IMPROVED LIQUID DISPENSER ASSEMBLY

Abstract: A liquid dispenser has support means (2) for a collapsible container (28) and connector means (6), including a stopper (8), to facilitate the connection of an actuator of the liquid dispenser to the collapsible container (28). The stopper of the connector means (6) is movable form a first position adjacent the support means (2) into a second position in which the stopper (8) of the connector means (6) connects with a collapsible container (28), whereby, when the liquid dispenser is in use, operation of the actuator causes the delivery of liquid from the dispenser. The collapsible container (28), which is formed as a pouch (38) made form flexible plastic, comprises a stop valve (52), which stop valve (52), upon movement of the stopper (8) of the connector means (6) into its second position, is moved from a first position, in which it prevents loss of liquid from a pouch (38), into a second position in which the stop valve (52) allows the delivery of a quantity of liquid from the dispenser upon operation of the actuator. The stop valve (52) comprises a depending elongate portion (60) of cruciform cross-section which facilitates the depletion of the whole contents form the pouch (38).

Description: IMPROVED LIQUID DISPENSER ASSEMBLY This invention is concerned with improvements in or relating to liquid dispensers and collapsible containers for use in such dispensers. Dispensers for dispensing liquid soaps, detergents and the like usually use collapsible containers, viz. pouches of plastic material, which pouches are supplied as throw away products which are disposed of when the contents thereof have been exhausted. A major disadvantage of a pouch made from a flexible plastic material, or the like, is the inherent tendency of the pouch to collapse as the contents thereof are depleted, the pouch undergoing the phenomenon of self sealing. This is an irritating and costly occurrence which interferes with the operation of the dispenser and leads to extra maintenance of the dispenser unit in order to correct the malfunction by, either inverting the pouch to release the contents thereof or by replacing the self sealed pouch. In either case there is a loss to the supplier of the dispenser, not only by way of added costs, but also by way of loss of goodwill from a dissatisfied customer. The present invention seeks to overcome, or at least mitigate, the drawbacks of currently available dispensers and pouches for use therewith. Thus the present invention conveniently provides a liquid dispenser comprising an actuator, operation of which actuator, when the dispenser is in use and a supply of liquid is provided in the dispenser, delivers a quantity of the liquid, the dispenser comprising support means for a collapsible container, connector means for connecting the actuator to a collapsible container supported by the support means, characterised in that the connector means is mounted for movement between a first position adjacent the support means and a second position in which the connector means connects with a collapsible container supported by the support means , when the dispenser is in use, to facilitate the delivery of liquid from the dispenser upon operation of the actuator. Preferably the connector means is mounted on a carrier supported by the support means for movement between its first and second positions. More preferably the carrier is pivotally mounted on the support means. The connector means conveniently comprises a stopper pivotally mounted on the carrier means. Preferably the collapsible container is a pouch of flexible material, for example, a plastic material. In one preferred embodiment of the invention the pouch includes a port, adapted in use, to be engaged by the stopper of the connector means for facilitating the delivery of a quantity of liquid upon the operation of the actuator. Conveniently, the pouch includes a stop valve located in the port, the stop valve being adapted, in use, to prevent the loss of liquid from the pouch until the pouch is located within the dispenser and the connector means is moved to its second position, in which second position the stop valve is engaged by the stopper of the connecting means, whereupon the stop valve is moved from a first position, in which the stop valve prevents loss of liquid from the pouch, to a second position in which the stop valve facilitates the delivery of a quantity of liquid upon the operation of the actuator. Preferably, the stop valve comprises a seal portion, which is a push-fit within the port, the stop valve also comprising a vent portion outwardly adjacent said seal portion for facilitating delivery of a liquid from the pouch when the dispenser is in use and the stop valve is moved to its second position. The stop valve also conveniently comprises an elongate portion which extends within the pouch to provide means whereby the pouch cannot self seal until all, or substantially all, of the liquid is removed therefrom. Preferably the vent portion of the stop valve is cruciform in cross-section. The elongate portion of the stop valve is also conveniently of cruciform cross-section. The present invention also conveniently provides a collapsible container for use in a liquid dispenser characterised in that the container is provided by a pouch of flexible material having a port and a stop valve located in the port and being adapted, in use, to prevent the loss of liquid from the pouch. The stop valve further conveniently comprises a seal portion, which seal portion is a push-fit within the port, the stop valve also comprising a vent portion outwardly adjacent the seal portion for facilitating delivery of a liquid from the pouch. Preferably, the stop valve also comprises an elongate portion which extends within the pouch to provide means whereby the pouch cannot self-seal until all, or substantially all, of the liquid is removed therefrom. Conveniently, the vent portion of the stop valve is of cruciform cross-section. Also, the elongate portion of the stop valve is preferably of cruciform cross-section. The present invention also provides a liquid dispenser assembly characterised by the combination of a liquid dispenser according to the first ten of the last fourteen preceding paragraphs and a collapsible container according to the last four of the preceding paragraphs. There now follows, by way of example of the present invention, a detailed description of a dispenser and a collapsible container for use therewith, which description is to be read with reference to the accompanying drawings in which: Figure 1 is an upper right hand segmental perspective view of parts of a dispenser and a collapsible container for use therewith; Figure 2 is a right hand side perspective view generally from the front of the parts shown in Figure 1 ; Figure 3 is a fragmental side view of the parts shown in Figure 1 with the collapsible container supported in the dispenser; Figure 4 is a front view corresponding to Figure 3; Figure 5 is a section view taken along the line V-V of Figure 4; Figure 6 is a fragmental side view corresponding to Figure 3 but showing connecting means of the dispenser in engagement with the collapsible container; Figure 7 is a front view corresponding to Figure 6; Figure 8 is a section view taken along the line VIII-VIII of Figure 7; Figure 9 is an upper right hand segmental perspective view corresponding to Figures 6, 7 and 8; and, Figure 10 is an upper perspective fragmental view of a stop valve of the collapsible container. Difficulties have been met when using dispensers provided with liquid soap, detergents and the like products in collapsible containers, viz. pouches of flexible plastic material. These difficulties have been caused by the tendency of the pouches to self-seal as the contents thereof are depleted leaving a proportion of the contents in the pouch. The dispenser assembly of the present invention obviates the drawbacks of prior arrangements and comprises a dispenser as disclosed in our co-pending Patent Application No. GB 9910468.4, details of which are imported herein by reference only. The dispenser assembly includes a housing, not shown, on which is fixedly secured a support bracket 2, which bracket 2 provides pivotal support for a carrier 4, see Figures 1 and 2. The carrier 4 provides support for a connector means 6 for a purpose to be described herein. As shown in Figures 1 and 2, the connector means 6 comprises a stopper 8 which extends below the carrier 4 and is pivotally mounted on the carrier 4 by sideways extending fulcrum arms 10 and 12. An upper portion 14 of the stopper extends through an aperture 16 formed in a wall 18 of the carrier 4 where it is connected by a tubular pipette 20 to a delivery pipe of the dispenser. The stopper 8 is tubular in cross-section and is provided with peripheral sealing fins 22 and an "O" ring seal 23 for a purpose to be described herein. The support bracket 2 is configured at a forward end portion 24 to receive a flange 26 of a collapsible container 28, see Figure 4, when the dispenser is in use. The flange 26 is a slide fit in a correspondingly shaped aperture 29 of the bracket 2. A forward end of the flange 26 is provided with slots 30 and 32 which, when the flange 26 is inserted into the aperture 28 are engaged by keying pins 34 and 36, see Figure 2. The collapsible container 28 comprises a pouch 38 of a flexible plastic membrane 40 with a tubular port 42 being provided towards an upper end portion 44 thereof, see Figure 4. The tubular port 42 has the flange 26 co-moulded thereon, which flange 26 extends forwardly, viewing Figure 1 , to provide a handle 46 by which the pouch 38 may be carried as it is mounted into the dispenser. The tubular port 42 also has conventional pouch sealing fins 48 co-moulded therewith at a lower end portion 50 thereof, see Figures 3 and 4. The collapsible container also comprises a stop valve 52, which valve 52 is located in and is a push-fit in a length-wise bore 54 of the tubular port 42. The stop valve 52 is of elongate form and comprises a peripheral seal portion 56, a vent portion 58 of cruciform cross-section outwardly adjacent the seal portion 56, see Figures 5, 8 and 10. The stop valve 52 further comprises a depending elongate portion 60 of cruciform cross-section the purpose of which will become clear hereinafter. When commissioning a dispenser for the first time or replacing a depleted pouch 38, having removed the depleted pouch 38, an operative grasps a new pouch 38 of liquid by it's handle 46 and offers the flange 26 thereof up to the aperture 29 of the support bracket 2. The flange 26 is pressed home until the slots 30 and 32 thereof are engaged by their respective pins 34 and 36. At this time the tubular port 42 is located below the stopper 8 of the connector means 6. The operative next moves the stopper 8 downwards from a first position as shown in Figures 3, 4 and 5 into a second position as shown in Figures 6, 7, 8 and 9, the carrier 4 pivoting about its mounting and the stopper 8 pivoting on its fulcrum arms 10 and 12. As the stopper 8 approaches its second position it enters into the bore 54 of the tubular port 42 where it engages an upper end 62 of the stop valve 52, which stop valve 52 is pushed downwards until it reaches the position shown in Figure 8. At this time, the peripheral sealing fins 22 and the "0" ring seal 23 engage the inside wall of the tubular port 42 to form a fluid tight seal therewith. The downward displacement of the stop valve 52 causes the seal portion 56 to be moved below the tubular port 42 out of engagement with the inside wall thereof. In this way a path "A" is opened between the pouch 38 and the connecting means, see Figure 8, thereby facilitating the delivery of a quantity of liquid from the pouch 38 upon operation of the actuator. It will be appreciated that the cruciform cross-section of the vent portion of the stop valve 52 provides part of the path "A". It will further be appreciated that the cruciform cross-section of the elongate portion 60 of the stop valve facilitates the depletion of the contents of the pouch 38. This is achieved because a continuous path is provided, from the bottom of the pouch to the vent portion 58 of the stop valve 52, even when the flexible wall of the pouch 38 collapses inwards. Although not described herein in detail, it will be evident that the plastic material for the pouch may be that which is suitable for purpose and the choice may depend upon the liquid to be contained therein. It will be obvious that the pouches are supplied with a cap, not shown, which cap is preferably of the screw cap type, which is removed before placing a pouch in the dispenser. In order to prevent the liquid in the stopper 8 from dripping when replacing a depleted pouch with a new one, the tubular stopper 8 is provided with a gauze membrane 62 extending across the inside thereof, see Figure 5.

Claims: CLAIMS 1. A liquid dispenser comprising an actuator, operation of which actuator, when the dispenser is in use and a supply of liquid is provided in the dispenser, delivers a quantity of the liquid, the dispenser comprising support means (2) for a collapsible container (28), connector means (6) for connecting the actuator to a collapsible container (28) supported by the support means (2), characterised in that the connector means (6) is mounted for movement between a first position adjacent the support means (2) and a second position in which the connector means (6) connects with a collapsible container (28) supported by the support means (2), when the dispenser is in use, to facilitate the delivery of liquid from the dispenser upon operation of the actuator. 2. A dispenser according to Claim 1, characterised in that the connector means (6) is mounted on a carrier (4) supported by the support means (2) for movement between its first and second positions. 3. A dispenser according to Claim 2, characterised in that the carrier (4) is pivotally mounted on the support means (2). 4. A dispenser according to either one of Claims 2 and 3, characterised in that the connector means (6) comprises a stopper (8) pivotally mounted on the carrier means (4). 5. A dispenser according to any one of the preceding Claims characterised in that the collapsible container (28) is a pouch (38) of flexible material (40). 6. A dispenser according to Claim 5 characterised in that the flexible material is a plastic material. 7. A dispenser according to either one of Claims 5 and 6 characterised in that the pouch (38) includes a port (42), adapted in use, to be engaged by the stopper (8) of the connector means for facilitating the delivery of a quantity of liquid upon the operation of the actuator. 8. A dispenser according to Claim 7 characterised in that the pouch (38) includes a stop valve (52) located in the port (42), the stop valve (52) being adapted, in use, to prevent the loss of liquid from the pouch (38) until the pouch is located within the dispenser and the connector means (6) is moved to its second position, in which second position the stop valve (52) is engaged by the stopper (8) of the connecting means (6), whereupon the stop valve (52) is moved from a first position, in which the stop valve (52) prevents loss of liquid from the pouch (38), to a second position in which the stop valve (52) facilitates the delivery of a quantity of liquid upon the operation of the actuator. 9. A dispenser according to Claim 8 characterised in that the stop valve (52) comprises a seal portion (56), which is a push-fit within the port (42), the stop valve (52) also comprising a vent portion (58) outwardly adjacent said seal portion (56) for facilitating delivery of a liquid from the pouch (38) when the dispenser is in use and the stop valve (52) is moved to its second position. 10. A dispenser according to Claim 9 characterised in that the stop valve (52) also comprises an elongate portion (60) which extends within the pouch (38) to provide means whereby the pouch (38) cannot self seal until all, or substantially all, of the liquid is removed therefrom. 11. A dispenser according to either one of Claims 9 and 10 characterised in that the vent portion (58) of the stop valve (52) is cruciform in cross-section. 12. A dispenser according to either one of Claims 10 and 11 characterised in that the elongate portion (60) of the stop valve (52) is of cruciform cross-section. 13. A collapsible container (28) for use in a liquid dispenser characterised in that the container (28) is provided by a pouch (38) of flexible material (40) having a port (42) and a stop valve (52) located in the port (42) and being adapted, in use, to prevent the loss of liquid from the pouch. 14. A container according to Claim 13 characterised in that the stop valve (52) comprises a seal portion (56), which seal portion is a push-fit within the port (42), the stop valve (52) also comprising a vent portion (58) outwardly adjacent the seal portion (56) for facilitating delivery of a liquid from the pouch (38). 15. A container according to either one of Claims 13 and 14 characterised in that the stop valve (52) also comprises an elongate portion (60) which extends within the pouch (38) to provide means whereby the pouch (38) cannot self-seal until all, or substantially all, of the liquid is removed therefrom. 16. A container according to either one of Claims 14 and 15 characterised in that the vent portion of the stop valve is of cruciform cross-section. 17. A container according to either one of Claims 15 and 16 characterised in that the elongate portion of the stop valve is of cruciform cross-section. 18. A liquid dispenser assembly characterise by the combination of a liquid dispenser according to any one of Claims 1 to 12 and a collapsible container according to any one of Claims 13 to 17.

Inventors: BUNOZ ETIENNE VINCENT, SALLOWS GEOFFREY, BUNOZ, ETIENNE, VINCENT, SALLOWS, GEOFFREY
Applicants: BRIGHTWELL DISPENSERS LTD, BUNOZ ETIENNE VINCENT, SALLOWS GEOFFREY, BRIGHTWELL DISPENSERS LIMITED, BUNOZ, ETIENNE, VINCENT, SALLOWS, GEOFFREY
Application year: 2001
Main classification: B65D5
IPC codes: B67D5