WO1996029576A1 - Dispenser - Google Patents
Dispenser Download PDFInfo
- Publication number
- WO1996029576A1 WO1996029576A1 PCT/AU1996/000154 AU9600154W WO9629576A1 WO 1996029576 A1 WO1996029576 A1 WO 1996029576A1 AU 9600154 W AU9600154 W AU 9600154W WO 9629576 A1 WO9629576 A1 WO 9629576A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fluid
- cylinder
- piston
- outlet
- stroke
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F3/00—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
- G01F3/02—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement
- G01F3/04—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls
- G01F3/14—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls comprising reciprocating pistons, e.g. reciprocating in a rotating body
- G01F3/16—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls comprising reciprocating pistons, e.g. reciprocating in a rotating body in stationary cylinders
- G01F3/18—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls comprising reciprocating pistons, e.g. reciprocating in a rotating body in stationary cylinders involving two or more cylinders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/02—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement
- G01F11/04—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement of the free-piston type
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F3/00—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
- G01F3/02—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement
- G01F3/04—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls
- G01F3/14—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls comprising reciprocating pistons, e.g. reciprocating in a rotating body
- G01F3/16—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls comprising reciprocating pistons, e.g. reciprocating in a rotating body in stationary cylinders
Definitions
- This invention relates to dispensers f r metering discrete quantities of fluids and in one aspect relates particularly but not exclusively to dispenser arrangements for metering beverages.
- liquid product from a large product reservoir is fed through a pipe under pressure to a measuring chamber provided with a piston.
- the stroke of the piston is set so that when it is activated by an operator pressing a switch associated with a dispenser, the piston moves a predetermined distance through the chamber and hence pushes a metered amount of product through a pipe to the dispensing outlet.
- the piston After the product has been dispensed in this manner, the piston returns to its initial position whilst at the same lime replacement product under pressure is fed to the piston chamber.
- the main disadvantage of this construction is thai there is a time delay during which the piston chamber is refilled when the dispenser cannot be used. Again, such a delay is not acceptable in situations where high demands for efficiency are placed on staff serving beverages.
- the invention provides a dispenser including: a cylinder: a piston reciprocable within the cylinder; inlet means to the cylinder; and outlet means from the cylinder, the arrangement being such that the piston in its reciprocable movement within the cylinder pushes metered amounts of liquid from the cylinder through the outlet means on each stroke of the piston.
- the invention provides a method of metering fluid from a source including the steps of: supplying fluid from the source to a cylinder having a reciprocating piston; moving the piston a metered distance in the cylinder; and forcing metered amounts of fluid from the cylinder in response to each stroke of the reciprocating piston.
- the fluid is supplied under pressure to the cylinder and the piston moves in response to pressure from the fluid.
- the cylinder may include three sections, namely a stroke portion defined by the stroke of the reciprocating piston, a front chamber beyond the most forward reach of the piston stroke and a rear chamber beyond the most rearward reach of the piston stroke. Stop means may be provided at each end of the piston stroke to limit the piston travel within the cylinder and to improve the accuracy of metering of the dispenser.
- the stop means may comprise front and rear abutments provided in the cylinder at each end of the piston stroke.
- the inlet means may be in communication with the cylinder.
- the inlet means may be arranged to supply fluid into each end of the cylinder.
- Preferably the inlet means is arranged to supply fluid into each end of the cylinder in front of and behind the opposite ends of the piston stroke.
- the outlet means may be in communication with the cylinder.
- the outlet means may be arranged facilitate passage of fluid from each end of the cylinder.
- Preferably the outlet means is arranged to discharge fluid from each end of the cylinder in front of and behind the opposite ends of the piston stroke.
- the inlet and outlet means arc in communication with each of the front chamber and rear chamber.
- the inlet means may comprise one or more ducts or ports extending from an inlet manifold and communicating with both the front and rear chambers.
- the outlet means may comprise one or more ducts or ports extending from an outlet manifold into communication with both the front and rear chambers.
- Fluid supply means may be provided in communication with the inlet means most suitably by way of the inlet manifold.
- the fluid supply means includes pressure means for maintaining fluid supplied to the cylinder under pressure.
- the pressure means may provide sufficient pressure to move the piston along the full length of the piston stroke when the dispenser is actuated.
- the pressure means will maintain pressure in excess of 50 kpa in the cylinder during the piston stroke. More preferably the pressure means will maintain fluid pressure in the dispenser in the range 100 kpa to 750 kpa most suitably 200 kpa to 500 kpa.
- the pressure means may be arranged to push fluid from a product supply reservoir into the dispenser.
- the pressure means may comprise a gas cylinder for providing gas under pressure to the product supply reservoir.
- the inlet means suitably includes inlet valves for controlling the supply of fluid to the cylinder to the rear and front of the piston.
- the inlet means includes a front inlet valve for controlling supply of fluid under pressure to the front chamber and a rear inlet valve for controlling supply of fluid to the rear chamber.
- the outlet means suitably includes outlet valves for controlling the flow of fluid from the cylinder from the rear and front of the piston.
- the outlet means includes a front outlet valve for controlling the discharge of metered fluid from the front chamber and a rear inlet valve for controlling discharge of metered fluid from the rear chamber.
- the dispenser includes two inlet and two outlet valves which are preferably solenoid valves.
- the outlet manifold may be connected to a dispensing outlet for dispensing fluid in metered quantities.
- the dispenser may include a dispensing outlet.
- the dispensing outlet may include a switch for opening the inlet and outlet valves in a sequence which results in a metered amount of fluid being dispensed through the dispensing outlet.
- the piston is provided with one or more o-ring seals most preferably two o-ring seals.
- Sensing means may be provided to sense the position of the piston in the cylinder. Most preferably the sensing means sense the presence of the piston when it is at either end of its stroke.
- the sensing means are located externally of the cylinder.
- the sensing means may be adapted to initiate closure of the inlet and outlet valves in response to the piston reaching the end of its stroke.
- the sensing means may control the valves through a controller.
- the controller may act immediately or may delay operation of the inlet and outlet valves for a predetermined period after the piston has completed its stroke. Preferably the delay is in excess of 0.1 seconds, more preferably 0.25 seconds.
- the sensing means may be in the form of one or more proximity switches.
- each proximity switch being located at a position corresponding to the limits of the stroke of the piston.
- the sensing means may sense the piston position magnetically, photoelectrically, capacitively or electronically.
- the proximity switches may be moveably mounted on a support assembly provided on the exterior of the cylinder.
- the support assembly includes one rail more preferably two rails running parallel to the length of the cylinder.
- the dispenser may include safely cut off means to sense the pressure of fluid in the dispenser, the safety cut off means being operalivcly connected to shut down the dispenser if the pressure of fluid in the dispenser falls below a predetermined value.
- the predetermined value below which ihe dispenser will shut down is 50 kpa.
- the invention provides a dispensing array for dispensing a plurality of fluids which includes a plurality of dispensers as hereinbefore defined.
- each of the dispensers in the dispensing array may most suitably be controlled though a common electronic controller.
- the controller includes means to record the amount of fluid dispensed through each dispenser.
- the controller may also include means to record the number of nips of fluid dispensed from each and/or all of the dispensers.
- the controller may be interfaced with electronic cash registers to record the monetary value of fluid dispensed by each dispenser in the dispensing array.
- the controller may include means to determine the amount of fluid remaining in each fluid reservoir and to initiate a product ordering procedure when the product in a fluid reservoir falls below a predetermined value.
- the controller may be interfaced with a modem to electronically order replacement product lrom suppliers as and when necessary.
- the controller may include means to predict high volume usage times and to adjust the product threshold at which new product is ordered.
- the controller may be accessed via a modem from an external source to provide data to authorised users.
- the controller may be interfaced with other computer controlled hardware to assist control and data exchange in one or both directions.
- the controller may include means to generate a periodic report.
- the report may include graphs and/or any form of data gathered by the controller.
- the dispensing array may have electronic tagging facilities to associate drink orders with separate bar staff.
- the controller may have a link with other electronic devices such as separate portable small hand held type mini computers.
- Such electronic devices may be used to record and accept orders for drinks from patrons noting drink(s) type, size, payment method and location (table or poker machine number) and to relay the signal to the bar for a tender to fill appropriate glasses with requested drinks.
- the same or other floor staff can distribute drinks to patrons.
- Automated glass dispensing and filling means can be incorporated in the dispensing array responsive to signals from such electronic devices.
- the dispensing array may accept new stock details from a bar code format.
- Figure 1 shows an clevational view of a dispenser constructed in accordance with the invention
- Figure 2 shows a plan view of the dispenser shown in Figure 1 rotated 180°C; and Figure 3 shows a block diagram of a multiple dispenser array in accordance with the invention.
- the dispenser 1 includes a body portion 2.
- the body portion may be formed of any suitable material such as plastics or non-reactive metal such as stainless steal. However plastics is the most preferred material. Where large numbers of dispensers are required it is anticipated that the various elements of the body will be produced by injection moulding plastics. However, if only small numbers of dispensers are required, the outer housing portions may comprise acrylic blocks whereas the cylinder portions of the dispensers are most suitably formed from an ultra high molecular weight polyethylene material.
- the dispenser includes a cylinder 3 having a front chamber 4 and a rear 5.
- Abutments 6 and 7 are provided in the front and rear of the cylinder to limit the travel of the piston 8 within the cylinder.
- An effective sealing effect between the piston and the wall of the cylinder may be achieved by providing the piston with two o-ring seals 9 and 10.
- the dispenser is provided with an inlet 20 through which fluid may be supplied to the dispenser.
- the inlet 20 communicates with an inlet manifold which is arranged to supply fluid to the two rear inlet ducts 22 and 23.
- a rear inlet valve 24 which will most suitably be an electrically actuated solenoid valve includes a valve chamber 25 through which fluid flows to the rear inlet port 26 when the valve is open.
- front inlet ducts 27 and 28 communicate with the inlet manifold 21 and supply fluid to the front inlet port 29 when the front inlet valve 30 is open.
- the dispenser includes an outlet 41 connected with the outlet manifold 42 which in turn is in communication with the rear outlet duct 43.
- the rear outlet duct 43 supplies fluid to the rear outlet ports 44 and 45 control of the flow of fluid between the outlet duct and outlet ports being effected by the rear outlet valve 48 opening and closing communication by way of the valve chamber 49 joining the outlet ports and duct.
- a front outlet duct supplies fluid to the front outlet ports 51 and 52 the supply of fluid being controlled by the front outlet valve 53 opening and closing communication between the outlet ports and duct through the valve chamber 54.
- Means for sensing the piston at the end of each stroke take the form of rear and front proximity switches 60 and 61 respectively which are mounted on the dispenser with their front faces 62 close to or abutting the outer cylinder wall 63.
- the mounting of the proximity switches is by way of a mounting assembly in the form of a mounting rail 64 comprising two parallel rails joined by a "C" shaped section to give the overall configuration of a deep "U” .
- front and rear proximity switches are located so that they will be immediately above the piston 8 when it reaches either end of its stroke.
- the length of stroke of the piston can be varied and hence the amount of fluid dispensed by the dispenser in each piston stroke.
- a dispensing array generally designated 69 which includes a plurality of product reservoirs 70 in the form of sealed cylinders containing different fluid products which can be maintained under pressure.
- Means for supplying pressure to the product reservoirs take the form of a gas cylinder 71 ior supplying gas under pressure. Whilst the apparatus shows the use of a gas cylinder, it is to be understood that any other appropriate gas generation device such as a pump could also be used .
- Gas lines 72 connect the gas cylinder 71 and the product reservoir 70 in order that they may all be maintained al substantially the same pressure. Fluid product from each of the product reservoirs is delivered to corresponding dispensers 1 by way of a series of supply lines 73.
- Discharge lines connect the dispensers to individual dispensing outlets 76 mounted in the rack 75.
- the rack is constructed in such a way that the dispensing outlets 76 may dispense metered amounts of a chosen fluid into a receptacle 77 as and when required at the activation of a switch associated with the dispensing outlet or the rack.
- Control of the operations of the dispensing array is achieved by means of a controller 82 connecting various controllable elements of the dispensing array via the control lines 78 to 81.
- control lines may be connected to fluid pressure sensing means which may be provided in a range of locations in the dispensing array.
- pressure sensing means may be provided in the gas cylinder 71 , product reservoirs 70, dispensers 1 and any of the supply or discharged lines 73 and 74.
- control lines 79 may be connected to a plurality of switches provided on the rack 75 or in association with the dispensing outlets 76. the switches being arranged to activate a dispensing sequence which results in a metered amount of fluid being dispensed from a chosen dispensing outlet.
- the control lines 80 are connected to the rear and front proximity switches on the various dispensers.
- the controller receives signals from the proximity switches indicating that the piston has reached the end of each stroke.
- Control lines 81 are associated with each of the dispensers 1 to control operation of the four solenoid valves included in each of the dispensers.
- fluid is supplied under pressure from the product reservoirs 70 to each of the dispensers 1 via the supply lines 73.
- the pressure used is generally expected to fall between 100 and 750 kpa. the most preferred range being 200 to 500 kpa.
- the controller 82 When an operator activates a switch associated with a particular dispensing outlet 76. the controller 82, via the control lines 81 opens appropriate inlet and outlet valves in the respective dispenser 1. the valves concerned being dependent on the position of the piston 8 at the commencement of the cycle.
- ihc front proximity switch 61 senses the presence of the piston and sends a signal to the controller 72 which after a delay of about VA of a second closes the rear inlet valve 24 and front outlet valve 53 through the control lines 81 to complete the dispensing cycle. Should the pressure in the dispensing array ever go below a predetermined minimum, pressure sensors connected to the control lines 78 signal the dropping pressure to the controller 82 which then closes down the dispenser array by closing all the inlet and outlet valves.
- the cylinder remains filled with fluid during the entire cycle as fluid enters the cylinder to push the piston forward at the same rate as it exits the cylinder to be dispensed.
- the dispenser is ready to go into the next cycle without the need to refill the dispenser as refilling has occurred during dispensing in the previous cycle.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Devices For Dispensing Beverages (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9624416A GB2302320B (en) | 1995-03-20 | 1996-03-20 | Dispenser |
AU49329/96A AU4932996A (en) | 1995-03-20 | 1996-03-20 | Dispenser |
DE19680330T DE19680330T1 (en) | 1995-03-20 | 1996-03-20 | Output device |
HK98108932A HK1008149A1 (en) | 1995-03-20 | 1998-07-07 | Dispenser |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPN1829 | 1995-03-20 | ||
AUPN1829A AUPN182995A0 (en) | 1995-03-20 | 1995-03-20 | Dispenser |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996029576A1 true WO1996029576A1 (en) | 1996-09-26 |
Family
ID=3786185
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU1996/000154 WO1996029576A1 (en) | 1995-03-20 | 1996-03-20 | Dispenser |
Country Status (5)
Country | Link |
---|---|
AU (1) | AUPN182995A0 (en) |
DE (1) | DE19680330T1 (en) |
GB (1) | GB2302320B (en) |
HK (1) | HK1008149A1 (en) |
WO (1) | WO1996029576A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1004857A1 (en) * | 1998-10-28 | 2000-05-31 | The Lubrizol Corporation | Apparatus, system and method for additizing a liquid product |
GB2354528A (en) * | 1999-09-25 | 2001-03-28 | Trikon Holdings Ltd | Liquid precursor delivery apparatus |
US6653247B2 (en) | 1999-02-26 | 2003-11-25 | Trikon Holdings Limited | Dielectric layer for a semiconductor device and method of producing the same |
WO2004078636A1 (en) * | 2003-03-03 | 2004-09-16 | Peter Camitz Ab | Producing and dispensing of liquor |
US7309662B1 (en) | 1999-06-26 | 2007-12-18 | Aviza Europe Limited | Method and apparatus for forming a film on a substrate |
CN101900148A (en) * | 2010-07-12 | 2010-12-01 | 无锡市长江液压缸厂 | Short-stroke pressure-maintaining high-pressure heavy hydraulic cylinder with high-pressure proximity switches |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB901850A (en) * | 1960-01-26 | 1962-07-25 | Gaskell & Chambers Ltd | Improvements in or relating to liquid dispensing apparatus |
US3292824A (en) * | 1965-03-19 | 1966-12-20 | Leon J Arp | Fluid metering and delivering device |
US3344667A (en) * | 1964-10-09 | 1967-10-03 | Gen Motors Corp | Flow monitor |
GB1307521A (en) * | 1969-01-21 | 1973-02-21 | Priestly T P | Apparatus for dispensing liquid in measured quantities |
GB1350345A (en) * | 1971-06-23 | 1974-04-18 | Dart Ind Inc | Method and apparatus for measuring the flow rate of a liquid |
GB1432741A (en) * | 1973-02-19 | 1976-04-22 | Alfa Laval Ab | Metering apparatus |
DE2722441A1 (en) * | 1977-05-18 | 1978-11-30 | Kernforschungsz Karlsruhe | Flowmeter for IC engines fuel consumption - has piston moving in calibrated cylinder, with movement converted into fuel feed |
EP0443276A1 (en) * | 1990-02-19 | 1991-08-28 | Nordson Corporation | Apparatus for intermittent application of adhesive flowable material |
-
1995
- 1995-03-20 AU AUPN1829A patent/AUPN182995A0/en not_active Abandoned
-
1996
- 1996-03-20 WO PCT/AU1996/000154 patent/WO1996029576A1/en active Application Filing
- 1996-03-20 DE DE19680330T patent/DE19680330T1/en not_active Withdrawn
- 1996-03-20 GB GB9624416A patent/GB2302320B/en not_active Expired - Fee Related
-
1998
- 1998-07-07 HK HK98108932A patent/HK1008149A1/en not_active IP Right Cessation
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB901850A (en) * | 1960-01-26 | 1962-07-25 | Gaskell & Chambers Ltd | Improvements in or relating to liquid dispensing apparatus |
US3344667A (en) * | 1964-10-09 | 1967-10-03 | Gen Motors Corp | Flow monitor |
US3292824A (en) * | 1965-03-19 | 1966-12-20 | Leon J Arp | Fluid metering and delivering device |
GB1307521A (en) * | 1969-01-21 | 1973-02-21 | Priestly T P | Apparatus for dispensing liquid in measured quantities |
GB1350345A (en) * | 1971-06-23 | 1974-04-18 | Dart Ind Inc | Method and apparatus for measuring the flow rate of a liquid |
GB1432741A (en) * | 1973-02-19 | 1976-04-22 | Alfa Laval Ab | Metering apparatus |
DE2722441A1 (en) * | 1977-05-18 | 1978-11-30 | Kernforschungsz Karlsruhe | Flowmeter for IC engines fuel consumption - has piston moving in calibrated cylinder, with movement converted into fuel feed |
EP0443276A1 (en) * | 1990-02-19 | 1991-08-28 | Nordson Corporation | Apparatus for intermittent application of adhesive flowable material |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1004857A1 (en) * | 1998-10-28 | 2000-05-31 | The Lubrizol Corporation | Apparatus, system and method for additizing a liquid product |
US6653247B2 (en) | 1999-02-26 | 2003-11-25 | Trikon Holdings Limited | Dielectric layer for a semiconductor device and method of producing the same |
US6846757B2 (en) | 1999-02-26 | 2005-01-25 | Trikon Holdings Limited | Dielectric layer for a semiconductor device and method of producing the same |
US7309662B1 (en) | 1999-06-26 | 2007-12-18 | Aviza Europe Limited | Method and apparatus for forming a film on a substrate |
GB2354528A (en) * | 1999-09-25 | 2001-03-28 | Trikon Holdings Ltd | Liquid precursor delivery apparatus |
US6640840B1 (en) | 1999-09-25 | 2003-11-04 | Trikon Holdings Limited | Delivery of liquid precursors to semiconductor processing reactors |
GB2354528B (en) * | 1999-09-25 | 2004-03-10 | Trikon Holdings Ltd | Delivery of liquid precursors to semiconductor processing reactors |
WO2004078636A1 (en) * | 2003-03-03 | 2004-09-16 | Peter Camitz Ab | Producing and dispensing of liquor |
CN101900148A (en) * | 2010-07-12 | 2010-12-01 | 无锡市长江液压缸厂 | Short-stroke pressure-maintaining high-pressure heavy hydraulic cylinder with high-pressure proximity switches |
Also Published As
Publication number | Publication date |
---|---|
GB2302320B (en) | 1998-02-11 |
GB2302320A (en) | 1997-01-15 |
DE19680330T1 (en) | 1997-10-02 |
GB9624416D0 (en) | 1997-01-08 |
AUPN182995A0 (en) | 1995-04-13 |
HK1008149A1 (en) | 1999-04-30 |
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