Abstract: A device dispenses serum onto the skin of a user and also provides a massage effect. The device comprises a hand-held housing and at least two massage head assemblies. A powered drive is mounted by or in the housing and is operatively coupled to the massage heads to cause them to execute a massage motion. The device has at least one serum dispensing outlet and a pump mechanism, comprising a piston and a cylinder, arranged to draw serum from a reservoir and to dispense it through the dispensing outlet. A user-actuatable member is movably mounted upon the housing and operatively coupled to the piston, so that via the user-actuatable member, the user can move the piston to cause a dose of serum to be dispensed.

Abstract: A fluid dispenser useful in methods and apparatuses for automated biological reaction systems including a barrel, a coupler, a piston associated with the barrel, and a sealing surface that seals the inner diameter against fluid flow at the lower extent of the piston.

Abstract: The present invention relates to a stable, aqueous wrinkle controlling and, optionally, odor-absorbing, composition, preferably for use on fabric. The composition preferably comprises fabric lubricant, shape retention polymer, lithium salts, and/or plasticizers for wrinkle control and, optionally, from about 0.1% to about 20%, by weight of the composition, of solubilized, water-soluble, uncomplexed cyclodextrin. Optionally, the composition can contain low molecular weight polyols; metallic salts to help control odor; nonionic surfactants to improve performance and formulatability, a humectant, etc. The composition is essentially free of any material that would soil or stain fabric. The composition is preferably applied as small particle size droplets, especially from spray containers which preferably are in association with instructions for use, especially when the composition comprises only water and perfume.

Abstract: The present invention relates generally to an apparatus for small particle and nanoparticle synthesis. A durable particle generator capable of high temperature particle synthesis is disclosed. The particle generator is configured as to minimize susceptor degradation associated with harsh reaction conditions.

Abstract: The inductor assembly of the present invention is configured with an agricultural implement to enhance conveyance of product from a storage hopper to a remote location. The inductor assembly includes an inductor chamber that defines an interior cavity configured to receive the supply of product from the storage hopper, an inlet tube configured to direct the stream of pressurized air so as to generate a combined stream of pressurized air and product, and an outlet tube configured to pass the combined stream of pressurized air and product from the inductor chamber to a distribution system application of the product in an agricultural environment. The improved inductor assembly can further include a selectively extendable outlet tube assembly, a trajectory control assembly coupled to the inlet tube, and an adjustable cover assembly configured to regulate agitation of the product and to purge deposits downstream of the inductor assembly.

Abstract: A hose-end sprayer assembly connectable to at least one container of product to be dispensed has an elongated housing for a venturi tube assembly rotatable about its central axis and devised to selectively open and close a product inlet opening as well as its associated vent valve, an independently controllable liquid carrier valve being provided for opening and closing the carrier liquid flow through the venturi tube duct in the venturi tube assembly can be devised for opening and closing inlet product inlet openings of separately stored chemical products sequentially or simultaneously.

Abstract: A feed bag includes a body bounding a compartment, the compartment being adapted to hold a feed material. The body has a first end with an outlet formed thereat and an opposing second end. A vent port is formed on the body so as to communicate with the compartment. In one embodiment a filter is coupled with the vent port. A fluid port is formed on the body so as to communicate with the compartment. The fluid port is adapted to receive a fluid line for delivering a fluid into the compartment of the body.

Abstract: A method and apparatus is provided to simplify sandblasting processes while increasing applied coverage areas in sandblasting operations. The method and apparatus provide a manifold assembly having a plurality of nozzles and that is rigidly attached to an air supply. The manifold is supplied with abrasive material via a plurality of angularly attached sand supply hoses which are coupled to an abrasive material supply. The manifold assembly is pressurized with the supply of air. An article is sandblasted by drawing sand through the hoses and out of the plurality of nozzles using the pressurized air through the manifold assembly.

Abstract: A method and apparatus is provided to simplify sandblasting processes while increasing applied coverage areas in sandblasting operations. The method and apparatus provide a manifold assembly having a plurality of nozzles and that is rigidly attached to an air supply. The manifold is supplied with abrasive material via a plurality of angularly attached sand supply hoses which are coupled to an abrasive material supply. The manifold assembly is pressurized with the supply of air. An article is sandblasted by drawing sand through the hoses and out of the plurality of nozzles using the pressurized air through the manifold assembly.

Abstract: An apparatus attachable to a bag containing a bulk particulate material and having a discharge spout for dispensing material from the bag generally consisting of first and second annular clamping members displaceable axially between a first, spaced apart condition permitting a portion of the spout to be drawn in position therebetween, and a second, adjacent condition clamping the spout portion position therebetween, and means for releasably retaining the members in the clamping condition.

Abstract: An apparatus is provided for testing equipment located in a local environment by presenting a detectable indicator gas therein. The apparatus has a container portion, a chemical substance stored in the container portion, a pump operable to draw air into the container portion and in contact with the chemical substance to generate a detectable indicator gas, and an outlet to the container for directing the indicator gas into the local environment. Further, the pump is integrally formed as one piece with the container portion. Preferably, the pump is a manually squeezable polymeric bulb that is joined (e.g., by molding) seamlessly with the container portion.

Abstract: An internal gear set comprising an inner rotor having a number of radially projecting cylindrical tooth members engaging a conjugate internally toothed outer rotor. The latter has one more tooth than there are tooth members on the inner rotor and is mounted eccentrically to the inner rotor so that the rotors move conjugately relative to one other.

Abstract: A gas powered spraying device that can be used for single or multi-part reactive medical polymer compositions is provided. A fluid or one or more reactive solutions are sprayed independently at a tissue surface, and the spraying of each solution of multi-component embodiments is controlled by a separate valve. Each solution is provided with a separate spray outlet, and each spray outlet is surrounded by an annular sheath of flowing gas. Gas flow is provided at two or more flow levels, including a high level flow for active spraying and a low level bypass flow to remove drips and prevent clogging, which can improve device reliability. Gas pressure can be used to drive fluid to its spray outlet, as well as to spray the fluid from the outlet to the tissue surface.

Abstract: An injector dispenser comprises a chamber (1) with two main sections (1a, 1b) of different diameter inside wich moves a primary piston (3) with zones (3a, 3b) of different diameter, with the piston body (3) being traversed by a slide (17), provided moreover with a secondary cylinder (12) and magnetic device of positioning and locking of driven flow that act as a stop on the slide (17), that includes inside it a pair of discs (18, 19) situated at the ends. A pump is achieved with a less complex structure and greater precision in the dispensing of the liquids to be supplied and using less energy.

Abstract: A fluid dispenser for dispensing fluid in liquid or powder form, the fluid dispenser comprising a fluid reservoir (30) of variable volume, said reservoir defining at least one movable wall (31, 32) that can be moved to vary the volume of the reservoir, the dispenser further comprising a dispensing orifice (311) in communication with the reservoir so that fluid from the reservoir can be delivered through the dispensing orifice when the volume of the reservoir is reduced;

Abstract: A system for separating an aqueous stream of mixed polynucleotides into a series of length-based polynucleotide fractions and collecting one or more of the length-based polynucleotide fractions into separate containers. The system comprises a separation column containing separation media for separating an aqueous stream of mixed polynucleotides into a series of length-based polynucleotide fractions; a container including one or more single-sample containers; an ejection chamber having a separated sample inlet for receiving the length-based polynucleotide fractions, a waste outlet for discharging uncollected sample, and a capillary-sized fraction outlet positioned to discharge a selected length-based polynucleotide fraction into a single-sample container. The system also includes means for effecting discharge of a selected length-based polynucleotide fraction into the separate container.

Abstract: Embodiments of the present invention are directed to a fluid dispenser for dispensing landscape maintenance fluids or the like which contain products such as fertilizers, herbicides, and pesticides. The fluid dispenser injects the fluids directly into the mainstream of an irrigation system. The dispensing system operates by shunting a portion of the main irrigation water stream through a bypass to the dispenser containing the product to be dispensed. The water dilutes the product to be applied, and is injected back into the main irrigation stream by the back pressure of the irrigation system. When the irrigation is completed, the fluid flow in the main irrigation stream is reduced or terminated and the pressure drops. After the pressure drops, the fluid ceases to be diverted to the container, and the main irrigation stream drains.

Abstract: The invention relates to a single-component or multiple-component polyelectrolyte cement containing at least two reaction partners: (a) at least one metal-cation-releasing compound and (b) one or more polyelectrolytes capable of being converted into a solid state, wherein at least one of the polyelectrolytes is at least partially water soluble, and wherein at least a part of the reaction partner (a) and/or (b) is coated with an organic surface-coating agent. In one preferred embodiment, at least one part of the formulation constituents of the cement is present in granulated form, wherein at least a part of the reaction partner (b) serves as an essential granulation agent. The polyelectrolyte cement is particularly stable in storage and can be easily mixed.

Abstract: A device for dispensing a fluid product includes a reservoir configured to contain a fluid product and a spray orifice associated with the reservoir. The reservoir may include at least one actuating zone having a predetermined threshold resistance to deformation. The actuating zone may be configured to deform in response to pressure exerted on the actuating zone so as to cause the product to be sprayed out from the orifice. When pressure exerted on the actuating zone is less than a threshold pressure Ps sufficient to overcome the predetermined threshold resistance to deformation of the actuating zone, substantially no portion of the product is sprayed from the spray orifice. Actuating zone deformation resulting from exertion of at least the threshold pressure Ps on the actuating zone may persist when the pressure exerted ceases.

Abstract: Disclosed is a mixer comprising a receptacle, a support, a gas tube and a shaker. The receptacle defines a chamber including a lower portion for receiving a supply of particulate material and an upper portion contiguous with the lower portion. The receptacle has an inlet formed therethrough contiguous with the lower portion and an outlet formed therethrough contiguous with the upper portion. A support is provided, for supporting the receptacle for vibratory movement. A gas tube delivers a flow of gas to the inlet. A shaker is connected to the receptacle to effect said vibratory movement in a manner sufficiently vigorous to create a dispersion of said particulate material through which gas delivered to the inlet can diffuse to the outlet, at least a portion of said dispersion being fluidized so as to issue, with said gas, through the outlet as a flow of gas having particulate material entrained therewithin.

Abstract: The present invention provides a fluidized bed for dispensing small quantities of powders. The fluidized bed is made using a porous housing to permit injection and removal of fluid through the surrounding walls to improve the operation of the bed particularly for small particles of the group C size, including significantly reducing powder adhesion to the walls. In one aspect of the invention the fluidized bed housing is rotated about its longitudinal axis, which may be oriented at any suitable angle. A system for changing the volume of the bed is described as is a system for incorporating injection nozzles within the bed for constant agitation and prevention of powder adhering to the walls of the housing.

Abstract: A particulate distribution apparatus for receiving seed or other particulate from a pneumatic source and temporarily storing the seed for subsequent use by a metering device where the particulate is characterized by a particulate size, the apparatus comprising a housing including walls that form a cavity, a hopper inlet linkable to the duct outlet and a hopper outlet linkable to the metering device inlet, at least one of the housing walls forming vent apertures that are generally smaller than the particulate size.

Abstract: A discharge apparatus for connection to and covering an airlock material outlet. The discharge apparatus includes an air inlet for at least substantially directing an airstream through an airlock material outlet and toward an interior area defined by an airlock. The discharge apparatus further includes a material directing trough for receiving an airstream and bulk material entrained therein from the airlock. The discharge apparatus also includes an extension member adapted to at least partially define a path of an airstream.

Abstract: A dispenser device is provided for dispensing a fluid substance in spray form. The dispenser device comprising a reservoir containing the fluid to be dispensed and a spray orifice. The reservoir includes at least one actuating wall that can be deformed by applying a pressing force.

Abstract: A liquid crystal dispensing apparatus and a method of controlling a liquid crystal dropping amount are provided to drop liquid crystal onto a substrate corresponding to at least one unit panel area. In one aspect, the apparatus uses a liquid crystal dispensing unit to dispense liquid crystal. The liquid crystal dispensing unit includes a nozzle having a discharging hole through which the liquid crystal is dropped onto the substrate, a needle moveable between a down position in which the needle blocks the discharging hole and an up position in which the needle is separated from the discharging hole, a spring member to bias the needle toward the down position, and a solenoid coil to provide a magnetic force to move the needle to the up position. The dropping amount liquid crystal dispensing unit may be electrically controlled by controlling the solenoid coil or by controlling a gas pressure used to drive the liquid crystal through the discharging hole.

Abstract: An improved submerged entry nozzle is provided which is useful in the casting of aluminum killed molten steel. The nozzle has an improved slagline sleeve or collar which surrounds the outer portion of the nozzle to protect it from corrosion during the casting process. The slagline sleeve is made from resin bonded zirconia/graphite which has been formulated so that upon curing of the resin to form resite, there is a reduction in the contractile tendency which results in a reduction in stress fracturing. The reduction of the contractile tendency and the resulting resistance to stress fracturing is achieved by adding an effective amount of calcium oxide to the resin-zirconia-graphite mixture which is used to form the sleeve.

Abstract: A feeder that uses a local elevation or stationary wave of a body of water to facilitate the dissolving of a chlorine-containing water treatment chemical.

Abstract: A metering device for releasing water and detergent has a three-way connector, a water quantity adjustment device, a detergent quantity adjustment device, and a detergent bottle. The three-way connector has a three-way channel, a first end connected to the detergent quantity adjustment device, a second end connected to the water quantity adjustment device, and a third end connected to a water outlet hose. The water quantity adjustment device has a swivel ring and a water amount control ring engaging with the swivel ring. The detergent quantity adjustment device has a rotating ring and a detergent amount control ring engaging with the rotating ring. The detergent bottle engages with the detergent amount control ring.

Abstract: When chemical substances are pipetted in individual microwells of a microwell array (4), problematic evaporation effects arise concerning the solvent with which the microwells are already filled. In order to prevent such undesired evaporation effects, a pipetting device for the automated pipetting of chemical substances having a holder (3), which receives at least one microwell array (4), and a pipetting head (11), which is fitted in such a way that it can be moved, is designed with the pipetting head (11) being fastened, by means of a holding device, to a plate (7) which follows the movements of the pipetting head (11) during the pipetting process. The plate (7) forms above the microwell array (4), in conjunction with a frame (5) tightly enclosing the microwell array (4), a sealed gas space (14) into which the pipetting head (11) protrudes through a matched hole (13) in the plate (7).

Abstract: A dispenser device for dispensing a fluid substance in spray form, said device comprising a reservoir (13) containing the fluid substance to be dispensed, and a spray orifice (16), said reservoir (13) including at least one actuating wall (131) that can be deformed by applying a pressing force (F) so as to reduce the internal volume of the reservoir (13) and thus to exert a pressure on the fluid substance so as to deliver it through the spray orifice (16), said dispenser device being characterized in that said at least one actuating wall (131) has a predetermined threshold of resistance to deformation that must be overcome in order to deform it.

Abstract: (57) Abstract: A compressed air discharge device (1) having an inlet (6) for entry of air into the device (1) and an outlet (8) for discharge of air from the device (1). First, second, third and fourth passages (10, 12, 14, 16) are provided for flow of air. A first valve (18) controls flow of air from the first passage (10) to the third passage (14). A second valve (20) controls passage of air from the third passage (14) to the fourth passage (16). T he first passage (10) is provided between the inlet (6) and the first valve (18). The third passage (14) is provided between the first and second valves (18, 20). The fourth passage (16) is provided between the second valve (20) and the outlet (8). A trigger (36) operates the first valve (18) to allow air to flow therethrough into the second and third passages (12, 14). The second passage (12) is arranged so that air is able to enter the second passage (12) upon the first valve (18) being opened.

Abstract: A dispenser device is provided for dispensing a fluid substance in spray form. The dispenser device comprises a reservoir containing the fluid to be dispensed and a spray orifice. The reservoir includes at least one actuating wall that can be deformed by applying a pressing force.

Abstract: An apparatus and a method for dispersing and feeding dry powders without using pressurized air are disclosed. The apparatus comprises a sample holder, a suction probe, a vacuum means and a positional means. The suction probe is positioned above dry powders in the sample holder, a space between the suction probe and the sample holder is substantially small that allows non-pressurized ambient air to form an high velocity downward air flow when a vacuum is applied to the suction probe. A change of air flow direction at an orifice of the suction probe generates a high shear force above the dry powders, which disperses the dry powders into an airstream. The apparatus feeds the dry powder airstream to a particle analyzer with a controlled rate. The apparatus and method are particularly useful in sizing particles using laser diffraction or image analysis techniques.

Abstract: A spray container device for a fluid product is disclosed. The device includes a container having at least one compressible wall. A first end of the container delimits a first opening for filling the container with a fluid product. The first opening is sealed after filling of the container. A second end of the container is closed and is capable, prior to the first use of the device, of being opened so as to uncover a second opening through which the product can be dispensed. The device further includes an insert arranged inside of the container. The insert delimits a spray orifice in communication with the product. The spray orifice faces the second opening. The insert is also preferably configured to isolate the product from the first opening prior to the sealing thereof.

Abstract: The present invention provides an oral medicine dispenser for the administration of a single pre-measured dose, which dispenser comprises a body having a collapsible reservoir portion and an elongate dispensing tube portion extending from the reservoir portion, wherein the reservoir portion holds, in use, a single dose of a fluid oral medicament and the dispensing tube portion has an end cap, whereby on opening of the end cap the collapsible reservoir portion may be manually squeezed to collapse the reservoir portion sufficiently to dispense substantially all of, or at least a major part of the medicament dose through the dispensing tube portion.

Abstract: An improved submerged entry nozzle is provided which is useful in the casting of aluminum killed molten steel. The nozzle has an improved slagline sleeve or collar which surrounds the outer portion of the nozzle to protect it from corrosion during the casting process. The slagline sleeve is made from resin bonded zirconia/graphite which has been formulated so that upon curing of the resin to form resite, there is a reduction in the contractile tendency which results in a reduction in stress fracturing. The reduction of the contractile tendency and the resulting resistance to stress fracturing is achieved by adding an effective amount of calcium oxide to the resin-zirconia-graphite mixture which is used to form the sleeve.

Abstract: A process for introducing a solid catalyst particle feed into a fluidised or agitated vessel utilising a feed delivery device, a vertical feed dilution pipe and a feed injection pipe connected to the vessel, the process including the steps of: (a) introducing the solid catalyst particles feed from the feed delivery device into the vertical feed dilution pipe, (b) diluting the solid catalyst particles feed by letting the solid particle reaching by gravity their terminal velocity in the feed dilution pipe, (c) introducing the diluted solid catalyst particles feed into the injection pipe and mixing it with conveying gas, and introducing the gas conveyed diluted solid catalyst particles feed into the vessel.

Abstract: A closure for a beverage receptacle is provided with a selectively operable dispense feature. A plurality of hollow plungers containing different additives are disposed in the closure and are selectively operable to pierce a rupturable seal, permitting contents to be dispensed into the receptacle.

Abstract: Valve for the periodic and cyclic or otherwise intermittent release of a fluid is described along with an irrigation sprinkler incorporating the valve. The valve opens when a critical pressure level is reached in a reservoir attached to the valve, thereby permitting a portion of the fluid contained within the reservoir to be released through the valve. As the fluid is released, the pressure in the reservoir decreases. The valve does not close until the pressure level in the reservoir reaches a second pressure level that is below the critical pressure level. When the reservoir is refilled from a pressurized source at a controlled rate that is less the rate at which the fluid is expelled through the valve when open, the valve will cycle repetitively.

Abstract: A dispensing apparatus for a liquid which relies on moulded components capable of being interchanged to provide, in addition to incremental adjustment within a range of dosages allowed by stroke limiting rotational adjustment of the relativity of escarpment and abutment members, the change of one or both the spread of the dosage range and at least one limit of the range.

Abstract: A clean detergent device includes a tube for connecting with a mophead and a tank containing the clean detergent attached to the tube. A first aperture is defined radially through the tube and communicates with the tank in which a piston is movably received. A second aperture is defined in communication with the tank and the tube. A connection member extends through the tank and a valve is received in the connection member. A hole is defined through the connection member and communicates with the tank. The valve controls the hole to allow detergent to flow into the tube via the second aperture.

Abstract: The invention provides a pressurized container for providing insulating foams including a foamable composition adapted for delivery from pressure cans and on the basis of an aqueous plastic dispersion, which comprises an aqueous dispersion of at least one film forming plastic with a content of 30 to 80% by weight of film forming aqueous plastic dispersion, a blowing gas in an amount equal to 3 to 25% of the weight of the total composition, and at least one anionic foam stabilizer for stabilizing the foams and emulsifying the blowing gas in the aqueous plastic dispersion in an amount equal to 0.3 to 6% of the weight of the total composition. The foamed compositions are able to be employed as sealing, caulking and insulating materials.

Abstract: Apparatus and method for the formation and application of small drops of liquid to a workpiece at a predetermined location thereon. The apparatus includes a machine vision system including a computer operable to view the drop as it is being formed and calculate a value indicative of the drop volume and control formation of the drop using the value. Application of the drop to the workpiece is also monitored and controlled by the machine vision system. The method and apparatus are particularly suited for use in the application of very small drops having actual volumes of less than about 30 nanoliters.

Abstract: A cannula for vaginal irrigations includes a straight cylindrical duct (1) whose proximal end is shaped to form a connection (4) for the mounting on a supplying device (5) containing a treating solution, as well as an ogive (2) extending rearwards from the distal end of said duct (1) so as to enclose externally the distal portion of the duct (1), whose distal end is in communication with the outside through a ring of at least four holes (3) formed on the tip of the ogive (2). The ogive (2) has an elliptical shape both in the longitudinal plane and in the plane orthogonal to the longitudinal axis and extends almost to mid-length of the duct (1), while the holes (3) are inclined at 30° with respect to the axis of the duct (1) both in the sagittal plane and in the longitudinal plane orthogonal thereto. The anatomical shape of the ogive (2) and the arrangement of the holes (3) provide an irrigation which is correct, effective and without risks for the user.

Abstract: A material feed system and method for conveying a metered quantity of lightweight, friable mesh fibers without minimal damage to the mesh fibers to concrete and like materials mixing tank. The material feed system including a hopper with a spiral fiber guide near the discharge and flexible blades for clearing fibers from the upper and lower surfaces of the spiral fiber guide. A drive assembly is included for rotating the hopper at a rotation rate adequate to move and agitate the mesh fibers to facilitate flow of the mesh fibers first outward against the side walls of the bin and then rapidly downward through the bin being guided by the spiral fiber guide.

Abstract: A new class of precision powder feeders is disclosed. These feeders provide a precision flow of a wide range of powdered materials, while remaining robust against jamming or damage. These feeders can be precisely controlled by feedback mechanisms.

Abstract: A sudser unit having an entry port, discharge port, and a fluid conduit. The discharge port and fluid conduit extend along a common longitudinal axis, and the entry port extends along a longitudinal axis that intersects the longitudinal axis of the discharge port and fluid conduit at an oblique angle. A water supply, such as a hose, is operably connected to the entry port. A converging nozzle having an opening of smaller diameter than that of the entry port is attached to the discharge port, and a detergent reservoir is attached to the fluid conduit. A valve is disposed between the reservoir and fluid conduit. A valve is disposed between the reservoir and fluid conduit to permit selective mixing of the water and detergent, and selective metering of the mixed composition.

Abstract: Liquid is supplied from a bottle B to a discharge outlet 8 via a moulded plastics reservoir 15 by pressurising the bottle using an air pump 22. A pressure sensor responds to a rise in air pressure supplied to the bottle by shutting off the pump. Liquid is removed from the reservoir through a dip tube 17 having a main outlet 18 adjacent to the bottom of the reservoir and a smaller auxiliary outlet 21 adjacent to the top of the reservoir. The upper region of the reservoir is received in a finned heat-conducting holder 16 provided with a thermoelectric cooling element. For hygienic purposes the bottle has a connector 12 which can be replaced together with the reservoir 15 and associated supply tubes 24, 13, 14, 17 and 19. A temperature-control mixer 51 may be to mix liquid from the reservoir with liquid from the bottle.

Abstract: An apparatus such as a glue gun system that utilizes solid beads of meltable material such as glue. The glue gun has a housing that contains a pervious barrier. The pervious diaphragm separates the beads from an airstream that is used to deliver the beads from a hopper to the housing. A load level control detects varying levels of the beads in the housing. A motor in the interior of the housing drives a feed screw. The feed screw forces the beads towards a nose assembly on the forward end of the housing. A heating element is provided in the nose assembly. A co-axial hose delivers the beads from a hopper to the housing through an interior passage. An exterior annulus of the hose delivers the separated airstream away from the housing. Electronics control the rotation of the feed screw and controls the power to the heating element. A hopper contains beads of the meltable material.

Abstract: The invention concerns powder spray coating equipment comprising an air divider (16) to adjustably divide a total-air flow (6, 14) into a conveying-air flow (54, 57, 70) and a supplemental-air flow (56, 84, 86) in such manner that, when adjusting for a larger flow of conveying air, the flow of supplemental air shall be reduced in a predetermined ratio, and vice versa; further comprising an injector (76) to aspirate and to pneumatically convey coating powder by means of the flow of conveying air; and a supplemental-air intake (89) into the air/powder path (76, 82). The conveying-air path (54, 57, 70) and the supplemental-air path (56, 84, 86) each are fitted with at least one throttling duct each constituted by at least one channel (40, 42) in a rotatable shaft (34, 36) and by a bearing surface (39) covering the channel.