Abstract: The specification discloses a hot gas distributor in a paper making machine. The distributor includes a pipe supported by end plates and supporting an elongated hood divided by partitions into a multitude of chambers. Centered in each chamber is a tubular nozzle extending through aligned holes in the pipe. Hot gas in the pipe flows into the nozzle through ports in the nozzle and down through the nozzle into the chamber and through a slotted arcuate plate forming the bottom of the chamber. Adapter blocks on the pipe support the nozzles and bonnets which support pneumatic actuators and through which connecting rods extend. A piston-like control plug or valve member on the rod closes the ports in nozzles to the extents that the pneumatic actuators are set to differentially dry a paper web just below the hood.

Abstract: A small-mouthed container having a continuous resinous coating covering the interior of said container and end, said interior coating having a thickness less than about one mil and being free of low molecular weight organic matter, is disclosed herein. Typical containers are food and beverage containers having cylindrical metal walls and circular disc-shaped ends. The coating is typically a comestible coating having a thickness of less than one mil and having no occluded solvent therein. Thermoset resinous coatings are particularly useful.A coating is applied by flowing a mixture of gas and fine resin particles through a nozzle into the vicinity of a plasma arc flame which at least partially melts the surface of said particles and propels said particles into a rapidly spinning container having one closed end. A predetermined quantity of resin is pulsed through the nozzle to deposit on the interior of the container a uniform coating of resin particles.

Abstract: A method and means for more efficiently stabilizing a plasma arc produced within a plasma producing device. Improved arc stabilization is achieved by dissipating the heat generated by the electrodes of the plasma producing device under controlled conditions. This is achieved, in one instance, by direct liquid cooling of the anode and concomitantly therewith indirect liquid cooling of the cathode. The latter is achieved by passage of a liquid coolant around a heat sink positioned in conductive relationship with the cathode.

Abstract: A method for coating a cylindrical container with a thin, resinous coating by spraying powdered resin is disclosed. The technique involves spraying of finely divided resin particles at a velocity of at least about 200 feet per minute from a spray nozzle external to the container into the interior of a rapidly revolving container, particularly slender, cylindrical containers. The container may be sprayed by directing a pulse of a predetermined quantum of resin into the container to deposit a substantially uniform coating. Alternatively, a continuous flow of resin at a predetermined rate may be sprayed into a container. The resin particles are caused to adhere to the container by preheating the container. The coating is rendered continuous by preheating the container to temperatures above the softening point of the resin. Postheating of the coated container at temperatures in excess of about 300.degree. F matures the coating.

Abstract: A powder dispensing device which includes an indexing motor for incrementally rotating a flexible rotor wheel fitted with a plurality of spaced apart, open ended metering chambers. The device is designed to allow the metering chamber to fill with powder while rotating within a powder reservoir and to selectively register with a peripherally sealable tubular outlet through which the powder collected therein can be pneumatically ejected. The indexing motor includes a sectored drive gear loosely held about an elongated shaft fixed at its lower end to a pin wheel having a number of spaced apart bored openings. The bored openings hold a plurality of vertically slidable pins which selectively engage the sectored drive gear. A pneumatic piston cooperatively connected to a tooth-rack gear is provided for moving the sectored drive gear incrementally.

Abstract: A powder feeder, especially useful for transporting particulate materials at very low, yet precisely controlled, rates. A container preferably a closed vessel, is provided with an orifice to admit gas up through the bottom of the vessel in a high velocity column (or jet). A pair of concentric conduits is suspended from the top of the vessel in approximately axial alignment with the orifice so that the column of gas is captured within the outer conduit and substantially all enters the inner conduit. Particulate material (such as metal powder) is stored in the space between the outer conduit and the walls of the vessel. The spacing of the outer conduit from the bottom of the vessel is adjusted to admit particulate material to the vicinity of the orifice at a controlled rate but to prevent flooding of the space between the orifice and the conduits. When gas is forced through the orifice, particulate material is lifted by the venturi pressure effect created by the gas column.

Abstract: A novel process for applying cured thermoset resinous coatings to various kinds of substrates and in particular, to thin metal substrates, is disclosed. Finely divided thermosettable resinous particles containing a solid catalyst are introduced into a region of a plasma arc generated flame having a temperature greater than the melting point of said resin. The residence time of said resinous particles in the vicinity of said flame is maintained for a period sufficient to liquify substantially said particles and to initiate polymerization of the thermosettable resin particles. The liquified resin particles are propelled towards a substrate with sufficient velocity to cause said liquified resinous particles to impact with sufficient force to cause said particles to flow upon said substrate to coat same with a continuous, thin coating. The coated substrate is then cooled at a rate sufficiently slow to permit said coating to cure.

Abstract: A small-mouthed container having a continuous resinous coating covering the interior of said container and end, said interior coating having a thickness less than about 1 mil and being free of low molecular weight organic matter, is disclosed herein. Typical containers are food and beverage containers having cylindrical metal walls and circular disc-shaped ends. The coating is typically a comestible coating having a thickness of less than 1 mil and having no occluded solvent therein. Thermoset resinous coatings are particularly useful.A coating is applied by flowing a mixture of gas and fine resin particles through a nozzle into the vicinity of a plasma arc flame which at least partially melts the surface of said particles and propels said particles into a rapidly spinning container having one closed end. A predetermined quantity of resin is pulsed through the nozzle to deposit on the interior of the container a uniform coating of resin particles.