to bring the plug into contact with the resin whilst bleeding the trapped air from between the plug and the product.
  • the nozzle In use of the dispenser, the nozzle is opened and the plunger is displaced in the cartridge to force the product out of the nozzle whilst maintaining the sealing action of the plug.
  • Some products, such as adhesives, are supplied to the user in the form of two flowable components which are mixed together at the point of use, so as to react and form the desired end product.
  • Such products may be supplied in dispensers having a pair of cartridges containing the respective components of the product each of which is sealed from the air in the manner described above.
  • FIG. 1 of the accompanying drawings illustrates in perspective view an example of a known dispenser for dispensing two flowable resinous substances to be mixed at the point of use, such dispenser comprising a pair of cylindrical cartridges 20 which are rigidly connected together and each of which has an open end 21 for receiving a respective plunger 22 of a double plunger assembly 23 and a closed end formed with an openable nozzle 24.
  • the pair of cartridges 20 are rigidly connected together to form a single unit and the plungers 22 of the plunger assembly 23 are rigidly connected together by a bridge 26 so as to be adapted to be depressed simultaneously into the respective cartridges 20 to force respective resinous materials contained in the cartridges out of the opened nozzles 24 of the cartridges 20 in use of the dispenser.
  • Resin is loaded into the cartridges 20 in a factory or the like through the open ends 21 which receive the plungers 22 with the nozzles 24 sealed.
  • the plungers 22 of the plunger assembly 23 are inserted into the cartridges 20. It is desirable for any air trapped in the cartridge 20 between the plunger 22 and the resin to be exhausted as the plunger is depressed into contact with the resin in the cartridges.
  • longitudinal air passages are defined by projecting moulded strips 27 which are formed on the internal wall surface of the cartridges 20. The strips 27 serve to deform flexible plugs 28 carried at the free ends of the respective plungers 22 so that air can escape through the air passage between the plug and the internal wall of the cartridge. Because of this arrangement a cartridge 20 of known dispensers of this type can only be
  • HEET RULE 26 loaded with a predetermined volume of the resinous substance, the volume being determined by the depth to which the strips 27 extend into the cartridge. If the volume of resin loaded into the cartridge 20 extends as far as the strips 27, then, when the plungers 22 are inserted into the cartridge, the resin will not be sealed in the cartridge in an air tight manner because the resulting air passages will allow air to penetrate to the resin. Thus, purpose-made dispensers need to be provided for each desired volume of resin to be held in the cartridges. Accordingly, a 5ml cartridge, a 10ml cartridge, a 15ml cartridge and a 25ml cartridge would all require different dispensers.
  • the known dispenser requires the volume of resin to be loaded into the cartridge 20 to be accurately determined since, if less than the predetermined volume of resin is loaded into the cartridge, then not all of the air will be evacuated from the cartridge when the plunger assembly 23 is inserted into the cartridge as the air escape passage will, effectively, be too short.
  • the present invention provides a sealing arrangement for sealing a dispenser having a cartridge with an open charging end through which a flowable product is introduced into the dispenser and a closed dispensing end provided with an openable nozzle through which the product is dispensed in use of the dispenser, which arrangement comprises a plug for insertion into the cartridge in sealing engagement with the wall of
  • SUBSTITUTE SHEET (RULE 26 ⁇ the cartridge after a desired volume of the product has been introduced into the cartridge, and a plunger for insertion into the cartridge into abutment with the plug and for displacement in the cartridge to push the plug along the cartridge towards the product while allowing air trapped between the plug and the product to escape, through a bleed passage in the plug, the plunger carrying a stopper which moves into sealing engagement with the bleed passage of the plug to seal the plug when all air between the plug and the product has escaped through the bleed passage and movement of the plug is resisted by the flowable product.
  • the invention provides a method of sealing a dispenser having a cartridge with an open charging end through which a flowable product is introduced into the dispenser and a closed dispensing end provided with an openable nozzle through which the product is dispensed in use of the dispenser, which method comprises: introducing a desired volume of the product into the cartridge, inserting a plug into the cartridge in sealing engagement with the wall of the cartridge, inserting a plunger into the cartridge into abutment with the plug, displacing the plunger in the cartridge to push the plug along the cartridge towards the product while allowing air trapped between the plug and the product to escape through a bleed passage in the plug, and urging the plunger against the stopper when the plug encounters the product and all air between the plug and the product has escaped through the bleed passage to bring a stopper carried by the plunger into sealing engagement with the bleed passage of the plug.
  • Figure 1 is a perspective view of a known dispenser comprising a pair of cartridges and a plunger assembly, parts of the cartridges being shown in phantom;
  • Figure 2 is a detail of an air passage strip formed on an internal wall surface of a cartridge such as the cartridge shown in the dispenser of Figure 1;
  • Figure 3 is a side view of one end of a plunger and a cross-sectional view through a plug, the plunger end and the plug comprising a sealing arrangement embodying the present invention, the sealing arrangement being shown in an open abutting configuration;
  • Figure 4 shows the sealing arrangement of Figure 3 in a closed and locked configuration.
  • one embodiment of a sealing arrangement according to the present invention comprises a plug 1 and a plunger 2A having a plunger end 2 carrying a projecting stopper 3.
  • the plug 1 is formed of resilient material, such as a plastics material, and comprises a circular concave plug surface 4 from the periphery of which a cylindrical wall 5 extends to define a cupular structure.
  • An air bleed passage 6 is formed through the plug 1 at the centre of the plug surface , the passage 6 extending through a boss 7 which is formed at the centre of the plug and projects into the cupular structure.
  • the air bleed passage 6 has three distinct regions, a first region 8 immediately adjacent the plug surface 4 being cylindrical and having a diameter in the order of 1mm. In a second region 9, the bore 6 widens to form a frusto-conical region. The second region 9 merges into a third region 10 which is cylindrical and has a diameter of approximately 3mm.
  • the depth of the bore 6 from the plug surface 4 to the opening at the surface of the boss 7 is of the order of 3mm, each region 8, 9, 10 having a depth of the order of 1mm.
  • the outer surface of the cylindrical wall 5 of the plug l is formed with two annular corrugations 11, 12 which are of substantially the same diameter as the internal diameter of a cartridge (not shown in Figures 3 and 4) in which the plug is to be fitted.
  • the outer surface of the cylindrical wall 5 meets the plug surface 4 at an acute circular edge 13, the edge being effectively tapered and therefore being readily deformable.
  • the diameter of the edge 11 is slightly greater than the internal diameter of the cartridge in which the plug 1 is to be inserted, such that the edge 13 sealingly engages the cartridge in an air tight manner.
  • the inside surface of the cylindrical wall 5 is formed with a single annular projection or corrugation 14.
  • the plunger end 2 comprises a circular platform 15 in which is formed a circumferential annular depression 16.
  • the end surface 17 of the platform carries at its centre the projecting stopper 3.
  • the stopper 3 is configured and dimensioned to fit snugly in the air bleed passage 6 of the plug 1 as shown in Figure 4.
  • the stopper 3 is thus received in the air bleed passage 6, the internal annular corrugation 14 of the plug 1 is received in the external annular depression 16 of the plunger end 2, thus firmly retaining and locking the plug 1 on the plunger end 2.
  • the stopper 3 fits in the air bleed passage 6 in an air tight manner so that, when the plug 1 is inserted in a cartridge of a dispenser and the plunger end 2 is driven into the plug 1, no air can pass through the plug 1 via the air bleed passage 6 or around the plug 1 because of the stopper 3 in the bore 6 and the sealing engagement of the acute edge 13 of the plug with the cartridge wall.
  • the platform 15 has a chamfered circumferential edge 18 which extends from the annular depression 16 to the main surface of the platform 15.
  • a resin is loaded into a cartridge to a desired level, a nozzle of the cartridge being sealed.
  • the cartridge is oriented vertically with the nozzle lowermost.
  • the plug 1 is inserted in the cartridge so that the plug surface 4 faces the resin in the cartridge.
  • the plunger end 2 is placed behind the plug 1 such that the chamfered edge 18 abuts the annular projection 14. In this position, the stopper 3 is not yet engaged in the air bleed passage 6 and, indeed, there is an air gap such that air can pass freely through the passage
  • resin may be loaded into a cartridge up to any desired volume without the provision of air passages of a particular length.
  • a cartridge of the same size can be used for varying volumes such as 5ml, 10ml, 15ml or 25ml.
  • the material chosen for the plug 1 and plunger end 2 can be selected to determine the resistance required.
  • the co-operating resistance between the chamfered edge 18 and the projection 14 can be tailored accordingly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

Un dispositif d'étanchéité, destiné à une cartouche de distributeur d'un produit fluide, comprend: un bouchon (1), qui s'encastre dans cette cartouche contenant le fluide et présente un passage d'extraction d'air (6) par lequel l'air enfermé entre le bouchon et le produit peut sortir quand on bouche la cartouche, ainsi qu'un plongeur (2) supportant un butoir (3), ce plongeur étant mobile par rapport au bouchon entre une position de sortie, où il vient buter sur celui-ci pour le pousser dans la cartouche vers le produit, et une position d'étanchéité où le butoir entre en prise de façon étanche dans le passage d'extraction d'air, ce plongeur passant de la position de sortie à celle d'étanchéité quand le bouchon se heurte à une résistance au mouvement de la part du produit fluide contenu dans la cartouche, lorsque tout l'air présent entre le bouchon et le produit a été chassé.
PCT/GB1995/000831 1994-04-13 1995-04-12 Dipositif d'etancheite pour distributeur de fluide Ceased WO1995028337A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU22187/95A AU2218795A (en) 1994-04-13 1995-04-12 Sealing a flowable product in a dispenser

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9407627A GB9407627D0 (en) 1994-04-13 1994-04-13 Sealing a flowable product in a dispenser
GB9407627.0 1994-04-13

Publications (1)

Publication Number Publication Date
WO1995028337A1 true WO1995028337A1 (fr) 1995-10-26

Family

ID=10753692

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1995/000831 Ceased WO1995028337A1 (fr) 1994-04-13 1995-04-12 Dipositif d'etancheite pour distributeur de fluide

Country Status (4)

Country Link
AU (1) AU2218795A (fr)
GB (1) GB9407627D0 (fr)
WO (1) WO1995028337A1 (fr)
ZA (1) ZA953072B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1514812A1 (fr) * 2003-09-10 2005-03-16 Heraeus Kulzer GmbH Cartouche à piston évacuant
WO2007047381A1 (fr) 2005-10-14 2007-04-26 3M Innovative Properties Company Piston et ensemble piston pour une cartouche, système destiné à stocker une substance et procédé de remplissage et de scellement d'une substance dans un système de livraison
US7621428B2 (en) 2005-07-01 2009-11-24 Nordson Corporation Dispensing cartridge with vented piston
US11185391B2 (en) 2016-09-21 2021-11-30 3M Innovative Properties Company Mixer assembly and device for dispensing a dental material

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB955192A (en) * 1961-04-27 1964-04-15 Knud Abildgaard Improvements in or relating to syringe action dispensing devices
WO1990005096A1 (fr) * 1988-10-31 1990-05-17 Uni-Continental Holdings Ltd. Dispositif d'etancheite pour un distributeur d'adhesif
EP0497739A2 (fr) * 1991-01-29 1992-08-05 Wilhelm A. Keller Cartouche de décharge avec cylindre de réserve et piston de convoyage
EP0628354A1 (fr) * 1993-06-11 1994-12-14 Eurobond Adhesives Limited Bouchon d'étanchéité

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB955192A (en) * 1961-04-27 1964-04-15 Knud Abildgaard Improvements in or relating to syringe action dispensing devices
WO1990005096A1 (fr) * 1988-10-31 1990-05-17 Uni-Continental Holdings Ltd. Dispositif d'etancheite pour un distributeur d'adhesif
EP0497739A2 (fr) * 1991-01-29 1992-08-05 Wilhelm A. Keller Cartouche de décharge avec cylindre de réserve et piston de convoyage
EP0628354A1 (fr) * 1993-06-11 1994-12-14 Eurobond Adhesives Limited Bouchon d'étanchéité

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1514812A1 (fr) * 2003-09-10 2005-03-16 Heraeus Kulzer GmbH Cartouche à piston évacuant
US7621428B2 (en) 2005-07-01 2009-11-24 Nordson Corporation Dispensing cartridge with vented piston
US7909211B2 (en) 2005-07-01 2011-03-22 Nordson Corporation Dispensing cartridge with vented piston
WO2007047381A1 (fr) 2005-10-14 2007-04-26 3M Innovative Properties Company Piston et ensemble piston pour une cartouche, système destiné à stocker une substance et procédé de remplissage et de scellement d'une substance dans un système de livraison
EP1945559A4 (fr) * 2005-10-14 2012-03-21 3M Innovative Properties Co Piston et ensemble piston pour une cartouche, système destiné à stocker une substance et procédé de remplissage et de scellement d'une substance dans un système de livraison
JP2013063312A (ja) * 2005-10-14 2013-04-11 Three M Innovative Properties Co カートリッジ用プランジャ及びプランジャアセンブリ、物質を格納するシステム、並びに物質をデリバリーシステム内に充填し封止する方法
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
US11185391B2 (en) 2016-09-21 2021-11-30 3M Innovative Properties Company Mixer assembly and device for dispensing a dental material

Also Published As

Publication number Publication date
ZA953072B (en) 1996-01-05
AU2218795A (en) 1995-11-10
GB9407627D0 (en) 1994-06-08

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