Abstract: A multiple hole, preferably a two hole spray dispensing system and sprayer in which colliding streams of viscous liquid are dispensed to the atmosphere are provided. The spray dispenser includes a reservoir for storing a fluid product. An aerosol or manually pressurized dispensing system preferably a hand held dispensing system may be used. Liquid is delivered from the reservoir under pressure to a delivery passageway. A nozzle having two or more outlets to the atmosphere is mounted to the delivery passageway to provide colliding streams of fluid.

Abstract: A method and apparatus for molding a plastic washing machine basket includes a fixed mold core formed with teardrop-shaped projections spaced about a periphery thereof, cavity sidewall members spaced about the periphery of the mold core which carry core pins having tips adapted to abut teardrop-shaped projections on the mold core and a cavity cover member spaced about an end of the mold core and abutting the cavity sidewall members so as to define a cavity between the mold core and both the cavity cover member and the sidewall members.

Abstract: A method for manufacturing an injection molded steering wheel pad having a cover and a pocket formed between a first projection and a second hook-spaced projection, that together hold an arm of an airbag device. The pad includes a pad body and at least one pair of holding portions extending from the pad body. The holding portions have an L-shaped first recess and the steering wheel pad has a second recess located between the pad body and the holding portion. A mold includes a pair of first and second molds.

Abstract: An improved core detail tooling assembly for use in the injection molding of electrical connector housings utilizes opposing sets of tooling elements and one set of tooling elements positively engages the other set at a location exterior of openings in the mold cavity. This engagement location permits the molding of electrical connector housings with greater reliability and at smaller pitches.

Abstract: A staged, sequentially separated injection molding apparatus for forming a molded container closure includes a mold base portion, a plurality of concentric, separable telescopic mold elements, and an opening therein defined by one of the base portion and the mold elements for injecting a mold material into the apparatus. The elements are configured such that they can be separated or removed from the mold, from the inner most element outward, to provide sufficient free space for the newly molded part to flex inward as the mold elements are removed. The inward flexing of the part, permits ready removal of the next outwardly most mold element, while minimizing the possibility of damage to the molded part. Each of the mold elements includes a mold face, which in conjunction with the base portion, in part defines a mold cavity. The inner and outer mold elements and the intermediate mold element include flange portions opposite of their respective mold faces.

Abstract: A mold assembly includes first and second housings having generally curved surfaces inside the mold cavity. The first housing has apertures extending therethrough. The second housing may have apertures, axially aligned with the apertures of the first housing, extending partially or completely therethrough. At least one guided, flexible, elongated rod member is configured for reception in the apertures of the first and second housings, the rod members being movable in a direction non-parallel to a direction of movement of the mold assembly with respect to the rod members. The mold-assembly is particularly useful for forming a molded body having a plurality of apertures, aligned in arbitrary non-parallel directions relative to one another, extending therethrough.

Abstract: A method of manufacturing the cylindrical product includes the steps of inserting a first cylindrical mold into a hole at the center of a second cylindrical mold and engaging a toothed portion on the first cylindrical mold with a spiral groove on the second cylindrical mold to provide a lower mold. Further, an upper mold is mounted thereon to form a space for forming the cylindrical product and molten resin material is injected into the space to harden therein. The second cylindrical mold is withdrawn in a direction to allow the mold to be opened, the first cylindrical mold is axially moved to insert the toothed portion into a relief groove on a flat portion of the second cylindrical mold, the first cylindrical mold is rotated in a direction to withdraw it along the flat portion, the upper mold is rotated to extract the cylindrical product.

Abstract: In a TM dual mode dielectric resonator apparatus, a cross-shaped TM dual mode dielectric resonator is provided in an electrically conductive case, and the TM dual mode dielectric resonator includes first and second dielectric resonators integrally formed so as to be perpendicular to each other, and there is further formed at least one coupling groove for coupling an operation mode of the first dielectric resonator with that mode of the second dielectric resonator, wherein the coupling groove is formed on at least one of front and back surfaces of a crossing portion of the first and second dielectric resonators, in a diagonal direction thereof so as to cut electric lines of force of either one of an odd mode and an even mode. Alternatively, at least one coupling projection may be formed instead of the coupling groove.

Abstract: An apparatus for molding a connector includes a stationary body, a moving body, a first and a second blocks detachably fixed to the moving body, and a core block having at least one core. The first block has at least one hole and the second block has at least one through-hole corresponding to the first hole. When the molding apparatus is closed, the stationary body, the moving body, and the first and the second blocks cooperate to define a cavity which will be filled with a molten plastic material and a leading end of the core fits through the through-hole of the second block and into the hole of the first block.

Abstract: A method and apparatus for the compression molding of composite fiber fixed angle rotors is disclosed. A female mold member defines a closed cylinder cavity for molding the bottom surface of the rotor, this cavity usually defining a frustum shaped central cavity complimentary to and concentric with the spin axis of the ultimately formed rotor. A male mold member having a complimentary cylindrical profile contains a frustum shaped inner cavity with the apex of the frustum disposed to the inner portion of the cylinder and the base end of the frustum exposed to the cylindrical opening of the female mold. This frustum shaped inner cavity defines the exterior frustum shape of the ultimately produced rotor and defines between the exterior frustum profile and the frustum shaped inner cavity a rotor body wall having sufficient thickness to receive the sample tube apertures. At the apex end of the frustum shaped cavity in the male mold member, there is located a lock system for maintaining sample tube aperture cores.

Abstract: A manufacturing method for an injection molded steering wheel pad having a cover and a pocket formed between a first projection and a second hook-shaped projection, that together hold an arm of an air bag device. The method includes use of fixed and movable mold members opposed to one another. The movable mold member moves along a predetermined moving path to selectively contact and separate from the fixed mold member. Core members are provided in one of the mold members for forming the first and second projections in the pad. To permit the removal of the molded pad core members are movable between retracted and extended positions with respect to one of the movable and fixed mold members so that the formed pad projections can be separated from the mold by varying movements of the core members, relative to each other and the mold in which they operate.

Abstract: A molding device for a register of synthetic resin adapted for use in adjustment of air flow, wherein a pair of outer frame members, a plurality of spaced adjustment blades and a link member of the register are separately formed and assembled during a molding process without. manual work required heretofore for connecting the link member with the adjustment blades for interconnection thereof.

Abstract: A method and mold for making a wheel of a roller skate including a plurality of circumferentially spaced apart generally axially extending curvilinear paths. A speed skater, traveling a predominately circular course with such wheels properly aligned on such skates, is able to use air moving past the skater to increase skating speed. As air enters the curvilinear paths of the wheel the direction of air flow changes. In this manner, momentum is transferred from the moving air to the spinning wheels, thus increasing the number of revolutions of the wheel and the speed of the skater. The mold may be formed of polyurethane and use flexible fingers to form the curvilinear paths of the wheel.

Abstract: A process for manufacturing product by using a progressively expanding mold comprises (a) using a stationary piece having a cavity therein and having an opening at one end thereof, (b) assembling a first movable piece in the cavity of the stationary piece, (c) filling a molten material from the opening between the stationary mold and the first movable piece, (d) causing the movable piece to move in an appropriate rate away from the opening for a further increment of the filled molten material between the pieces, (e) solidifying the filled molten material to yield a product, and (f) taking out the product from the stationary and first movable pieces. This invention discloses both a process and an apparatus for positive control of the rate of material solidification of a product and molding a more refined product.

Abstract: A method of molding the main body of a Y-adapter that has a straight passageway extending from one extremity to the other and an arcuate passageway that is generated along the arc of a circle. Core pins for the straight and arcuate passageways are placed in a mold such that they merges together to form a single, smooth lumen in the Y-adapter. The arcuate core pin can be withdrawn from the finished Y-adapter as a result of its circular arc.

Abstract: A method and apparatus for manufacturing a separable fastener which includes a pair of fastener pieces. Each of the fastener pieces includes a flat base and a plurality of elastic engagement projections provided on and integral with the base and arranged in a plurality of lateral and longitudinal rows. The engagement projections have respective heads of a uniform size. Each of the heads is supported on the base via a pair of leg pieces united at the upper end to opposed edge portions of the bottom of the head.

Abstract: An injection molding apparatus is disclosed for forming articles with internal undercuts by the use of lifter heads with transversely extending protrusions. The lifter heads are received in recesses in the mold projections which form the interior of the molded article. The transverse protrusions of the lifter heads extend into the voids surrounding the projections to form the undercuts. The lifter heads are extended outwardly from the projections to remove the article from the mold. Ejector pins move the molded article outwardly from the lifter heads. The lifter head protrusions have inward ramping surfaces which facilitate the removal of the molded article. A lifter head may include two, angularly offset protrusions which form two undercuts near the corner between intersecting internal walls of the molded article. The protrusions have beveled release surfaces which allow the molded article to shift transversely off the lifter heads.

Abstract: A method of making plastic molding consists of a boxlike body having an field of multiple fine conical holes. The internal diameter of the fine conical holes gradually decreases from the inner surface of the plastic molding toward the outer surface of the plastic molding, and is in the range 0.1-0.5 mm at the outer surface. The fine conical holes are hardly visible when the outer surface of the box is viewed; ventilation is provided without detriment to the aesthetic appearance of the exterior of the box, and it is not necessary to cover the ventilation holes in the box to keep them out of sight. Conical projection on a male mold are withdrawn before the plastic molding hardens completely and the male mold is separated from a female mold after the plastic material has hardened completely.

Abstract: A wax pattern molding process, employing a mold having a cavity and a core structure in the mold cavity that include closing the mold with the core structure positioned in the mold cavity; injecting flowing heated wax into the mold to flow about the core; allowing the injected wax to cool and solidify to form the wax pattern; removing the core structure from the solidified wax pattern, while the mold holds the pattern in position in the mold; and opening the mold and removing the unencumbered wax pattern from the mold.

Abstract: A molding apparatus for injection-molding a hemispherical hollow body formed of a thermoplastic elastomer and having a valve formed integrally therewith. The apparatus includes a first mold having a hemispherical convex molding surface, a second mold having a hemispherical concave molding surface larger in size than the convex molding surface. The second mold is superposed on the first mold to form a molding cavity for the hollow body. A first valve mold is removably mounted at the center of the hemispherical convex molding surface of the first mold, for forming the valve and an inside and small-diameter portion of a valve rubber insertion hole of the valve. A second valve mold is removably mounted at the center of the hemispherical concave molding surface, for forming an intermediate and large-diameter portion of the valve rubber insertion hole and an outside and small-diameter portion thereof while forming a cavity for the valve in cooperation with the first valve mold.

Abstract: An injection molding apparatus is disclosed for forming articles with internal undercuts by the use of lifter heads with transversely extending protrusions. The lifter heads are received in recesses in the mold projections which form the interior of the molded article. The transverse protrusions of the lifter heads extend into the voids surrounding the projections to form the undercuts. The lifter heads are extended outwardly from the projections to remove the article from the mold. Ejector pins move the molded article outwardly from the lifter heads. The lifter head protrusions have inward ramping surfaces which facilitate the removal of the molded article. A lifter head may include two, angularly offset protrusions which form two undercuts near the corner between intersecting internal walls of the molded article. The protrusions have beveled release surfaces which allow the molded article to shift transversely off the lifter heads.

Abstract: The said structure presents a constitution which, as well as providing a great resistance, supposes an effective reduction of the depth of floor slabs and technical layers built with current construction systems while allowing the incorporation of various technical elements and installations.

Abstract: A slide retainer for an injection mold tool with positive locking, recessed mounting, and guide bar capabilities. The retainer includes a track channel insert rigidly mounted in the base plate of an injection mold tool and a cooperating cylindrical insert mounted for rotational movement in the slide. The channel insert may be extended outwardly from the base plate to serve secondarily as the slide guide bar. The cylindrical insert includes an eccentrically mounted track pin and a torsional spring thereby biasing the track pin for rotation movement. The channel insert includes a circumferential heart-shaped channel that defines an island in the middle thereof. The track pin extends into the channel and traverses the circumferential path once during each mold cycle. A unidirection flapper gate is provided to route the pin through the channel in the proper direction. Slide retention and locking are achieved when the track pin is oriented in the indented portion at the top of the heart-shaped channel.

Abstract: A method of forming an extrusion die fabricated from sinterable ceramic or metal powders, for use in forming honeycomb monolith structures including machining of the die in the green state or after partial densification. Alternatively, all or part of the machining can be performed after full densification or sintering.

Abstract: An injection mold capable of being filled from the center is a gated mold with at least one repositionable subgate. The subgate permits simplified removal of the central portion of the molded article, while at least substantially eliminating secondary treatment of the molded article.

Abstract: A test mold assembly for evaluating the surface deformation tendency of a coverstock bonded to a reactive plastic formulation to voids in the formulation including a base adapted to support a coverstock and spaced side walls extending upwardly from the base to define a mold cavity for receiving foam precursors. The assembly further includes a lid adapted to form the top of the mold cavity and having a cover portion disposed spaced from the base. The lid includes a plurality of integral projections extending downwardly from the cover portion into the mold cavity a predetermined distance to create voids in the foam. A method of making a foam void model for evaluating the surface deformation tendency of a coverstock bonded to a reactive plastic formulation to voids in the formulation is also disclosed.

Abstract: Disclosed is a molding apparatus which includes(A) a mold for making an undercut part which includes coring sandwiched between top and bottom cavity halves, where the coring is divided into three or four sections; and(B) a press for(1) separating the coring from the top and bottom cavity halves; and(2) separating the sections from each other.

Abstract: A high density mold (8), for molding performs having a high density of very small openings, having: a core pin sub-assembly (10) made from a number of plates (16) having core pins (18) extending outwardly from an edge of each plate; and, a stripper assembly (40) that is composed of a stripper sub-assembly (14), formed by bonding thin sheets (34) with apertures (36) corresponding to the core pins (18), and a support sub-assembly (12), formed by a number of plates (24) with spacers to define spaces (26) for the core pins (18), the stripper sub-assembly (40) slides along the core pins (18) to strip the molded preforms from the core pin sub-assembly (10).

Abstract: A method for making concrete cored bricks and capping bricks includes providing a mold having a row of mold cavities separated by cross members having core-bar holes formed therein, inserting a core bar through each cavity and into and filling a core-bar hole associated with rear cavity. Next, a rear core-bar hole is plugged and the cavities are filled with a concrete to form plural uncured bricks. The bricks are then compacted and an elongate, interconnecting pattern is pressed into a first surface of each brick. Next, the core bar is removed from the cavities and the bricks are ejected from the mold. Finally, plural wet layers of colored coatings are applied to the first surface of each brick after which the bricks are cured. Antiqued concrete capping brick including a top surface, four side surfaces, and a bottom surface having formed therein at least one recess are also formed. Additionally, a first side surface of the brick includes elongate, interconnected indentations that extend to the edges thereof.

Abstract: A mold assembly for use in an injection molding process to mold a one-piece article such as a washing machine tub. The mold assembly includes first and second relatively moveable mold plates, a mold core projecting from the first mold plate, and a plurality of mold sidewall assemblies. The mold core includes an annular outer mold surface portion which tapers inwardly to provide draft to ease the removal of the molded article from the mold assembly, and which is provided with a plurality of generally teardrop-shaped projections. Each teardrop-shaped projection converges to its narrowed end in a direction opposite the direction of removal of the article from the mold core and is configured to further ease removal of the article from the mold assembly. The mold assembly also includes a plurality of core pins mounted on the mold sidewall assemblies.

Abstract: A method and apparatus are described for forming a closure device having a cylindrical plug and a cylindrical collar extending coextensively and coaxially from a cap. The apparatus includes an outer mold defining an injection mold cavity. A cylindrical hollow outer core extends into the injection mold cavity and a cylindrical inner core extends into the injection mold cavity within the hollow outer core. Pushing means separate the molded part from the inner core. A stripper separates the part from the outer core by engaging an annular shoulder on the part. The part is pushed free of the mold's inner core after the outer mold is removed but before the stripper is advanced to engage the annular shoulder.

Abstract: A CM block machine for casting masonry blocks includes a mold cavity formed between a mold box and a mold core containing one or more plungers selectively extending laterally into the cavity along a second axis which is normal to the axis of casting so as to form openings extending through portions of the block in the direction of the second axis. The plunger(s) is disposed in a cartridge housing contained within the mold core. An oversized vibrating ring wiper mounted in the cartridge housing engages the external periphery of the plunger to prevent CM material from entering the cartridge during plunger retraction. The plunger includes an annular relief chamber formed in a side wall thereof to provide an additional volume of air from within the cartridge to an air passage communicating with the plunger end face to prevent vacuum from impeding plunger retraction.

Abstract: The biaxial CM casting apparatus utilizes one or more main mold cores having an automatically extensible and retractable plunger or like structure extending laterally into the mold cavity from the one or more main mold cores along an axis substantially orthogonal to the axis of casting during certain selected phases of the CM casting process to form one or more openings or other structural changes in the casted concrete which openings or changes extend in the direction of a second axis normal to the casting axis.

Abstract: A method of making a measuring and dispensing apparatus molded in one piece for placement in a neck of a flexible wall container is provided. The apparatus has side walls, a base wall, an open top and an upstanding central member which contains a central bore and side or lateral discharge ports for directing the flow of liquid at an angle offset from the axis of the central upstanding member. The method of making the measuring and dispensing apparatus involves injection molding utilizing upper and lower mold halves in conjunction with a center core pin and retractable orifice pins. The center core pin forms the bore present in the upstanding member of the apparatus and the orifice pins form the lateral discharge ports present in the upstanding member.

Abstract: An elastomeric-covered shrouded impeller having a pair of disk-like shrouds enclosing vanes and vane passages which has an improved throat opening having sweeping internal sidewalls is disclosed. A three-piece mold core is utilized to form the vane passage and the sweeping curved throat inlet of the impeller.

Abstract: A mold for manufacturing a skin covered foamed plastic article in which the middle mold is to be attached to the upper mold so as to eliminate the attaching and removing of the middle mold for every manufacturing cycle, without creating a danger of damaging the manufactured skin covered foamed plastic article in taking it out of the mold. The mold includes a middle mold to be attached to the upper mold such that when the upper mold is lifted upwards in order to be disassembled from the lower mold, the middle mold also moves upwards and the skin covered foamed plastic article is taken out from the lower mold by the upper mold and the middle mold; and a protrusion for making a hole in the skin covered foamed plastic article to be manufactured, to be attached to the molding surface of the lower mold, which is freely detachable from the lower mold such that when the upper mold is disassembled from the lower mold, the protrusion is taken off the lower mold along with the skin covered foamed plastic article.

Abstract: An apparatus for injection molding of plastic lure skirts utilizes an openable mold wherein a conic cavity is formed between a pair of mold plates and a conic insert is selectively advanced to abut the inner surface of the conic cavity. A plurality of grooves are formed in the conic cavity which communicates with a tubular section wherein the soft plastic is introduced such that a body portion and a stranded skirt are formed when plastic is injected between the mold plates and the conic insert. The apparatus may be used for forming double skirted lures or conventional non-skirted lures by internal injection when a stripper bar is used to partially seal the mold distribution channel.

Abstract: Apparatus and method for forming a three dimensional injection molded article having a pair of passageways extending therethrough and with a locking indentation in each passageway using first and second mold parts each having open ended cavities having an end wall and a plurality of sidewalls formed therein wherein a pair of fixed arms are mounted on the end wall of the first mold part so that they are spaced from each other and each of the sidewalls, have portions extending out of the open ended cavity and have contoured surfaces and wherein a pair of movable arms are mounted on the end wall of the second mold part for rotation about fixed axes and are spaced from each other and from each of the sidewalls and wherein each movable arm has a contoured surface adapted to be moved into a continuous contacting relationship with the contoured surface of one of the fixed arms and when in the contacting relationship to provide protruding portions to form said locking indentations.

Abstract: A method for forming an as-cast hole by using a core involves forming an undercut and casting by using a core die which is slidable at an angle with respect to mold closing and opening directions. At the same time, an as-cast hole with an axial direction different from the slide direction of the core die is formed. To form the as-cast hole, a floating core is slidably disposed in the core die for movement in the axial direction of the as-cast hole. An apparatus for practicing the method includes a stationary die, a movable die and the core die containing the slidable floating core.

Abstract: The biaxial CM casting apparatus utilizes one or more main mold cores having an automatically extensible and retractable plunger or like structure extending laterally into the mold cavity from the one or more main mold cores along an axis substantially orthogonal to the axis of casting during certain selected phases of the CM casting process to form one or more openings or other structural changes in the casted concrete which openings or changes extend in the direction of a second axis normal to the casting axis.

Abstract: Cylinder block molding apparatus includes two series of parallel and alternate molding plates for partitions. The plates extend in planes perpendicular to the axis of an engine shaft. Each series of molding plates is mounted, respectively, on a support capable of sliding parallel to the axis of the engine shaft relative to the cylinder block between a molding position where mutually confronting molding faces of two consecutive plates bear against one another and a lifting position where the molding faces are moved apart as a result of sliding of the supports.

Abstract: A family of circuit boards are molded, each board having its own unique pattern of recessed circuit paths and component insertion through-holes. A different mold is provided for each different member of the family. The two cavity blocks of each mold cavity contain only the holes that are necessary to define the through-hole pattern for that member of the family. A plurality of core pins or wires are provided at the molding site. Only the core pins that are required by the mold in use at the molding site are rendered operative.

Abstract: An apparatus for making parts having complex geometric shapes by injection molding apparatus. The apparatus avoids the formation of a parting line in the molded object. The apparatus includes an injector plate, an ejector plate and a floating plate. The injector plate has at least one mold cavity for making a part and a passageway to allow molten plastic to enter the mold cavity. The ejector plate has at least one mold cavity corresponding to the mold cavity in the injector plate. The floating plate has at least one projection. The plates are adapted to fit together when the mold is closed so that the floating plate is between the injector and ejector plates and the projection fits centrally between the cavities of the injector and ejector plates. A mechanism moves the injector plate, ejector plate and floating plate with respect to one another.

Abstract: A hollow core for a concrete block is cast from an abrasion resistant alloy steel known in the trade as #8620. The core is generally rectangular in cross section and includes a top wall and depending side walls. The side walls are ground to a mirror-finish and the fine tooling grooves formed when the side walls are ground are all parallel to each other and transverse to the top wall of the core. This greatly lessens the frictional resistance between the core and the cement greatly increasing the useful life of the core in comparison the cores previously constructed.

Abstract: A mold for the formation of plastic Luer nuts having a polygonal internal cross-section. The mold includes both movable and fixed cavity sections, so that a non-round threaded core can be unscrewed from within the Luer nut.

Abstract: A conventional injection mold of the type having two half parts, and slides connected to core parts which slide inwardly and outwardly as the mold half parts open and close, have mounted therein slide retainers which lock the slides in position with respect to a slide plate in one of the mold half parts when the mold halves are fully opened. The retainers include a latch portion mounted to the slide and having a camming surface facing away from the core of the mold and a V-shaped notch therein, and a slide lock mounted below the surface of the slide plate and having a plunger with a head which extends upwardly above the flat surface of the slide plate. The head of the plunger is formed in a V-shape to match the V-shaped notch of the latch and is spring biased upwardly to provide a firm engagement between the plunger head and the latch when the slide is in the fully opened position. A stack of bowed, spring loaded washers may be utilized to apply the spring bias against the plunger to drive it upwardly.

Abstract: A die, in which is to be formed a hollow article having a part-circular portion, such as a "J-tube", includes two opposed die blocks each formed with die cavities which together form the article, and a part-circular core which is positioned within the cavities to form the part-circular portion of the article. The part-circular core is removed from the article, after one die block has been removed, by rotating the core about an axis through the center of the part circle and raising the core along the axis. The axis is inclined to the surface of the die block, towards that length of the part circular core which emerges first from the part circular cavity.

Abstract: An injection mold assembly for formation of thin walled multi-partitioned plastic containers. An array of cantileveredly mounted and spaced apart cores are extendable into a female mold assembly which includes a pair of side cavity cams and end cavity cams closeable upon the array, but spaced therefrom to form the plastic container therebetween. A plurality of side locking wedge shaped fingers are extendable into the slots spacing the cores apart. The fingers are arranged to extend into the opposite sides of the array of cores in a direction perpendicular to the longitudinal axis of the array spacing the cores apart while plastic is injected into the assembly by injectors mounted to the female mold. A pair of end pushers contact the two outermost cores in the array limiting outward movement of the cores during the injection step. The end pushers likewise extend in a direction perpendicular to the longitudinal axis of the array.

Abstract: A device is described for positioning a reinforcing cage within a cylindrical concrete pipe form. The device comprises a horizontally movable slide which may be moved inwardly into the form for engagement with the cage. A cam is secured to the slide for moving the slide inwardly and outwardly relative to the form. An air cylinder is pivotally connected to the cam for pivotally moving the cam. An adjustable stop is located in the pivotal path of the cam to limit the inward movement of the slide. A plurality of the devices are mounted on the form in a radially spaced and vertically spaced manner.

Abstract: An elastomeric-covered shrouded impeller having a pair of disk-like shrouds enclosing vanes and vane passages which has an improved throat opening having sweeping internal sidewalls is disclosed. A three-piece mold core is utilized to form the vane passage and the sweeping curved throat inlet of the impeller.