Abstract: A pneumatic hood for a tissue—or papermaking machine is disclosed. The hood has an inlet to admit dust and air. The inlet is defined, in part, by an inlet flap that is hingedly connected to the body of the hood. The inlet flap is connected to one or more linear actuators, such as pneumatic cylinders, by a linkage such that the linear actuators drive the inlet flap between positions in which the inlet is wider and positions in which the inlet is narrower. Thus, the size of the inlet can be increased to clear large obstructions.

Abstract: An air halo assembly for a spray gun assembly is provided. The spray gun assembly includes a fluid supply assembly, an air supply assembly, and an air halo nozzle assembly. The air halo nozzle assembly includes a liquid nozzle assembly and an air halo assembly. The fluid supply assembly is coupled to, and is in fluid communication with, the liquid nozzle assembly. The air halo nozzle assembly is structured to produce a liquid flow stream having a longitudinal axis. The air halo assembly includes a body. The air halo assembly body defines a passage. The air halo assembly body passage includes an inlet and an air halo outlet. The air halo assembly body passage inlet is structured to be in fluid communication with the air supply assembly.

Abstract: The invention relates to a spray head having a slot-shaped central air outlet opening and preferably a slot-shaped paint nozzle for forming a flat jet of paint in an air-propelled application process.

Abstract: An attachment to be employed with any spray device is disclosed. The attachment includes four vanes which are radially attached to an air hub with a central aperture, the central aperture adapted to receive the front portion of the spray device therethrough which when activated dispenses an atomizable substance in a pattern toward a workpiece. At the distal end of each of the four vanes, the vane is angled forward such that it generally points toward the workpiece. At the terminal end of each vane is a plurality of compressed air exit apertures. A compressed air source is attached to the air hub which guides the air through air conduits interiorly disposed within each of the vanes, where the compressed air is forced to exit each of the compressed air exit apertures forming an a second pattern which surrounds the atomizable substance pattern, and further boosts or pushes the atomizable substance onto the workpiece.

Abstract: A method and a device for producing a thin article or a thin coating on a previously manufactured solid body. At least two reactive polymer materials are mixed together thoroughly and die resultant mixture is discharged via a nozzle in the form of a thin tube. This thin tube is pulverized or atomized by means of the introduction of a controlled flow of pressurized air with the result that die pulverized mixture may be sprayed onto an open mold or onto a surface or onto a previously manufactured solid body which is to be coated.

Abstract: An automated spraygun includes a spraygun body mounted on a feed foundation. The spraygun includes tensile locking elements between the spray body and the foundation.

Abstract: The invention is an alternative to a conventional atomizing coating apparatus. The apparatus and associated coating methodology of the invention provides a uniform atomized fluid stream, and, in turn, a uniform coating to an object on an industrial scale. The apparatus and methodology addresses many of the critical parameters associated with the conventional curtain and atomizing coating techniques, including but no limited to, uniform distribution, acoustical transparency, reduction or elimination of clogged nozzles, and elimination of the need for reciprocating nozzles.

Abstract: A system for dispensing liquid material with different configurations of air assisted fiberization or filament movement (e.g., meltblowing, controlled fiberization). In particular, front access for mounting a selected nozzle only requires adjustment of one lever and one fastener. Features of the lever and nozzle allow assisted ejection of the nozzle, even when the nozzle has become adhered to a die body through use. In addition, a nozzle mounting surface of the die body provides a universal interface to the various types of nozzles. An air cavity in the die body and air troughs in selected types of nozzles balance and adjust air flow.

Abstract: Systems and methods for producing ozonated water on demand. In particular, these systems comprise a water source, an ozone source, and a nozzle that mixes ozone and water to form a highly concentrated, ozonated water solution. Instead of requiring the ozonated water to be re-circulated to achieve a desired ozone concentration, the nozzle is configured to form the ozonated water solution in a single pass through the nozzle. Additionally, instead of requiring the ozonated water to be discharged into a pressurized tank to increase ozone absorption, the nozzle allows the ozonated water to be openly discharged. In some cases, the nozzle comprises a venturi with multiple ozone inlets to increase mixing. Additionally, in some cases the nozzle comprises a single pass mixing mechanism that mixes the water and ozone to form the high concentrate, ozonated water solution in a single pass through the nozzle.

Abstract: A nozzle for a viscous liquid dispensing apparatus has a nozzle tip with a generally conical outer surface that tapers toward a dispensing orifice and forms an annular discharge air passage substantially parallel to the conical outer surface. Pressurized fluid is directed over the conical outer surface toward the dispensing orifice and thus, prevents viscous liquid dispensed from the dispensing orifice from being pulled back toward the nozzle tip and accumulating on the conical outer surface of the nozzle tip.

Abstract: A nozzle is provided for use during a process for cold-dynamic gas spraying a powder material onto a bore surface. In one embodiment, and by way of example only, the nozzle includes a tube and a coating. The tube is configured to direct the powder material to the bore surface and has an inner surface, an axial section, a radial section, and a bend. At least a portion of the inner surface of the axial section defines a converging/diverging flowpath, and the axial section and the radial section are disposed at a predetermined angle relative to one another and include the bend disposed therebetween. The coating is disposed on at least a portion of the tube inner surface and comprises a material to which the powder material does not adhere.

Abstract: In accordance with certain embodiments, a spray coating device includes a body and a spray formation head coupled to the body. The spray formation head has a fluid delivery mechanism comprising a pintle, a sleeve disposed about the pintle, and a throat between the pintle and the sleeve, wherein the throat decreases in cross-section at least partially lengthwise through the fluid delivery mechanism toward a fluid exit between the pintle and the sleeve. The spray formation head also has a pneumatic atomization mechanism disposed adjacent the fluid delivery mechanism, wherein the pneumatic atomization mechanism comprises a plurality of pneumatic orifices.

Abstract: An apparatus for dispensing liquid material includes a dispensing module having a liquid supply passage communicating with a supply of liquid material and an air supply passage communicating with a source of pressurized air. A nozzle is coupled to the dispensing module and has a liquid discharge passage and an air discharge passage communicating with the liquid supply passage and the air supply passage, respectively. The liquid material is dispensed from a liquid discharge outlet of the nozzle and pressurized air is directed from an air outlet of the nozzle toward the dispensed liquid material. An air valve coupled to the nozzle is operable to vary the pressure of the air discharged from the air outlet to thereby move the liquid material in a desired pattern. In an exemplary embodiment, the valve is operable to pulse the pressurized air.

Abstract: In accordance with certain embodiments, a system includes a spray device having a liquid pathway leading to a liquid exit, an air pathway leading to an air exit directed toward a spray region downstream of the liquid exit, and an assembly disposed in the liquid pathway adjacent the liquid exit. The assembly includes a threadless pintle generally fit into a sleeve in a concentric manner without threads. The assembly also includes a generally annular passage between the threadless pintle and the sleeve and a passage coupled with the generally annular passage. The generally annular passage also has a cross-sectional area that alternatingly increases and decreases in a lengthwise direction along the liquid pathway.

Abstract: A nozzle for a viscous liquid dispensing apparatus has a nozzle tip with a generally conical outer surface that tapers toward a dispensing orifice and forms an annular discharge air passage substantially parallel to the conical outer surface. Pressurized fluid is directed over the conical outer surface toward the dispensing orifice and thus, prevents viscous liquid dispensed from the dispensing orifice from being pulled back toward the nozzle tip and accumulating on the conical outer surface of the nozzle tip.

Abstract: A system for dispensing liquid material with different configurations of air assisted fiberization or filament movement (e.g., meltblowing, controlled fiberization). In particular, front access for mounting a selected nozzle only requires adjustment of one lever and one fastener. Features of the lever and nozzle allow assisted ejection of the nozzle, even when the nozzle has become adhered to a die body through use. In addition, a nozzle mounting surface of the die body provides a universal interface to the various types of nozzles. An air cavity in the die body and air troughs in selected types of nozzles balance and adjust air flow.

Abstract: A spray apparatus for coating material, in particular for coating powders, contains a spray outlet spraying the coating material, a shaping air outlet in the form of a plurality of holes shaping the spray jet and an ambient-air passage radially configured between the spray outlet and the holes to aspirate ambient air by means of the flow suction effect of the spray jet and/or of the shaping air flow.

Abstract: A method for applying lotion to a surface of an absorbent article. The method includes the steps of: placing the surface of the absorbent article in the proximity of a spraying apparatus having a spray head with an orifice; pushing the lotion through the spray head orifice; and propelling the lotion to the surface as a continuous fiberised string. The invention also pertains to an absorbent article having a surface with an application of lotion.

Abstract: An apparatus (10) for dispensing a filament of liquid includes a nozzle (12) having a liquid discharge passage (46) and a plurality of air discharge passages (70, 72, 74, 76). The liquid discharge passage (46) extends centrally through a frustoconical protrusion (89) which is located in a recess (88). The air discharge passages (70, 72, 74, 76) are arranged in a pattern around the liquid discharge passage (46) at the base of the protrusion (89) within the recess (88). The air discharge passages (70, 72, 74, 76) have axes (70a, 72a, 74a, 76a) which are inclined such that jets of air from the air discharge passages (70, 72, 74, 76) are tangential to the filament (13) dispensed from the liquid discharge passage (46). The jets of air cause the filament (13) to move in a swirl pattern as it is deposited on a substrate (18).

Abstract: A system for dispensing liquid material with different configurations of air assisted fiberization or filament movement (e.g., meltblowing, controlled fiberization). In particular, front access for mounting a selected nozzle only requires adjustment of one lever and one fastener. Features of the lever and nozzle allow assisted ejection of the nozzle, even when the nozzle has become adhered to a die body through use. In addition, a nozzle mounting surface of the die body provides a universal interface to the various types of nozzles. An air cavity in the die body and air troughs in selected types of nozzles balance and adjust air flow.

Abstract: Atomizing nozzle for introducing a gas/liquid mixture into a chemical reformer to produce hydrogen, having at least one gas supply line (21) for a gas stream (20), at least one liquid supply line (25, 27) and at least one outlet (19) for the atomized gas/liquid mixture as well as a first chamber (24) into which the liquid supply line (25, 27) empties, with the chamber (24) having a chamber wall (16) that forms a lip (18) at the outlet end, on both sides of which a separate gas flow (20, 22) is supplied.

Abstract: Apparatus and methods for applying adhesive to one or more narrow substrates, such as elastic strands, that are in motion. The apparatus includes a coating applicator and an air moving device mounted adjacent to the coating applicator. The coating applicator is capable of applying adhesive in the form of an adhesive filament in a pattern onto each narrow substrate. The air moving device includes one or more air discharge passages capable of directing a flow of air toward the narrow substrate. The flow of air transfers momentum to airborne sections of the adhesive filament for promoting coating uniformity on the narrow substrate.

Abstract: A spray gun pressure stabilizer of the present invention comprises a nozzle, a spray head and a spray gun, the spray head is threaded to the front end of the spray gun and is composed of a spray hole and air outlets at the center portion axially, the front end of the spray gun is further composed of a recess for a de-pressure ring to sleeve thereon, the recess comprises an air outlet and a de-pressure hole, the recess also has a threaded inner hole to connect with the nozzle. The improvements of this invention is to form a pipe at center portion of the nozzle, and extending therefrom a block rim, the nozzle further comprises a circular rim with a number of air holes, so that air flows through the air holes will be blocked by the block rim, which de-presses the air to provide a stabilization of air output.

Abstract: A liquid dispensing module and nozzle or die tip for dispensing at least one liquid filament from a liquid discharge passage onto at least one moving strand. A strand guide is used for guiding each strand past the nozzle and/or locating each strand relative to the discharged liquid filament. The nozzle includes a process air outlet that supplies a stream of process air impinging each moving strand before the liquid filament is dispensed onto the strand.

Abstract: A system for dispensing liquid material with different configurations of air assisted fiberization or filament movement (e.g., meltblowing, controlled fiberization). In particular, front access for mounting a selected nozzle only requires adjustment of one lever and one fastener. Features of the lever and nozzle allow assisted ejection of the nozzle, even when the nozzle has become adhered to a die body through use. In addition, a nozzle mounting surface of the die body provides a universal interface to the various types of nozzles. An air cavity in the die body and air troughs in selected types of nozzles balance and adjust air flow.

Abstract: A liquid dispensing module and nozzle or die tip for discharging at least one liquid filament. The nozzle includes a wedge-shaped member having a pair of side surfaces converging to an apex. A liquid discharge passage extends along an axis through the wedge-shaped member and through the apex. The wedge-shaped member extends in a radially asymmetrical manner around the liquid discharge passage. Four air discharge passages are positioned at the base of the wedge-shaped member. At least one air discharge passage is positioned adjacent each of said side surfaces and each of the air discharge passages is angled in a compound manner generally toward the liquid discharge passage and offset from the axis of the liquid discharge passage.

Abstract: A system for dispensing liquid material with different configurations of air assisted fiberization or filament movement (e.g., meltblowing, controlled fiberization). In particular, front access for mounting a selected nozzle only requires adjustment of one lever and one fastener. Features of the lever and nozzle allow assisted ejection of the nozzle, even when the nozzle has become adhered to a die body through use. In addition, a nozzle mounting surface of the die body provides a universal interface to the various types of nozzles. An air cavity in the die body and air troughs in selected types of nozzles balance and adjust air flow.

Abstract: A system for dispensing liquid material with different configurations of air assisted fiberization or filament movement (e.g., meltblowing, controlled fiberization). In particular, front access for mounting a selected nozzle only requires adjustment of one lever and one fastener. Features of the lever and nozzle allow assisted ejection of the nozzle, even when the nozzle has become adhered to a die body through use. In addition, a nozzle mounting surface of the die body provides a universal interface to the various types of nozzles. An air cavity in the die body and air troughs in selected types of nozzles balance and adjust air flow.

Abstract: A spray gun with a stabilizing structure of air output comprises a circular recess on an inner edge at the front end of the spray gun, the circular recess is connected to an air outlet of the spray gun, there is a gap formed between the inner edge of the spray gun and a spray tube, the gap is to store air from the circular recess and transforms to an air chamber formed between a circular trough and a collar so as to spray air out evenly.

Abstract: A system (2) for dispensing liquid material onto a moving substrate (30) includes a liquid dispenser (16) fluidly connected to a source of liquid material (4) and a source of pressurized air (6). The liquid dispenser (16) includes a plurality of liquid material outlets (76) spaced along a common axis at one end of the dispenser (16) for dispensing a plurality of strands (27a) of liquid material toward the substrate (30). The liquid dispenser (16) further includes a pair of air outlets (84) associated with each of the liquid material outlets (76) for emitting pressurized air (100) that is operable to oscillate the dispense strands in directions predominantly parallel with the common axis of the liquid material outlets (76) during flight toward the substrate (30) to form an overlapping pattern (104) of liquid material on the moving substrate (30). Methods for dispensing liquid material onto a moving substrate are also disclosed.

Abstract: A liquid dispensing module and nozzle or die tip for discharging at least one liquid filament. The nozzle includes a wedge-shaped member having a pair of side surfaces converging to an apex. A liquid discharge passage extends along an axis through the wedge-shaped member and through the apex. The wedge-shaped member extends in a radially asymmetrical manner around the liquid discharge passage. Four air discharge passages are positioned at the base of the wedge-shaped member. At least one air discharge passage is positioned adjacent each of said side surfaces and each of the air discharge passages is angled in a compound manner generally toward the liquid discharge passage and offset from the axis of the liquid discharge passage.

Abstract: A system for dispensing liquid material onto a moving substrate includes a liquid dispenser fluidly connected to a source of liquid material and a source of pressurized air. The liquid dispenser includes a pair of outer liquid material outlets and a plurality of inner liquid material outlets therebetween spaced along a common axis at one end of the dispenser for dispensing a plurality of strands of liquid material toward the substrate. The liquid dispenser further includes a pair of air outlets associated with each of the inner liquid material outlets and a single air outlet associated with each of the outer liquid material outlets for emitting pressurized air that is operable to oscillate the dispensed strands in directions predominantly parallel with the common axis of the liquid material outlets during flight toward the substrate to form an overlapping pattern of liquid material on the moving substrate. Methods for dispensing liquid material onto a moving substrate are also disclosed.

Abstract: A die tip for use in meltblowing liquid material onto a moving substrate having a layer of entrained air moving in a common direction therewith. The die tip includes a base member having a plurality of liquid dispensing outlets for dispensing liquid material toward the substrate and a plurality of air discharge outlets for discharging air toward the liquid material dispensed from the liquid dispensing outlets. The base member includes at least one air deflecting member extending outwardly from the base member and toward the substrate. The air deflecting member is operable to deflect the moving entrained air in a direction away from the air discharge outlets of the meltblowing die tip. The air deflecting member substantially reduces the build up of dust and other debris carried in the entrained air around the air discharge outlets to maintain consistent and reliable operation of the meltblowing die tip.

Abstract: Apparatus and methods for spray coating selected areas of a circuit board with a liquid coating material without coating regions of the circuit board to be left uncoated. In one mode of operation, a bead of liquid coating material dispensed from an elongated nozzle tip is atomized by directing jets of air pressurized against the bead to form a conical, swirling spray pattern which is sprayed on selected areas of a circuit board. In a second mode of operation, the non-atomized bead of liquid coating material dispensed through the elongated nozzle tip is applied on selected areas of the circuit board. In a third mode of operation, jets of pressurized air are directed against the bead of liquid coating material to create a soft swirl pattern, without atomizing the bead of coating material. In a second embodiment of the invention, the bead of liquid coating material is dispensed from a nozzle without the elongated nozzle tip.

Abstract: An air assisted spray nozzle assembly adapted for more efficiently producing a full cone spray distribution with finely atomized particles distributed throughout the conical spray pattern. The spray nozzle assembly includes a nozzle body having a liquid passage communicating with the pressurized liquid supply and at least one air passage communicating with a pressurized air supply.

Abstract: A nozzle assembly 12 having shroud members 26, 28 which selectively emit a material 21 along at least one edge of emitted material 25. The selectively emitted material 21 substantially prevents and/or eliminates the turbulent shear layer which is formed within the emitted material 25.

Abstract: A truncated cone which causes pressurized air flow from plural pressurized air holes to rotate and flow down along the circumferential surface of the truncated cone is provided connectedly at the underside of a nozzle base. A pair of (right and left) downward slanting surfaces which are recessed in V-shape (in side view) are formed in such a fashion that they oppose to each other and slant upward and toward the center. A nozzle projection whose underside is a non-circular shape having a minor axis in the direction where the lower ends of the downward slanting surfaces exist and a major axis in the direction where the lower ends of the downward slanting surfaces do not exist, is provided connectedly at the underside of the truncated cone. In the second invention of the present application, adhesive exposing surface is formed at a part of the downward slanting surface.

Abstract: An air assisted spray nozzle assembly having an air cap effective for generating wide, flat spray patterns with improved liquid particle breakdown, utilizing relatively low air flow rates and pressures. The air cap includes a pair of longitudinally extending air passageways on opposite sides of a central liquid flow stream discharge orifice. The air flow passages each have a discharge orifice defined by a respective transverse deflector flange and a closely spaced inwardly tapered deflector surface which cooperate to deflect and guide pressurized air streams inwardly toward the discharging liquid flow stream for atomizing the liquid and for directing it into a well defined spray pattern.

Abstract: The invention relates to a method and a device for the delivery of adhesives, in particular for the delivery of hot melt adhesives in the form of a thin stream of adhesive spray directed onto the product surface and acted upon by at least one air jet. A spray head (40) is arranged at the one end of the device (45), which comprises a connecting housing (25) for receiving a insertion element (30), provided with an outlet opening (34) for the thin stream of adhesive spray (glue) and embodied as a nozzle conduit, a guide sleeve (35), designed for the coaxial seating of the piston rod (43), as well as a nozzle body (15) with bores (20) arranged in the circumferential direction distributed in respect to each other, in which an air nozzle (10) with an interior chamber, which is embodied to be convergent-divergent in the flow-through direction, is respectively arranged.

Abstract: The present invention is characterized by an air spray gun type coating device having a doughnut disk 1 in an outer circumferential direction perpendicular to a nozzle body 13, wherein plural through holes 3 are provided at equal intervals to an inside of a front face of the disk 1 so as to open from the rear to the front of the disk 1, and wherein plural exhaust nozzles 4 for spouting compressed air are provided at equal intervals to an outside of the front face of the disk 1 so as to surround coating material 7 spouted from the nozzle body 13.

Abstract: A process and a dispersion apparatus for shaping a powder cloud emerging from a powder spraying apparatus achieve large powder clouds and good electrostatic charging by directing control air in a tangential direction towards a powder/air stream flowing through the dispersion apparatus in an axial spraying direction. A helically accelerated movement of the powder/air stream in the direction of an outlet is achieved thereby.

Abstract: A spray nozzle member jets out paint in a fan-shaped pattern. Air streams are jetted from a conically annular center air nozzle in such a way as to surround the fan-shaped pattern, whereby a conically atomized spray pattern is discharged from a deformed opening. Notches formed on the deformed opening cause the conical pattern to spread, and fan-shaped air streams produced by air from auxiliary air nozzles promote the spreading of the spray pattern to a greater extent. Oblique air streams are forwardly supplied from side air nozzles into that pattern, so that a fan-shaped spray pattern is again produced. Paint under a pressure of several kg/cm.sup.2 is discharged from a spray nozzle. An atomizing air stream, except the part thereof corresponding to the edge of the fan-shaped spray, converges on the front extremely close to the spray nozzle. The atomizing air stream is discharged under a pressure of less than 2 kg/cm.sup.

Abstract: A hot melt adhesive dispensing apparatus comprises a housing including a supply chamber for receiving and holding a solid adhesive, an electrically powered heater, and a spray nozzle assembly. A pneumatically actuated plunger pushes solid adhesive towards the melt chamber wherein the solid adhesive is progressively melted for passage into the spray nozzle assembly which includes a plurality of air jets which impinge upon the stream of melted adhesive exiting a nozzle to create an adhesive spray.

Abstract: A one-piece nozzle adapted for use within an adhesive dispenser includes a nozzle body formed with a throughbore having a discharge outlet within a nozzle tip portion which emits a bead of adhesive. A nozzle cap mounts the nozzle body to the adhesive dispenser such that an adhesive passageway within the dispenser communicates with the throughbore in the nozzle body and a plunger valve associated with the adhesive dispenser extends into the nozzle body in position to engage a seat formed at the nozzle tip. A number of air jet bores are drilled in the nozzle body, each communicating with an air passage formed between an outer surface of the nozzle body and an inner surface of the nozzle cap, which discharge jets of air into contact with the adhesive bead producing an elongated adhesive fiber deposited in a spiral pattern onto a substrate.

Abstract: A nozzle assembly, adapted to mount to the distribution manifold of a spray head attachment, comprises a nozzle body fixedly mounted to the distribution manifold, a nozzle attachment rotatably mounted to the nozzle body and a nozzle plate carried by the nozzle attachment which is formed with an adhesive discharge bore and a number of air jet bores The nozzle plate is mounted on the nozzle attachment in an offset position with respect to the longitudinal axis of the nozzle body, and, because the nozzle attachment is rotatably mounted to the nozzle body, the position of the discharge bore of the nozzle plate can be adjusted with respect to the nozzle body.

Abstract: An improved loop producing apparatus includes an adhesive gun and a nozzle member for emanating a bead of adhesive in a spiral pattern caused by the direction of air jets toward the adhesive bead as it emanates from the nozzle. A plenum chamber just upstream of the nozzle member is provided with diffusing or baffling means for diffusing the flow of air before it is introduced to the bores in the nozzle member. Overlapping loops of an adhesive bead are deposited onto a substrate in very consistent loop widths and with little loop width variation independently of the angular orientation of the nozzle member.

Abstract: A nozzle assembly and method for delivering swirls of a thermoplastic melt to a substrate operate on the principle of contacting a thermoplastic spun filament with swirling air to impart a circular swirling expanding cone pattern to the filament. The swirling filament is deposited on a substrate or collector as circular beads.

Abstract: A nozzle cap, adapted for use with an adhesive dispensing device which includes a gun body and a nozzle having an adhesive passageway and an air passageway, comprising a nozzle mounting portion or nut permanently mounted to a nozzle plate formed with a stepped throughbore having an inlet with a seat which mounts an O-ring and a plurality of spaced air jet bores located radially outwardly from the throughbore and O-ring. Both the nut and nozzle plate are machined separately, and then are substantially permanently interconnected by roll-forming an end of the nut onto the peripheral edge of the nozzle plate. When the nut portion of the nozzle cap is assembled on the nozzle of the adhesive dispensing device, the nozzle plate is positioned such that its stepped throughbore communicates with the adhesive passageway in the nozzle and its air jet bores communicate with the air passageway in the nozzle.

Abstract: A spray head attachment adapted for use with a flow metering device such as a metering gear head is effective to discharge a plurality of spiral spray patterns of hot melt adhesive, in elongated strands or fibers, onto the backing sheet of a hygienic article. The spray head attachment includes a manifold having adhesive passageways connected to outlets of the metering gear head, air passageways connected to a source of pressurized air and recirculation passageways connected to a source of hot melt adhesive. Outlets of the adhesive and air passageways, and inlets of the recirculation passageways, are formed on a discharge surface of the manifold in groups or arrays, so that nozzles mounted to the manifold are each connected to one array of adhesive, air and recirculation passageways.

Abstract: An apparatus for spraying heated hot melt adhesive in elongated strands or fibers in a controlled, spiral pattern upon a substrate comprises a spray gun having a nozzle formed with an adhesive delivery passageway and an air delivery passageway both of which terminate at the base of the nozzle. A nozzle attachment in the form of an annular plate is mounted to the base of the nozzle by an end cap. The annular plate is formed with a throughbore which receives hot melt adhesive from the adhesive delivery passageway and ejects an adhesive bead through a nozzle tip formed on the plate. An annular groove formed in the plate facilitates the drilling of air jet bores therein at an angle relative to the throughbore and adhesive bead ejected therefrom.