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EP1097002B1 - Systeme de distribution et son procede de remplissage - Google Patents

Systeme de distribution et son procede de remplissage Download PDF

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Publication number
EP1097002B1
EP1097002B1 EP99933027A EP99933027A EP1097002B1 EP 1097002 B1 EP1097002 B1 EP 1097002B1 EP 99933027 A EP99933027 A EP 99933027A EP 99933027 A EP99933027 A EP 99933027A EP 1097002 B1 EP1097002 B1 EP 1097002B1
Authority
EP
European Patent Office
Prior art keywords
container
follower plate
feed tube
dispensing system
spacer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99933027A
Other languages
German (de)
English (en)
Other versions
EP1097002A1 (fr
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.)
Rieke Packaging Systems Ltd
Original Assignee
Rieke Packaging Systems 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 Rieke Packaging Systems Ltd filed Critical Rieke Packaging Systems Ltd
Publication of EP1097002A1 publication Critical patent/EP1097002A1/fr
Application granted granted Critical
Publication of EP1097002B1 publication Critical patent/EP1097002B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01Single-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
    • B05B11/02Membranes or pistons acting on the contents inside the container, e.g. follower pistons
    • B05B11/028Pistons separating the content remaining in the container from the atmospheric air to compensate underpressure inside the container
    • B05B11/029Pistons separating the content remaining in the container from the atmospheric air to compensate underpressure inside the container located on top of the remaining content
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01Single-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
    • B05B11/10Pump 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
    • B05B11/1001Piston pumps
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01Single-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
    • B05B11/10Pump 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
    • B05B11/1042Components or details
    • B05B11/1073Springs
    • B05B11/1074Springs located outside pump chambers

Definitions

  • This invention has to do with dispensing systems and methods for filling them with flowable material to be dispensed according to the features of the preamble of claim 1.
  • a dispenser comprising these features is known from US 4 817 829 .
  • a well known type of dispensing system useful with thick and viscous products such as pharmaceutical and cosmetic creams and lotions, has a plunger action dispenser pump mounted on or in the cover of a cylindrical container.
  • a stiff feed tube for the pump extends down to the bottom of the container and a follower plate fits axially slidably around the feed tube.
  • the follower plate lies on top of the product mass to follow it down the container as dispensing proceeds. This helps to ensure complete clearance of the contents. In the absence of a follower plate the formation of cavities in the product near the foot of the feed tube can make it impossible to clear the container completely. See our EP-A-765690 and our earlier-filed EP 899206 for further information about the operation of such systems and refinements thereof, for example methods for securing the feed tube against lateral displacement, and disposition of operative pump components within the feed tube itself.
  • the flowable product can be forced up inside the feed tube. This can reduce or eliminate the difficulties with priming referred to above, even when the outlet valve is a strict one.
  • the height limiting abutment can keep the follower plate in sealing engagement with the inner sealing surface proper rather than encroaching on the securing construction at the rim. We find that this can help reduce incidences in which the follower plate fails to act. In particular, heat-expansive products which are filled in a heated state will subsequently contract so that the container must initially be filled very full to action a desired fill level/weight when cold. The initial high fill level tends to hold the follower plate too high, particularly by the feed tube.
  • the more forcible contact of the follower plate with the contained material improves their mutual adhesion, which also assists the follower plate action.
  • product shrinkage which occurs on cooling is apt to cause separation of the product surface from the follower plate and the enhanced contact helps to prevent that.
  • the predetermined level for the follower plate is generally one at which it makes a seal against the container wall. Usually this is spaced below the container rim, and especially where the container rim has a radially recessed band adjacent the rim for cover securement purposes.
  • the follower plate takes the form of a generally level continuous web with an upwardly projecting sealing lip around its outer edge, making sealing contact at or near its upper extremity.
  • the centre of the follower plate has a hole for the feed tube, and a sealing construction at the inner periphery desirably has a downwardly-directed (downwardly convergent) sealing lip to facilitate feed tube insertion.
  • the downwardly-directed inner sealing lip is generally provided on a central upwardly-projecting construction so that the underside of the follower plate can descend unobstructed right to the floor of the container.
  • an upward lip may be used e.g. if the feed tube can be inserted up through the follower plate.
  • the structure and disposition of a height limiting abutment can be chosen from a variety of options.
  • One approach would be to provide one or more internal projections of the container side wall. This is not part of the present invention because of the need for a special container and the requirement that while the projection(s) will adequately prevent rise of the follower plate, the follower plate must nevertheless be conveniently insertable down past the projection(s) during assembly.
  • engagement by the height limiting abutment acts against a component other than the container, i.e. one or more of the feed tube, other pump components (where present at the underside of the cover) and the cover itself.
  • the height limiting abutment engagement for the follower plate is distributed around the feed tube. This levels the follower plate as the abutment counters the pressure of material beneath the plate.
  • the arrangement can effectively function as a spacer between the general level of the follower plate and the general level of the cover. To this end it may comprise one or both of an upward projection on the follower plate and a downward projection on the cover. Or it may be on one of the pump components mounted thereto.
  • a preferred form of abutment is annular, and most preferably immediately adjacent the feed tube exterior either as an integral projection thereof or as a discrete spacer element which can fit around the feed tube.
  • a discrete element because of the design flexibility enabling different axial sizes of abutment to be chosen.
  • an air vent is provided through the cover adjacent the top of the feed tube/pump body, e.g. as one or more small openings into or past the pump body.
  • the height limiting construction of the present proposals preferably engages the follower plate below the air vent arrangement, leaving clearance for venting above the engagement.
  • the abutment e.g. annular spacer, may itself include one or more vent openings for this purpose.
  • this may be one or more vent openings from the inside to the outside of the annulus, and/or one or more vent openings from the top to the bottom of the annulus.
  • Such openings are conveniently provided as recessed portions of the top/bottom/inner surfaces of the spacer, as appropriate.
  • a filled dispensing system of the kind described in which the height limiting abutment holds the follower plate down at a predetermined level as described above, is one aspect of the invention.
  • a further aspect is a method of filling a dispensing system of the kind described, including filling the material into the container (optionally with heating to reduce its viscosity), positioning the follower plate and inserting the feed tube.
  • the order of operations first explained need not necessarily be followed. That is, the steps of positioning the follower plate on the material surface and of pushing the feed tube down into the material maybe interchanged or may overlap.
  • the height limiting abutment can serve a useful effect even when the follower plate is introduced into the container as part of an assembly with the feed tube.
  • a container 1 for material (M) to be dispensed has a cylindrical side wall 12 and a generally flat base 11.
  • the top opening of the container is closed by a top cover cap 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 rim of the container wall.
  • the cover cap 2 has a flat horizontal main web 21 with a central circular opening 22 through which a pump construction is mounted as described below.
  • the manner in which the cap 2 fits onto the container 1 is not critical and may be varied as desired, e.g. by using a screw thread.
  • the top rim of the container has a reduced-thickness zone 15 to facilitate the deformation required for snap fitting; here the container's inner diameter is radially enlarged relative to the otherwise uniform cylindrical inner surface 16.
  • a stiff cylindrical feed tube 3 extends vertically from the top to the bottom of the container. At the bottom it rests against the container base 11, with lateral openings 38 for material to enter.
  • the present embodiment locates the foot of the feed tube over a cruciform spike 13, as discussed in our EP-A-765690 .
  • an integral tubular threaded extension 33 of the feed tube 3 projects up through the cover opening 22 and is held in place by a threaded-on fixing collar and plunger guide component 6.
  • the feed tube component has an integral annular flange 34 projecting out radially immediately below the top extension 33, and the web 21 of the cover cap is trapped between this and the downward skirt 61 of the guide component 6 to hold the feed tube 3 and cover 2 together as a single assembly.
  • the outer surface 36 of the feed 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.
  • This is a generally flat annular plate having a continuous horizontal web 51 with a central opening 52 through which the feed tube passes. Its function, as known from earlier disclosures, is to lie on top of the mass of product in the container. As the product level in the container falls the follower plate 5 moves down the container, guided by the feed tube 3, to assure full clearance of material from the container space.
  • the central opening 52 has an upwardly-projecting stiff tubular seal construction 54 supporting a downwardly convergent inner flexible sealing lip 55 which bears against the feed tube surface 36.
  • the periphery of the plate has a flexible upwardly-divergent sealing lip 56 to bear against the container's inner surface 16.
  • the cover/feed tube assembly also includes a pump 8.
  • a pump 8 This may take any of a variety of relatively conventional forms, e.g. as shown in our EP-A-765690 where the pump body (cylinder) fits down inside the top of the feed tube.
  • the present embodiment is a more sophisticated construction in which the feed tube 3 itself acts as the pump cylinder.
  • the active component of the pump is a manually reciprocable plunger 7 having a bottom piston 73 working sealingly in the upper region of the feed tube 3 and a top plunger head 81 with a laterally-directed discharge spout 82 communicating with the pump chamber via a central discharge channel 72 within the plunger itself.
  • the pump chamber has an inlet valve to assure unidirectional flow up the feed tube 3.
  • the inlet valve 4 is a flap insert 45 supported on an inward flange 44 formed integrally in the interior of the feed tube 3, but other constructions are possible: a ball valve may be used, or the valve construction may be in a discrete pump body component inserted in the feed tube.
  • a discharge valve 9 is provided in the discharge channel of the plunger 8 so that product is drawn into the pump chamber as the plunger 8 rises after a pumping stroke.
  • the discharge valve 9 may take a variety of forms as is well known, for example a ball or flap valve.
  • a flap valve with a flap of resilient material e.g. nitrile rubber which in its rest position is urged with a sealing force against the stiff counter surface.
  • the rubber flap is provided as a disc with a central hole, trapped in the enlarged bottom opening of the discharge channel 72 by an insert component which snaps into place.
  • Such a valve provides high-efficiency sealing. It also requires an appreciable pressure to open it; greater than that required for the inlet valve 4.
  • Dispensing systems of this kind conventionally require a vent arrangement so that air can enter the container to compensate for the volume of product dispensed.
  • the venting system must be proof against leaks, however.
  • one or more small vent openings 35 are provided through the wall of the feed tube 3 immediately below its locating flange 34. Air can leak into the container through the vent opening(s) 35 from above via a tortuous path through the pump construction.
  • a particular feature of the construction is a height limiting abutment in the form of a discrete, annular spacer insert 100 best seen in Fig 2.
  • the spacer insert 100 which (like the rest of the pump) may conveniently be moulded in plastics material fits closely (but slidably) around the top of the feed tube 3. It presents a generally flat radial lower surface 101, radially aligned with the upwardly-projecting inner seal construction 54 of the follower plate 5 so that the top of that seal construction makes an engagement around the spacer 100 defining an uppermost limit position for the follower plate 5.
  • the upper surface 102 of the insert 100 bears upwardly against the bottom of the locking flange 34 of the feed tube, i.e. effectively up against the bottom of the cover.
  • One or more radially-extending vent channels 103 penetrate the spacer 100; in this embodiment they are provided as simple recesses in its upper surface 102.
  • the inner surface 105 of the insert 100 which otherwise fits closely against the feed tube, has at its upper portion an annular recess 104 providing a manifold to assure communication of the (circumferentially localised) vent openings 35 in the feed tube 3 with the (circumferentially localised) venting channels 103 in the insert 100.
  • the discrete spacer insert 100 is pushed onto the feed tube 3 before the cover cap, pump and feed tube components are put on the container.
  • the container having been filled and the follower plate 5 positioned on the material surface in the container (the follower plate may alternatively be put first onto the feed tube), the feed tube is then pushed down into the container until the cover cap locks onto the container rim.
  • displacement by the feed tube requires that the material surface will rise in the container and/or that the material will rise up inside the feed tube.
  • the latter tendency is strongly inhibited by the discharge valve 9, which is reluctant to open. The tendency therefore would be for the material surface to rise, lifting the follower plate 5 to the condition shown at the left-hand side of Fig 2.
  • the presence of the spacer insert 100 as now proposed forces the follower plate in the assembled condition to adopt the predetermined lower level as seen on the right hand side of Figure 2, with its outer seal properly in contact with the container's inner sealing surface. This enhances contact of the follower plate with the material surface too, so that the follower plate reliably follows the material surface even when there is shrinkage.
  • the height (axial size) of the insert can easily be varied in relation to the volume of material filled so that the forced movement of the follower plate 5 to the predetermined level as shown will force an appropriate quantity of material up the feed tube 3 to prime the pump.
  • Figs 3 and 4 show details of variants and refinements of the height controlling spacer 100.
  • the version shown in Fig 3 corresponds in essence to that shown in Fig 2, with a pair of radially-extending recesses 103 enabling venting from the inside to the outside of the ring passed the bearing surface 102, and an internal manifold recess 104 to assure vent communication.
  • the refinement here is that the top and bottom surfaces of the annular spacer are formed identically, as seen to the left of Fig 3, so that the orientation of the spacer does not need to be controlled during assembly.
  • the top and bottom bearing surfaces of the spacer are flat and entire.
  • the possibility of venting is provided instead by a series of inwardly-directed teeth 109 on the spacer which fit against the feed tube surface and leave a corresponding circumferential series of top-to-bottom clearances 106 between them.

Landscapes

  • Closures For Containers (AREA)
  • Basic Packing Technique (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Paper (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Claims (12)

  1. Système de distribution comprenant:
    un récipient (1) pour contenir un matériau liquide à distribuer, le récipient (1) ayant une base (11) et une paroi latérale (12) qui a une surface d'étanchéité interne (16) et un bord supérieur autour d'une ouverture supérieure du récipient ;
    un couvercle distinct (2) pouvant être fixé sur l'ouverture supérieure pour une condition assemblée du système ;
    une pompe (8) pour distribuer des matériaux du récipient via une ouverture passant par le couvercle (2), et ayant un tube d'alimentation (3) s'étendant vers le bas dans le récipient;
    une plaque suiveuse (5) montée de manière axialement coulissante autour du tube d'alimentation pour réaliser une mise en prise étanche avec la surface d'étanchéité interne (16) du récipient, et suivre la surface du matériau en bas du récipient lorsque la distribution a lieu, et
    une butée de limite de hauteur (100) entre le couvercle (2) et la plaque suiveuse (5), agencée pour agir vers le bas sur la plaque suiveuse dans la condition assemblée avec le récipient (1) rempli initialement avec du matériau à distribuer, pour maintenir la plaque suiveuse (5) vers le bas contre le matériau déversé au-dessous d'un niveau prédéterminé adjacent à la partie supérieure du récipient et réaliser la mise en prise étanche avec sa surface d'étanchéité interne, caractérisé par la butée de limite de hauteur (100) qui se présente sous la forme d'un insert de dispositif d'espacement distinct (100).
  2. Système de distribution selon la revendication 1, dans lequel la mise en prise de l'insert de dispositif d'espacement (100) avec la plaque suiveuse est répartie autour du tube d'alimentation pour mettre la plaque suiveuse (5) au niveau.
  3. Système de distribution selon la revendication 2, dans lequel l'insert de dispositif d'espacement (100) est annulaire.
  4. Système de distribution selon l'une quelconque des revendications précédentes, dans lequel l'insert de dispositif d'espacement (100) est localisé radialement de manière adjacente au tube d'alimentation.
  5. Système de distribution selon l'une quelconque des revendications précédentes, dans lequel l'insert de dispositif d'espacement (100) met en prise la plaque suiveuse (5) au niveau de sa construction de joint d'étanchéité (54) central faisant saillie vers le haut.
  6. Système de distribution selon l'une quelconque des revendications précédentes, dans lequel audit niveau prédéterminé, la mise en prise d'étanchéité de la plaque suiveuse (5) avec la surface d'étanchéité interne (16) du récipient est espacée au-dessous du bord supérieur de la paroi latérale du récipient.
  7. Système de distribution selon la revendication 6, dans lequel la surface interne de la paroi latérale du récipient a une bande enfoncée vers l'extérieur (15) adjacente au bord supérieur, au-dessus de la surface d'étanchéité (16).
  8. Système de distribution selon l'une quelconque des revendications précédentes, dans lequel le dispositif d'espacement distinct (100) a une ou plusieurs ouvertures d'évacuation (103) pour la communication entre l'intérieur du récipient et une évacuation d'air passant par le couvercle adjacent à la partie supérieure du tube d'alimentation.
  9. Système de distribution selon la revendication 8, dans lequel les une ou plusieurs ouvertures d'évacuation (103) est/sont prévue(s) par les parties enfoncées de la surface du dispositif d'espacement.
  10. Procédé de remplissage d'un système de distribution selon l'une quelconque des revendications 1 à 9, comprenant les étapes consistant à:
    a) déverser le matériau liquide dans le récipient (1);
    b) positionner la plaque suiveuse (5) sur la surface du matériau dans le récipient rempli, et
    c) pousser le tube d'alimentation (3), monté avec le dispositif d'espacement distinct et positionné au niveau de l'ouverture centrale (52) de la plaque suiveuse (5), vers le bas dans le matériau vers la base du récipient, et
    d) fixer le couvercle (2) sur l'ouverture supérieure du récipient,
    moyennant quoi à un certain stade pendant l'étape (c), le dispositif d'espacement distinct (100) se met en prise et agit vers le bas sur la plaque suiveuse pour l'empêcher de monter au-dessus d'un niveau prédéterminé dans le récipient lorsque le tube d'alimentation (3) est poussé dans le matériau liquide, forçant ainsi le matériau liquide à monter à l'intérieur du tube d'alimentation vers la pompe (8).
  11. Procédé selon la revendication 10, dans lequel l'étape (b) a lieu avant que l'étape (c) ne commence.
  12. Procédé selon la revendication 10 ou 11, dans lequel le matériau liquide est rempli dans le récipient (1) dans un état chauffé pour réduire sa viscosité et se refroidit ensuite jusqu'à un état de viscosité plus importante.
EP99933027A 1998-07-13 1999-07-13 Systeme de distribution et son procede de remplissage Expired - Lifetime EP1097002B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9815195 1998-07-13
GB9815195A GB2335241B (en) 1998-07-13 1998-07-13 Dispensing systems
PCT/GB1999/002248 WO2000002666A1 (fr) 1998-07-13 1999-07-13 Systeme de distribution et son procede de remplissage

Publications (2)

Publication Number Publication Date
EP1097002A1 EP1097002A1 (fr) 2001-05-09
EP1097002B1 true EP1097002B1 (fr) 2007-06-20

Family

ID=10835438

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99933027A Expired - Lifetime EP1097002B1 (fr) 1998-07-13 1999-07-13 Systeme de distribution et son procede de remplissage

Country Status (7)

Country Link
EP (1) EP1097002B1 (fr)
AT (1) ATE365079T1 (fr)
DE (1) DE69936345T2 (fr)
DK (1) DK1097002T3 (fr)
GB (1) GB2335241B (fr)
PT (1) PT1097002E (fr)
WO (1) WO2000002666A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6362832B1 (en) 1999-09-01 2002-03-26 Packard Bioscience Company Method and system for overlaying at least three microarray images to obtain a multicolor composite image
GB0006856D0 (en) * 2000-03-21 2000-05-10 English Glass The Company Limi Dispensing systems

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB891908A (en) * 1959-07-28 1962-03-21 Selwyn Byers Weston Improvements in and relating to devices for dispensing fluids from containers
GB959835A (en) * 1961-10-31 1964-06-03 County Lab Ltd Improvements relating to dispensers for viscous liquids
GB1113680A (en) * 1966-04-28 1968-05-15 John Alan Brightwell Dispensers for creams, liquids or the like
DE3521580A1 (de) * 1985-02-21 1986-08-21 Bayer Ag, 5090 Leverkusen Ausgabeeinrichtung fuer fliessfaehige medien
US4750532A (en) * 1986-12-11 1988-06-14 Gisela Grothoff Device for extracting liquids contained therein and arrangement for filling the device
GB9519346D0 (en) * 1995-09-22 1995-11-22 English Glass Company The Limi Dispensing systems

Also Published As

Publication number Publication date
EP1097002A1 (fr) 2001-05-09
DE69936345D1 (de) 2007-08-02
ATE365079T1 (de) 2007-07-15
GB2335241A (en) 1999-09-15
GB2335241B (en) 2000-03-01
WO2000002666A1 (fr) 2000-01-20
GB9815195D0 (en) 1998-09-09
DK1097002T3 (da) 2007-09-24
DE69936345T2 (de) 2008-02-21
PT1097002E (pt) 2007-09-17

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