Abstract:
The present invention relates to a spraying nozzle, a spraying device including such a nozzle, and a spraying method implementing such a device. A nozzle for projecting powdery sold products for coating objects. The nozzle comprises a body having an essentially cylindrical shape and comprises at least two tunnels extending there through and insulated from each other. Each tunnel developing helically about a main axis of the nozzle. The tunnels are independently supplied with a fluid/powdery solid(s) mixture. The helical shape of the tunnels makes it possible to obtain a powerful jet with a conical shape capable of coating the inner surfaces of tubular objects.
Abstract:
Control method and apparatus for a manual spray gun includes display that is disposed on the spray gun and that provides information to an operator about one or more coating operation parameters. An auxiliary trigger may be used that enables an operator to make selections or changes of one or more coating operation parameters. The display and auxiliary trigger together permit an operator to make selections or changes without having to divert attention or field of view away from the spray gun or the coating area, especially during a coating operation. The display may include numeric information, for example, data relating to a coating function being displayed.
Abstract:
A system and method for applying a material, such as a polymer composition, to a substrate, the method comprising mixing the material with a heated carrier gas stream, spraying the material through a nozzle, and radiant and convective heating of the material during transport. Preferred embodiments of the system and method can be used to spray polyetherimides, polyimides, polyamides, thermoset resins (e.g., and epoxies, polyesters and silicones), liquid crystal polymers, compositions comprising a blowing agent, compositions comprising a binder, compositions comprising a metallized material, compositions that produce an open cell foam, and compositions that produce a closed cell foam.
Abstract:
The invention provides a hair building solids dispenser for storing and dispensing hair building solids comprising first electrostatic charge controller adapted for altering and/or maintaining an electrostatic charge on a surface of at least some of said solids contained within, and/or as dispensed from, said dispenser, wherein at least a substantial portion of the exterior surface of the dispenser comprises substantially electrically non-conductive material, the first electrostatic charge controller being an electrically conductive material for providing an electrical connection between the inside and outside of the dispenser.
Abstract:
A nozzle assembly for a material application device includes an expansion chamber for slowing down the velocity of powder fed to the nozzle from a dense phase pump. The nozzle assembly includes a nozzle insert that forms the expansion chamber and provides air assist function. The nozzle includes an integral deflector, and further includes a passageway for a charging electrode so that the electrical path is routed away from the powder path, while permitting the electrode tip to be centered in the powder spray pattern from the nozzle. The nozzle also includes air wash for the electrode. The nozzle outlet orifice has a cross-sectional area that is equal to or greater than the inlet cross-sectional area so that a slow moving dense phase powder cloud is produced by the nozzle.
Abstract:
A memory device includes a composite dielectric layer overlying a substrate. The composite dielectric layer includes a first dielectric layer, a bonding interface, and a second dielectric layer. The first and the second dielectric layers are bonded together at the bonding interface. A first plurality of conductive lines overlies the combined dielectric layer. One or more semiconductor switching devices formed in a single-crystalline semiconductor layer overlie and are coupled with one of the first plurality of conductive lines. The memory device also has one or more two-terminal memory elements, each of which overlies and is coupled to a corresponding one of the single-crystalline switching device. A second plurality of conductive lines overlies the memory elements. In the memory device, each of the memory elements is coupled to one of the first plurality of conductive lines and one of the second plurality of conductive lines.
Abstract:
The present invention generally relates to an electrostatic coating apparatus for spraying a stream of particles onto a medium, and in particular to an apparatus equipped with a powder coating suspension device such as a multivolume chamber, or a air stream creation device. What is also contemplated is the use of a plurality of variable openings in the enclosure, used in conjunction with a plurality of conductors, to dispose a stream of particles onto a moving medium in successive layers. In yet another embodiment, the stream of particles is directed in a directional electrical field created by electrodes placed adjacent to directional shields. The present disclosure relates to an in-line industrial device able to coat paint, starch, thermoplastic materials, or any other powder material onto a medium by successively controlling a plurality of parameters.
Abstract:
Spraying apparatus and methods that employ multiple nozzle structures for producing multiple sprays of particles, e.g., nanoparticles, for various applications, e.g., pharmaceuticals, are provided. For example, an electrospray dispensing device may include a plurality of nozzle structures, wherein each nozzle structure is separated from adjacent nozzle structures by an internozzle distance. Sprays of particles are established from the nozzle structures by creating a nonuniform electrical field between the nozzle structures and an electrode electrically isolated therefrom.
Abstract:
A powder spray coating discharge assembly (230, 260, 216, 228, 232) for connection to an electrostatic spray coating gun (210), the gun (210) having a gun body (212), means for connecting to a supply of coating powder and means for supplying a voltage (20) at first and second potentials respectively to first (292) and second electrical connections (294) each for connection to a respective one of a discharge electrode (232) and a counter electrode (260), the means for supplying the voltage (20) comprising: a variable voltage power supply (114) having an input connected to an electrical power source (110), an output connected to each of the first and second electrical connections (292, 294), a control circuit (128) for controlling the variable voltage power supply (20) and means (120) for sensing an output load, wherein the control circuit (128) is adapted to adjust the variable voltage power supply (20) to reduce the voltage and current in proportion to a sensed increase in load, or vice-versa.
Abstract:
A system for dispensing pulverulent coating material comprises a source of pulverulent coating material, a source of compressed gas, a device for movably supporting a nozzle, the nozzle coupled to the source of pulverulent material and providing an opening through which the pulverulent material is dispensed, a deflector supported by the device and spaced from the opening to aid in shaping a cloud of dispensed coating material, and a source of high-magnitude electrostatic potential coupled to impart electrostatic potential to the dispensed pulverulent material. The deflector includes at least one first passageway extending with a radial component of the deflector and communicating with the source of compressed gas to direct gas with a radial component into the cloud of dispensed coating material.