DISPENSERS FOR GASIFIED BEVERAGES

Abstract: A dispenser for a gasified beverage comprising a housing (1), a container (5) of gasified beverage in said housing, a container (8) of gas in said housing for topping up the beverage container with gas, and a single dispensing valve unit (4) operatively connected to both of said containers and manually accessible to the user, said valve unit being so arranged, as, when operated, both to dispense the beverage and to cause topping up gas to be released from the gas container and supplied to the beverage container.

Description: This invention relates to dispensers for gasified beverages which are supplied to the user in a suitable container and in a ready to drink, gasified, condition. Examples of such beverages are lemonade, beer and other more or less "fizzy" drinks, which are usually gasified by means of carbon dioxide (CO₂), or a mixture of gases. Often, such beverages are supplied to the user in relatively small containers, such as cans or bottles of a size of the order of a half-pint, all of whose contents will be used at a single time, and the beverage is then enjoyed in its pristine condition, straight from the previously sealed container. However, if the beverage is supplied to the user in a larger container, for example of one or two litres capacity, the whole contents of the container will often not be used at a single time, and the problem then arises that the degree of gasification, and thus the quality, of the beverage which is left in the container is reduced due to loss of gas into the empty space left in the container. Indeed, the remaining beverage may eventually go more or less "flat" after repeated opening and closing of the container. It has been proposed, as disclosed for example in GB-A-2180890, to provide such a beverage container, in a suitable housing, in combination with a container of CO₂, together with halving arrangements operable by the user to top up the beverage container with CO₂ whenever some of the beverage is dispensed. However, in this previous proposal it has been necessary for the user separately to operate valves for initially releasing CO₂ from the CO₂ container and subsequently dispensing the beverage and topping up the beverage container with CO₂, which is an undesirably complicated procedure for the non-technical, e.g. domestic, end user. Viewed from one aspect the present invention provides a dispenser for a gasified beverage comprising a housing, a container of gasified beverage in said housing, a container of gas in said housing for topping up the beverage container with gas, and a single dispensing valve unit operatively connected to both of said containers and manually accessible to the user, said valve unit being so arranged, as, when operated, both to dispense the beverage and to cause topping up gas to be released from the gas container and supplied to the beverage container, characterised in that said gas container has a normally closed outlet valve which is arranged to be physically opened on operation of said valve unit from a non-dispensing condition of the unit to a dispensing condition and to return to a closed condition when said valve unit is returned to the same non-dispensing condition. Preferably the said dispensing valve unit is mounted directly to the outlets of the two containers, of beverage and topping up gas respectively, to avoid the use of any pipe-work therebetween which might be prone to leakage problems in use. Preferably the beverage container is mounted and supported in a partially or wholly inverted condition with its outlet connected directly into the said dispensing valve unit. As a result the beverage container may be of a very simple and inexpensive type, without a dip tube or any other failure-prone means for extracting the beverage from the container. For example a container of the well known PET (polyethylene terephthalate) type may be used. The container of topping up gas may equally well be mounted and supported in a partially or wholly inverted condition, again with its outlet connected directly to the valve unit. Thus in a preferred form of the invention both of the said containers are mounted and located in the housing in an at least partially inverted condition, generally above the said dispensing valve unit, which unit is located at a bottom region of the housing, adjacent an outer wall thereof, conveniently accessible to the user. In a particularly preferred arrangement the beverage container is mounted in an inclined inverted position, transversely of the housing, the gas container is mounted in a substantially vertical inverted position on one side of the housing, and the valve unit is located adjacent a bottom edge of the housing, immediately below the gas container. In a preferred form of such an arrangement the beverage container is supported on the floor of the housing, the valve unit is suspended from the outlet of the beverage container and also supported by the housing floor, and the gas container is mounted on and supported by the valve unit. The said housing of the dispenser preferably comprises a box made of cardboard, corrugated board, or similar light-weight foldable material, preferably formed from a one-piece blank. It is preferably arranged to be supplied to the user as a closed box with a portion which is removable to provide user access to the said dispensing valve unit. It is also preferably provided with a carrying handle. Further features of a preferred form of such a box, in particular features thereof which provide support for the two containers and the valve unit therein, will become clear from the following description of an embodiment of the invention. The said dispensing valve unit may take various forms within the confines of the necessary features thereof referred to hereinbefore. However, it is preferably as disclosed in our patent application No. 89305041.9 of even date herewith. An embodiment of the invention will now be described by way of example and with reference to the accompanying drawings, in which:- Figure 1 is a perspective view of a beverage dispenser according to the invention, in its closed condition as supplied to a user; Figure 2 shows the dispenser turned on its side from the (carrying) condition of Figure 1, to its condition of use, but with the housing partly opened to show the interior structure; Figure 3 is a transverse vertical cross-section of the dispenser in its condition of use; Figure 4 is a partial horizontal cross-section; Figure 5 is a plan view of a cardboard blank for making the housing; Figure 6 is an exploded perspective view of a valve unit; and Figure 7 is a vertical cross-sectional view of the assembled unit of Figure 6, taken axially through the beverage dispensing valve. Referring first to Figure 1, a beverage dispenser according to the invention, as provided to e.g. a domestic user, comprises a housing in the form of a closed cardboard box 1 provided with a carrying handle 2 and formed with a portion 3, extending around one edge of the box, which is readily removable by way of perforations to expose the dispensing valve unit of the dispenser. In use, and referring now to Figures 2 to 4, the box is turned on its side from the Figure 1 position and the portion 3 is removed to expose the dispensing valve unit 4. Other than this, the box is not disassembled by the user, the illustration of the box in its partly disassembled form in Figure 2 being only for the purpose of the present description of its internal features. Referring particularly to Figure 3, a beverage container in the form of a PET bottle 5 is supported in the box on a block 6 in an inclined inverted position so that its outlet 7 points downwards towards the dispensing valve unit 4, which unit is sealingly connected to the bottle outlet to receive the beverage therefrom by gravity flow, assisted by the gas pressure above the liquid. A gas container in the form of an aerosol can 8 containing CO₂, or CO₂ and other mixed gases, is mounted on and sealingly connected to the valve unit, in a vertical inverted position. Both the beverage container 5 and the gas container 8 engage with and are laterally supported by the side walls of the box, and indeed the interconnected combination of the two containers and the valve unit is a snug fit in the box so as to be firmly supported all round by the walls of the box both during transportation and storage (in the Figure 1 position) and in use. The PET bottle 5 is preferably shaped to have a longitudinal axis of symmetry, as shown, so as to permit its connection to the dispensing valve in any position of axial rotation. The base of the bottle, although it could be hemispherical or of other shapes, is preferably of substantially frustro-conical form as illustrated, so as to maximise use of the available space, and to increase the area of contact between the bottle and the inside walls of the box, for stability during transportation and use. Referring particularly to Figures 2 and 4, the side walls 9 of the box are provided with hinged extensions whose successively hingedly interconnected panels comprise, firstly, panels 10 forming innermost layers of the end wall 11 of the box, secondly upper and lower panel portions 12 and 13 which laterally support the gas container 8 and the valve unit 4 respectively, thirdly panels 14 which laterally support the beverage container 5, and lastly flaps 15 which tuck in between the container 5 and the side walls of the box to stabilise this panel structure. The supporting structure within the box is completed by a flap 16 on a panel 17 hinged to the top wall 18 of the box, which flap 16 tucks through slots 19 in the panels 10 and provided underneath support for the gas container 8. The various parts of the box as described above are also identified in the blank for making the box, shown in Figure 5. The dispensing valve unit 4 is as disclosed in our patent application No. 89305041.9, mentioned previously, to which reference may be made for further details. Briefly, the valve unit has an upstanding operating handle 20 which, when rotated in either direction, has the effect of opening the (conventional) valve of the gas container 8 during a first part of its movement, so as to charge a chamber in the valve unit with pressurised CO₂ from the container, and then, during the next part of its movement, both opening a flow path for the beverage out of the container 5 and through the valve unit to the exterior (via a dispensing orifice in the underside of the valve unit) and opening a flow for the pressurised CO₂ from the said chamber into the beverage container so as to top up the same with CO₂. Returning the operating handle to its vertical position closes the said flow paths, in the reverse order. Referring in more detail to Figures 6 and 7, the dispensing valve unit 4 includes two tubular valve housings 21 and 22 of the beverage outlet valve and gas inlet valve respectively, each of which receives a movable valve member 23, 24. A sleeve 25 which mounts the handle 20 has a rearward extension 26 by means of which it is rotatably mounted on a forward extension 27 of the housing 21, and a terminal ring portion 28 of the extension 26 is formed with a slot 29 which provides a cam for operating a gas release valve mechanism now to be described. The bottom end of the inverted gas container 8 is received in a support member 30 which clips into the open top of a housing 35. The closure valve operating pin 31 of the gas container is received in a tubular socket 32 of a gas container valve operator generally indicated at 33, mounted for vertical movement in key-ways 34 in the side walls of the housing 35 to open and close the gas container valve. The operator 33 comprises a bottom member 36 formed with a transverse rail 37 which engages in the slot 29 in the extension 26 of the handle-mounting sleeve 25, a top member 38 formed with the socket 32 and, clamped between the bottom and top members 36 and 38, a pressure equalising diaphragm member 39 formed with a closure element 40 engageable in a gas delivery hole 41 in the bottom of the socket 32. A gas storage chamber 42 is defined between the diaphragm member 39 and the bottom member 36, and communicates with the housing 22 of the gas inlet valve. In operation, the first part of the operating movement of the handle 20, in either direction from its illustrated closed position, raises the gas container valve operator 33, by way of the cam slot 29 and the rail 37, to open the gas container closure valve 31. Further movement of the handle 20 causes the beverage outlet valve member 23 to be pushed back by the action of a pin 43 in a helical slot 44, to open a beverage flow path past the valve member 23 to a delivery aperture 45. At the same time, the gas inlet valve member 24 is released for rearward movement to admit topping up gas into the beverage container. When the desired amount of the beverage has been delivered through the aperture 45, the handle 20 is returned to its closed position. A first part of this closing movement causes the beverage outlet valve member 23 to be pulled forward to its closed position by the pin 43, assisted by the liquid and gas pressure in the beverage container. At the same time the gas inlet valve member 24 is pushed towards its closed position. Further movement of the handle to its closed position finally permits closure of the gas container closure valve 31, by downward movement of the operator 33.

Claims: A dispenser for a gasified beverage comprising a housing (1), a container of gasified beverage (5) in said housing, a container of gas (8) in said housing for topping up the beverage container with gas, and a single dispensing valve unit (4) operatively connected to both of said containers and manually accessible to the user, said valve unit being so arranged, as, when operated, both to dispense the beverage and to cause topping up gas to be released from the gas container and supplied to the beverage container, characterised in that said gas container has a normally closed outlet valve which is arranged to be physically opened on operation of said valve unit from a non-dispensing condition of the unit to a dispensing condition and to return to a closed condition when said valve unit is returned to the same non-dispensing condition. A dispenser as claimed in claim 1, wherein said dispensing valve unit (4) is mounted directly to the outlets of the two containers (5,8), of beverage and topping up gas respectively. A dispenser as claimed in claim 1 or 2, wherein the said beverage container (5) is mounted and supported in the said housing (1) in a partially or wholly inverted condition, for gravity feed of the beverage to the said dispensing valve unit (4) in use. A dispenser as claimed in any preceding claim, wherein the said container (8) of topping up gas is mounted and supported in the said housing (1) in a partially or wholly inverted condition. A dispenser as claimed in claims 2, 3 and 4, wherein the beverage container (5) is mounted in an inclined inverted position, transversely of the housing (1), the gas container (8) is mounted in a substantially vertical inverted position on one side of the housing, and the valve unit (4) is located adjacent a bottom edge of the housing, immediately below the gas container. A dispenser as claimed in claim 5, wherein the beverage container (5) is supported on the floor of the housing (1), the valve unit (4) is suspended from the outlet (7) of the beverage container and also supported by the housing floor, and the gas container (8) is mounted on and supported by the valve unit. A dispenser as claimed in claim 6, wherein the beverage container (5) and the gas container (8) are laterally supported by side walls (9) of the housing. A dispenser as claimed in claim 7, wherein the interconnected combination of the two containers (5,8) and the valve unit (4) is a snug fit in the housing (1) so as to be firmly supported all round by the walls of the housing. A dispenser as claimed in any preceding claim, wherein the said housing (1) comprises a box made of cardboard, corrugated board, or similar light-weight foldable material. A dispenser as claimed in claim 9, wherein the said housing (1) is a closed box with a portion (3) which is removable to provide user access to the said dispensing valve unit (4). A dispenser as claimed in claim 9 or 10, wherein two of the side walls (9) of the said box (1) are provided with hinged extensions whose successively hingedly interconnected panels comprise, firstly, panels (10) forming innermost layers of an adjacent end wall (11) of the box, secondly upper and lower panel portions (12,13) which laterally support the said gas container (8) and the said valve unit (4) respectively, thirdly panels (14) which laterally support the said beverage container (5), and lastly flaps (15) which tuck in between the beverage container and the said side walls of the box to stabilise this panel structure.

Inventors: PARKER, ALAN
Applicants: SCA PACKAGING LIMITED
Application year: 1989
Main classification: B67D1
IPC codes: A23L2, B01F1, B65D77, B67D1