Abstract: An extension tube system for a dust particulate dispenser and a method of using the extension tube system are disclosed. The system includes a flexible duster extension tube having a central body portion with a first diameter, a first coupling end with a larger diameter, and a second dispensing end with a smaller diameter. Additionally, the second dispensing end includes a dust particulate collection region which serves to prevent dust particulates from spilling out of the duster extension tube when such action is not desired. The first coupling end is inserted over an outlet region of a dust particulate dispenser. Additional extension tubes can be connected to the second dispensing end of an extension tube to extend the reach to an area where dust particulates must be applied. A flexible duster extension tube cleaner having a cleaning element is used to clean remaining dust particulates from within the extension tubes.

Abstract: An extension tube system for a dust particulate dispenser and a method of using the extension tube system are disclosed. The system includes a flexible duster extension tube having a central body portion with a first diameter, a first coupling end with a larger diameter, and a second dispensing end with a smaller diameter. The first coupling end is inserted over an outlet region of a dust particulate dispenser. Additional extension tubes can be connected to the second dispensing end of an extension tube to extend the reach to an area where dust particulates must be applied. A flexible duster extension tube cleaner having a cleaning element is used to clean remaining dust particulates from within the extension tubes. After the dust particulates are dispensed through the extension tube system, each extension tube is disconnected, and the tube cleaner is gripped at one end so that the cleaning element at the other end can be inserted into each flexible duster extension tube.

Abstract: A container and distributor of water is internally provided with a bath pivoted in such a way as to empty when full. A floating piston situated inside a chamber enables water delivery to the bath at a rate regulated by varying a water head in the chamber, and an outlet opening from the chamber conducts water into the bath. A rod, insertable in the outlet opening and movable upon pivoting of the bath, prevents a build-up of residues in the outlet due to impurities in the water such that the outlet opening does not become blocked or obstructed.

Abstract: A semiconductor fabrication apparatus for forming a film on a wafer by a CVD method provides for easy removal of the dust generated in a film-forming chamber without reducing the uptime/downtime ratio of the equipment. The apparatus includes one or more gas dispersing devices having gas releasing surfaces for releasing a reaction gas to form a film on a wafer; one or more wafer holders having wafer mounting surfaces opposed to the plane defined by the gas releasing surface; and one or more cleaners, each having a suction port and a brush connected to the suction port, provided opposing the gas releasing surface. Either the cleaner or the gas dispersing device is moved so that the brush contacts and traverses the gas releasing surface.

Abstract: A plural component airless spray gun for mixing and dispensing coreactive liquid materials has a mixing chamber into which coreactive components are introduced and mixed, an airless tip at a forward end of the chamber and from which the mixed components are emitted in a fan-shaped spray, and a mechanical purging rod that is actuable to clean residual mixed components from both the mixing chamber and the airless tip. The purging rod which has a main body of a diameter slightly less than that of the mixing chamber, and a forward end that defines a probe of a diameter that is slightly less than the dimension of the minor axis of an elongate orifice of the airless tip. During spraying, the purging rod is retracted rearwardly of the mixing chamber and of coreactive fluid inlets to the chamber.

Abstract: An improvement is provided in a coating system including a dispenser, a coating outlet for delivering a coating material to a surface of a moving workpiece to which coating is to be applied in a desired pattern, and a dispensing control for producing control signals in a predetermined fashion for initiating and terminating the release of coating material to the outlet. The improvement includes a wiping member selectively advanceable and retractable relative to the coating outlet for wiping excess coating material therefrom and a cleaning control responsive to predetermined control signals from the dispensing control for advancing and retracting the wiping member in a predetermined fashion.

Abstract: Nozzles are provided for spraying a wetting medium into the gas flow in an activating reactor. The nozzle comprises a nozzle body having a plurality of nozzles The nozzle body is surrounded by a flexible and/or porous casing and a conduit introduces a gaseous medium into the casing. The gas can be introduced in either pulses or continuously. The gas introduced in pulses causes the casing to change its form and, where a perforated or porous casing is used, the continuous gas flow forms a protective gas film around the casing, thus removing the solid material accumulated on the casing.

Abstract: In a fuel injector, a swirl generator operates to impart a tangential or swirl component to the fuel as it is expelled from the injector. The mass of the swirl generator is minimized so as to maximize the actuating speed of the injector. The swirl generator develops a pressure drop across the generator during the time the fuel is expelled which pressure drop aids in enhancing the closure time of the injector. The swirl generator provides damping to the needle valve upon both opening and closing. The swirl generator minimizes the volume of residual fuel remaining in the injector.

Abstract: A shower head has a body having a wall and forming therewith a pressurizable compartment. This wall has an inner face in the compartment and an outer face and is formed therebetween with an array of throughgoing perforations. Respective flexible tubular extensions are provided on the outer face of the wall at the perforations. These extensions can be deformed to flake off lime formations adhering to the extensions. The extensions can be unitary with the wall, in which case the wall is made of an elastomer, or respective tubular liners in the perforations having outer ends projecting past the outer face can form the respective extensions. In this case each liner can have laterally projecting inner and outer ridges respectively bearing against the inner and outer faces of the wall. Furthermore each liner has a predetermined diameter of between 1 mm and 2 mm, preferably 1.2 mm, and each extension extends beyond the outer face by a distance generally equal to the respective diameter.

Abstract: An apparatus (10) for spraying a liquid, such as a low-solids flux, onto a substrate (12), during its transit along a first path (15), comprises a spray gun (38) directed at the substrate. The gun (38) is carried by a carriage (34) reciprocated by a traversing mechanism (42,44,46) which reciprocates the gun back and forth along a second path (30) generally perpendicular to the first path (15). The spray gun (38) is reciprocated such that its spray pattern during each pass slightly overlaps the pattern made during the previous pass, thereby achieving substantially uniform liquid coating on the substrate. Each time the gun (38) reaches an end of its travel, its tip (39) is advantageously cleaned automatically by a brush (84) wetted by a solvent to avoid tip clogging.

Abstract: A device for delivering paints comprises a housing containing a rod which is movable by a microprocessor controlled pneumatic piston, to seal both ends of a discharge duct. The pneumatic piston is activated to move the rod to open both ends of the discharge duct for the delivery of paint. The rod can then be moved to close the discharge duct and avoid the drying of paint within the duct.

Abstract: An attachment for use with a fertilizer distributor apparatus (22). The attachment includes a plurality of plungers (82) comprising an assembly for cleaning entry ports (46) to distributor conduits (48) and for governing which ports (46) fertilizer will be channelled into. A preferred embodiment of the invention comprises two gangs of plungers (82), one gang for entry into ports (46) leading to distributor conduits (48) extending to a boom (62) on one side of a distribution vehicle (20). The other gang of plungers (82) controls entry of fertilizer into and through entry ports (46) opening into distributor conduits (48) leading to the boom (62) on the other side of the vehicle (20).

Abstract: This invention is directed to a seal for a needle valve stem in devices used to dispense a fluid. The seal comprises an O-ring in radial and annular compression about the outside cylindrical portion of a needle valve stem.

Abstract: A device for preparing a chemically reacting mixture and for ejecting the mixture into a mold, the mixture comprising at least two components, in particular a mixture of isocyanate and a polyol that reacts completely to form polyurethane, the device having a mixing head with an outwardly opening bore, and a reciprocable ram coupled to the head. The ram has an ejector rod axially movable in the bore for therewith defining a mixing chamber and for ejecting the mixture from the chamber. The head has inlet passages for inletting the components into the chamber for preparing the mixture. The mixture head has another bore extending perpendicular to the bore in which the rod slides, and a ceramic body is located in the other bore for stripping off a film of the mixture from the rod during its axial return movement.

Abstract: A pop-up sprinkler unit for mounting beneath the surface of a soil formation includes an outer cylindrical housing for subsurface mounting with an inner housing carrying a nozzle and drive turbine with a protective sleeve of a grit resistant material reciprocably mounted between the inner and outer housings for extending with the inner housing up through a portion of the soil and includes a grit deflector on the housing surrounding the sleeve for deflecting grit from between the sleeve and housing when the inner housing and sleeve is retracted.

Abstract: A paint receptacle apparatus comprising an open topped can having a first outwardly and downwardly directed flange attached to its open upper end and a lid having a second downwardly and inwardly extending flange engaging the first flange. The cover has a tube receiving opening having a cylindrical tube wiper received in it. The wiper has a cylindrical body received in the opening and an outwardly directed flange attached to its upper end overlying the lid and a first inwardly directed wiper flange and a second inwardly directed wiper flange receiving the tube of a paint gun. The wiper flanges each have a vent opening and a divider holding them apart. The flanges wipe the paint from the tube when the tube is removed from the can.

Abstract: A nozzle assembly constituting a burner or blowing nozzle includes, in the region of the discharge opening thereof, a piston-like member which is displaceable by an actuating means into a position of blocking off the discharge opening thereby to prevent same from becoming clogged by slag or metal splashed thereon. When the assembly is mounted in the wall of a metallurgical furnace, the piston-like member may also be adapted to close off the opening in the wall, which communicates with the nozzle assembly, in order also to keep the wall opening open. At least a part of the piston-like member may be caused to oscillate or at least the part thereof which is towards the interior of the furnace may comprise or be coated with a scale-resistant material or may be coated with a material that is difficult to wet.