EP0899206A1 - Abgabesysteme - Google Patents

Abgabesysteme Download PDF

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Publication number
EP0899206A1
EP0899206A1 EP98306300A EP98306300A EP0899206A1 EP 0899206 A1 EP0899206 A1 EP 0899206A1 EP 98306300 A EP98306300 A EP 98306300A EP 98306300 A EP98306300 A EP 98306300A EP 0899206 A1 EP0899206 A1 EP 0899206A1
Authority
EP
European Patent Office
Prior art keywords
tube
container
dispensing system
follower plate
pump
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.)
Granted
Application number
EP98306300A
Other languages
English (en)
French (fr)
Other versions
EP0899206B1 (de
Inventor
Jeffrey William Spencer
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.)
English Glass Co Ltd
Original Assignee
English Glass Co 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 English Glass Co Ltd filed Critical English Glass Co Ltd
Publication of EP0899206A1 publication Critical patent/EP0899206A1/de
Application granted granted Critical
Publication of EP0899206B1 publication Critical patent/EP0899206B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/30—Dip tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons
    • B05B11/028—Pistons separating the content remaining in the container from the atmospheric air to compensate underpressure inside the container
    • B05B11/029—Pistons separating the content remaining in the container from the atmospheric air to compensate underpressure inside the container located on top of the remaining content
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps

Definitions

  • dispensing systems including a dispenser pump having a tube extending down to the bottom of a container of flowable material to be dispensed.
  • a reciprocating plunger action of the dispenser pump draws the material up through the tube into the pump chamber at the top of the container and thence through the pump outlet, typically a spout or nozzle.
  • Dispensing systems of this general type are well known.
  • the present proposals are concerned with systems of a special type (referred to below as “the type described")in which a follower plate is provided fitting axially slidably around the tube.
  • This follower plate lies on top of the product mass and follows it down the container as dispensing proceeds to assure complete clearance of the contents.
  • the arrangement is particularly useful with thick and viscous products.
  • Our EP-A-765690 gives further background and describes a refinement of the feed tube installation for improving reliability.
  • the system is made with an integrated axially-extending body tube component whose outer surface acts as guide for the follower plate and whose lower region acts as a feed tube as aforesaid.
  • the distinctive feature is that an upper part of the body tube component provides the wall of the pump chamber, and its inner surface directly confronts or co-operates with the reciprocating plunger of the pump, e.g. with a seal against a piston thereof.
  • the body tube component may have one or more integral interior projections at the bottom of its upper part, for an inlet valve arrangement such as a ball or flap valve.
  • the projection(s) may support the inlet valve arrangement and/or provide a sealing surface for it.
  • An annular flange may be used, and can be shaped in accordance with the type of valve. For example it may be flat, downwardly-convergent or a combination of these.
  • This or other projection(s) of the body tube interior may provide a reaction abutment for a pump plunger return spring, where this is provided inside the pump chamber.
  • the body tube component's outer surface is preferably of uniform cross-section, e.g. cylindrical, over substantially its entire length. This enables a full range of axial travel for the follower plate.
  • the lower end of the body tube preferably extends to the bottom of the container, and may engage it with a mechanical interlock to inhibit lateral movement as in our EP-A-765690.
  • the upper part of the body tube (providing the pump chamber wall) preferably extends up at least as far as a top cover of the container.
  • the body tube may conveniently be located by a fixing extending through a hole in the top cover.
  • the top end of the body tube may be provided with securing formations, such as a thread or snap projections, engageable with a complementary securing component which is part of or is on the other side of the top cover to hold the body tube in position.
  • a preferred arrangement has the top of the body tube formed with an upwardly-directed reaction surface, e.g. on one or more outward flanges, to bear upwardly against the top cover.
  • the securing portion of the body tube such as a threaded or ribbed tubular extension thereof, projects above the reaction surface(s) to fit through a hole in the top cover and engage a complementary securing component which bears against the top cover from above.
  • This complementary securing component may include a pump body sleeve serving as a guide for the pump plunger.
  • vent openings can be provided through the body tube wall to allow air to permeate into the container through the pump after dispensing, compensating for the volume of dispensed product.
  • a vent opening is preferably provided immediately below the top cover of the container.
  • a body tube whose major part residing inside the container is a cylindrical tube of generally uniform exterior profile; furthermore its interior surfaces are preferably uniformly cylindrical (except for any inlet valve supports as mentioned above) although the pump chamber interior at the upper part may differ in diameter from the feed tube interior at the lower part.
  • the central opening of the follower plate through which the feed tube passes has a downwardly convergent guide region at its top part. This is to facilitate insertion of the body tube down through the follower plate from above, since it is convenient to assemble the body tube and other pump components before insertion into the follower plate and container. This is particularly relevant with high-efficiency follower plates having resilient sealing lips engaging the container and body tube walls. These need to incline towards the container/body tube surfaces for effective sealing. Insertion of the body tube from above is then problematic. In our new proposal, both functions are achieved by the follower plate's central opening having a sealing lip having a downwardly-convergent portion immediately around the opening, linked to an upwardly extending portion on the main web of the follower plate.
  • the dispenser pump itself desirably has a piston with an outwardly-directed seal engaging against the interior surface of the upper part of the body tube component.
  • the outlet conduit of the pump typically extends up within the plunger, preferably via a unidirectional discharge valve, to an outlet which may move with the plunger and is typically a spout or nozzle integral with or fitted on the plunger component.
  • a return spring for the plunger may be provided in the pump chamber, e.g. acting between the plunger and interior projection on the body tube component as mentioned above, or outside the pump chamber e.g. acting between the plunger component and an upper pump body part such as a securing component which holds the body tube to a container cover cap.
  • a discharge valve can be provided within the discharge conduit of the plunger component, e.g. a trapped ball valve as seen in our earlier application.
  • a novel proposal herein, useful for high-efficiency dispensing of high-viscosity product is to use a flap valve of resilient material in the plunger's discharge conduit.
  • a preferred construction has a flap of resilient valve material trapped in the discharge conduit by an interfitting rigid insert which holds the flexible flap element in place and provides a sealing surface for it. The rigid insert defines discharge openings underlying the web of the flap and therefore covered in the flap's rest condition.
  • the flap provides an opening normally blocked by a solid part of the insert so that passage of material through the valve is only possible when pressure forces the resilient flap away from the insert.
  • Such a construction can advantageously be fitted into a socket formation at the lower end of the plunger e.g. inside the piston element thereof.
  • the pump assembly without the container, with or without a container cover, is an independent aspect of the invention which may or may not include the follower plate too.
  • a container 1 for material to be dispensed (not shown) has a cylindrical side wall 12 and a generally flat base 11.
  • the top opening of the container is closed by a top cover 2 having a downward peripheral skirt 23 with internal circumferential ribs 24 making a secure and air-tight snap engagement over corresponding outwardly directed ribs 14 around the top of the container wall.
  • the top cover 2 has a flat horizontal main web 21 with a central circular opening 22 through which a pump arrangement 10 is mounted as described below. Note also a tamper-evident strip 25 secured around the bottom edge of the cover's skirt 23 by a thin join, and which is caught under a bead on the container wall 12 so that the strip 25 must be pulled off for the cover 2 to be removed.
  • a stiff cylindrical body tube 3 extends vertically from the bottom of the container, where it rests on the base 11, up to the central opening 22 of the cover 2.
  • An integral tubular threaded extension 33 of the body tube 3 projects up through this opening 22 and is held in place there by engagement with the threaded downward skirt 61 of a fixing collar and plunger guide component 6.
  • An integral annular flange 34 projects out radially from the body tube 3 immediately below the threaded top extension 33 and the cover cap web 21 is trapped between this and the securing component's downward skirt 61 for a secure location.
  • the foot 37 of the body tube 3 rests against the centre of the container base 11, as mentioned above, and has sideways openings 38 so that material from the container can enter the tube 3 at the foot.
  • the container base 11 is essentially plain.
  • the Fig. 2 embodiment shows an improvement in which the foot 37 of the tube interlocks with an upstanding cruciform spike 13 formed integrally with the container base, and which prevents any slight sideways movements of the tube foot.
  • the outer surface 36 of the body tube 3 is a uniform smooth cylinder from the top to the bottom of the container, and serves as an inner guide for a follower plate 5.
  • the follower plate 5 is generally a flat annular plate with a central opening 52 through which the body tube 3 passes, and extends out radially from the central opening to span the gap between the tube 3 and the container side wall 12. Its function, as known from earlier disclosures, is to lie on top of the mass of product in the container. As the product is dispensed and its level in the container falls, the follower plate 5 moves down the container guided by the tube 3 to assure full clearance of the container space and also to prevent voids from forming in the material during dispensing.
  • the body tube 3 provides plural functions in the container. It guides the follower plate 5 as mentioned. Its lower part 32 acts as a feed tube by which material entering through its foot is fed to the pump mounted at the top of the container. Its upper portion 31 acts as a wall of the pump chamber 66 in which the pump piston 73 operates. The upper and lower portions 31,32 of the tube are demarcated by an internal valve support arrangement for providing an inlet valve through which material from the feed tube portion 32 can enter the pump chamber 66 defined within the upper portion 31 of the tube.
  • valve arrangement 4 is provided by an integrally-moulded projection of the body tube 3, including a radially inward flat annular flange 41 acting as abutment for a pump spring 65, and leading to a central downward convergent portion 42 acting as a sealing seat for a valve ball 43.
  • the valve ball 43 can move up to let material into the pump chamber 66, but its escape is prevented by a central projection of the pump spring 65.
  • inlet valve 4 is supported on a flat annular inward flange 44 formed integrally on the body tube 3 to define a central circular opening.
  • a discrete flap valve insert 45 has an outer mounting annulus 46 which rests on the body tube flange 44, and a central flexibly-linked flap 47 which lies over the central opening to act as a valve in a subevident fashion.
  • the pump construction at the top of the container includes the fixing collar component 6 already referred to, which also has a central sleeve 63 guiding the movement of a pump plunger shaft 71.
  • the bottom end of this plunger shaft 71 is formed with a piston 73 which seals outwardly against the inner surface of the upper portion 31 of the body tube 3.
  • this seal is a double-acting flared seal 74 formed integrally with the shaft and piston component.
  • the piston seal uses an O-ring 75 seated in a groove around the piston.
  • a central discharge channel 72 extends up inside the plunger shaft 71.
  • a plunger head 8 is fitted to the top of the plunger shaft 71 by a snap fitting 81 and includes a laterally-directed discharge nozzle or spout 82 with an internal nozzle channel 87 communicating with the discharge channel 72 of the plunger shaft 71.
  • a discharge valve 9 is installed in the discharge channel and acts to prevent air or dispensed material from flowing back from the nozzle towards the pump chamber 66.
  • a pump spring 65 acts in a conventional manner to urge the plunger to the raised position.
  • Fig. 1's embodiment has the pump spring 65 in the pump chamber 66, acting between the inward flange 41 of the body tube adjacent the inlet valve at the lower end and against an internal shoulder of the plunger shaft 71 at the upper end.
  • Fig. 2's embodiment has the return spring 65 outside the pump chamber 66. This may be desirable e.g. where metal components must not contact the material to be dispensed.
  • the fixing collar 6 has an upward tubular extension 64 fitting into a complementary downward tubular extension 86 of the plunger head 8. These nested tubular components enshroud the spring in an annular space around the plunger shaft 71, with its lower end acting against the fixing collar component 6 and its upper end against the plunger head 8.
  • the construction of the body tube 3 brings a substantial simplification of construction and saving in material.
  • Previous constructions required the step of fitting the feed tube to the body, and extra material was used because the feed tube had to fit right up around the pump body in order to guide the follower plate smoothly.
  • the present arrangement enables the pump inlet valve to be supported by integral formations of the body tube interior.
  • the top extension 33 of the body tube another integral portion, serves for securing the tube in place relative to the top cover 2, and in Authorised Representative manner analogous to that known for securing a pump body in place so there are no added complications.
  • Fig. 2 is particularly concerned to provide high efficiency sealing and valving suitable for use with products of high thickness or high viscosity. Details of these features and the corresponding features of Fig. 1 are now discussed.
  • the discharge valve 9 Fig. 1's embodiment uses a known construction with a ball valve.
  • the top opening of the plunger shaft 71 has a downwardly-convergent valve seat 91 and the ball 92 of the valve is trapped in this when the plunger head 8 is fitted.
  • Fig. 2's embodiment uses a flexible rubber disc 96 with a central hole, trapped in the bottom opening of the discharge channel 72 by a stiff insert component 93 which snaps into the piston of the plunger shaft 71.
  • the insert 93 has a central upwardly-directed land 95 and off-centre openings 94, so that in the rest condition the flexible rubber disc seals against the land and shuts the openings 94.
  • the Fig. 1 embodiment uses a simple stiff follower plate which makes a snug but not sealing fit around the body tube 3, and whose outer edge 53 reaches substantially to the container wall 12 but does not seal flexibly against it.
  • the Fig. 2 embodiment has a follower plate making a close seal against the body tube 3 and container wall 12, by means of axially directed relatively flexible sealing lips 59, 58 at its outer and inner peripheries. This in itself is known - see our EP-A-765690. However with the one-piece body tube used in the present systems it is best to assemble the follower plate 5 onto the tube 3 after the tube 3 has been fitted to the cover cap 2 and other pump components.
  • the tube 3 is inserted into the follower plate from above after having laid the follower plate on the surface of the product, to avoid trapping air between plate and product. So, we use a downward convergence of the follower plate construction around its central opening 52. In the Fig. 1 embodiment this is a tapered interior zone 55 at the top of its central upstanding stiff collar 54. In the Fig. 2 version, the flexible sealing lip 58 to seal against the body tube 3 is made downwardly convergent, but extends down from the top of a reinforced upward wall portion 57 so that it does not project below the web level of the follower plate and prevent eventual clearance of the container.
  • FIG. 1 shows a closure 83 including both an intruding plug and a surrounding cap for the nozzle 82.
  • a refinement is involved in linking this plug/cap 83 by an integral flexible link 84 to a removable security collar 85 which fits around the plunger shaft 71 to prevent inadvertent or undesired depression of the plunger head 8.
EP98306300A 1997-08-26 1998-08-06 Abgabesysteme Expired - Lifetime EP0899206B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9718007 1997-08-26
GBGB9718007.9A GB9718007D0 (en) 1997-08-26 1997-08-26 Dispensing systems

Publications (2)

Publication Number Publication Date
EP0899206A1 true EP0899206A1 (de) 1999-03-03
EP0899206B1 EP0899206B1 (de) 2000-03-08

Family

ID=10818010

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98306300A Expired - Lifetime EP0899206B1 (de) 1997-08-26 1998-08-06 Abgabesysteme

Country Status (4)

Country Link
EP (1) EP0899206B1 (de)
DE (1) DE69800089T2 (de)
ES (1) ES2146123T3 (de)
GB (1) GB9718007D0 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2367865A (en) * 2000-03-21 2002-04-17 English Glass Company Ltd Dispensing system with follower plate
DE10345667A1 (de) * 2003-10-01 2005-04-21 Debler Harry Pumpsprühvorrichtung für verbessertes Sprühverhalten
DE102006044029B3 (de) * 2006-09-14 2008-01-31 Hsih Tung Tolling Co., Ltd. Dosierpumpe
DE102008015745A1 (de) 2008-03-20 2009-09-24 Möller, Mike Universaldosierpumpe mit Aromaschutz
ITRM20110071A1 (it) * 2011-02-16 2012-08-17 Emsar Spa Tasto erogatore per dispensatori applicabili a flaconi o simili.
WO2021127117A1 (en) * 2019-12-18 2021-06-24 Glaxosmithkline Consumer Healthcare Holdings (Us) Llc Tamper-proof and controlled dosing container

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU90512B1 (en) * 2000-02-02 2001-08-03 Delphi Tech Inc Device for mounting a sensor in a compartment
US20110064587A1 (en) 2009-09-17 2011-03-17 Nordson Corporation Low waste pump follower
DE202019103061U1 (de) * 2019-05-29 2020-09-01 Louvrette Gmbh Design X Packaging Vorrichtung zur Aufbewahrung und Abgabe einer flüssigen oder pastösen Masse

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB959835A (en) * 1961-10-31 1964-06-03 County Lab Ltd Improvements relating to dispensers for viscous liquids
FR2546483A1 (fr) * 1983-05-24 1984-11-30 Aerosol Inventions Dev Distributeur-doseur manuel de substance fluide
EP0193054A1 (de) * 1985-02-21 1986-09-03 Ing. Erich Pfeiffer GmbH & Co. KG Ausgabeeinrichtung für fliessfähige Medien
US4691849A (en) * 1985-12-03 1987-09-08 Atsushi Tada Manually operated trigger type dispenser
EP0499538A1 (de) * 1991-02-13 1992-08-19 S O F A B Verpackung für pastöse Medien
WO1994025175A1 (fr) * 1993-04-29 1994-11-10 Etablissements Valois S.A. Dispositif portatif pour la distribution d'une substance fluide
EP0765690A1 (de) 1995-09-22 1997-04-02 The English Glass Company Limited Abgabevorrichtung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB959835A (en) * 1961-10-31 1964-06-03 County Lab Ltd Improvements relating to dispensers for viscous liquids
FR2546483A1 (fr) * 1983-05-24 1984-11-30 Aerosol Inventions Dev Distributeur-doseur manuel de substance fluide
EP0193054A1 (de) * 1985-02-21 1986-09-03 Ing. Erich Pfeiffer GmbH & Co. KG Ausgabeeinrichtung für fliessfähige Medien
US4691849A (en) * 1985-12-03 1987-09-08 Atsushi Tada Manually operated trigger type dispenser
EP0499538A1 (de) * 1991-02-13 1992-08-19 S O F A B Verpackung für pastöse Medien
WO1994025175A1 (fr) * 1993-04-29 1994-11-10 Etablissements Valois S.A. Dispositif portatif pour la distribution d'une substance fluide
EP0765690A1 (de) 1995-09-22 1997-04-02 The English Glass Company Limited Abgabevorrichtung

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2367865A (en) * 2000-03-21 2002-04-17 English Glass Company Ltd Dispensing system with follower plate
DE10345667A1 (de) * 2003-10-01 2005-04-21 Debler Harry Pumpsprühvorrichtung für verbessertes Sprühverhalten
DE102006044029B3 (de) * 2006-09-14 2008-01-31 Hsih Tung Tolling Co., Ltd. Dosierpumpe
DE102008015745A1 (de) 2008-03-20 2009-09-24 Möller, Mike Universaldosierpumpe mit Aromaschutz
ITRM20110071A1 (it) * 2011-02-16 2012-08-17 Emsar Spa Tasto erogatore per dispensatori applicabili a flaconi o simili.
CN102642670A (zh) * 2011-02-16 2012-08-22 埃姆萨股份公司 用于可应用于瓶等的分配器的分配器按钮
EP2489439A1 (de) * 2011-02-16 2012-08-22 Emsar S.p.A. Spenderknopf für eine Spendervorrichtung
CN102642670B (zh) * 2011-02-16 2015-12-09 埃姆萨股份公司 用于可应用于瓶等的分配器的分配器按钮
WO2021127117A1 (en) * 2019-12-18 2021-06-24 Glaxosmithkline Consumer Healthcare Holdings (Us) Llc Tamper-proof and controlled dosing container
CN115052685A (zh) * 2019-12-18 2022-09-13 葛兰素史克消费者健康控股(美国)有限责任公司 防擅动且受控的定量容器

Also Published As

Publication number Publication date
GB9718007D0 (en) 1997-10-29
ES2146123T3 (es) 2000-07-16
EP0899206B1 (de) 2000-03-08
DE69800089T2 (de) 2000-09-14
DE69800089D1 (de) 2000-04-13

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