Abstract: The present invention concerns a mixing device for foodstuff materials capable of flow, in particular sausage meat. The device comprises a housing having an inlet for introduction of the material and an outlet for discharge of the material. In order to improve the mixing and flow, in particular of sausage meat, at least two helical mixing elements are arranged statically in mutually juxtaposed relationship within the housing for mixing and/or processing material flowing through the housing. Meat products such as air-bearing sausage meat can be gently and carefully thoroughly mixed. Even delicate inclusions, such as mushrooms, would not be damaged.

Abstract: A device for mixing two paste components, such as a dental impression substance and a catalyst, comprising a tubular housing, two inlet openings for the two paste components to be mixed, and an outlet opening for delivering the mixed paste, is presented. The housing consists of a premixing chamber at the front end and a tubular mixing chamber at the rear end. The two paste components are mixed first in the premixing chamber by a dynamic rotor and then mixed in the tubular mixing chamber by a twisted static shaft, resulting in a well mixed, bubble-free paste at the outlet opening of the housing.

Abstract: A diverter for containing and reducing the velocity of the particulate discharge from a well bore being subjected to the process of “cavitation.” The diverter has a generally conical hollow containment shell and an internal diverter assembly with replaceable wear parts wherein the flow is directed into a spiral path along the inner surface of the containment shell. The path of flow is such that the flow velocity is dissipated without impeding or obstructing the flow of particulates. Water can be injected into the flow to help prevent fine particulates from becoming airborne.

Abstract: A dispensing closure for viscous fluids contains a closure body, a closure lid and a living hinge structure hingeably connecting the closure lid to the closure body. The closure body includes an upper deck, a skirt configured and arranged to mount to a product container, and a flow conduit extending through the upper deck to provide a flow path from an interior of the closure to an exterior of the closure. The flow conduit includes an entrance orifice and an exit orifice, and an inner wall extending between the entrance orifice and the exit orifice. To provide the desired flow effect, the inner wall includes at least one flow inhibitor structure, such as helically threaded flights extending at least partially inwardly from the inner wall into the flow path to define an unobstructed central flow path and a partially obstructed peripheral flow path.

Abstract: An injection molding apparatus having a manifold and several manifold melt channels communicating with several hot runner nozzles includes a melt redistribution element. The melt redistribution element is placed at specific locations along the melt channels to balance the uneven shear stress profile accumulated during the flow of a melt along the manifold channels. The melt redistribution element has an unobstructed central melt bore having at its inlet a narrowing tapered channel portion. The melt redistribution element also includes a helical melt pathway portion that surrounds the central melt bore. The incoming melt is first subjected to a pressure increase by the tapered portion that causes the melt to flow at a higher velocity through the central melt bore. The outer portion of the melt is forced to flow along the helical path and thus it changes direction multiple times and partially mixes with the melt flowing through the central melt bore.

Abstract: The invention relates to a helical ribbon mixing gear with a mixing vessel (1), the inside of which is axially symmetrical, and a motor-driven central agitator axis (2) with laterally extending agitator anus (30, 31, 32) to which at least one sloping helical ribbon (4) with a circular inclination in a direction of rotation (D) is attached, an outer edge of the helical ribbon (40) being positioned near to a mixing vessel wall (10), an outer tooth profile (50-52) being formed at the wall-sided edge of the helical ribbon (40), with a radial profile depth (T) which is smaller than a radially adjacent ribbon width (B), and with a circular tooth spacing (W) of one to ten times the profile depth (T).

Abstract: A mixer for use in a transmission pipeline and a wellbore fluids pipeline having a mixing device. The pipeline extends from a well head to a processing facility. The mixer perturbs the flow into a non-laminar state. Mixer embodiments include a body having a cone shaped leading edge and a hemi-spherical end. Other embodiments include a double cone having a series of helical fins on the trailing end of the double cone and fins extending perpendicular to the pipeline axis having a triangular cross section. The fins may be staggered with a mix of vertically and horizontally orientations.

Abstract: To provide mixing elements of a Kenix type static mixer capable of decreasing fluids remaining wastefully in a casing without elongation of the casing, the mixing elements are arranged in a casing so that end parts adjacent in an axial direction are connected to cross almost orthogonally, the mixing element includes a partition wall part (1) in a thin flat plate shape for partitioning the casing into approximately equal cross sectional areas, and plural spiral blade parts (2, . . . ) having a shape of a thin plate twisted by approximately 180 degrees, and being positioned in spaces partitioned by the partition wall part (1), wherein outer peripheries of the spiral blade parts (2, . . . ) at the partition wall part (1) side are integrally contacted with the partition wall part (1), and outer peripheries of the spiral blade parts (2, . . . ) at the casing side are contacted with an inner wall of the casing.

Abstract: A mixing element, which is produced at low cost, has high mixture agitation effectiveness, and is easily made large, and a static fluid mixer using the mixing element are provided. Further, a gas-liquid treatment apparatus with high treatment ability is provided. A mixing element 1 includes: a cylindrical passage tube 2 trough which fluid flows; a plurality of spiral rightward rotation type first blades 3 formed of a perforated object, which are provided in the passage tube 2; a first inner cylindrical tube 5 shaped like a cylinder and disposed inside the blades 3; a plurality of spiral rightward rotation type blades 6 provided in the inner cylindrical tube 5; and an opening 9 formed in the axial center portion of the blades 6. A static fluid mixer is formed by using at least one mixing, element 1 mentioned above.

Abstract: A static mixer for mixing components of liquid reactive multicomponent compounds includes a jacket (1) having a mixing section (4). The static mixer also includes an inlet (2), an outlet (3), at least one mixing element (5) arranged in the mixing section (4) and having its outer dimensions adapted to inner dimensions of the jacket (1), and at least one chamber (6) arranged between the inlet (2) and the outlet (3) for receiving additives (7) which are added to a mixture produced in the static mixer.

Abstract: The present invention also relates to a fluid processing device using material pieces, which is usable for processing liquid and gas. The hexagon nut shaped material pieces of stainless steel and the like are heat-treated and oriented such that the material pieces form up into a kind of concentric circles and make single plane, with drawing lines linked the center points of the hexagonal nut shaped material pieces positioned the outermost circumferentially periphery of the concentric arrangement forming up into an equilateral hexagon and such arrangement is retained. Also, a fluid processing device comprises a hollow container that such field converter is positioned in.

Abstract: The static mixer comprises mixing elements for separating material to be mixed into a plurality of streams and a mechanism for the layered junction of the same, a transversal edge and guide walls that extend at an angle to said transversal edge, as well as deflecting elements arranged at an angle to the longitudinal axis and provided with openings. The mixer includes mixing elements comprising a transversal edge and a following transversal guide wall and at least two guide walls with lateral end sections and at least one bottom section disposed between said guide walls, thereby defining at least one opening on one side of said transversal edge and at least two openings on the other side of said transversal edge. In addition to a high mixing efficiency and a low pressure drop, a mixer of this kind provides reduced dead volumes and is thus more effective than mixers of the prior art.

Abstract: A mixer includes a mixer housing provided with two annular skirts respectively extending downward to form a receiving space for communicating with an interior of the tubular housing, a mixer element having a helix extending into the tubular housing, and a mixer inlet portion with a connection plate having two top openings selectively communicating with the two openings such that components received inside the two tubes are able to be selectively forced into the interior of the tubular housing for dispensing.

Abstract: A mixer includes a mixer housing provided with two annular skirts respectively extending downward to form a receiving space for communicating with an interior of the tubular housing, a mixer element having a helix extending into the tubular housing, and a mixer inlet portion with a connection plate having two top openings selectively communicating with the two openings such that components received inside the two tubes are able to be selectively forced into the interior of the tubular housing for dispensing.

Abstract: A system for dispensing a medium includes at least a first container to hold the medium, a pressurizing device, such as a pump, in fluid connection with the container for pressurizing the medium, and an agitation mechanism or device to maintain the components of the medium in a mixed state. The container and the pressurizing device can be separate units, as in the case of an bag or bottle in fluid connection with a peristaltic or other type of pump. The container and the pump can also be combined in a single unit, as in the case of a syringe, wherein the syringe barrel of the syringe acts to contain the medium and the syringe plunger pressurizes the medium within the syringe barrel. A method of injecting a multi-component medium includes the step of agitating the medium (for example, as described above) before or during an injection procedure to maintain the components of the medium in a mixed state.

Abstract: A static device and method of making is disclosed for mixing matter flowing therethrough. The invention comprises a tube having a polygonic cross section defining a plurality of corners. The tube is spirally twisted with the plurality of corners forming a plurality of helixes for causing the matter flowing through the tube to rotate in accordance with the plurality of helixes. A center section of the spirally twisted tube is formed in an arc having an arc center disposed normal to said axis of said twisted tube.

Abstract: A static device and method of making is disclosed for mixing matter flowing therethrough. The invention comprises a tube having a polygonic cross section defining a plurality of corners. The tube is spirally twisted with the plurality of corners forming a plurality of helixes for causing the matter flowing through the tube to rotate in accordance with the plurality of helixes. In a first embodiment of the invention, the static device provides a static mixing device. In a second embodiment of the invention, the static device includes a plurality of apertures defined in the helix for providing a static separating device.

Abstract: A method and device for treating sludge and slime to enable reuse in soil upgrading and in building material systems. Hydrophilic sludge and slime having a water content not less than 70% are continuously treated in a manner which enables colloid removal, dehydration, oxidation, sanitation, stabilization, mineralization, filtration and porosification. The device for treatment includes a hollow caisson traversed in the longitudinal direction by the treated product and provided with at least an intake for the product to be treated and at least an outlet for the treated product.

Abstract: In embodiments of the invention, a vortex chamber tool in a conduit includes: an outer barrel; an inner barrel that is concentric with the outer barrel; and a corkscrew deflector coupled to an inside wall of the outer barrel and an outside wall of the inner barrel to organize the flow of a fluid in the vortex chamber tool. The vortex chamber tool operates to convert a turbulent flow from an input portion of the conduit into a non-turbulent laminar flow at a downstream portion of the conduit.

Abstract: A fluid discharge pipe structure comprises a cylindrical body, an inlet side connection member having a through hole formed in one end part of the cylindrical body, an outlet side connection member having a through hole formed in another end part of the cylindrical body, a spiral blade body having spiral blades on an outer circumference thereof and provided close to the inlet side connection member of the cylindrical body, and a flip-flop phenomenon generating shaft body provided close to the outlet side connection member of the cylindrical body.

Abstract: An apparatus and method is disclosed for treating a liquid with a first and a second chemical. A liquid to be treated flows into a first inlet port of an intake manifold. A second inlet port of the intake manifold introduces a first chemical into the liquid. A first static mixing device comprising a spirally twisted tube forming a plurality of helixes and having an inlet port connected in fluid communication with an outlet port of the intake manifold is provided for mixing the first chemical with the liquid. The outlet port of the first static mixing device is connected to a first inlet port of an interconnecting manifold. A second inlet port of the interconnecting manifold introduces a second chemical into the liquid. A second static mixing device has an inlet in fluid communication with an outlet port of the interconnecting manifold for mixing the second chemical with the liquid and for eluting the treated liquid from an outlet port of the second static mixing device.

Abstract: A device for the emulsification and separation of small amounts of immiscible liquid phases has essentially a cover plate (2), which can be tightly connected to a base plate (1), where microchannels (4,4a,5,6,6a) in the form of grooves are cut out on the inner surface (3,3a) of the base plate (1) and/or cover plate (2). In a mixing zone, two microchannels (4,4a) run in a wave shape crossing one another a number of times. In a subsequent separation zone, they run essentially straight combined in a common microchannel (5). The otherwise tightly sealed-off microchannels (4,4a,5,6,6a) can be filled and emptied again via inlet apertures (8,8a) and outlet apertures (9,9a).

Abstract: An intake tubing includes a tubular member having a number of helical protuberances and a number of helical grooves formed in an inner peripheral surface, an inlet end for receiving fluid, and an outlet end for coupling to an engine. The helical protuberances and the helical grooves of the tubular member may guide the fluid to flow through the tubular member in great speed and to increase power of the engine when the fluid flows quickly toward the inlet end of the tubular member, and to generate eddy current and to lower the flowing speed of the fluid when the fluid flows slowly toward the inlet end of the tubular member, in order to economize fuel or fluid.

Abstract: A method for fixing a first fluid within a second fluid which includes the steps of mixing the first and second fluids together and subjecting the first and second fluids to an electric field and a high voltage corona like electric discharge. The method can be used, for example, to increase the oxygen content of water. It can also be used for the treatment of waste effluent. An apparatus for carrying out the process includes a fluid passageway defined between inner and outer elongated conduits with a preferably spirally configurated baffle means in the passageway and a plurality of electrode needles extending into the passageway.

Abstract: The present invention provides a paint container and colorant injector apparatus that includes a paint container that retains a base paint therein and provides an opening allowing access to the base paint. An injector assembly couples with the paint container and is operable to locally disperse colorant into the base paint. Such an apparatus is employed in a method for dispersing a colorant throughout a base paint. The method includes providing a base paint in a container, locally dispersing colorant in the base paint, thereafter sealing the container and shaking the container to further disperse the colorant in the base paint throughout the remainder thereof to effect uniform coloring of the base paint.

Abstract: An apparatus and a method for treating water or other liquid material and a guide plate for use in a tube An apparatus for treating water or other liquid material comprises a tubular element and a guide plate. The tubular element has an outer circumferential wall defining a through going passage therein and defining an inlet end and an outlet end. The guide plate is of an elongated configuration defining a longitudinal axe and is sidewise twisted one turn relative to the longitudinal axis. The guide plate is receivable within the passage for separating the passage into two parts for guiding water or other fluid material along the two parts of the passage from the inlet to the outlet end in one side wise turn.

Abstract: In a process for mixing reactant streams (1, 2; 5) to produce a product stream (10) using a mixing configuration (15, 16) having a number of reactant feed points, an excess component stream of one reactant is divided into two reactant substreams (1, 2) and fed into the suction region (3, 4) of a mixing space (12) at right angles to a deficient component (5) entering the mixing space (12).

Abstract: A method for fixing a first fluid within a second fluid which includes the steps of mixing the first and second fluids together and subjecting the first and second fluids to an electric field and a high voltage corona like electric discharge. The method can be used, for example, to increase the oxygen content of water. It can also be used for the treatment of waste effluent. An apparatus for carrying out the process includes a fluid passageway defined between inner and outer elongated conduits with a preferably spirally configurated baffle means in the passageway and a plurality of electrode needles extending into the passageway.

Abstract: A fluid contacting device including a bundle of notched and precontoured strips which are notched periodically at edges and shaped by giving proper orientation (twist) so that the liquid trickling down the strip flows and spreads on the contoured roughened surface simultaneously alternating back and forth on the two opposite sides of the strip and intermixing from one strip to adjoining ones through plurality of contact points achieved with haystack bundle like winding of alternately inclined strips around equipment axis to achieve intimate contact between trickling film and other phase traveling in the twisting channels.

Abstract: In order to enable the thorough mixture of a melt flow S made of plastic, and polyvinyl chloride in particular, with the lowest possible amount of damage and the adequate homogenization thereof, the melt flow S is divided into partial flows T, which partial flows T are twisted independently from one another about axes extending in the direction of flow and are thereafter joined again into a common melt flow S.

Abstract: In order to enable the thorough mixture of a melt flow S made of plastic, and polyvinyl chloride in particular, with the lowest possible amount of damage and the adequate homogenization thereof, the melt flow S is divided into partial flows T, which partial flows T are twisted independently from one another about axes extending in the direction of flow and are thereafter joined again into a common melt flow S.

Abstract: Static mixers are arranged so that its longitudinal direction is substantially vertical. A liquid supply mechanism supplies the liquid containing impurities from the upper end of the static mixer into the static mixer. A gas supply mechanism supplies gas from the lower end of the static mixer into the static mixer. The static mixer is fabricated so that one or more mixing elements comprising a passage tube through which fluid can pass and one or more spiral blades arranged inside the passage tube are, continuously or through one or more spacers, arranged in the longitudinal direction thereof. The liquid drops down inside the static mixer and the gas rises up inside the static mixer, so that the two are subjected to gas-liquid contact inside the static mixer.

Abstract: Poly(alkyl methacrylate) bone cement ingredients are prepackaged as two separate components in two separate chambers of a container which can be connected to a static mixer, where both components are in a liquid form that is at least substantially air-free, and wherein the static mixer can mix the two liquid components without mechanical agitation and without the introduction of air into the two liquid components during the transfer of the two liquid components from their separate chambers through the static mixer. The first liquid component is formed by premixing a bone cement liquid monomer with bone cement polymer powder, a polymerization initiator, and a stabilizer to form a liquid mixture. The second liquid component is formed by premixing bone cement liquid monomer with bone cement polymer powder, if any, a stabilizer, and an activator to form a liquid mixture.

Abstract: A curved tubular flow reactor designed for carrying out chemical reactions continuously, for preparing mixtures and as a liquid-phase heat exchanger comprises a plurality of successive bends having alternating directions of curvature.

Abstract: A static mixer for a viscous liquid for use in a chemical mechanical polishing process is provided. The static mixer is constructed of an elongated cylindrical tank, an elongated cylindrical mixing sleeve having a multiplicity of mixing apertures therethrough situated inside the tank, a plurality of curvilinear feed tubes situated at a top of the tank cavity for feeding a mixture of a viscous liquid and a solvent into the tank cavity, a spiral plate mounted on the interior surface of the tank wall extending continuously from a top wall to a bottom wall of the tank cavity, and an outlet tube that is situated at the bottom of the tank cavity inside the mixing sleeve for outputting a mixture.

Abstract: The present invention is to provide a gas-liquid processing apparatus having a high contact efficiency of a gas and a liquid and a high reaction efficiency at a low production cost. A static type fluid mixer includes a passage pipe for the passage of a fluid and a spiral blade body arranged in the passage pipe with the longitudinal direction substantially perpendicularly but being absent in the center portion of the passage pipe. A liquid and a gas are supplied into the static type fluid mixer and a fluid is returned from the bottom portion of the static type fluid mixer to the upper portion via the pipe for the fluid circulation. The fluid is maintained in the static type fluid mixer at a pressured state higher than the atmospheric pressure.

Abstract: A desuperheater for reducing the superheated state of steam located within a cylindrically-shaped conduit. The desuperheater injects water droplets counter to the direction of moving superheated steam within the conduit. Downstream of the water droplet outlet is a biscuit which is aligned along the longitudinal axis of the conduit to provide a series of separate mixing elements all inducing the same rotational sign to fluids passing therethrough.

Abstract: An apparatus for conducting aqueous liquid media includes a plurality of static mixers, a gas distributor assembly with a plurality of nozzles, at least one impeller having blades attached thereto and a plurality of static mixer assemblies having flow guide elbows and collectors. The static mixer assemblies are independently and separately mounted to orient to the current leaving the blade tips of the impeller. Swirlers are also described as being utilized in place of the static mixers.

Abstract: A mixing device for fluids, comprising a column within which there is an internal core, a space between the column and core defining a channel for the flow of the fluids, the surface of the column facing the core having fluid guide elements which impart helical flow in a first twist direction upon a fluid flowing along the channel, the surface of the core having fluid guide elements thereon which impart helical flow in an opposite twist direction upon the fluid. On part of the channel, the helical flow imparted to the fluid is predominantly in the twist direction of the elements on the core and on a part of the channel upstream or downstream of this part the helical flow imparted to the fluid is predominantly in the twist direction of the elements on the column.

Abstract: The present invention is to provide a gas-liquid processing apparatus having a high contact efficiency of a gas and a liquid and a high reaction efficiency at a low production cost. A static type fluid mixer includes a passage pipe for the passage of a fluid and a spiral blade body arranged in the passage pipe with the longitudinal direction substantially perpendicularly but being absent in the center portion of the passage pipe. A liquid and a gas are supplied into the static type fluid mixer and a fluid is returned from the bottom portion of the static type fluid mixer to the upper portion via the pipe for the fluid circulation. The fluid is maintained in the static type fluid mixer at a pressured state higher than the atmospheric pressure.

Abstract: A fluid mixing device includes a plurality of axially extending blades disposed at intervals along an angular direction. Each of the blades includes a plurality of helically twisted guide sections and a plurality of impact bearing sections connected to and spaced apart axially by the twisted guide sections. The impact bearing sections of each of the blades are aligned circumferentially with the twisted guide sections of an adjacent one of the blades. Each of the twisted guide sections has a twisted surface. The impact bearing sections of each of the blades have flat surfaces which face the twisted surfaces of the adjacent one of the blades along a circumferential direction.

Abstract: A mixer for a multi-component dispensing cartridge having at least two storage cylinders. The mixer includes an inlet section (4) and a mixer housing (2) having a mixer element group (3). The inlet section includes side by side separate inlets (4A, 4B) that terminate at an end plate (20) and which are adapted to connect with the storage cylinders. The mixer housing includes an internal face (21) that is parallel with the top surface (19) of the end plate to define a merging chamber (23) therebetween. The components flow from the inlets in a direction parallel to the top surface of the end plate forcing them to premix within the merging chamber before reaching the dividing edge (8) of the first mixer element. The merging chamber can also include a separating ridge (17) dividing the inlet openings (20A, 20B) and a U-shaped baffle (16).

Abstract: A heat exchanging device is disclosed. The device includes a fluid flow tube having a turbulator which includes a plurality of coil sections. Each of the coil sections includes a number of coil members of uniform diameter. The coil sections are spaced apart by a predetermined number of other coil members having smaller diameters and different heights than the coil members in the coil sections. These coil configurations force fluid flowing around them into heat exchanging contact with the tube walls.

Abstract: A device for enhancing the mixing and uniform distribution of fluids within a conduit. The device includes a core pipe which can optionally receive a first fluid and series of helically wound vanes wrapped about the core pipe employing the core pipe as a mandrel. Fluids entering the conduit are mixed by virtue of passing over and about the helically wound vanes while heat transfer can be effected by heat passing between the mandrel and the fluid passing over the vanes. Ideally, the vanes are wrapped about the mandrel at an angle of approximately 45.degree. thereto and adjacent layers of vanes are wrapped about the mandrel at opposite signs so that interstices are ideally created between vanes of approximately 90.degree..

Abstract: Fluid mixing methods and systems are disclosed. In but one implementation, a fluid mixing method includes providing a mixing passageway having a mixing element therein. A fluid to be mixed is passed in both of opposing directions through at least a portion of the mixing passageway to mix said fluid. In one aspect, at least one fluid reservoir is provided having a mixing passageway connected in fluid communication therewith. Preferably, two fluid reservoirs are provided, with the mixing passageway extending therebetween. A fluid to be mixed is provided in at least one reservoir. At least some of the fluid from the fluid reservoir is flowed into the mixing passageway in a flow direction. After flowing fluid into the mixing passageway, at least some of the fluid within the mixing passageway is flowed in a reversed flow direction and from the mixing passageway back into the fluid reservoir.

Abstract: A stationary material mixing apparatus for mixing various components in a fluid stream. The mixing apparatus is in the form of a cone-shaped module containing a plurality of openings therethrough where within the openings are located mixing elements which induce a rotational angular velocity to the fluid stream. As preferred embodiments, the mixing apparatus, located within a conduit, can also contain a biscuit with further mixing elements and a series of either helically wound tubes or vanes further enhancing the mixing operation.

Abstract: The present invention is to provide a gas-liquid processing apparatus having a high contact efficiency of a gas and a liquid and a high reaction efficiency at a low production cost. A static type fluid mixer, includes a passage pipe for the passage of a fluid and a spiral blade body arranged in the passage pipe with the longitudinal direction substantially perpendicularly but being absent in the center portion of the passage pipe. A liquid and a gas are supplied into the static type fluid mixer and a fluid is returned from the bottom portion of the static type fluid mixer to the upper portion via the pipe for the fluid circulation. The fluid is maintained in the static type fluid mixer at a pressured state higher than the atmospheric pressure.

Abstract: A device for fining bubbles of gas contained in liquid includes at least two flow channel members confronting each other to form a flow channel therebetween. An inlet and an outlet are provided on one side and the other side of the flow channel members. A recess surface including a first recess and a second recess is formed on at least one of confronting surfaces of the flow channel members. The first recess and the second recess extend from the inlet to the outlet, respectively, and intersect each other at plural positions where the flow of the liquid premixed with gas in the first recess collides with that in the second recess.

Abstract: A compact assembly for mixing two or more fluids comprising a housing having interior serpentine flow channels. The channels are defined by alternating upward and downward extending partitions. The tip end of each partition is offset from respective interior surfaces of the housing top and bottom walls. Each offset defines a curved passage which interconnects the channels and forms a continuous zigzag flow path through the housing. Fitted within the channels are preformed static mixing units to provide additional mixing action.

Abstract: A dispensing device and disposable mixer for a plurality of fluids is provided in a combination in which the dispenser stores the fluids separately and delivers them to an orifice in which the fluids are maintained in separation to the point of interface between the orifice and the disposable mixer with .?.means.!. .Iadd.an arrangement .Iaddend.in the inlet end of the mixer having low resistance to the flow of the fluids for preventing cross contamination between the fluids and optionally provided with .?.means.!. .Iadd.an arrangement .Iaddend.at the inlet end of the mixer for both enhancing the mixing action downstream and for maintaining the integrity and separation between the fluids.