APPARATUS FOR DISPENSING A FROZEN PRODUCT

Abstract: Dispensing apparatus is provided for dispensing a frozen product, such as ice cream, in portions. The apparatus uses a pre-­ filled container of product which is located in a housing of the apparatus. The container is deformable and has an outlet through which the product issues on the application of drive to the container to deform and re­ duce the internal volume of the container. Dispensing means is operated by the drive and a valve controls the discharge of product during dispensing. To maintain the product at a low temperature the container and the outlet are located in a refrigerated housing.

Description: Apparatus for dispensing a frozen product. This invention relates to dispensing apparatus and in particular to apparatus for dispensing frozen material such as ice cream or other frozen, semi-frozen or chilled confectionery. Ice cream is usually dispensed at the point of sale in prepacked form, by scoops out of containers in a refrigerator, or in a flow from a freezing, mixing and dispensing machine. Prepacked ice cream is relatively expensive to produce and distribute but has the advantage that a wide range of flavours and types of ice cream can be sold at a single outlet. The only requirement is a refrigerator to keep the product frozen. Dispensing ice cream by scoop from a container has the advantage of cheapness in production and transport but dispensing of the ice cream is slow, especially when the proper hygiene precautions are taken. Scoop-dispensed ice cream also provides the facility for providing a range of ice cream including those containing fruit, nuts and other solids. Machines for dispensing so called 'soft' ice cream are known in which liquid ingredients are loaded into the machine which mixes, freezes and dispenses the ice cream into cones or other containers. Such machines have hitherto had high power requirements and are expensive to manufacture. Different mixing and dispensing equipment is required for each flavour so it is usual for such machines to have only a one, two or, perhaps, three flavour facility. Moreover the machines are often difficult to maintain and due to the nature of the product which must be used the ice cream does not compare favourably with the quality possible with scoop dispensed products. U.S. Patent 3677443 discloses a soft serve ice cream dispensing machine in which a flexible bag is located in an outer housing and the bag is filled with the ingredients to make the ice cream. The ingredients are subsequently cooled in the machine to an ice cream dispensing temperature. The flexible bag is discharged by gas pressure being applied to the exterior of the bag to discharge the contents to a discharge nozzle. Although the flexible bag is detachable from the apparatus it is not removable until the pressure surrounding the bag is released. Moreover only ice cream which is soft can be dispensed and the apparatus provides potential hygiene problems. In U.S. Patent 4,452,823 there is described a dispenser for frozen food product in which a collapsable container for the product is fitted with a spout through which the product is extruded directly into a receiving member. An object of the invention is to provide dispensing apparatus which overcomes problems and disadvantages of existing systems. The present invention is distinguished from the prior art in that the container means has two opposed ends between which is a deformable side wall, one end of the container means comprising an end wall engaging abutment means defined by a container housing and outlet tube means is located at said one end wall, and drive means includes a plunger which engages the other end of the container means opposite to the outlet tube, whereby upon operation of the drive means the length of the container means is progressively reduced. Preferably said side wall is corrugated and the corrugations close up during said deformation so that said opposed ends approach one another. Conveniently said outlet tube means is formed integrally with the container means and said tube means provides means for pre-filling the container means with product prior to location in the housing. In one arrangement the abutment means includes an opening for receiving the container outlet tube means. Conveniently the outlet tube means communicates with an outlet duct in which shut-off valve means is located, the outlet tube being in sealing engagement with the outlet duct during operation. Said container means may have a generally cylindrical body having said side wall and circular opposed end walls, said other opposite end wall being arranged to be deformed upon engagement by the plunger and moved inwardly within the side wall. Preferably the drive means includes a drive motor operable to drive the plunger in an operative direction to deform the container means and in an inoperative, reverse direction to disengage from the container means. The drive means may include motor means rotation of which causes the product to be dispensed by driving a plunger against the container means, and the plunger moves parallel to the axis of the container so that rotation of the motor effects a dispensing operation by deforming the container. The valve controlling the discharge of product during operation of the drive means may have a flexibly-walled tube and the valve is operated by pinching together the walls of the tube by control means. Further features of the invention will appear from the following description of an embodiment of the invention given by way of example and with reference to the drawings in which:- Fig. 1 is a part sectional front elevation, Fig. 2 is a part sectional side elevation, Fig. 3 is a general elevation, Fig. 4 is a side view of a container, Fig. 5 is a side view of a container outlet, Fig. 6 is a side elevation showing alternative outlet means, and Fig. 7 is a plan view showing other outlet means. Referring to the drawings dispensing apparatus is shown which includes an upright frame defining three or more compartments or housings. An upper compartment 10 houses a drive motor 11 and transmission means 12; an intermediate compartment 13 houses a further part of the transmission means and a container 14 for the product to be dispensed; and a lower compartment 15 houses the discharge means 16 for discharging the product from the container 14. A rear part 17 of the apparatus houses a compressor and refrigeration means (not shown) which may be of known form. Each of the intermediate and lower compartments 13 and 15 are insulated and refrigerated, at least in part, to retain the product in the container 14 and in the discharge means 16 at the necessary low temperature during storage and dispensing. The drive means for the dispenser as best seen in Fig. 1, includes the drive motor 11, conveniently a D.C. electric motor, the rotary drive shaft of which drives, through a right angle or bevel gear 20, a vertical shaft 21 including a clutch 22 and carrying a drive pulley 23. Below the pulley 23 the shaft 21 is threaded and threadedly engages a pressure bar 24. A drive belt 25 passes around the pulley 23 to a further pulley 26 which is mounted on a further vertical shaft 27 which is also threaded below the pulley 26 and which threadedly engages the opposite end of the pressure bar 26. At their lower ends the shafts 21 and 27 are journalled into a plate 28 which forms a platform part of the frame and divides the upper and intermediate compartments 10 and 13. The upper ends of the shafts 21 and 27 are journalled into the upper wall 32 of the compartment 10. The pressure bar 24 extends between the shafts 21 and 27 and it will be seen that as the motor 11 rotates and the clutch 22 is energised the shafts 21 and 27 are simultaneously rotated to drive the bar 24 up and down. The underside of the bar 24 carries a plunger 31 which engages the top of a container 14 (Fig. 2) to discharge product from the container. The plunger 31 is shaped to engage a recess of the shape shown in dotted lines 33 in Fig. 4. Alternatively the container can be deformed to form the recess 33. The container 14 is located in the compartment 13 by a part-cylindrical receiving means 35 defined by two part-cylindrical plates 36 and 37 which are spaced apart along each side to define vertical slots to admit the pressure bar 24 as the plunger 31 is moved up and down. The plates 36 and 37 can, however, be omitted. The plates 36 and 37 are fixed to a base plate 38 which is hinged at its front edge 39 to the frame plate 38. The underside of the base plate 38 is supported by the frame plate 28 and part 38A of the plate 38 supports the lower end of the container and is of corresponding shape. A central opening in that part 38A of the base plate is aligned with a corresponding opening 40 in the frame plate 28 to receive an outlet 41 of the container. The opening 40 is formed with a Morse non-stick taper and the outlet 41 is formed with a corresponding taper to cause the outlet 41 to engage as a taper fit in the opening 40. The outermost end of the outlet is formed with a screw-threaded portion 42 whereby a cap (not shown) may be fitted to the container when stored. The plate 36 is provided with a handle 43 and the arrangement of the receiving means 35 and plate 38 is such that the container 14 can be readily loaded and unloaded before and after discharge of the product. This is achieved by raising the plunger 31 to its uppermost position by operation of the motor 11; opening a door 44 at the front of the compartment 13 to gain access to the interior; then grasping the handle 43 to pivot the plate 38 forwards about the hinge 39. The container 14 can then simply be slid into the space defined by the plates 36 and 37 with its outlet 41 located in the opening in the base plate portion 38A. The plate 38 is then tilted backwards until it engages with the frame plate 28 whereupon the outlet 41 is made a taper fit in the opening 40. Below the frame plate 38 and fixed to its underside is a fixed block 45 (Fig. 2) with an opening 46 aligned with the opening 40 and partially tapered to receive the lower end of the container outlet 41. Below the fixed block 45 is a longitudinally slidable discharge member 47, shown in Fig. 2 in a discharge position. In this position a duct 48 in the member 47 has its inlet end aligned with the opening 46 in the block 45. From the inlet end the duct 48 extends generally horizontally along the member 47 towards a discharge nozzle 49 directed downwards. A shut-off valve member 51 is carried on the discharge member 47 for movement up and down under the control of, in this case, a manually-operated operating arm 52. The arm 52 is pivotally supported at 53 on the member 47 at one end, the opposite end having a handle 54. As the valve member 51 is moved down it passes into the discharge nozzle 49 to prevent product passing from the duct 48 into the nozzle 49. On upward movement of the arm 52 and hence the member 51 the nozzle 49 is opened and the upper end of the member 51 engages a switch arm 55 which operates a switch 56 for actuating the motor 11. The slidable member 47 is keyed to the fixed block 45 and if the dispenser is to remain out of action for a period, the member 47 may be pushed in to a position which prevents product from passing from the container 14 into the duct 48. Moreover the product in the duct 48 can be retained frozen because the member 47 when pushed in can be substantially wholly located within the lower compartment 15 which is kept in a refrigerated condition. Instead of the duct 48 extending forwardly for dispensing at the front side of the apparatus or in addition to a forwardly extending duct, a duct may extend towards the rear of the apparatus for dispensing at this position. Moreover the apparatus may be adapted for self service operation. In the latter case the apparatus, once energised (such as by a coin freed device) will automatically dispense a predetermined quantity of product. This may be achieved by replacing the manually operated sliding member 47 by a powered arrangement and by suitable control of the motor 11. In an alternative arrangement to that illustrated the container outlet may include a portion integral with the container 14, which extends through the opening 40 into a lower chamber and communicates with a deformable tube portion constituting part of a valve for controlling the discharge of product from the container. The valve may also include a pneumatically operated piston and cylinder whose axis lies generally horizontally at a right angle to the deformable tube portion. The piston rod of the piston and cylinder carries on its free end a member for engaging and deforming the portion to open and close the portion and thereby enable product to pass along the portion during dispensing or to prevent discharge of the product by pinching the sides of the tube portion together. An abutment plate lies against the tube portion to resist the action of the piston and cylinder during closure of the valve. At the free end of the valve, downstream of the deformable tube portion, is located an outlet nozzle portion which is preferably shaped to shape the product during its discharge to give an attractive appearance. Normally the product is dispensed into a container (not shown) which may be a cone or other edible container, or a receptacle such as a carton. Controls 59 are located on the front wall of the upper compartment 10 for controlling the dispensing operation. Normally the controls would be set so that the container 14 is put under constant pressure by the motor 11 and the clutch 22 being energised to rotate, thereby tending to deform the container to reduce its internal volume and force the product through the outlet. Flow of product is controlled by the valve 51 so that to dispense the product it is only necessary to open the valve (as shown in Fig. 2) thereby allowing the product to pass along the duct 48 of the outlet and hence through the nozzle 49 for the required duration. If desired the operation of the motor 11 and/or clutch may be automatically timed so that a predetermined amount of product is discharged over the predetermined time period. Upon deenergisation of the clutch 22 pressure on the container may be released. However in cases where product is only to be dispensed infrequently, or for example during overnight periods, the motor 11 may be deenergised to release pressure on the container 14. Upon the container 14 becoming empty the motor 11 is driven to retract the plunger 31 to its full extent to raise the plunger 31 and the empty container 14 is removed and replaced by a fresh, full cotainer. The container 14 is shown in more detail in Fig. 4 and comprises a generally cylindrical body 60 in which is formed a series of corrugations 61 extending circumferentially so that the corrugations can be deformed in the axial direction of the body in the manner of a concertina or bellows. Alternatively the body 60 can be arranged to deform and reduce its internal volume by folding over the side walls on itself rather than using a bellows arrangement. At the outlet end of the container the body presents a flat surface 62 at right angles to its axis so that the surface may engage the upper surface of the base plate 38. Internally the lower or outlet end of the container may be profiled to taper towards its lower end and towards the outlet 41. At the opposite end of the container the body is formed with the recessed portion 33 to receive the plunger 31. The container is preferably made of flexible plastics material and may be formed by blow moulding. During manufacture the outlet 41 is formed integrally of the body. In dispensing frozen product the container needs to be deformable at relatively low temperatures of, say, -10°C to -25°C. The container will normally be filled with product at the site of a product manufacturer and supplied as and when necessary to the apparatus user who may be a mobile or fixed retail outlet, a restaurant or other facility. Product is poured into the container through the opening which, in a dispensing operation, is the outlet, and the product is then frozen for distribution. It will be appreciated that several dispensing apparatus each with their associated container and individual discharge control means may be provided in a single cabinet whereby several different products or different product flavours can be dispensed. If any of the dispensing means should fail or require maintenance a replacement can be easily fitted by forming each dispensing means as a module. Moreover the manner of dispensing and the nature of the container is such that the product can take many forms and can include solids such as fruit, nuts and chocolate. Part of the apparatus, for example the compartment 13, may be arranged to provide a refrigerated storage area for filled spare containers. If desired the dispensing means may be made manually operable to obviate the need for a power supply, other than for refrigeration, if required. For mobile apparatus the cooling function for the cabinet may be provided at a fixed location and effected overnight, the cabinet being adequately insulated to keep the desired temperature of the product in the cabinet. Although it is preferred that the container is cylindrical it will be seen that other shapes are possible. Moreover although the apparatus is illustrated with the container 14 in an upright position the container may be arranged horizontally or at a vertically inclined position. As an alternative to the dispensing arrangement of Fig. 2 an arrangement such as shown in Fig. 6 may be employed. In the Fig. 6 arrangement the container 14, the drive arrangement and the container outlet 41 may be arranged as for the previous embodiment. But instead of the duct arrangement 48 there is provided below the block or manifold 45 a three-way valve 70, the valve 70 communicating selectively between the container interior and a dosing device 71, and between the dosing device 71 and an outlet duct 72. Product is conducted from the valve 70 to a piston and cylinder device 73 through a pipe 74 during a container discharge operation. The piston and cylinder device 73 includes a cylinder 75 in which is located a piston 76 for defining a compartment for receiving product into the cylinder from the container 14. Movement of the piston 76 in the cylinder 75 is achieved by a pneumatically-operated piston and cylinder drive 78. Movement of the drive in a filling direction (to the left as seen in Fig. 6) allows product to be directed into the cylinder 75 against the piston 76. Operation of the valve 70 to communicate between the cylinder 75 and the outlet duct 72 enables the cylinder 75 to be discharged by operation of the piston and cylinder drive 78. A quantity of product equal to the swept volume of the cylinder 75 is discharged along the pipe 74 through the valve 70 and along the duct 72 towards a discharge nozzle 80. The nozzle outlet 80 is controlled by a valve member 51′ movable up and down in the nozzle outlet 80 under the action of a further pneumatically-operated piston and cylinder device 81. A piston and cylinder device 82 actuates the valve 70 between said positions and the duct 72 is defined by a fixed member 83. The stroke of the piston 76 in the cylinder 75 can be adjusted to vary the amount of product to be dispensed, if desired. For this purpose a piston 78A of the drive 78 is mounted on a piston rod 78B which rod protrudes from the cylinder 75 and carries a longitudinally adjustable member 85. Proximity switches 86 and 87 lie adjacent the path of the member 85 to be operated upon movement of the piston 78A and piston rod 78B and to start and stop the drive 78. It will be seen that this arrangement lends itself to automatic operation of the dispensing of predetermined amounts of product. The dispensing of product thus follows a sequence, starting with the valve 70 in a position to direct product from the container to the dosing device 71, in which the first step is to fill the cylinder 75. Then, when filled, the cylinder 75 is emptied, having moved the valve 70 to its other position, by operation of the drive 78 and opening of the valve member 51′. The product is discharged through the nozzle outlet 80. When discharge is complete the valve member 51′ is closed and the valve 70 is returned to its initial position to refill the cylinder 75 ready for a commencement of a repeat sequence. The various drive means and valves may be controlled to follow the sequence automatically to allow coin freed or other dispensing operation by the customer or an operative. It will be appreciated that the drive motor 11 for deforming the container 14 may be operable at variable speed to vary the rate at which product is discharged from the container. It is also possible to have two or more outlets for simultaneously dispensing product at two or more locations from the same container. For example there may be outlets on different sides of the apparatus. A further alternative to the discharge arrangements of Figs. 2 and 6 is shown in Fig. 7. In Fig. 7 the apparatus includes the same three compartment configuration and container compression arrangement as described previously but, instead of the discharge arrangements for discharging the product from the container outlet 41, described above, the outlet 41 discharges directly into a fixed duct 90. The duct 90 communicates with a flexible length of ducting 91 which, in turn, communicates with a body 92 having an internal duct 93 leading to a downwardly directed outlet 94. A valve arrangement (not shown) in Fig. 7 of the kind shown in Fig. 2 or Fig. 6 controls the discharge of product along the duct 90, the ducting 91 and the duct 93. The duct arrangement enables the body 92 to be moved backwards and forwards into and out of the lower compartment 15 in the direction of the arrow P depending on whether a dormant or operative action of the dispensing apparatus is required. Moreover the provision of the flexible ducting 91 enables the door 44 to be opened and closed without disconnection of any of the discharge arrangements. For this purpose the door 44 is hinged at 95 adjacent the flexible ducting. For the movement P and for the door opening movement the flexible ducting is able to accommodate the relative movement between the body 92 and the fixed duct 90. As seen in Fig. 7 the body 92 is in its discharge position, the dormant or non-dispensing position being shown in chain line 92′.

Claims: Dispensing apparatus for dispensing a frozen product which comprises, deformable container means 14 having outlet tube means 41, the container means being arranged to be releasably located in the apparatus after pre-filling the container means with product to be dispensed; dispensing means including drive means 11, 31 for deforming the container means 14 to reduce its internal volume and cause the product to issue from the outlet tube means 41 in incremental quantities by progressive deformation of the container means; shut-off valve means 51, 52, 53 for controlling the discharge of product from the outlet tube means; a housing 35 defining a chamber for receiving the container means; refrigeration means whereby the housing 35, the container means 14 and product are kept at a low temperature; and location means 36, 37 for the container means 14 whereby the container means is secured releasably in the housing 35; characterised in that the container means 14 has two opposed ends 33, 62 between which is a deformable side wall 60, 61, one end of the container means comprising an end wall 62 engaging abutment means 38A defined by the housing 35 and said outlet tube means 41 being located at said one end wall 62, the drive means 11, 31 including a plunger 31 which engages the other end 33 of the container means 14 opposite to the outlet tube 41, whereby upon operation of the drive means the length of the container means 14 is progressively reduced. Dispensing apparatus according to claim 1 characterised in that said side wall 60, 61 is corrugated and the corrugations 62 close up during said deformation so that said opposed ends 33, 62 approach one another. Dispensing apparatus according to claim 1 or 2 characterised in that said outlet tube means 41 is formed integrally with the container means 14 and said tube means 41 provides means for pre-filling the container means 14 with product prior to location in the housing 35. Dispensing apparatus according to any one of the preceding claims characterised in that the abutment means 38A includes an opening 42 for receiving the container outlet tube means 41. Dispensing apparatus according to any one of the preceding claims characterised in that the outlet tube means 41 communicates with an outlet duct 48 in which the shut-off valve means 51, 52, 53 is located, the outlet tube 41 being in sealing engagement with the outlet duct 48 during operation. Dispensing apparatus according to any one of the preceding claims wherein said container means 14 has a generally cylindrical body 60, 61 having said side wall and circular opposed end walls 33, 61, said other opposite end wall 33 being arranged to be deformed upon engagement by the plunger and moved inwardly within the side wall 61. Dispensing apparatus according to any one of the preceding claims wherein the side walls 61 are formed in the manner of bellows, the outlet tube means 41 projects from said one end wall 62 and is tapered inwardly towards its outer end. Dispensing apparatus according to any one of the preceding claims characterised in that the drive means includes a drive motor 11 operable to drive the plunger 31 in an operative direction to deform the container means 14 and in an inoperative, reverse direction to disengage from the container means 14.

Inventors: MCGILL, SHANE ROBERT
Applicants: MCGILL, SHANE ROBERT
Application year: 1988
Main classification: A23G9
IPC codes: A23G9