WO2003030699A2 - Distributeur de liquides a tres forte viscosite - Google Patents

Distributeur de liquides a tres forte viscosite Download PDF

Info

Publication number
WO2003030699A2
WO2003030699A2 PCT/DK2001/000659 DK0100659W WO03030699A2 WO 2003030699 A2 WO2003030699 A2 WO 2003030699A2 DK 0100659 W DK0100659 W DK 0100659W WO 03030699 A2 WO03030699 A2 WO 03030699A2
Authority
WO
WIPO (PCT)
Prior art keywords
tube
pump
gripping means
collapsible
dispenser
Prior art date
Application number
PCT/DK2001/000659
Other languages
English (en)
Inventor
Erik Pedersen
Original Assignee
Erik Pedersen
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 Erik Pedersen filed Critical Erik Pedersen
Priority to PCT/DK2001/000659 priority Critical patent/WO2003030699A2/fr
Publication of WO2003030699A2 publication Critical patent/WO2003030699A2/fr

Links

Classifications

    • 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
    • B05B11/0005—Components or details
    • B05B11/0037—Containers
    • B05B11/0038—Inner container disposed in an outer shell or outer casing
    • 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
    • B05B11/1042—Components or details
    • B05B11/1043—Sealing or attachment arrangements between pump and container
    • B05B11/1046—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container
    • B05B11/1047—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container the pump being preassembled as an independent unit before being mounted on the container

Definitions

  • Dispenser for highly viscous fluids.
  • the present invention relates to a dispenser for a highly viscous fluid, in particular toothpaste contained in a collapsible tube, said collapsible tube having a body part, defining a storage cavity for said highly viscous fluid, and a neck part with an external shoulder, where the neck part has a passage through which the fluid may be removed, said dispenser comprising an adaptor, a pump, and tube gripping means .
  • Such dispensers often include a container, in which the collapsible tube is accommodated.
  • the container may then be given the desired aesthetic appearance whilst at the same time preventing people from squeezing the collapsible tube directly, in particular at the middle.
  • this use of a con- tainer necessitates the use of some other means than the direct manual squeezing of the collapsible tube in order to remove the paste from the collapsible tube .
  • dispensers using pumps are known, e.g. of the kinds disclosed in GB-A-2155117, US-A-5474212 , EP-A-362835 and DE-A- 4341270.
  • These dispensers have the common feature that they are adapted for highly flexible bags.
  • the pump is connected to a suction tube, which reaches to the bottom of the bag. The pump thus empties the flexible bags by extracting liquid from the bottom thereof. During this process the flexible bags collapse under the pressure from the outside air.
  • this object is in a dispenser according to the opening paragraph solved by the pump comprising a pump mechanism and a pump tube connected to the pump mechanism, and that the tube gripping means are adapted to grip the neck part of the collapsible tube, and hold and secure the collapsible tube in a substantially vertically suspended position, the gripping means and the pump further being arranged so as to allow the pump tube to extend into the tube through said passage in the neck part in a non-blocking manner.
  • This arrangement allows the air pressure in the storage cavity of the collapsible tube to be equal - ized by the external air, when the inherent elasticity of the collapsible tube tries to force it back to its natural shape. In this manner the collapsible tube regains its natural shape because air is allowed into the tube to compensate for the dispensed fluid, thereby allowing the highly viscous fluid to fall to the lower part of the collapsible tube. Since the pump tube reaches to the bottom of the collapsible tube this allows all of the highly viscous fluid to be gradually removed, as it flows to the bottom of the storage cavity.
  • the pump tube always extracts the highly viscous fluid from the bottom, the risk of the highly viscous fluid drying up is reduced, because only the upper surface thereof is exposed to evaporation.
  • the gripping means are arranged so as to hold the neck part of the tube adjacent to a chamber into which there is free access from the storage cavity through said non-blocked pas- sage.
  • the chamber has at least one air pressure equalising access. Having an equalizing passage allows external air to enter into the chamber, thus subsequently equalizing the pressure, which, due to the extracted highly viscous fluid, is reduced in the otherwise closed system of the cavity and the chamber.
  • the gripping means is provided by an aperture in a wall of said chamber.
  • the gripping means are provided by a number of ribs extending in radial direction with regard to the pump tube.
  • said air pressure equalizing access is arranged in conjunction with the gripping means . This is advantageous, because the air drawn into the chamber to equalize the pressure is replaced with air not coming directly from the external air. This lack of direct access of external air further prevents the highly viscous fluid from drying out.
  • the preferred embodiment of the air pressure equalizing access is providing it by the manufacturing tolerances between the aperture and the neck of the collapsible tube.
  • the volume of the chamber should be at least one tenth of the total volume of the storage cavity of the tube .
  • a first opening is provided at said first end and that the adaptor is adapted be detachably mounted at said first end so as to cover said opening.
  • the dispenser may be a self-contained one-part unit.
  • fig. 1. illustrates a partially sectional side view of one embodiment of the present invention
  • fig. 2 illustrates a partially sectional side view of a second embodiment of the pump and chamber arrangement
  • fig. 3 illustrates a partially sectional side view of a third embodiment of the present invention, with another example of the gripping means and the chamber
  • fig. 4 illustrates a partially sectional side view of a fourth embodiment of the present invention with still different gripping means and chamber
  • fig. 5 illustrates a partially sectional side view of a fifth embodiment of the invention in which the adaptor is integral with the casing.
  • FIG. 1 a partially sectional side view of the dispenser in accordance with the present invention.
  • the dispenser comprises an optional casing 1.
  • the casing has a first opening la at one end.
  • the size of the casing 1 is selected to accommodate a desired standard collapsible tube 100.
  • An adaptor 2 covers the opening la.
  • the adaptor 2 is detachably mounted over said one opening la of the casing 1.
  • the collapsible tube 100 containing highly viscous fluid, such as toothpaste, grease, foodstuff, or the like.
  • the collapsible tube is of a standard type, and includes a body part and a neck part 200 including a passage 200a and a shoulder 201.
  • the dispenser further comprises a pump with a pump mechanism 3, a pump tube 4 and a dispensing nozzle 51 integrated in a plunger 5.
  • the actual internal construction of the pump mechanism 3 is not considered of relevance for this invention. Rather, the pump mechanism 3 is of a conventional type known to those skilled in the art and only a matter of appropriate selection. In order to simplify the illustration, the pump mechanism 3 and pump tube 4 are only shown in plan view.
  • the pump tube 4 may be an integral part of the pump mechanism 4 or it may be a separate attached element. The latter is preferred.
  • the adaptor 2 has a size allowing the pump mechanism 3 to be located therein.
  • the pump tube 4 has a length allowing it to reach the bottom of the collapsible tube 1, when the collapsible tube 100 is placed in a gripping means 6 in a manner to be described below.
  • the pump tube 4 further has external cross sectional dimensions allowing it to fit inside of the passage 200a. In par- ticular, the external dimensions of the pump tube are chosen so as to prevent the pump tube 4 from blocking the passage 200a.
  • the dispenser further comprises a gripping means 6 for the collapsible tube 100.
  • the gripping means is designed to hold the collapsible tube 100 in a substantially vertically sus- pended position. In this respect it should be noticed that no other means for supporting the collapsible tube exists, e.g.
  • the dispenser may be used for a variety of different sizes of collapsible tubes, just by selecting a pump tube of an appropriate length. This is a simple operation, which may be accomplished by the user, if pump tubes of different lengths are supplied with the dispenser.
  • the gripping means 6 supports the collapsible tube 100 by engaging it at or in the vicinity of the neck part 200.
  • the gripping means 6 is an aperture in the lower wall 21 of the chamber C3.
  • the edges of the aperture in the lower wall engage underneath a cap of the collapsible tube 100.
  • the gripping means simply engages an outer thread of the neck 200. This would be the case if the collapsible tube were provided with a removable screw cap.
  • the edges of the aperture could be rounded and made slightly thicker than the wall 21, so as facilitate insertion of the collapsible tube.
  • edges of the aperture may be foreseen with an elastic material, such as natural or synthetic rubber .
  • the gripping means could involve an aperture in the form of a threaded bore.
  • the thread in this case matches a correspondingly threaded neck part 200.
  • the gripping means 6 are provided in the lower wall 21 of the chamber C2 extending from the outer wall of the adaptor 2 and the aperture therein. Accordingly, the outer walls of the adaptor 2 form chamber C2. This is also the case in the embodiments of figs. 2 and 5.
  • the chamber C2 is provided as a separate chamber within the adaptor 2. This may involve advantages in the manufacture and possible assembly of the adaptor 2, the pump and the chamber C2 , as these may be manufactured as indi- vidual parts or they may be integrally manufactured.
  • An important aspect of the present invention is to ensure that external air has a limited degree of access to the storage cavity C3 inside of the collapsible tube 100, in order to compensate for the volume of highly viscous fluid dispensed from the dispenser, but at the same time limit the volume of air available for this action to prevent possible drying-out of the viscous fluid in the casing.
  • the limited air access to the inside of con- tainer may be achieved in a number of ways.
  • the gripping means in the form of the aperture in the wall 21.
  • the gripping means could be formed as arms projecting radially inward from the outer wall. The slits between the radially inward projecting arms would then form the means for the air access.
  • air would then be drawn from the exterior through a first gap between the casing 1 and the adaptor 2 and through a second gap between the neck part 200 and the wall 21, into the chamber C2 and eventually into the storage cavity C3.
  • the edges of the aperture in the wall 21 is formed from elastic material, e.g. to allow for various sizes of collapsible tubes, the abovementioned gap may not exist. In this case it would be necessary to provide separate air pressure equalizing access, e.g. in the form of pinholes .
  • pinholes In fig. 1 such pinholes are illustrated. Pinhole Al communicates with the interior of the casing 1, whereas the pinhole A2 communicates directly with the exte- rior of the dispenser.
  • air may pass through along the outside of the pump mechanism 3.
  • the pump mechanism in fig. 2 being a separate part fitted from the outside in the upper wall of the chamber C2.
  • the chamber C2 is formed integrally with the pump mechanism 3. Also in this case air may enter along the outside of pump mechanism 3. It may, however, also pass through a pinhole Al in the lower wall 21 of the chamber C2 or between the wall 21 and the neck part 200 of the collapsible tube 100. In fig. 3 the chamber C2 is also formed integrally with the pump mechanism 3. Here the air may pass through a pinhole Al in the lower wall 21 of the chamber C2 or between the wall 21 and the neck part 200 of the collapsible tube 100.
  • the adaptor 2 is integral with the casing 1.
  • air may pass between the lower wall 6 of the chamber C2 , through a pinhole Al or through a pinhole A2. All of these pinholes communicate directly with the external air, because no bottom wall is foreseen in the casing 1.
  • the reason for the lack of a bottom wall is the need to be able to introduce the collapsible tube 1 into the casing. This evidently cannot be done from the top, because the adap- tor 2 is integral with the casing 1.
  • the adaptor is detachably mounted on at one end of the casing 1 in which an opening la is provided.
  • the collapsible tube 100 may then be placed in the grip- ping means located in the adaptor 2 and the adaptor subsequently be placed over the opening la in the casing 1.
  • the casing 1 has a narrower upper part 11 over which the adaptor may be slid.
  • the adaptor then rests on the shoulders 13 formed by the transition from wide to narrow.
  • Other arrangements are well possible, e.g. the narrower part and the adaptor 2 could have matching threads. This would be particularly useful if the adaptor was to be wall mounted.
  • the dispenser of fig. 1 works in the following manner .
  • the pump mechanism 3 is activated by a down stroke of the plunger 5.
  • the stroke of the plunger 5 extracts a certain volume of the highly viscous fluid from the bottom of the collapsible tube 100.
  • the highly viscous fluid is extracted through the pump tube 4, the pump mechanism 3, the plunger 5 and dispensed through the nozzle 51.
  • the collapsible tube 100 collapses slightly. Since the chamber C2 and the storage cavity C3 are connected air from the chamber C2 replaces some of the extracted volume of highly viscous fluid.
  • the chamber C2 should have a substantial size.
  • the highly viscous fluid In the uncollapsed state the highly viscous fluid is able to fall to the bottom of the collapsi- ble tube, thereby forming a surface with air over it. Because of the lack of direct access of external air this surface is not exposed to any substantial degree of drying-out. Moreover, the highly viscous fluid pumped out will not be dry, as it is al- ways extracted from the bottom.
  • the collapsible fluid will not dry out and clog the pump mechanism 3, the pump tube 4 or the nozzle 51.
  • the invention thus provides a convenient clog free dispenser for collapsible tubes with highly viscous fluids, in particular such fluids as toothpaste or the like which are prone to dying out.
  • gripping means and the pressure equalizing means may take different forms than the examples de- scribed here.

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  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

La présente invention concerne un distributeur pour un liquide à très forte viscosité, notamment du dentifrice contenu dans un tube souple (100). Ce tube souple présente une partie de corps qui définit une cavité de stockage (C3) destinée audit liquide à très forte viscosité, ainsi qu'une partie de col (200) qui présente un épaulement externe (201) et un passage (200a) à travers lequel le liquide peut être extrait. Le distributeur selon cette invention comprend un adaptateur (2), une pompe et un système de prise de tube (6). Ladite pompe comprend un mécanisme de pompe (3) et un tube de pompe (4) qui est connecté audit mécanisme de pompe (3). Le système de prise de tube (6) est conçu pour prendre la partie de col (200) du tube souple (100) et pour tenir et fixer ce tube souple (100) dans une position suspendue sensiblement à la verticale. Ledit système de prise (6) et ladite pompe (3, 4) sont conçus pour permettre au tube de pompe (4) de s'étendre dans le tube (1) à travers ledit passage (200a) dans la partie de col (200), de manière libre, autorisant ainsi la compensation de liquide distribué par de l'air et empêchant un dessèchement du liquide.
PCT/DK2001/000659 2001-10-09 2001-10-09 Distributeur de liquides a tres forte viscosite WO2003030699A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/DK2001/000659 WO2003030699A2 (fr) 2001-10-09 2001-10-09 Distributeur de liquides a tres forte viscosite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DK2001/000659 WO2003030699A2 (fr) 2001-10-09 2001-10-09 Distributeur de liquides a tres forte viscosite

Publications (1)

Publication Number Publication Date
WO2003030699A2 true WO2003030699A2 (fr) 2003-04-17

Family

ID=8149446

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2001/000659 WO2003030699A2 (fr) 2001-10-09 2001-10-09 Distributeur de liquides a tres forte viscosite

Country Status (1)

Country Link
WO (1) WO2003030699A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200005831A1 (it) * 2022-03-24 2023-09-24 Baralan Int S P A Dispositivo di confezionamento, in particolare per un prodotto cosmetico, dotato di un flacone rimovibile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200005831A1 (it) * 2022-03-24 2023-09-24 Baralan Int S P A Dispositivo di confezionamento, in particolare per un prodotto cosmetico, dotato di un flacone rimovibile
WO2023180998A1 (fr) * 2022-03-24 2023-09-28 Baralan International S.P.A. Dispositif d'emballage, en particulier pour un produit cosmétique, comportant une bouteille amovible

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