Abstract: A rotary disc atomizer having a disc having an axis and rotatable about the axis, the disc also having two opposite surfaces as considered in an axial direction, and a peripheral edge, the disc having a plurality of throughgoing openings so that when a liquid is supplied to one of the surfaces and flows toward the edge and then droplets are sprayed, the liquid also flows through the throughgoing holes to another of the surfaces so as to also flow radially outwardly on the other surface and form droplets thrown from the edge in a region of the other surface.

Abstract: A rotational atomizer turbine of the present invention is designed to drive a bell-shaped disk in a rotational atomizer for a coating unit. The rotational atomizer turbine includes a housing, a rotatable turbine wheel with several turbine blades connected to a shaft and rotatably disposed in the housing. A plurality of nozzles are defined in the housing and are positioned relative the turbine wheel to drive fluid, i.e. gas onto the turbine blades. An intermediate chamber formed in the housing is fluidly communicated with and connected to the nozzles to hold gas therein. The intermediate chamber has a first inlet to supply gas. At least a second inlet is defined in the intermediate chamber for delivering gas into the intermediate chamber thereby increasing amount of gas therein to multiply a rotational speed of the rotatable turbine wheel as increased amount of gas is introduced to the turbine blades.

Abstract: A shower head having dual turbines. The shower head includes a body having an inlet for connection to a water conduit, a first outlet nozzle formed on the body, a second outlet nozzle formed on the body, a first turbine operably connected to the first outlet nozzle, and a second turbine operably connected to the second outlet nozzle. The shower head may include a flow actuation system taking the form of an actuator ring, a valve connected to the actuator ring and forming a flow channel, a first actuation point defined on the actuator ring, a second actuation point defined on the actuator ring, and a plunger situated within the flow channel. The plunger extends radially outwardly from a center of the valve when aligned with one of the first and second actuation points.

Abstract: A seal arrangement for a rotatable shaft that is secured at one end thereof in a housing, and that mounts a water distribution plate on an opposite end thereof, the shaft seal comprising a flexible annular member having a radially inner portion including at least one tapered lip extending in one direction along the shaft and adapted to engage the shaft, and a radially outer portion seated on a support in the housing; and at least one retainer overlying the seal and holding the seal in position on the support, the at least one retainer having a radially inner portion that substantially encloses the at least one tapered lip.

Abstract: A turbine assembly for use with a rotary atomizer rotates an atomizer bell for atomizing paint. A turbine housing is disposed within the rotary atomizer. A locking element is received by the turbine housing. A rotary shaft is rotatably supported within the turbine housing and has a distal end adapted to receive the atomizer bell. The distal end extends outwardly from the turbine housing. The rotary shaft has a proximal end adapted to receive the locking element. The locking element is moveable between a neutral position and a locking position for locking the rotary shaft in a non-rotatable position.

Abstract: An electrode ring suitable for providing electrostatic assistance to the high-speed rotary application of spray coatings and having electrode fingers comprising electrode tips, wherein the electrode ring is constructed so as to be capable of performing rotational movements about the axis directed through the center of the circle thereof.

Abstract: A device for transmitting a beam of material in particulate form for example for use as an atomized particle paint sprayer comprises an outer bell-shaped member which is rotatable about a principal axis and arranged to project a conical curtain of small particles flowing generally towards a target, a supply system for supplying material from a reservoir source to an internal shaping region of the outer bell-shaped member to create the conical curtain of small particles there being an inner rotary bells-shaped member which is provided coaxially with the outer bells-shaped member so that at least a major part of the material emerging from the supply system is subject to differing rotary forces imparted by both the inner and outer rotary bell-shaped members.

Abstract: The bowl according to the invention is provided with magnetic elements disposed around a male part which is adapted to be engaged in a central channel of a drive member, the magnetic elements forming outer radial flanges with respect to this male part. In the spraying device, the bowl is associated with a drive rotor, magnetic coupling means being provided which comprise magnetic bodies disposed on either side of at least one magnet borne by the rotor, while the bowl bears ribs formed in a magnetic material. The effort of magnetic coupling obtained has a radial component with respect to the axis of rotation of the bowl.

Abstract: A seal arrangement for a rotatable shaft that is secured at one end thereof in a housing, and that mounts a water distribution plate on an opposite end thereof, the shaft seal comprising a flexible annular member having a radially inner portion including at least one tapered lip extending in one direction along the shaft and adapted to engage the shaft, and a radially outer portion seated on a support in the housing; and at least one retainer overlying the seal and holding the seal in position on the support, the at least one retainer having a radially inner portion that substantially encloses the at least one tapered lip.

Abstract: A rotary atomizer applies particulate paints with good color matching by reducing paint droplet size deviation and then optimizing the other paint spraying parameters. Paint droplet size parameters are reduced by using a bell cup having reduced flow deviations, including an overflow surface having a generally constant angle between a deflector and an atomizing edge.

Abstract: Segmental outward projections (12) are provided at radially opposite positions on the circumference of a tubular mount portion (7) of a main body (5), and truncated side portions (13) are provided between and at the opposite sides of the segmental outward projection (12). On the other hand, D-Shaped inward projections (14) are projected radially inward from a boundary portion between fore and rear inner peripheral surface portions (10B) and (10C) of a shaping air ring (10) in such a way as to define an outward projection passageway (15) conforming in shape with the segmental outward projections (12). At the time of mounting the rotary atomizing head (4) on the rotational shaft (3), the outward projections (12) are put in a conforming angular position relative to the outward projection passageway (15) to pass the inward projections (14).

Abstract: In a coating device with a rotary atomizer, for preventing the condensation of spray cabin air on components cooled by the lower-pressure exhaust air of the drive turbine of the atomizer, a heating device is provided, which can heat air flowing through the atomizer or components in heat-conductive contact with the outlet path of the turbine exhaust air.

Abstract: In the embodiments described in the specification, a deck/hall extended coverage horizontal sprinkler arrangement has a sprinkler body with frame arms oriented in a vertical plane and a deflector mounted on the frame arms having semi-conical sections on opposite sides of the frame arms. The semi-conical sections are open in the direction toward the sprinkler orifice and include centrally located horizontal openings with vanes extending forwardly above the opening and top surfaces which are flattened and extend outwardly beyond the edges of the conical surfaces of the semi-conical sections.

Abstract: A hand-held device for applying a layer of fluid droplets on a target or subject is provided. The device includes a housing with a fluid reservoir. The device further includes an inlet port in the housing for receiving pressurized fluid. A rotatable brush roll in the housing includes a plurality of bristles. The brush roll is configured for rotation along an axis positioned to have a selected spatial relationship relative to an exit window in the housing. A conduit for delivering the pressurized fluid to the bristles in the brush roll is provided. At least one flipper element is positioned to contact the tips of the bristles extending over a corresponding section of the rotatable roll so that fluid collected therein is propelled through the exit window in the housing with a pattern at least in part based on the selected spatial relationship between the rotation axis of the brush roll and the exit window. An outlet port is provided for draining fluid that accumulates in the reservoir.

Abstract: A dispensing device for dispensing a material. The dispensing device includes a somewhat cup-shaped interior opening in a first direction in which the material is to be dispensed from the dispensing device. The interior terminates at a discharge edge. The dispensing device further includes a skirt extending from the discharge edge in a second direction generally opposite the first direction. The skirt includes multiple passageways substantially equally spaced around a perimeter of the skirt.

Abstract: A system for spraying a powder coating product includes a rotary sprayhead which is preferably of the type which is electrostatically charged. The sprayhead has a rotary part which can be driven in rotation. A narrow flow space in the sprayhead in the form of a flat ring incorporates a flow chicane forming an impact surface on the path of the coating product.

Abstract: Method and device for continuously producing a coherent layer of a liquid/melt of even thickness by means of centrifugal action along the entire periphery of a rotating disk (13, 113), liquid/melt being supplied to the disk around its entire axis of rotation from means (12, 112) and leaving the disk as individual droplets. The means (12, 112) distributing the liquid/melt onto the disk (13, 113) has according to the invention essentially the same speed and direction of rotation as the disk, and the liquid/melt undergoes under the influence of centrifugal action circumferentially a spreading and change in velocity across the disk (13, 113) in contact with the same.

Abstract: Apparatus for the electrostatic powder paint spray coating of substrates, such as automotive vehicles, is provided. The apparatus includes modular applicators which are mountable into a programmable, robotically controlled housing. The modular applicators are switchable into and out of an operational mode on command, to facilitate different optimal coating procedures for coating differing surfaces, ranging from large, open surfaces to smaller, highly irregular substrate surfaces. The applicator heads may be spatially switchable on command from, for example, a bell cup spray applicator to a spray gun applicator. Flow control to each applicator is preferably enhanced using selectable pneumatically controlled pinch valves.

Abstract: Segmental outward projections (12) are provided at radially opposite positions on the circumference of a tubular mount portion (7) of a main body (5), and truncated side portions (13) are provided between and at the opposite sides of the segmental outward projection (12). On the other hand, D-Shaped inward projections (14) are projected radially inward from a boundary portion between fore and rear inner peripheral surface portions (10B) and (10C) of a shaping air ring (10) in such a way as to define an outward projection passageway (15) conforming in shape with the segmental outward projections (12). At the time of mounting the rotary atomizing head (4) on the rotational shaft (3), the outward projections (12) are put in a conforming angular position relative to the outward projection passageway (15) to pass the inward projections (14).

Abstract: An aeroponic growing apparatus is provided which comprises a novel low pressure liquid nutrient delivery system generated by centrifugal force utilizing a rotating cylinder device. The rotating cylinder device distributes liquid nutrient solution to the roots of plants by use of centrifugal force, thereby eliminating the need for a high pressure pump and nozzles. The geometrical shape of the enclosed root growth chamber is such that it allows for fractionated droplets to ricochet in multiple random directions thus completely surrounding the plant roots in 360° in any plane.

Abstract: The invention provides a sprayer for spraying mold wall treatment agent or another liquid. The liquid is sprayed onto, for example, the walls of a mold or some other article. The sprayer includes a spray element body and a rotor mounted with freedom to rotate around an axis of rotation in the spray element body. An atomizing element is attached to one end of the rotor. A first feed line for mold wall treatment agent or another liquid to be sprayed is provided, as well as a second feed line for control air which directs mold wall treatment agent atomized by the atomizing element in the desired spray direction.

Abstract: A system utilizing a rotary atomizer for applying a liquid based substance to particles. In one example, a motor provides an in-line, direct drive force on a cage atomizer. With some systems, the cage atomizer has a vertical axis of rotation. With some systems, the motor is mounted external to the particle path and supported by a housing structure that provides an angled particle path. With some systems, other types of rotary atomizers may be used such as disk, bowl, or hollow disk rotary atomizers. With some examples of cage atomizers, a first portion of the cage atomizer may include a thread set that screws to a thread set of a second portion to hold a perforated structure in place. With some systems, the thread sets surround the axis of rotation.

Abstract: A turbine, e.g., with a blade arrangement, which receives an air flow in the radial direction and which is located on a carrier surface of the turbine wheel, is used as a drive motor for a rotary atomizer. The drive channel, which contains the turbine blades and which is limited by the carrier surface, is also closed on its other side by a cover element, which is attached to the turbine wheel and which rotates with the wheel for increasing efficiency. For an additional increase in efficiency, the inlet for the drive air of the turbine is configured as an ultrasonic nozzle with a cross section that expands continuously up to the opening.

Abstract: Fibers of improved quality can be produced with a reduced energy input in a device for producing synthetic materials which has a polymer melt feed leading to a rotating hollow reactor (1), the wall of which can be heated and which widens conically in order to guide a film melt towards an open side that can be closed with a lid (13), and which has ribs (4) for dividing the melt film into fibers that grow rigid after leaving the hollow reactor (1); and said improved quality can be achieved specifically in that the hollow reactor (1) is vertically oriented and exhibits a continuously curved inner wall and at the curved upper side exhibits an opening (3) for introducing the polymer melt, and in that a rotating distributor plate (12) is positioned opposite the opening (3), a slight distance from the inner wall of the hollow reactor (1).

Abstract: A paint cartridge is provided with a wash fluid passage in communication with a paint chamber, along with a wash fluid valve adapted to open and close the wash fluid passage. Provided on the side of a replenishing stool are a replenishing valve which supplies or discharges paint to or from the paint chamber, an extruding thinner feed/discharge valve which supplies or discharges paint-extruding thinner to or from an extruding thinner chamber, and a wash fluid supply valve which supplies a wash fluid to the paint chamber through the wash fluid passage. Accordingly, upon opening the replenishing valve, wash fluid supply valve and wash fluid valve, a wash fluid from the wash fluid supply valve is allowed to flow into the paint chamber through the wash fluid passage and discharged through a feed tube to wash away deposited paint therefrom.

Abstract: A device for spraying a liquid coating product includes a hub forming or accommodating a liquid feed pipe and a divergent centrifugal deflector having a distribution surface whose overall shape is that of a trumpet bell. Applications include electrostatic painting.

Abstract: A lid assembly for a rotatable atomizer wheel with an atomizing chamber therein for the receipt of a slurry through the lid assembly. The lid assembly includes a lid member with a first opening there through adapted to fit onto the rotatable atomizer wheel over the atomizing chamber. The lid assembly further includes a wear ring fitted inside and extending through the first opening through the lid member for protecting the exposed surface of the first opening through the lid member from wear caused by slurry flowing through the lid into the atomizing chamber.

Abstract: The present invention is a device for atomizing liquids which has: a) a rotatable apparatus for the reception of liquids to be atomized, the apparatus is defined by a cylinder having an interior chamber that runs the length of the cylinder with an internal diameter of about 10 to about 25 millimeters, the cylinder has an upper end with an opening into the interior chamber, which opening is adapted to receive liquids to be atomized, the cylinder has a closed lower end that terminates with a floor, the outer surface of the cylinder is defined by an outer casing having a plurality of circular hole-type nozzles extending up about 20 to about 120 millimeters from the lower end of the cylinder in an axial direction, the hole-type nozzles are in fluid communication with the interior chamber for introducing the liquid to be atomized into the nozzles; and b) a drive operably connected to the cylinder for rotating the hollow cylinder.

Abstract: The present invention pertains to an improved nozzle, particularly for use in wear-resistant rotary atomizers, to atomizer wheels containing such improved nozzles and to a method for obtaining microspherical particles with a narrower particle size distribution when using such nozzles. The atomizer wheels and nozzles have at least the same wear resistance as those described in the prior art, but have been improved to provide microspherical particles with a very narrow particle size distribution. The nozzle of the present invention comprises a flow channel in the shape of a vertical slot that may be lined with wear-resistant sintered material. The vertical slot may be uniformly rounded. It was found that when these improved nozzles are used for spray-drying suspensions, microspherical particles with a narrower particle size distribution are obtained than when using nozzles with cylindrical flow channels.

Abstract: A rotary atomizer applies particulate paints with good color matching by reducing paint droplet size deviation and then optimizing the other paint spraying parameters. Paint droplet size parameters are reduced by using a bell cup having reduced flow deviations, including an overflow surface having a generally constant angle between a deflector and an atomizing edge.

Abstract: A distribution plate for particulate material comprises a circular horizontal plate comprised of nylon. Spaced radial slots are cut in the plate and extend completely therethrough. A substantially rectangular fin is placed in each slot and is radially positioned in the slot for slidable movement to interconnect with interlocking surfaces between the slot and the bottom edge of the fin. The slots extend from an inner position to an outer radial position short of the outer periphery of the plate.

Abstract: A centrifugal humidifier having a rotatable body for propelling water outwardly on to an impingement surface that brake up the propelled water into droplets which are then entrained in a stream of air and discharged to the surroundings, wherein the impingement surface has a multiplicity of sawtooth ridges oriented with the more gradually inclined sides facing toward the direction from which the water is propelled by the rotatable body which promotes breaking up the water into finer droplets.

Abstract: This device comprises a rotating spray element, such as a bowl, and drive means, such as a rotor, adapted to drive said element in rotation. It further comprises means for magnetic coupling between the rotating element and the drive means. An air-gap is formed between the coupling means which advantageously include at least one magnet associated with a looping annulus. The magnet may be fitted on the rotor and/or on the bowl.

Abstract: A main body (12) of a rotary atomizing head is provided with a hub fitting groove (13) on and around an inner peripheral surface (12F), while a hub member (14) is provided with a lid portion (15) of a circular disc-like shape, a plural number of leg portions (17) to be brought into fitting engagement with he hub fitting groove (13) through resilient deformation, and notched grooves (18) provided between the respective leg portions (17). Upon pushing in the hub member (14) against the main body (12), the leg portions (17) are fitted into the hub fitting groove (13) and the hub member (14) is mounted in position on the main body (12). In this assembled state, channel-like paint passages (19) are formed between the hub fitting groove (13) and the notched grooves (18), and an annular paint passage (20) is formed between the inner peripheral surface (12F) and the lid portion (15).

Abstract: A system utilizing a rotary atomizer for applying a liquid based substance to particles. In one example, a motor provides an in-line, direct drive force on a cage atomizer. With some systems, the cage atomizer has a vertical axis of rotation. With some systems, the motor is mounted external to the particle path and supported by a housing structure that provides an angled particle path. With some systems, other types of rotary atomizers may be used such as disk, bowl, or hollow disk rotary atomizers. With some examples of cage atomizers, a first portion of the cage atomizer may include a thread set that screws to a thread set of a second portion to hold a perforated structure in place. With some systems, the thread sets surround the axis of rotation.

Abstract: An atomizer for coating materials is provided. The atomizer includes two opposing discs connected by a central hub. Each disc includes an inwardly extending flange about its perimeter. The central hub has an exterior surface defining a v-shaped surface. When assembled in a coating apparatus, a fluid material, such as batter, may be dispensed toward the exterior surface of the hub while the disc is spinning. The resulting spray of fluid may be used to coat material effectively, while minimizing waste.

Abstract: Mounted on a wrist portion (10) of a single coating robot (6) is a common main assembly body (11) to which a plural number of bell-shape heads (42, 81, 83) are replaceably connectible. Further, a head changer (61) is provided within a working area of the coating robot (6), the head changer (61) being provided with head gripping mechanisms (63) to hold a plural number of bell-shape heads (42, 81, 83) thereon. By the use of the coating robot (6), one of the bell-shape heads (42, 81, 83) on the head changer (61) is replaceably connected to the common main assembly body (11) to form a complete sprayer (55, 101). Accordingly, the coating robot (6) can perform various coating operations by selectively picking up a suitable bell-shape head (42, 81, 83) from the head changer (61) and connecting same to the common main assembly body (11).

Abstract: The subject invention is a Kick-Starter (KS) which can be readily adapted to a variety of sprinkler head designs to increase start up efficiency, as well as efficiency and uniformity of water distribution during operation of the sprinkler head. The Kick-Starter is incorporated into a sprinkler head comprising a sprinkler body with a water inlet disposed therein, a nozzle orifice in fluid connection with said water inlet, and a water deflecting pad movably attached to said sprinkler body. The Kick-Starter mechanism comprises a KS pass-through hole and a KS deflector in fluid connection with said pass-through hole.

Abstract: Method and device for continuously producing a coherent layer of a liquid/melt of even thickness by means of centrifugal action along the entire periphery of a rotating disk (13, 113), liquid/melt being supplied to the disk around its entire axis of rotation from means (12, 112) and leaving the disk as individual droplets. The means (12, 112) distributing the liquid/melt onto the disk (13, 113) has according to the invention essentially the same speed and direction of rotation as the disk, and the liquid/melt undergoes under the influence of centrifugal action circumferentially a spreading and change in velocity across the disk (13, 113) in contact with the same.

Abstract: A base compound supply passage and a hardener supply passage supply a base compound and a hardener, respectively, fed under pressure from first and second color changing valve mechanisms to a coating gun. The base compound supply passage and the hardener supply passage have respective first and second gear pumps, and first and second pressure control valves for controlling the base compound and the hardener to be supplied under given pressures to the first and second gear pumps. Two liquids, i.e., the base compound and the hardener, can be supplied reliably at desired rates to the coating gun, and mixed and discharged at a desired mixing ratio.

Abstract: An outlet nozzle for use within a centrifuge rotor. The outlet nozzle includes an axial inlet channel and an outlet channel disposed angularly with respect to the inlet channel. An insert is received within the holder and includes an orifice portion and a directing portion. The directing portion shields at least a portion of the outlet channel for preventing impact therewith and for diverting fluid flow from the inlet channel of the holder and into the orifice portion of the insert. The insert further includes an inlet edge at a proximal end which is defined by the intersection of the outlet channel and the inlet channel.

Abstract: Segmental outward projections (12) are provided at radially opposite positions on the circumference of a tubular mount portion (7) of a main body (5), and truncated side portions (13) are provided between and at the opposite sides of the segmental outward projection (12). On the other hand, D-Shaped inward projections (14) are projected radially inward from a boundary portion between fore and rear inner peripheral surface portions (10B) and (10C) of a shaping air ring (10) in such a way as to define an outward projection passageway (15) conforming in shape with the segmental outward projections (12). At the time of mounting the rotary atomizing head (4) on the rotational shaft (3), the outward projections (12) are put in a conforming angular position relative to the outward projection passageway (15) to pass the inward projections (14).

Abstract: A main body (12) of a rotary atomizing head is provided with a hub fitting groove (13) on and around an inner peripheral surface (12F), while a hub member (14) is provided with a lid portion (15) of a circular disc-like shape, a plural number of leg portions (17) to be brought into fitting engagement with the hub fitting groove (13) through resilient deformation, and notched grooves (18) provided between the respective leg portions (17). Upon pushing in the hub member (14) against the main body (12), the leg portions (17) are fitted into the hub fitting groove (13) and the hub member (14) is mounted in position on the main body (12). In this assembled state, channel-like paint passages (19) are formed between the hub fitting groove (13) and the notched grooves (18), and an annular paint passage (20) is formed between the inner peripheral surface (12F) and the lid portion (15).

Abstract: A high-speed rotary atomizer for applying powder coating comprises in a known manner a housing (1), in which a motor (13) is accommodated. The motor (13) rotates a bell-shaped plate (16) which is disposed at the front of the housing (1). At least one powder supply duct (28, 29, 22, 23, 24, 25, 11, 12, 9, 10) leads through the housing and opens at the front of the housing (1). Its cross section can therefore be kept very large, thereby increasing the powder output of the high-speed rotary atomizer. This also enables a plurality of powder supply ducts (28, 29, 22, 23, 24, 25, 11, 12, 9, 10) to be laid, which in turn results in a higher powder throughput and improved homogeneity of the powder cloud which is produced.

Abstract: An outlet nozzle for use within a centrifuge rotor. The outlet nozzle includes an axial inlet channel and an outlet channel disposed angularly with respect to the inlet channel. An insert is received within the holder and includes an orifice portion and a directing portion. The directing portion shields at least a portion of the outlet channel for preventing impact therewith and for diverting fluid flow from the inlet channel of the holder and into the orifice portion of the insert. The insert further includes an inlet edge at a proximal end which is defined by the intersection of the outlet channel and the inlet channel.

Abstract: The invention is an automated sprayer for spraying the walls of a bath and shower enclosure with a cleanser. The sprayer has a housing that can be mounted inside the shower enclosure and that defines a tray in which an inverted bottle of cleanser is stored. The bottom of the tray has a tube extending downwardly along a longitudinal axis through which the cleanser can pass. A motorized head disposed beneath the tube can be rotated about the axis for metering cleanser from the bottle and spraying cleanser outward. The sprayer includes timer circuitry that delays commencement of a spray for a set time and automatically stops spraying after a predetermined period. The sprayer also includes a system for signaling the beginning of a spray cycle including audio and visual alarms. An automated method of cleaning the shower enclosure is also disclosed.

Abstract: A nozzle and method for mixing abrasive particles with a stream of water and focusing the mixture of abrasive and water exiting the nozzle to improve the ability of the stream to remove paint and other coatings, rust, and scale and the like from a surface for use in operations such as metal finishing. The nozzle includes a spindle that rotates in a housing, the spindle including a chamber in which water passing through a passage in the spindle is mixed with abrasive particles. The passage through the spindle includes a section that is substantially coincident with the rotational axis of the spindle and a section that is angled relative to the section that is coincident with the rotational axis of the spindle, the mixing chamber being located in the off-axis section of and in fluid communication with the passage through the spindle.

Abstract: A wear resistance coated bell atomizer (32) and method for making same. The coating applied to the outer surface of a bell cup (36) of the bell atomizer (32) is preferably a silicon-doped amorphous carbon coating. This silicon-doped amorphous carbon coating significantly increases the usable life of a bell cup (36) in a bell atomizer paint system (10) by limiting the effects of abrasive materials on the wearable surfaces of the bell cup (26), including the top serrated edges (46), which may negatively affect the performance of uncoated bell atomizer spray equipment.

Abstract: A method for the controlled break-up of liquid jets for production of substantially monodispersed drops stands out for the fact that it comprises the steps of: feeding a plurality of first liquid jets (4) having stationary motion to a plurality of mutually independent sectors and defined in a perforated surface (8); forming a head of liquid (10) in said sectors (7) near said perforated surface (8); causing said liquid to flow across said perforated surface (8) to form a plurality of second liquid jets (6); periodically changing with a predetermined frequency the momentum of the liquid fed to a predetermined sector (7) so as to impart to the liquid present in said sector a disturbance of predetermined magnitude consisting of a periodic change in the pressure near said perforated surface (8) which is transmitted to the second liquid jets (6) causing their controlled break-up in a plurality of substantially monodispersed drops.

Abstract: A rotary bell cup for atomizing particulate material such as paint includes a generally conical overflow surface having a generally constant flow angle defining a radially inward central axial opening and a radially outward atomizing edge with a bevel. A central flat portion is disposed between the conical overflow surface and the radially inward central axial opening. A deflector having a deflection surface of generally rotational symmetry is disposed in front of the central opening having a rear flat surface generally parallel to the central portion and a rear conical surface generally parallel to the conical overflow surface.