WO1999065818A1 - Distributeur de boissons, detecteur de concentre et recipient contenant du concentre - Google Patents

Distributeur de boissons, detecteur de concentre et recipient contenant du concentre Download PDF

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Publication number
WO1999065818A1
WO1999065818A1 PCT/GB1999/001889 GB9901889W WO9965818A1 WO 1999065818 A1 WO1999065818 A1 WO 1999065818A1 GB 9901889 W GB9901889 W GB 9901889W WO 9965818 A1 WO9965818 A1 WO 9965818A1
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WO
WIPO (PCT)
Prior art keywords
concentrate
container
drink
received
detector
Prior art date
Application number
PCT/GB1999/001889
Other languages
English (en)
Inventor
Paul Rupert Judge
James Prince Love
John Gordon Piggott
Stephen John Lane
Original Assignee
Isoworth Uk Limited
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 Isoworth Uk Limited filed Critical Isoworth Uk Limited
Priority to AU42839/99A priority Critical patent/AU4283999A/en
Publication of WO1999065818A1 publication Critical patent/WO1999065818A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D1/00—Apparatus or devices for dispensing beverages on draught
    • B67D1/08—Details
    • B67D1/12—Flow or pressure control devices or systems, e.g. valves, gas pressure control, level control in storage containers
    • B67D1/1247—Means for detecting the presence or absence of liquid

Definitions

  • the present invention relates to drink dispensers and is particularly concerned with an apparatus for determining whether a drink dispenser is able successfully to dispense a drink.
  • Drink dispensers generally comprise a source of diluent and a flavoured concentrate supply means arranged so that concentrate is mixed with discharged diluent to add flavour to it.
  • the diluent may for example be water, which may or may not be carbonated, to be added to an appropriate concentrate such as cola, lemon and lime, beer, tea or coffee or it may be milk to be added to a milk shake concentrate or tonic water to be added to a spirit such as vodka or gin.
  • the concentrate is usually in liquid form but may for example be a powder.
  • the concentrate is generally supplied in a replaceable container but may be contained in a refillable reservoir. A problem arises when the concentrate supply means is exhausted and the user is then supplied with an unflavoured or insufficiently flavoured drink.
  • an apparatus for determining whether a drink dispenser for dispensing a drink comprising a diluent and a concentrate is able successfully to dispense a drink comprises a detector for detecting whether a container for holding concentrate for a drink to be dispensed has sufficient concentrate to make a drink.
  • the apparatus can reliably determine whether a drink including the detected concentrate can be dispensed.
  • the drink to be dispensed will ideally contain an amount of dilutent and a predetermined target amount of concentrate, and the detection means will preferably determine whether or not the target amount of concentrate can be dispensed.
  • the detection means may be arranged either to signal an insufficiency of concentrate only when the remaining concentrate reaches the lesser amount, or to signal a sufficiency when the remaining concentrate exceeds the lesser amount.
  • a first signal may be provided to indicate sufficiency
  • a second signal may be provided to indicate an insufficiency.
  • an apparatus for determining whether a drink dispenser is able successfully to dispense a drink comprises a support for receiving at least partially a container for holding concentrate for a drink to be dispensed by a drink dispenser; a detector for detecting whether a container received on the support has sufficient concentrate to make a drink; and means for providing an electrical signal indicating whether or not the container has sufficient concentrate to make a drink.
  • the means for providing an electrical signal can be used to prevent the dispenser from accepting payment, which may be in the form of money or smart card credits or if the dispenser can dispense a variety of drinks, for indicating that the drink corresponding to that ingredient is not available.
  • the detector preferably does not compromise the integrity of a container mounted in the support.
  • the detector preferably has a structure which is external to a container received on the support and does not intrude into the container's interior. The contents of a received container cannot then be contaminated by the detector.
  • the detector preferably comprises an electrical circuit with a component having a dielectric and concentrate in a container received on the support preferably acts as the dielectric for said component.
  • the component preferably comprises a pair of plates forming a capacitor and arranged to be able to detect whether a container received on the support has sufficient ingredient to make a drink.
  • the pair of capacitive plates may be arranged such that, in use, at least a portion of a container is received on the support between them.
  • the capacitance of the detector then varies dependent upon the level of ingredient in a container received on the support.
  • the capacitance of the detector plates may be measured by any suitable electric circuit.
  • the detector may alternatively comprise a coil arranged such that, in use, at least a portion of a container received on the support is received within the coil.
  • the inductance of the detector coil then varies dependent upon the level of ingredient in a container received on the support .
  • the inductance of the detector coil may be measured by any suitable electric circuit.
  • the detection circuit may be predominantly mounted to the supporting structure, but may have one or more of its electrical components mounted to the container.
  • the container, or a dispenser unit attached to the container may have capacitor plates fixed thereto at appropriate locations, or may have a coil wound about a part of its structure.
  • the component or components mounted on the container or dispenser unit attached thereto may be connected to the remainder of an electrical detection circuit by means of contacts positioned on or in the support to engage and electrically connect to the container components .
  • the detector may alternatively comprise a source of electro-magnetic radiation, preferably light, and a corresponding detector arranged to receive radiation emitted from the source transmitted through the interior of a container which is received on the support, and through the contents of the container, if present.
  • the container may be transparent to the radiation, or may have windows to permit the light to enter and leave the container.
  • the detector may be arranged with the source on one side of a received container and the corresponding detector on the opposite side.
  • the quantity of radiation received by the detector would then depend upon whether or not ingredient was at a sufficient level in the container to impede or interfere with radiation emitted from the source.
  • the detector is preferably arranged to detect the presence of ingredient at a lower portion of a received container at a level at which sufficient ingredient is present to provide at least one drink.
  • a drink dispenser comprises a diluent supply means; a support for receiving at least partially a container for holding concentrate for a drink to be dispensed by the drink dispenser; means arranged, in use, to activate the supply of concentrate from a received container to be mixed with diluent from the diluent supply means when a drink is selected; a detector for detecting whether a received container has sufficient concentrate to make a drink and means for providing an electrical signal indicating whether the container has sufficient concentrate to make a drink.
  • Figure 1 diagramrnatically represents a drink dispenser in which the invention is embodied
  • Figure 2 shows a concentrate supply arrangement comprising a bottle, shown partly in section, containing liquid concentrate for a drink and a concentrate dispensing unit;
  • Figure 3 shows a concentrate dispensing unit received in a support according to a preferred embodiment of the invention shown in section;
  • Figure 4 is a perspective view of the support cut away at the line IV-IV shown in Figure 3;
  • FIGS 5 and 6 show an electrical circuit used in the preferred embodiment of the invention
  • Figure 7 is a graph showing voltages at various points in the electrical circuit of Figures 5 and 6 when in use;
  • Figure 8 is a view similar to Figure 2, showing a concentrate supply arrangement including a detector circuit component;
  • Figure 9 is a view similar to Figure 3, showing the concentrate supply arrangement of Figure 8 in a support.
  • Figure 10 is a view similar to Figure 4 taken in line X X of Figure 9 , showing one of the electrical contacts of the support.
  • the drink dispenser comprises a carbonation chamber 1 to which is connected a diluent supply means 2, which in this embodiment is for supplying water to be carbonated.
  • a carbon dioxide supply means 3 is connected to the chamber 1 by a conduit 4 for supplying carbon dioxide thereto.
  • Carbonated water is supplied from the carbonation chamber 1 to a discharge arrangement 5 of a concentrate supply arrangement 6 by one or more conduits 7.
  • Carbonated water and concentrate are discharged into a vessel such as a cup or glass 8 to form a flavoured carbonated drink when the dispensing device is in use.
  • the carbonation chamber 1 contains a carbonating device which may be of conventional form e.g. a nozzle for injecting carbon dioxide into the water, but is preferably as described in our published British Patent application No. 2161089 (and EP-A-166586 ) .
  • the water supply arrangement and carbon dioxide supply means may also be as described in that published British Patent application .
  • the present invention may alternatively be embodied in a drink dispenser for use with non-carbonated water simply by omitting the carbonation chamber 1 and the carbon dioxide supply means 3.
  • the operation of a carbonation chamber may be controlled to provide carbonated or non-carbonated water at its outlet, dependant on whether the user selects a carbonated or non-carbonated drink .
  • the concentrate supply arrangement 6 comprises a container 11 preferably made from moulded plastics material for storing concentrate, and a concentrate dispensing unit 12 which is secured to the container 11, and is for dispensing concentrate therefrom in metered quantities.
  • the concentrate dispensing unit 12 is preferably as described in our published European Patent application No. 0478624.
  • the container 11 is filled with liquid concentrate 13 to be mixed with water to provide a flavoured drink.
  • the liquid concentrate dispensing unit 12 is sealed to the container .1 I during production by push fitting a resilient annular collar 14 of the concentrate dispensing unit 12 over a corresponding outwardly directed annular flange on the neck 15 of the container 11.
  • the resilient annular collar 14 of the concentrate dispensing unit 12 is supported by a coaxial annular base 16 which on the side remote from the collar 14 carries a coaxial side wall 17 which has a downwardly tapering frusto-conical upper portion closest to the base 16 and a cylindrical lower portion furthest from the base 16 (as seen in Figure 2).
  • the cylindrical portion of the side wall 17 carries two parallel outwardly directed annular flanges 18 on its circumference which are spaced in the direction of an axis passing through the centre of the side wall 17 and extend radially by equal amounts from the cylindrical surface of the side wall 17.
  • the side wall 17 has a series of holes 19, one of which is shown in Figure 2, spaced around its circumference between the flanges 18. Metered quantities of concentrate are dispensed from nozzle 20 of the concentrate dispensing unit 12 by permitting fluid pressure to enter the dispensing unit 12 through holes 19 as described in EP-A- 0478624.
  • FIG 3 shows a concentrate dispensing unit 12 received in a support 30.
  • the annular flanges 18 are formed of resilient material such as soft plastics material e.g. low density polyethylene which forms a seal with the support 30, and which form a sealed annular chamber 31 around the holes 19 when the concentrate dispensing unit 12 is received in the support 30.
  • a conduit 32 formed in the support 30 communicates with the annular chamber 31.
  • Fluid pressure to operate the concentrate dispensing unit 12 as described in EP-A-0478624 is supplied through the conduit 32, preferably as a pressurised gas.
  • water is supplied through conduit 33 to be mixed with the dispensed concentrate to supply a flavoured drink through outer nozzle 34.
  • the support 30 also has a detector comprising two capacitive plates 35, 36 preferably made from metal, with one arranged on each side of a concentrate dispensing unit 12 when it is received in the support 30.
  • Each capacitive plate 35, 36 is connected to a part of an electric circuit used to determine the capacitance of the detector by a screened lead 37, 38.
  • the concentrate in a received concentrate dispensing unit 12 acts as a dielectric between the two capacitive plates 35, 36 so that the capacitance of the detector varies dependent upon the level of concentrate in the concentrate dispensing unit 12.
  • the electrical circuit connected to the capacitive plates 35, 36 is arranged to provide an electrical signal indicating that the container does not have sufficient concentrate to make a drink.
  • the capacitive plates 35, 36 are preferably as close to the top of the concentrate dispensing unit 12 as possible as the greatest signal level discrimination occurs at the level of the capacitive plates 35, 36 and the entire contents of the unit 12 is normally used to make one drink.
  • the capacitive plates 35, 36 are shown in Figure 3 at the level of about 80% of the concentrate dispensing unit maximum fill level due to constructional considerations.
  • a drink dispenser incorporating the detector can then be arranged not to accept payment for drinks, or if the dispenser can dispense a variety of drinks, to indicate that that particular drink is not available when the level of concentrate falls below the predetermined minimum level .
  • the capacitive plates 35, 36 are preferably positioned on the inner wall 40 of the support 30 to be as close to a received concentrate dispensing unit 12 as is practical and are preferably diametrically opposed as shown in Figure 4 to obtain the strongest readings .
  • the capacitive plates 35, 36 shown in Figure 4 follow the profile of the received concentrate dispensing unit 12 and each have a length of 25% of the circumference of the unit 12. In the illustrated embodiment, the length of each plate is 35mm and the width 5mm.
  • Figures 5 and 6 show a preferred embodiment of an electrical circuit to determine the capacitance of the detector.
  • a first capacitive plate 35 shown in Figure 5 is driven by an electrical signal oscillating at high frequency and a second capacitive plate 36 is used as a detector to measure the amplitude of the signal received from the first capacitive plate 35.
  • the capacitive plate 35 is driven by an oscillator 50 configured to supply a 50kHz square wave output signal.
  • the precise frequency and wave form is not critical to the operation of the detector and may be any frequency above 10kHz. At lower frequencies signal coupling between the capacitive plates starts to reduce, while for frequencies above 100kHz electro-magnetic emissions may interfere with other equipment.
  • Each of the leads 37, 38 connected to the capacitive plates 35, 36 are screened to reduce the pick up of external interference. Each screen is made off adjacent to its respective capacitive plate 35, 36 and connected to an earth.
  • the oscillating signal received on second capacitive plate 36 is transmitted through screened lead 38 and amplified by a pre-ampli bomb 51 shown in Figure 6, rectified by rectifier 52 to provide a d.c.
  • offset amplifier 53 offset and further amplified by offset amplifier 53, with both amplifiers being supplied with a re erence voltage from circuit 54.
  • the output from offset amplifier 53 is then passed to a comparator 55 which determines whether the d.c. voltage signal is greater or less than a reference voltage.
  • the output of the comparator switches a transistor 56 to indicate whether or not the concentrate dispensing unit 12 received in the support 30 between the capacitive plates 35, 36 has sufficient concentrate to dispense a flavoured drink.
  • Pre-amplifier 51 has a gain of 100 and produces an output signal at the oscillator frequency from the signal detected at second capacitive plate 36. With no concentrate in the part of the concentrate dispensing unit 12 received between the capacitive plates 35, 36 the output signal of pre-amplifier 51 is 2.0V peak to peak and increases to 4.9V peak to peak for a full concentrate dispensing unit 12. Measurement results for different levels of the liquid in the concentrate dispensing unit 12 are as shown in the graph of Figure 7.
  • the rectifier 52 comprises capacitor C2, diode Dl , diode D2 and capacitor C3.
  • the rectifier 52 level shifts and rectifies the output of pre-amplifier 51 to give a d.c. voltage.
  • the output of rectifier 52 is 1.3V for an empty concentrate dispensing unit 12 and 3.6V for a full concentrate dispensing unit 12 as also shown in Figure 7.
  • Offset amplifier 53 level shifts and amplifies the output of rectifier 52.
  • the output voltage levels of offset amplifier 53 are also shown in Figure 7.
  • the output of offset amplifier 53 is connected to the input of comparator 55 which in this embodiment has a switching point set at 8V as shown by a broken line in the graph of Figure 7 intersecting the output voltage of the offset amplifier 53.
  • the output from the comparator 55 is used to switch an open collector transistor 56 switchable between two positions to indicate whether or not the concentrate dispensing unit has the desired level of concentrate required to prepare at least one flavoured drink .
  • the capacitor plates 35, 36 used to produce the results shown in Figure 7 were positioned at approximately 50% of the maximum fill level of the concentrate dispensing unit 12 for mechanical convenience in the prototype. Consequently the greatest change in output voltage for a given change in concentrate volume of the concentrate dispensing unit 12 or signal discrimination is achieved near the 50% fill level of the unit 12. For greater signal discrimination nearer the normal maximum fill level of the unit 12, the capacitive plates would be positioned nearer the top of the concentrate dispensing unit 12.
  • Figures 8 to 10 illustrate a further embodiment of the invention in views similar to Figures 2 to 4. Like reference numbers are used to designate corresponding parts .
  • capacitor plates 35, 36 are attached to the conical part 17 of the dispensing unit 12.
  • the capacitor plates may for example be formed from self-adhesive metal foil.
  • a locating lug 45 extends outwardly from the conical surface 17 adjacent its junction with cylindrical base 16.
  • the support 30 illustrated in Figures 9 and 10 includes a locating recess 46 into which the locating lug 45 is received when the concentrate dispensing unit 6 is placed in the support 30, to ensure correct angular alignment between the support 30 and the unit 6 about a vertical axis .
  • a pair of contact elements 47 (only one shown) which make electrical contact with respective capacitor plates 35, 36 mounted on the dispensing unit 6'. Leads 37 and 38 connect the contacts 47 to the remainder of the detector circuit.
  • the detection circuit is completed by the electrical contact between the capacitive plates 35, 36 and the contact elements 47, and the circuit functions in the manner described in relation to Figures 1 to 7. It will be appreciated that the locating lug 45 and its corresponding recess 46 may be replaced by visual alignment marks on the support 30 and the unit 6, or may be unnecessary if the structure of the unit 6 is such as only to be receivable in the support 30 in a limited range of angular orientations .
  • a first plurality of circumferentially spaced contacts 47 connected to one of the leads 37 may be provided at a first axial position
  • a second plurality of circumferentially spaced contacts 47 connected to a second lead 38 may be provided at a second axial position so that a first capacitor plate engages at least one of the contacts 47 of the first array, and the second capacitor plate engages at least one of the contacts of the second array.
  • the installation of the unit 6 in the support 30 may be made independent of angular orientation, since the axial spacing of the contacts ensures that each array is specific to one of the plates.
  • a pair of circumferentially extending and axially spaced contact rings may be provided on the unit 6 , with the capacitor plates or an induction coil mounted therebetween. Respective plates, or respective ends of the coil, would be connected to respective contact rings, and axially spaced contact elements 47 in the support would each connect one of the rings to a respective lead.
  • the angular orientation of the unit 6 in the support 30 would thus be immaterial, since a contact element 47 would contact its respective ring in all relative angular orientations of the unit 6 and support 30.
  • the detector need not comprise capacitive plates but may, for example, be a coil or comprise means for optically detecting whether a container has sufficient ingredient to supply at least one flavoured drink.
  • the detector could comprise a light source arranged to direct light onto a photodetector such as a photodiode or phototransistor when the concentrate level of a received container falls below a predetermined level at which a flavoured drink can no longer be dispensed but in which the concentrate prevents light or reduces the amount of light reaching the photodiode when it is above the predetermined level, or vice versa.
  • the output of the photodiode could be used to provide an electrical signal, possibly via a comparator with a reference voltage applied to its other input, to indicate whether or not the received container has sufficient concentrate to make a drink.
  • a light source can be arranged to direct light onto a surface of the concentrate in a received container such that when the concentrate has fallen to a predetermined level at which a flavoured drink can no longer be dispensed, the light is either reflected at the liquid surface to impinge on a detector such as a photodiode, or reflection no longer takes place and the light no longer strikes the detector.
  • the photodiode may be connected to a latch, triggered by the signal from the photodiode, to provide an electrical signal indicating that there is no longer sufficient concentrate to dispense a flavoured drink. Manual or automatic means may be provided to reset the latch when the concentrate supply is replenished.
  • a source of sound or ultrasound may be used to direct sound waves through the container to a detecting microphone or sensor, and variation in the detected sounds used to indicate the presence or absence of concentrate. If the sensor is placed so as to be below the concentrate surface when the amount of concentrate remaining is sufficient, and above the concentrate surface when the amount of remaining concentrate is insufficient, then the difference in sensed sound can be used to determine whether a flavoured drink can still be dispensed.
  • the remaining concentrate may be used to conduct sound from the source to the detector by placing both below the concentrate surface, or the concentrate may be used to mask the detector from sound by placing the detector below and the source above the surface .
  • the source and detector for light or sound may be mounted either in the support, or directly to the concentrate container with electrical contacts in the support and on the container providing power supply and sensing output lines to and from the source and sensor.
  • the electrical circuit may comprise any system able to differentiate between the appropriate output signal levels of the detector. For example, if the capacitive detector is used it could form part of an oscillator which could switch between an oscillating state and a non-oscillating state dependent upon the capacitance of the detector.
  • the capacitance of the detector at which the oscillator switches from the non- oscillating state to the oscillating state could be set to correspond to the volume of concentrate required to produce at least one flavoured drink.
  • the frequency of oscillation may be arranged to vary with the volume of concentrate present, and by comparing the oscillating frequency with a reference frequency, a determination of the amount of concentrate can be made.
  • the electrical circuit could also include a reference capacitor designed to have the same capacitance as the capacitive detector when no object is close to the sensing electrodes, to compensate for noise pick-up.
  • the dispensing apparatus could be used with powdered concentrate.
  • the concentrate dispensing unit could then comprise a hopper arranged to dispense predetermined volumes of powdered concentrate.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Devices For Dispensing Beverages (AREA)

Abstract

Appareil permettant de déterminer si un distributeur de boissons qui distribue des boissons contenant un concentré et un diluant est capable de distribuer correctement une boisson particulière. Ledit appareil comporte un détecteur destiné à détecter si un récipient contenant le concentré contient plus d'une quantité minimale prédéterminée de concentré.
PCT/GB1999/001889 1998-06-17 1999-06-15 Distributeur de boissons, detecteur de concentre et recipient contenant du concentre WO1999065818A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU42839/99A AU4283999A (en) 1998-06-17 1999-06-15 Drink dispenser, concentrate detector, and concentrate container

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9813121A GB2338558A (en) 1998-06-17 1998-06-17 Drink dispenser, concentrate detector and concentrate container
GB9813121.2 1998-06-17

Publications (1)

Publication Number Publication Date
WO1999065818A1 true WO1999065818A1 (fr) 1999-12-23

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PCT/GB1999/001889 WO1999065818A1 (fr) 1998-06-17 1999-06-15 Distributeur de boissons, detecteur de concentre et recipient contenant du concentre

Country Status (3)

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AU (1) AU4283999A (fr)
GB (1) GB2338558A (fr)
WO (1) WO1999065818A1 (fr)

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DE102014104983A1 (de) * 2014-04-08 2015-10-08 Marco Systemanalyse Und Entwicklung Gmbh Füllstandsensor
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