# US 11,440,786 B2 · Systems and methods for dispensing fluid mixtures > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,440,786 B2 - Document ID: US11440786B2 - Status: Granted - Kind: B2 - Application number: 17/545,433 - Filed: 2021-12-08 - Published: 2022-08-11 - Granted: 2022-09-13 - Earliest claimed: 2021-02-05 - Assignees: Cana Technology, Inc. - Applicants: Cana Technology, Inc. - Inventors: Gregory Allen Springer; Jeffery Lance Kizer; Matthew Ambauen; Stephan Weidi Tai; Erik James Shahoian; David Friedberg; Andrés Ornelas Vargas; Simon Spence; Peter Delmenico; Andrew Christopher Jenkins; Nathan Andrew Ray - Web page: https://patentgrep.com/patent/US11440786B2 ## CPC - B67D 1/0878: {Safety, warning or controlling devices (B67D1/12 takes precedence)} - A47J 31/40: Beverage-making apparatus with dispensing means for adding a measured quantity of ingredients, e.g. coffee, water, sugar, cocoa, milk, tea - A47J 31/407: {with ingredient-containing cartridges; Cartridge-perforating means} - A47J 31/461: {Valves, e.g. drain valves} - A47J 31/5251: {of pressure} - B01F 33/846: {using stored recipes for determining the composition of the mixture to be produced, i.e. for determining the amounts of the basic components to be dispensed from the component receptacles} - B01F 35/1453: {by means of jets of fluid, e.g. air} - B01F 35/2113: {Pressure} - B01F 35/2213: {Pressure} - B01F 35/7174: {using pistons, plungers or syringes} - B01F 35/71745: {using pneumatic pressure, overpressure, gas or air pressure in a closed receptacle or circuit system} - B01F 35/71805: {using valves, gates, orifices or openings} - B01F 35/718051: {being adjustable} - B01F 35/7543: {using pneumatic pressure, overpressure or gas pressure in a closed receptacle or circuit system} - B08B 9/032: by the mechanical action of a moving fluid, e.g. by flushing (B08B9/04 takes precedence {; by fluid jets mounted on cleaning devices B08B9/0433}) - B67D 1/0015: {the beverage being prepared by mixing at least two liquid components} - B67D 1/0019: {based on volumetric dosing} - B67D 1/0035: {the controls being based on the same metering technics} - B67D 1/0036: {based on the timed opening of valves} - B67D 1/0037: {based on volumetric dosing} - B67D 1/0046: {Mixing chambers} - B67D 1/0052: {by means for directing respective streams together} - B67D 1/0078: {Ingredient cartridges} - B67D 1/0079: {having their own dispensing means} - B67D 1/0085: {electro-mechanical} - B67D 1/04: Apparatus utilising compressed air or other gas acting directly or indirectly on beverages in storage containers - B67D 1/07: Cleaning beverage-dispensing apparatus {(B67D1/0834, B67D1/0837 take precedence)} - B67D 1/0884: {Means for controlling the parameters of the state of the liquid to be dispensed, e.g. temperature, pressure} - B67D 1/0885: {Means for dispensing under specific atmospheric conditions, e.g. under inert gas} - B67D 1/0888: {Means comprising electronic circuitry (e.g. control panels, switching or controlling means)} - B67D 1/1252: {Gas pressure control means, e.g. for maintaining proper carbonation (for beer engines B67D1/025)} - B67D 1/14: Reducing valves or control taps - B67D 3/0012: {provided with mixing devices} - B67D 3/0019: {using ingredient cartridges} - B67D 3/0041: {with provisions for metering the liquid to be dispensed} - F16K 37/0041: {for measuring valve parameters (F16K37/0033 takes precedence)} - A23G 9/30: Cleaning; Keeping clean; Sterilisation - B01F 23/483: {using water for diluting a liquid ingredient, obtaining a predetermined concentration or making an aqueous solution of a concentrate} - B01F 2035/351: {Sealings} - B01F 2101/14: Mixing of ingredients for non-alcoholic beverages; Dissolving sugar in water - B01F 2101/16: Mixing wine or other alcoholic beverages; Mixing ingredients thereof - B01F 2101/21: Mixing of ingredients for cosmetic or perfume compositions - B67D 2001/0093: {Valves} - B67D 2001/0098: {using a gas} - B67D 2001/0481: {Single inert gas, e.g. N2} - B67D 2001/075: {Sanitising or sterilising the apparatus} - B67D 2001/0814: {for upside down use} - B67D 2001/082: {arranged in parallel} - B67D 2001/0822: {Pressurised rigid containers, e.g. kegs, figals} - B67D 2210/00013: Sterilising means - B67D 2210/00065: related to the use of drinking cups or glasses - B67D 2210/00089: Remote control means, e.g. by electromagnetic signals - B67D 2210/00091: Bar management means - B67D 2210/00146: Component storage means - B67D: DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR (cleaning pipes or tubes or systems of pipes or tubes B08B9/02; emptying or filling of bottles, jars, cans, casks, barrels, or similar containers, not otherwise provided for B67C; water supply E03; pipe systems F17D; domestic hot-water supply systems F24D; measuring volume, volume flow, mass flow or liquid level, metering by volume G01F; coin-freed or like apparatus G07F) - A47J: KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES - B01F: MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING (mixing paints B44D3/06) - B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - A23G: COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF ## Abstract In some embodiments of a fluid dispensing system: (1) two or more mixing channels are fluidly connected to (a) a mixing chamber fluidly connected to a dispenser, (b) a particular two or more solvent reservoirs, and (c) a respective one or more ingredient reservoirs, wherein each of the ingredient reservoirs is configured to dispense into a respective one of the mixing channels; and (2) a controller is programmed to receive a request for a fluid mixture, and, in response control the system to: mix, in the mixing channels to form an intermediate fluid mixture, a respective predetermined amount of solvent from each of the particular solvent reservoirs and a respective predetermined amount of the ingredients from some of the ingredient reservoirs; flow, to the mixing chamber and then to the dispenser, the intermediate fluid mixture; and dispense the requested fluid mixture (including the intermediate fluid mixture) via the dispenser. ## Claims ### Claim 1 A fluid mixture dispensing system comprising: at least two solvent reservoirs containing respective solvents; a plurality of ingredient reservoirs; two or more mixing channels fluidly connected to the at least two solvent reservoirs and each fluidly connected to at least one of the plurality of ingredient reservoirs; a mixing chamber fluidly connected to the two or more mixing channels; a dispenser fluidly connected to the mixing chamber; and a controller, wherein the controller is programmed to: receive a request for a fluid mixture; and in response to receiving the request for the fluid mixture: flow a predetermined amount of at least two of the respective solvents from the at least two solvent reservoirs and a predetermined amount of at least one ingredient from the plurality of ingredient reservoirs to the two or more mixing channels to form an intermediate fluid mixture; flow the intermediate fluid mixture to the mixing chamber to form the fluid mixture; flow a second predetermined amount of one of the respective solvents from the at least two solvent reservoirs to the mixing chamber to form the fluid mixture; and dispense the fluid mixture from the mixing chamber via the dispenser. ### Claim 2 (depends on 1) The fluid mixture dispensing system of claim 1, wherein the predetermined amount of the at least two of the respective solvents from the at least two solvent reservoirs is combined in a fluid path between the at least two solvent reservoirs and the two or more mixing channels. ### Claim 3 (depends on 2) The fluid mixture dispensing system of claim 2, wherein each of the two or more mixing channels is fluidly connected to a respective one or more of the plurality of ingredient reservoirs; wherein each of the plurality of ingredient reservoirs is configured to dispense into a respective one of the two or more mixing channels; and wherein two or more of the plurality of ingredient reservoirs are configured to dispense into a particular one of the two or more mixing channels. ### Claim 4 (depends on 3) The fluid mixture dispensing system of claim 3, wherein a width of the particular mixing channel is such that at least some of the predetermined amount of the at least two of the respective solvents is able to flow through the particular mixing channel around a non-dispensing one of the two or more of the plurality of ingredient reservoirs. ### Claim 5 (depends on 1) The fluid mixture dispensing system of claim 1, wherein the flow of the predetermined amount of the at least two of the respective solvents from the at least two solvent reservoirs comprises: an initial flow of some of the predetermined amount of the at least two of the respective solvents; a pause in a flow of the at least two of the respective solvents during the flow of the predetermined amount of the at least one ingredient from the plurality of ingredient reservoirs; and a final flow of a remainder of the predetermined amount of the at least two of the respective solvents. ### Claim 6 (depends on 5) The fluid mixture dispensing system of claim 5, wherein the pause in the flow of the at least two of the respective solvents begins before and ends after the flow of the predetermined amount of the at least one ingredient from the plurality of ingredient reservoirs. ### Claim 7 (depends on 5) The fluid mixture dispensing system of claim 5, wherein the pause in the flow of the at least two of the respective solvents is not as long as a duration of the flow of the predetermined amount of the at least one ingredient from the plurality of ingredient reservoirs. ### Claim 8 (depends on 1) The fluid mixture dispensing system of claim 1, wherein the fluid mixture in the mixing chamber is heated or cooled by a heat exchanger. ### Claim 9 (depends on 1) The fluid mixture dispensing system of claim 1, wherein the one of the respective solvents from the at least two solvent reservoirs comprises alcohol. ### Claim 10 (depends on 1) The fluid mixture dispensing system of claim 1, further comprising an ingredient cartridge; and wherein the ingredient cartridge comprises a pressurized chamber, the pressurized chamber containing the plurality of ingredient reservoirs. ### Claim 11 (depends on 10) The fluid mixture dispensing system of claim 10, wherein the controller is further programmed to control pressure of the pressurized chamber so that pressure is applied to the plurality of ingredient reservoirs; and wherein the controller is programmed to flow the predetermined amount of the at least one ingredient from the plurality of ingredient reservoirs by controlling the pressure applied to the plurality of ingredient reservoirs. ### Claim 12 (depends on 11) The fluid mixture dispensing system of claim 11, wherein the predetermined amount of the at least one ingredient from the plurality of ingredient reservoirs is dispensed via at least one valve into the two or more mixing channels. ### Claim 13 (depends on 12) The fluid mixture dispensing system of claim 12, wherein the controller is programmed to flow the predetermined amount of the at least one ingredient from the plurality of ingredient reservoirs by opening the at least one valve for a time period based on at least the pressure applied to the plurality of ingredient reservoirs. ### Claim 14 (depends on 1) The fluid mixture dispensing system of claim 1, wherein the controller is programmed to flow the predetermined amount of the at least two of the respective solvents from the at least two solvent reservoirs and the predetermined amount of the at least one ingredient from the plurality of ingredient reservoirs to the two or more mixing channels according to a formula for the fluid mixture. ### Claim 15 A method used in a fluid mixture dispensing system having (a) at least two solvent reservoirs containing respective solvents; (b) a plurality of ingredient reservoirs; and (c) two or more mixing channels fluidly connected to the at least two solvent reservoirs and each fluidly connected to at least one of the plurality of ingredient reservoirs, the method comprising: receiving a request for a fluid mixture; and in response to receiving the request for the fluid mixture, (a) flowing a predetermined amount of at least two of the respective solvents from the at least two solvent reservoirs and a predetermined amount of at least one ingredient from the plurality of ingredient reservoirs to the two or more mixing channels to form an intermediate fluid mixture; (b) flowing the intermediate fluid mixture to a mixing chamber to form the fluid mixture; (c) flowing a second predetermined amount of one of the respective solvents from the at least two solvent reservoirs to the mixing chamber to form the fluid mixture; and (d) dispensing the fluid mixture from the mixing chamber via a dispenser. ### Claim 16 (depends on 15) The method of claim 15, further comprising, in response to receiving the request for the fluid mixture, combining, in a fluid path between the at least two solvent reservoirs and the two or more mixing channels, the predetermined amount of the at least two of the respective solvents from the at least two solvent reservoirs. ### Claim 17 (depends on 15) The method of claim 15, wherein the flowing the predetermined amount of the at least two of the respective solvents from the at least two solvent reservoirs comprises: (i) initially flowing some of the predetermined amount of the at least two of the respective solvents; (ii) pausing a flow of the at least two of the respective solvents during the flowing of the predetermined amount of the at least one ingredient from the plurality of ingredient reservoirs; and (iii) finally flowing a remainder of the predetermined amount of the at least two of the respective solvents. ### Claim 18 (depends on 17) The method of claim 17, further comprising, in response to receiving the request for the fluid mixture, sequencing, by a controller of the fluid mixture dispensing system, the initially flowing, the pausing, and the finally flowing with respect to the flowing of the predetermined amount of the at least one ingredient from the plurality of ingredient reservoirs. ### Claim 19 (depends on 15) The method of claim 15, further comprising, in response to receiving the request for the fluid mixture, controlling, by a controller of the fluid mixture dispensing system, one or more fluid moving mechanisms to flow the predetermined amount of the at least two of the respective solvents from the at least two solvent reservoirs and the predetermined amount of the at least one ingredient from the plurality of ingredient reservoirs to the two or more mixing channels. ### Claim 20 (depends on 19) The method of claim 19, wherein the one or more fluid moving mechanisms comprise a plurality of electromechanical valves, each of the plurality of electromechanical valves respective to one of the plurality of ingredient reservoirs. ### Claim 21 (depends on 15) The method of claim 15, wherein the one of the respective solvents from the at least two solvent reservoirs comprises alcohol. ### Claim 22 A fluid mixture dispensing system comprising: a plurality of solvent reservoirs, each containing a respective solvent; a plurality of ingredient reservoirs, each containing a respective ingredient; two or more mixing channels, each of the two or more mixing channels fluidly connected to (a) a particular two or more of the plurality of solvent reservoirs, and (b) a respective one or more of the plurality of ingredient reservoirs, wherein each of the plurality of ingredient reservoirs is configured to dispense into a respective one of the two or more mixing channels; a mixing chamber fluidly connected to the two or more mixing channels; a dispenser fluidly connected to the mixing chamber; and a controller, wherein the controller is programmed to: receive a request for a fluid mixture; and in response to receiving the request for the fluid mixture, control operations of the fluid mixture dispensing system to produce the requested fluid mixture by: mixing, in the two or more mixing channels to form an intermediate fluid mixture, (i) a respective predetermined amount of the respective solvents from each of the particular solvent reservoirs, and (ii) a respective predetermined amount of the respective ingredients from each of one or more of the plurality of ingredient reservoirs; flowing, to the mixing chamber, the intermediate fluid mixture, wherein the fluid mixture comprises the intermediate fluid mixture; flowing a second predetermined amount of at least one of the respective solvents from the plurality of solvent reservoirs to the mixing chamber; and dispensing the fluid mixture via the dispenser. ### Claim 23 (depends on 22) The fluid mixture dispensing system of claim 22, wherein the plurality of ingredient reservoirs is stored in at least one cartridge; and wherein the at least one cartridge is configured to dispense the respective predetermined amount of the respective ingredients from each of the one or more of the plurality of ingredient reservoirs into the two or more mixing channels. ### Claim 24 (depends on 23) The fluid mixture dispensing system of claim 23, further comprising a plurality of electromechanical valves, each of the plurality of ingredient reservoirs respective to one of the plurality of electromechanical valves; and wherein the respective predetermined amount of the respective ingredients from each of the one or more of the plurality of ingredient reservoirs is dispensed into the two or more mixing channels via the respective electromechanical valve. ### Claim 25 (depends on 24) The fluid mixture dispensing system of claim 24, wherein the at least one cartridge comprises a pressurized chamber, the pressurized chamber containing the plurality of ingredient reservoirs; and wherein the controller is further programmed to control pressure of the pressurized chamber. ### Claim 26 (depends on 25) The fluid mixture dispensing system of claim 25, wherein the controller is further programmed to control the dispensing of the respective predetermined amount of the respective ingredients from each of the one or more of the plurality of ingredient reservoirs by opening the respective electromechanical valve for a time period based on at least the pressure of the pressurized chamber. ### Claim 27 (depends on 23) The fluid mixture dispensing system of claim 23, wherein the respective predetermined amount of the respective solvents from each of the particular solvent reservoirs are combined in a fluid path between the particular solvent reservoirs and the two or more mixing channels. ### Claim 28 A fluid mixture dispensing system comprising: at least two solvent reservoirs containing respective solvents; a plurality of ingredient reservoirs; two or more mixing channels fluidly connected to the at least two solvent reservoirs and each fluidly connected to at least one of the plurality of ingredient reservoirs; a mixing chamber fluidly connected to the two or more mixing channels; a dispenser fluidly connected to the mixing chamber; and a controller, wherein the controller is programmed to: receive a request for a fluid mixture; and in response to receiving the request for the fluid mixture: flow a predetermined amount of at least two of the respective solvents from the at least two solvent reservoirs and a predetermined amount of at least one ingredient from the plurality of ingredient reservoirs to the two or more mixing channels to form an intermediate fluid mixture; flow the intermediate fluid mixture to the mixing chamber to form the fluid mixture; and dispense the fluid mixture from the mixing chamber via the dispenser; wherein the predetermined amount of the at least two of the respective solvents from the at least two solvent reservoirs is combined in a fluid path between the at least two solvent reservoirs and the two or more mixing channels. ### Claim 29 A fluid mixture dispensing system comprising: at least two solvent reservoirs containing respective solvents; a plurality of ingredient reservoirs; two or more mixing channels fluidly connected to the at least two solvent reservoirs and each fluidly connected to at least one of the plurality of ingredient reservoirs; a mixing chamber fluidly connected to the two or more mixing channels; a dispenser fluidly connected to the mixing chamber; and a controller, wherein the controller is programmed to: receive a request for a fluid mixture; and in response to receiving the request for the fluid mixture: flow a predetermined amount of at least two of the respective solvents from the at least two solvent reservoirs and a predetermined amount of at least one ingredient from the plurality of ingredient reservoirs to the two or more mixing channels to form an intermediate fluid mixture; flow the intermediate fluid mixture to the mixing chamber to form the fluid mixture; and dispense the fluid mixture from the mixing chamber via the dispenser; wherein the flow of the predetermined amount of the at least two of the respective solvents from the at least two solvent reservoirs comprises: an initial flow of some of the predetermined amount of the at least two of the respective solvents; a pause in a flow of the at least two of the respective solvents during the flow of the predetermined amount of the at least one ingredient from the plurality of ingredient reservoirs; and a final flow of a remainder of the predetermined amount of the at least two of the respective solvents. ### Claim 30 A method used in a fluid mixture dispensing system having (a) at least two solvent reservoirs containing respective solvents; (b) a plurality of ingredient reservoirs; and (c) two or more mixing channels fluidly connected to the at least two solvent reservoirs and each fluidly connected to at least one of the plurality of ingredient reservoirs, the method comprising: receiving a request for a fluid mixture; and in response to receiving the request for the fluid mixture, (a) flowing a predetermined amount of at least two of the respective solvents from the at least two solvent reservoirs and a predetermined amount of at least one ingredient from the plurality of ingredient reservoirs to the two or more mixing channels to form an intermediate fluid mixture; (b) combining, in a fluid path between the at least two solvent reservoirs and the two or more mixing channels, the predetermined amount of the at least two of the respective solvents from the at least two solvent reservoirs; (c) flowing the intermediate fluid mixture to a mixing chamber to form the fluid mixture; and (d) dispensing the fluid mixture from the mixing chamber via a dispenser. ### Claim 31 (depends on 28) The fluid mixture dispensing system of claim 28, wherein the controller is further programmed to flow a second predetermined amount of one of the respective solvents from the at least two solvent reservoirs to the mixing chamber to form the fluid mixture. ### Claim 32 A method used in a fluid mixture dispensing system having (a) at least two solvent reservoirs containing respective solvents; (b) a plurality of ingredient reservoirs; and (c) two or more mixing channels fluidly connected to the at least two solvent reservoirs and each fluidly connected to at least one of the plurality of ingredient reservoirs, the method comprising: receiving a request for a fluid mixture; and in response to receiving the request for the fluid mixture, (a) flowing a predetermined amount of at least two of the respective solvents from the at least two solvent reservoirs and a predetermined amount of at least one ingredient from the plurality of ingredient reservoirs to the two or more mixing channels to form an intermediate fluid mixture; (b) flowing the intermediate fluid mixture to a mixing chamber to form the fluid mixture; and (c) dispensing the fluid mixture from the mixing chamber via a dispenser; wherein the flowing the predetermined amount of the at least two of the respective solvents from the at least two solvent reservoirs comprises: (i) initially flowing some of the predetermined amount of the at least two of the respective solvents; (ii) pausing a flow of the at least two of the respective solvents during the flowing of the predetermined amount of the at least one ingredient from the plurality of ingredient reservoirs; and (iii) finally flowing a remainder of the predetermined amount of the at least two of the respective solvents. ### Claim 33 (depends on 32) The method of claim 32, further comprising, in response to receiving the request for the fluid mixture, flowing a second predetermined amount of one of the respective solvents from the at least two solvent reservoirs to the mixing chamber to form the fluid mixture. ### Claim 34 A fluid mixture dispensing system comprising: a plurality of solvent reservoirs, each containing a respective solvent; a plurality of ingredient reservoirs, each containing a respective ingredient; two or more mixing channels, each of the two or more mixing channels fluidly connected to (a) a particular two or more of the plurality of solvent reservoirs, and (b) a respective one or more of the plurality of ingredient reservoirs, wherein each of the plurality of ingredient reservoirs is configured to dispense into a respective one of the two or more mixing channels; a mixing chamber fluidly connected to the two or more mixing channels; a dispenser fluidly connected to the mixing chamber; and a controller, wherein the controller is programmed to: receive a request for a fluid mixture; and in response to receiving the request for the fluid mixture, control operations of the fluid mixture dispensing system to produce the requested fluid mixture by: mixing, in the two or more mixing channels to form an intermediate fluid mixture, (i) a respective predetermined amount of the respective solvents from each of the particular solvent reservoirs, and (ii) a respective predetermined amount of the respective ingredients from each of one or more of the plurality of ingredient reservoirs; flowing, to the mixing chamber and then to the dispenser, the intermediate fluid mixture, wherein the fluid mixture comprises the intermediate fluid mixture; and dispensing the fluid mixture via the dispenser; wherein the respective predetermined amount of the respective solvents from each of the particular solvent reservoirs are combined in a fluid path between the particular solvent reservoirs and the two or more mixing channels. ### Claim 35 A fluid mixture dispensing system comprising: a plurality of solvent reservoirs, each containing a respective solvent; a plurality of ingredient reservoirs, each containing a respective ingredient; two or more mixing channels, each of the two or more mixing channels fluidly connected to (a) a particular two or more of the plurality of solvent reservoirs, and (b) a respective one or more of the plurality of ingredient reservoirs, wherein each of the plurality of ingredient reservoirs is configured to dispense into a respective one of the two or more mixing channels; a mixing chamber fluidly connected to the two or more mixing channels; a dispenser fluidly connected to the mixing chamber; and a controller, wherein the controller is programmed to: receive a request for a fluid mixture; and in response to receiving the request for the fluid mixture, control operations of the fluid mixture dispensing system to produce the requested fluid mixture by: mixing, in the two or more mixing channels to form an intermediate fluid mixture, (i) a respective predetermined amount of the respective solvents from each of the particular solvent reservoirs, and (ii) a respective predetermined amount of the respective ingredients from each of one or more of the plurality of ingredient reservoirs; flowing, to the mixing chamber and then to the dispenser, the intermediate fluid mixture, wherein the fluid mixture comprises the intermediate fluid mixture; and dispensing the fluid mixture via the dispenser; wherein the respective predetermined amount of the respective solvents is provided in a flow, and wherein the flow comprises: an initial flow of some of the predetermined amount of the respective solvents; a pause in the flow of the respective solvents to receive the predetermined amount of the respective ingredients; and a final flow of a remainder of the predetermined amount of the respective solvents. ### Claim 36 (depends on 35) The fluid mixture dispensing system of claim 35, wherein the controller is further programmed, in response to receiving the request for the fluid mixture, to control operations of the fluid mixture dispensing system to produce the requested fluid mixture by flowing a second predetermined amount of at least one of the respective solvents from the plurality of solvent reservoirs to the mixing chamber.