Abstract: Some implementations herein described improvements to concrete products and processes for producing concrete products that may provide a positive environmental impact and that can be stronger relative to the percent of cement used. Particular examples include improvements to zero-slump to near-zero-slump concrete mixture design, material storage and handling, batching, mixing, sequencing and curing processes, as well as forming and curing techniques.

Abstract: According to the present disclosure, at least two fluid inlet/outlet pipes, each of which is provided with a filter, are installed outside a structure to be bent and an end of each of the fluid inlet/outlet pipes is connected to a pressure sensor provided on the structure. Thus, since a fluid in the state in which low-frequency and high-frequency components of the disturbances generated outside the structure are removed therefrom acts on the pressure sensor, the underwater pressure sensing apparatus is capable of measuring fluid pressure in a stable state.

Abstract: An apparatus for mass producing monodisperse microbubbles contains a microfluidic flow focusing device. The microfluidic flow focusing device includes a dispersed phase fluid supply channel having an outlet that discharges into a flow focusing junction, a continuous phase fluid supply channel having an outlet that discharges into the flow focusing junction, and a bubble formation channel having an inlet disposed at the flow focusing junction. The configuration of the flow focusing junction is such that, in operation, a flow of dispersed phase fluid discharging from the outlet of the dispersed phase fluid supply channel is engageable in co-flow by a focusing flow of continuous phase fluid discharging from the outlet of the at least one continuous phase fluid supply channel under formation of a gradually thinning jet of dispersed phase fluid that extends into the inlet of the bubble formation channel.

Abstract: A dry powder delivery device may be configured to provide micronized dry powder particles to airways of a user. The device may include a cylindrical container delimiting a chamber containing at least one magnetically-responsive object, a motor external to said chamber, a magnet external to the chamber and rotatably coupled with the motor, and an outflow member configured to direct airflow to a user. The magnetically-responsive object may be coated with micronized dry powder particles, and the motor may be operable to rotate the magnet about an axis. Rotation of the magnet creates a magnetic field that causes the magnetically-responsive object to move in response to the magnetic field and collide with a side wall of the container to deaggregate the dry powder particles and aerosolize the dry powder in the chamber.

Abstract: Rotary lance drives for rotating a lance for injecting gas and powdered reagents into molten metal include a reciprocating rotary lance drive and an associated method. A lance mount which facilitates loading of a lance into a lance drive is also disclosed. Various lance designs are described for improving dispersion of reagent and decreasing process time, including lances having non-circular refractory portions and lances having cross-port arrangements for more evenly distributed reagent discharge.

Abstract: A two-substance nozzle for spraying a liquid-gas mixture, including a nozzle housing including at least one liquid inlet leading into a mixing chamber and at least one gas inlet leading into the mixing chamber, a swirl insert, an outlet chamber between the swirl insert and an outlet opening on the downstream end of the outlet chamber, wherein a restrictor is provided on the downstream end of the mixing chamber and an intermediate chamber is provided between the restrictor and the swirl insert.

Abstract: Prepping a surface entails entraining a coating particle into a fluid stream, directing the fluid stream containing the coating particle at the surface to be prepped to thereby prep the surface using the coating particle. The prepped surface can then be coated using the same or substantially similar coating particle. This technique can be used with a continuous airjet, a forced pulsed airjet, a continuous waterjet or a forced pulsed waterjet as the carrier stream. This invention solves the problem of foreign blasting particles becoming embedded in the atomic matrix of the surface to be prepped, which can result in unpredictable behavior of the surface properties and even catastrophic failure.

Abstract: An air control and aromatherapy module for a jetted tub comprising an air control member having a body portion defining an intake opening, a scent container defining a scent opening, and a housing having a body portion. The scent container is positioned within the body portion of the air control member. The air control member and the scent container are at least partially disposed within the body portion of the housing. The air control member and the housing define a central passageway and the scent opening of the scent container is in fluid communication with the central passageway. A method of providing aromatherapy to a jetted tub is also disclosed.

Abstract: For transport of granulate from a granulation tank by means of liquid and air, an ejector is provided with a side inlet for granulate, a first end with a spray nozzle for pressurized transport liquid, and a second end with an inlet for pressurized gas. Downstream from the second end, an outlet spray nozzle for a three-phase flow of liquid, granulate, and gas is provided. A first conduit has a lower end connected with the outlet for transport of the three-phase flow. The ejector includes a tubular ejector housing with an internal wear liner and an outlet spray nozzle made from a durable material. The inlet for pressurized gas includes a ring-shaped chamber that surrounds the periphery of the ejector and is connected with the inside of the ejector through a ring-shaped slit that directs the pressurized gas towards the outlet of the ejector.

Abstract: A compressed gas foam system is provided. The compressed gas foam system includes one or more optional fluid pumps, one or more mixing devices, one or more optional foam systems; one or more optional gas compressors, and a system controller. A method of using the compressed gas foam system is also provided.

Abstract: A system for cleaning a substrate with a foam performs a method for generating a cleaning foam. In the first operation of the method, the system pumps a fluid into a premix chamber. The premix chamber is a component of a male plug which fits into a female housing in the system. Then the system injects a gas into the premix chamber to initiate generation of the foam from the fluid. The foam flows from the premix chamber into a sealed helical channel formed by a helical indentation on an outside surface of the male plug and an inner surface of the female housing to allow the foam to reach a desired state along a length of the sealed helical channel. In the last operation of the method, the foam outputs from an exit end of the helical channel through the male plug to a component of the system.

Abstract: A method and an apparatus are described for generating a concentrated aerosol. A first heated volume flow of pressurized gas, a second volume flow of preheated dilution gas, and a third volume flow of fluid are provided. After creating a droplet aerosol from a solution, the aerosol solvent is quickly evaporated for creating a powder aerosol that then concentrated with a virtual impactor. The apparatus comprises a low flow resistance and achieves a high evaporation rate. The apparatus comprises a flow conditioner, nozzle, nozzle holder, and a concentrator.

Abstract: A system and method of injecting a gas enriched and/or emulsified first liquid into a second liquid is disclosed. The injection can cause generation of a high density of bubbles having a mean diameter of a selected size. The mean diameter of the bubbles can be selected and varied based on the characteristics of the injection system.

Abstract: An improved shower soap dispenser for use with liquid soap, gels and body washes. It consists of a soap storage reservoir, main body containing control valves that intersects and connects directly to a conventional shower pipe and shower head. It mixes an adjustable amount of liquid soap with air into the flowing water. Its improved main valve, through incorporation of a truncated cone, provides greater vacuum and water flow to make it compatible with a wider range of water pressure and soap density and viscosity. The improved main valve also provides the capability for the user to clean out water passages of the dispenser without disassembly or removing any parts.

Abstract: An apparatus for preparing a chemical solution includes a lower housing and an upper housing. The lower housing has a base, an upper plate having a central opening, and a side wall. A grid mounted on the upper plate covers the opening. A wall within the lower housing divides the interior of the lower housing into a central inner chamber and an annular outer chamber; this wall extends into an upper portion of the lower housing. One portion of the wall has a reduced height to permit fluid flow from the inner chamber to the outer chamber. A nozzle is mounted in the inner chamber for discharging fluid into the inner chamber, and causes local elevation of a portion of the fluid surface above the grid. The nozzle may be an eductor creating a venturi effect to draw fluid into the eductor.

Abstract: An injector for co-feeding liquid and solid fuels into a gasifier is provided. The injector includes a body, a first member, and a second member. The body comprises a first channel for conveying a liquid fuel. The first member surrounds the body to define a second channel for pneumatically conveying a solid fuel. The second member surrounds the first member to define a third channel for conveying a fluid stream for dispersing the solid fuel. The liquid fuel is atomized before being mixed with the solid fuel. A method for co-feeding liquid and solid fuels is also presented.

Abstract: A reboiling jet apparatus includes at least two nozzles in series, configured to cause boiling of a hot liquid in the first nozzle, deceleration and reduction of the gas phase in the second nozzle, followed by acceleration and reboiling in the second nozzle. A second deceleration and reduction of the gas phase occurs at the outlet of the second nozzle. Each deceleration causes heating of the liquid by reduction of the gas phase; thus, energy of a pressurized input fluid is efficiently converted into heat by action of the nozzles. A convergent-divergent nozzle for steam injection with a mixing chamber may be used instead of the first nozzle to cause the first boiling. Another nozzle may be used to introduce a cold fluid at the outlet of the second nozzle for mixing with the hot flow prior to completion of the second deceleration.

Abstract: A process for mixing a liquid or mixture of a liquid and a fine solid present in a vessel, in which the vessel is supplied with the same liquid or the same mixture as a motive jet of a jet nozzle which is present in the vessel and has a motive jet and a momentum exchange chamber, the suction region between motive nozzle and momentum exchange chamber being provided with a sheath which has a suction orifice below the central jet leading from the motive nozzle into the momentum exchange chamber.

Abstract: This invention relates to a method to produce reproducible and homogeneous coatings and to fine-tune the coating morphology. More particularly, the invention relates to a method and apparatus for controlling the particle formation and deposition process to form a biocompatible coating on a medical implant or a tissue.

Abstract: The invention relates to systems and methods for forming coatings that can elute active agents and coating produced by the same. In an embodiment, the invention includes an apparatus for applying a coating to a medical device including a first spray nozzle, a first coating composition supply conduit, a second spray nozzle, and a second coating composition supply conduit. In an embodiment, the invention includes a method of applying a coating to a medical device including forming a first spray stream, forming a second spray stream, and directing the spray streams toward the medical device so that the first spray stream intersects the second spray stream before hitting the medical device. In an embodiment, the invention includes an apparatus for applying a coating to a medical device including a spray nozzle, a first coating composition supply conduit and a second coating composition supply conduit.

Abstract: An apparatus for preparing a chemical solution includes a lower housing and an upper housing. The lower housing has a base, an upper plate having a central opening, and a side wall. A grid mounted on the upper plate covers the opening. A wall within the lower housing divides the interior of the lower housing into a central inner chamber and an annular outer chamber; this wall extends into an upper portion of the lower housing. One portion of the wall has a reduced height to permit fluid flow from the inner chamber to the outer chamber. A nozzle is mounted in the inner chamber for discharging fluid into the inner chamber, and causes local elevation of a portion of the fluid surface above the grid. The nozzle may be an eductor creating a venturi effect to draw fluid into the eductor.

Abstract: An explosive and narcotics detection system detects the presence of trace particles of those materials that are adhering to surfaces. The particles are removed from the surface, transported and collected in a particle collection medium, and then provided to detection instrument. Narcotics and explosive particles are often bound tenaciously to the surface, and simple techniques, such as blowing air, will either remove only the largest particles or none at all. Techniques for the removal of narcotics and explosives particles are described which utilize an aerosol mixture of aerosol particles in a gas stream to impact and more efficiently remove the target narcotics and explosives particles from the surface.

Abstract: Method for the production of dry, free-flowing, stable hydrophobin preparations by spraying and drying aqueous hydrophobin solutions, if appropriate comprising additives in a spray device.

Abstract: For transport of granulate from a granulation tank by means of liquid and air, an ejector is provided with a side inlet for granulate, a first end with a spray nozzle for pressurized transport liquid, and a second end with an inlet for pressurized gas. Downstream from the second end, an outlet spray nozzle for a three-phase flow of liquid, granulate, and gas is provided. A first conduit has a lower end connected with the outlet for transport of the three-phase flow. The ejector includes a tubular ejector housing with an internal wear liner and an outlet spray nozzle made from a durable material. The inlet for pressurized gas includes a ring-shaped chamber that surrounds the periphery of the ejector and is connected with the inside of the ejector through a ring-shaped slit that directs the pressurized gas towards the outlet of the ejector.

Abstract: A plumbing fixture including, but not limited to, an aspirating type shower head operates to add a selected scent to the spray water. The showerhead utilizes a venturi assembly where the water supply passes through a venturi. A negative pressure is created at the high velocity water jet stream point, near the narrow area of the venturi. A number of small openings in the venturi, to a surrounding air chamber, allow air from the chamber, to be drawn into the venturi. The air chamber has inlet openings for the aspiration of room air. At a portion of these inlet openings is a quick connect port to receive a scented cartridge. The scent cartridge is positioned within the quick connect port of the showerhead. Room air is drawn through and over the scented material where the high velocity air picks up scent molecules for expulsion from the outlet.

Abstract: A pulverisation head of an apparatus includes a motor whose vertical hollow shaft is integrally linked, at its lower end, to a centrifugal ejection disc. The substance to be pulverised, coming from a tank via a proportioning pump, crosses the hollow shaft to be spread in a thin layer on the lower surface of the disc forming the centrifugal ejection face. Elements are designed to vibrate the peripheral edge of the disc and control the pulverisation of the substance. A fan and a distributor produce a treatment gas flow which meets and draws droplets towards a collection zone, solidifying them by drying or freezing. Typically, the substance is a mixture of at least one active ingredient and a microencapsulation constituent. For use to obtain very fine and/or very homogeneous particle size, to manufacture powders for food processing, nutritional, cosmetic, pharmaceutical and fine chemical applications. The head is useful to produce aerosols.

Abstract: The invention relates to a device for producing mist or aerosol. The device comprises at least two atomisers for atomizing a liquid into drop jets. In accordance with the invention, at least two atomizers are arranged oriented substantially directly towards one another in a manner making the drop jets produced thereby collide directly into each other.

Abstract: Systems according to embodiments of the present invention include an antifreeze manifold carrying pressurized antifreeze liquid, the pressurized antifreeze liquid having a foam surfactant, an air manifold carrying pressurized air, a junction of the antifreeze manifold and the air manifold, the junction configured to combine the pressurized antifreeze liquid and the pressurized air to form antifreeze foam, a foam generator configured to enhance bubble formation, and an outlet conduit to receive the foam. Methods according to embodiments of the present invention include storing an antifreeze liquid having a foam surfactant, pressurizing the antifreeze liquid to a first pressure, pressurizing a gas to a second pressure, wherein the second pressure is different from the first pressure, combining the antifreeze liquid at the first pressure with the gas at the second pressure to form an antifreeze foam, and injecting the antifreeze foam into a conduit to displace freezable fluid in the conduit.

Abstract: Diverse methods of utilization and the corresponding, related modifications, of linear type, Variable Gas Atomization (VGA) nozzles and lances are described. Therein is joined the mixing and gas atomization of chemicals that react to form active products that further react with harmful flue gas constituents of combustion so as to enable their effective collection. One version combines, in a lance assembly of nozzles, the injection of reactants, in the form of finely divided dry solids conveyed in a carrier air stream, and the fine atomization of water, aqueous solutions or slurries. Atomization of such streams is employed to effectively wet the surfaces of the dry particles and, thereby, promote the rapid sorption of gaseous constituents of flue gas being treated. Another version simultaneously mixes and atomizes reacting chemicals to produce, and release into the flue gas stream, strongly oxidizing, transient, species of their reaction products.

Abstract: In a supply system fluids are supplied separated from each other to a delivery head through chambers (1, 3, 5) formed in a single supply line. In the delivery head a fluid mixture is produced and delivered to the outside in the form of mist. It is possible to deliver different fluids or fluid mixtures within individual cycles by a control.

Abstract: A cold gas dynamic spray system is provided that includes a powder feeder for providing a metallic powder. A carrier gas source provides a carrier gas. A nozzle assembly includes multiple plates secured to one another. One of the plates provides a nozzle profile, such as a venturi, having a gas carrier inlet receiving the carrier gas. The nozzle profile also provides a powder injection region receiving the metallic powder In one example, a profile plate includes an aperture providing the venturi. The venturi includes converging and diverging portions joined by a throat. The carrier gas inlet is in communication with the converging portion upstream from the throat. The powder injection region is in communication with the diverging section downstream from the throat. The profile plate includes an end from which the intermixed metallic powder and carrier gas exit the nozzle assembly.

Abstract: A system is provided for spraying a material, the system comprising: a canister having a first threaded fitting in fluid communication with a valve seal; a dip tube extending from the valve seal into the canister; an adaptor having a second threaded fitting that mates with the threads of the first threaded fitting and an adaptor tube; and, a nozzle in fluid communication with the adaptor; wherein the adaptor tube interacts with the valve seal to move the valve into an open position, thereby establishing a continuous flow path from the canister to the nozzle through the dip tube, valve seal and adaptor tube.

Abstract: A plumbing fixture including an aspirating type showerhead operates to add a selected scent to the spray water. The showerhead utilizes a venturi assembly where the water supply passes through a venturi. A negative pressure is created at the high velocity water jet stream point, near the narrow area of the venturi. A number of small openings in the venturi, to a surrounding air chamber, allow air from the chamber, to be drawn into the venturi. The air chamber has inlet openings for the aspiration of room air. At a portion of these inlet openings is a quick connect port to receive a scented cartridge. The scent cartridge is then inserted into the quick connect port of the showerhead. Room air is then drawn through and over the scent cartridge where the high velocity air picks up scent molecules from the scented wick within the cartridge.

Abstract: To mix immiscible materials at low pressure, the materials are applied from separate inputs of a fixture to separate channels where they are permitted to flow to and spread over surfaces or edges at selected thicknesses. On the surfaces or edges the materials are each subject to flowing air that forms small particles or drops even though the materials may be viscous. The particles or drops are mixed together and may be applied to a combustion device or spray device or any other device utilizing the mixture.

Abstract: An apparatus and method are disclosed for cooling one or more exercising or resting individuals by applying a water mist and dry air. The apparatus can be free standing, fixed to the walls or ceiling, or attached to an object on which an individual is resting or exercising. The mist and dry air can be applied together or separately, simultaneously or alternately, with varying timing and intensity. In some embodiments, the mist and dry air are manually controlled or operate according to the passage of time. In other embodiments the need for cooling is determined by one or more physiological parameters measured by sensors directed toward or attached to an individual, or embedded in an object on which an individual is resting or exercising. Still other embodiments estimate the heating of the individual by measuring the amount of work performed or the rate of energy expenditure.

Abstract: Disclosed is a portable water-based paint spray apparatus and method of using the same. Argon gas is preferably used both to charge the spray container with pressure and is also used to atomize the water-based paint at the spray receptor.

Abstract: An apparatus, system, and method are disclosed for providing air to an injector nozzle. An injector nozzle is in fluid communication with a dosing fluid input. An opening substantially circumscribes the injector nozzle. The injector nozzle is directed toward the opening, injecting a fluid from the dosing fluid input through the opening. An injector air output is in fluid communication with an air input port and with the opening. The injector air output is directed toward the opening, injecting air from the air input port through the opening. The injector air output creates a positive air pressure around the injector nozzle.

Abstract: The present application relates to granules of powdery mineral particles produced by spray granulation of a liquid slurry comprising powdery minerals particles having particle size below 10 m, at least one water-reducing agent and/or at least one binder agent and/or at least one dispersing agent. The application further relates to a method for producing such granules.

Abstract: A vehicle having a tire fire suppression system includes a vehicle body for transportation of occupants or cargo. A plurality of combustible tires is connected to the body. The tires are susceptible to auto-ignition in response to exposure to an elevated temperature condition. The fire suppression system is connected to the body and includes a container of a fire suppressant. At least one temperature sensor is positioned in close proximity to at least one of the tires. The temperature sensor is adapted to be activated in response to the elevated temperature condition and before the auto-ignition. At least one nozzle is positioned to direct the suppressant toward the tire. An actuator connects the container to the nozzle for the suppressant to be dispersed from the nozzle in response to activation of the sensor.

Abstract: In a supply system fluids are supplied separated from each other to a delivery head through chambers (1, 3, 5) formed in a single supply line. In the delivery head a fluid mixture is produced and delivered to the outside in the form of mist. It is possible to deliver different fluids or fluid mixtures within individual cycles by a control.

Abstract: A vessel for conveying a precursor fluid from the vessel, comprising: an interior volume having an upper volume and a lower volume, wherein the two volumes are in communication and the lower volume contains precursor; a lid comprising a fluid inlet directing carrier gas into the vessel, a “T” fluid outlet, a sidewall having an upper lip wherein the upper lip contacts the lid; a separator interposed between the lid and the sidewall wherein the separator resides adjacent the upper lip and segments the interior volume into the upper volume and a lower volume; and an inlet plenum in communication with the fluid inlet having a plenum chamber opening towards the separator to direct the carrier gas through the separator and towards the precursor. A method for using the apparatus is also disclosed.

Abstract: A liquid dispenser (100) primarily for use in dispensing liquid drench to animals. The dispenser (100) is electronic in operation and has the ability to control the speed of its pump (5) according to environmental conditions including the viscosity of the liquid being dispensed.

Abstract: A device and method are provided for forming vapor mainly utilizing the atomization device to form low temperature water vapor, and then using an adjustable heating unit to warm the low temperature water vapor, or mixing some high temperature steam to get needed temperature water vapor. The invention uses the atomization device which mainly was used to humidify the air to form the needed water vapor in beauty, hairdressing, or health care so as to adjust the temperature of water vapor to solve the problems which are existing in the fields of beauty, hairdressing, health care, where the high temperature steam scalds a person more easily, and the temperature is difficult to control. The present invention makes the application of the steam in these fields more free, common and popular.

Abstract: The present invention relates to the atomization of high-solid content fluids. More particularly, the present invention relates to a system [10] and method for the uniform spray application of roofing materials and, in particular, to the uniform spray application of emulsified asphalts and emulsified asphalt matrices with embedded fiberglass strands. In a preferred embodiment, an engine or equivalent power source [20] is provided. An oil pump [40] is mechanically connected to the engine [20]. A hydraulic motor [80] is hydraulically connected to the oil pump [40]. A reciprocating pump [100] is mechanically connected to the hydraulic motor [80]. The reciprocating pump [100] is connected to a one-way valve [120] which is connected in series with a pulsation dampener [130]. The pulsation dampener [130] dampens the pressured spikes of the slurry exiting the reciprocating pump [100].

Abstract: Methods and systems for simulating multi-phase fluid flows, including fire suppressant flows, are disclosed. A method in accordance with one embodiment of the invention includes estimating flow properties of a multi-phase flow at a boundary of a volume and, based on the estimate of flow properties at the volume boundary, at least estimating a value for a quality of the multi-phase flow at the volume boundary. Based on the quality of the flow and the flow properties, the method can further include at least estimating a value for a liquid phase droplet velocity of a liquid phase portion of the flow, and based on the liquid phase droplet velocity, simulating characteristics of the flow into the volume. Accordingly, the method can be used to predict constituent concentrations in the volume, for example, concentrations of a fire suppressant in an aircraft engine compartment.

Abstract: The present invention relates to a nozzle for thinning of phosphine (chemical formula PH3), which is consisting in a tube-like air-inducing, a ring-like mounted split (ring split) and/or in at least one lateral mounted little tube as PH3-inducing (inducer), whereby the thickness of the split opening and/or of the opening of the little tube is maximum 1/25 of the diameter of the tube like air-inducing (inducer) and/or of the distance between the surface of an air guiding element and the inner side of the tube-like air-inducing (inducer) in the area of the PH3-entrance.

Abstract: A dispensing system comprising first and second valve modules each having an output for delivering a liquid under pressure, a nozzle assembly coupled to the first and second valve modules, the nozzle assembly having at least two separated, at least partially coextensive outputs respectively communicating independently with the outputs of the first and second valve modules. A nozzle assembly adapted to be coupled to first and second valve modules each having an output for delivering a liquid under pressure, the nozzle assembly having two liquid inputs and at least two separated, at least partially coextensive outputs respectively communicating independently with the two liquid inputs, and the two liquid inputs adapted to be coupled in communication with the outputs of the first and second valve modules.

Abstract: This disclosure relates to a novel process for atomizing a liquid material or a mixture of liquid materials. More specifically, this disclosure advances the art by utilizing the inertial forces created in an elevated acceleration environment to further miniaturize and enhance the characteristics of particles resulting from atomization. The key to this disclosure is to subject a melt material to an elevated acceleration and pass a fluid over the surface of the melt. The purpose of the elevated acceleration is to elevate the relative importance of gravitational forces in the melt thus miniaturizing any gravity influenced disturbance. This elevated acceleration environment leads to miniaturization of gravitationally dependent phenomena thus leading to smaller particle creation. The purpose of the atomizing fluid is to impart kinetic energy onto the melt thereby causing disturbances and to act as a heat transfer media to cool the particles.

Abstract: An apparatus and method for producing particles using supercritical fluid with enhanced mixing. The process includes a vessel having an inner surface defining a chamber. A high-speed shear or turbulent mixer is incorporated inside the vessel in order to create a region of enhanced mixing (mixing zone). A supercritical fluid pump communicates with the first inlet, and supplies supercritical fluid into the mixing zone through the first inlet. A solution pump communicates with the second inlet, and supplies solution into the mixing zone through the second inlet. A mixer assembly includes a motor drive and a rotor. The rotor is in the mixing zone and can mix the solution and the supercritical fluid. Particles are produced when the solution and the supercritical fluid are pumped into the mixing zone while the rotor is mixing. The design of the mixer and the direction of the flow of materials into the chamber creates a plug flow in the mixing zone.

Abstract: A method and system are provided for dispensing a colored polymerizing composition. Two reactive components and one color component are pumped from respective containers at a metered volume. The color component, which is preferably a low-viscosity automotive paint is injected into either the first or second stream of reactive component at a point immediately prior to mixing all components in a dispensing device for dispensing the resulting colored fluid mixture onto a surface to be coated. The mixture may be dispensed by pouring or spraying onto the surface. The method and system are particularly useful for mixing and dispensing colored polyurethane or polyurea coatings, such as for spray-on truck bed liners.