Abstract: A method of installing fragile, light-weight, high-temperature fiber insulation, particularly where the insulation is to be used as a seal strip providing a high order of thermal barrier insulation. The process is based on provision of a strip of the mineral batting cut oversize by a predetermined amount, saturated in a fugitive polymer solution, compressed in a mold, dried and cured to form a rigidized batting material which may be machined to required shape. The machine dimensions would normally be at least nominally less than the dimensions of the cavity to be sealed. After insertion in the cavity, which may be a wire-mesh seal enclosure, the apparatus is subjected to baking at a temperature sufficiently high to cause the resin to burn off cleanly, leaving the batting substantially in its original condition and expanded into the cavity or seal enclosure.

Abstract: Heat treatment of a material, e.g. a finely divided resin, wherein the material is introduced into a drum and agitated by rotating, spaced blades which whirl the material into a dispersion. The action of the blades heats the resin particles so that heat for the heat treatment is provided. The heat treatment can be, e.g. to cause small resin particles to coalesce with larger particles in the processing of polyethylene reactor flake, to improve flowability of the resin, or to admix resin and additive. To obtain increased capacity while the size of the apparatus is maintained within reasonable limits, two intersecting, generally cylindrical drums, each outfitted with an agitator, are used. Apparently the dispersions of the respective agitators slam into each other in the vicinity of the intersection causing additional heating.

Abstract: Iron-containing refractory balls, in a retorting process for oil shale, permit effective magnetic separation of the balls from the spent shale. These ceramic balls can be made by a process such as admixing powdered alumina and water to form an extrudable mixture, extruding to form cylinders, reshaping cylinders into balls, overcoating with iron particles, further overcoating with alumina, and firing.

Abstract: A method of making leaf springs from fibre reinforced resin composite material, wherein a resin impregnated fibre assembly of a number of individual springs adjacent one another is moulded and treated to cure the resin and then cut into individual springs. The assembly is formed with depressions in the surface thereof along the lines where it is to be cut so the surface fibres remain undisplaced by the moulding process and hence undisturbed by cutting. The invention also provides a mould for treatment of the assembly of resin impregnated fibres including elements which form the surface depressions therein.

Abstract: A method for producing spherical particles of carbon and of activated carbon is described, in which a mixture of a pitch and a viscosity-reducing agent is melt-extruded into a form of string-like bodies, the thus obtained string-like bodies are broken into stick-like bodies of a length to diameter ratio of 1 to 5 and the stick-like bodies are thermally deformed utilizing hot water as a thermal medium into spherical particles. The spherical particles are then subjected to conventional extraction to remove the viscosity-reducing agent therefrom, and the thus obtained spherical particles of pitch are converted into spherical particles of carbon or of activated carbon.

Abstract: A process for producing articles of polytetrafluoroethylene (PTFE) is disclosed. The process allows some of the conventional plastic fabrication techniques to be used with PTFE which until now have not been possible. The process comprises the steps of intensively mixing and thermokinetically heating PTFE resin in an enclosed container with a plurality of blades attached to arms rotating about an axis, with a blade tip speed of at least 30 meters/second, to a predetermined discharge temperature of above 370.degree. C., discharging the resin at the discharge temperature, forming the resin into a desired shape at a temperature at or below the discharge temperature, holding the resin in the desired shape above a predetermined forming temperature for a predetermined time, and cooling the resin in the desired shape.

Abstract: Disclosed is a method for the production of coal pellets for the penetration of finely pulverized coal particles suitable for combustion in a coal burner, which comprises the steps of milling raw coal, preparing a coal particle mixture comprising coarser particles and finer particles of the milled raw coal, and adding a binder to the coal particle mixture to produce coal pellets having the coarser coal particles as nuclei and the finer coal particles attached around the nuclei; the coal pellets so-obtained may be pulverized to provide finely divided coal particles.

Abstract: A two-phase material comprises a higher-melting phase dispersed in a lower-melting matrix. The material made by the method is new since, although it consists of particles of a higher-melting-point phase (e.g. iron) dispersed in a lower-melting-point matrix (e.g. aluminium), the particles being of a material soluble in the matrix at the melting-point of the matrix, no perceptible dissolution of the particles is evident in the material. Such materials may find application as friction materials, for example, in brake pads, stair edging, decking and industrial flooring.

Abstract: A method of making preforms from brittle metals for brazing or hardfacing consists of pulverizing the metals into a powder, mixing the powder with a liquid vehicle to form a paste, passing the paste through a coated screen having an opening in the coating with the size and shape of the desired preform, depositing the output of the screen onto a substrate and thereby making the preform, heating the preform to evaporate the liquid vehicle, and removing the preform from the substrate. The opening in the screen coating is made by exposing a photo-sensitive film to light through a photographic negative or similar mask having the image of the preform and chemically removing a portion of the film to form an opening having the shape of the preform, the film being mounted on the screen either before or after such exposure.

Abstract: In a continuous friction-actuated extrusion process, such as the Conform process, particulate material is fed into the extrusion passageway at a rate low enough to the rate at which material is extruded from the die orifice to be determined by and substantially equal to the rate of feeding. Feeding can be achieved by a simple hopper feeding through an adjustable constriction, preferably formed by a simple gate valve, or a gravimetric or volumetric controlled rate feed device can be used.

Abstract: Substantially pure, free flowing, sodium amalgam particles of predetermined composition and controlled particle size are prepared for use as vaporizable fill for high pressure discharge lamp devices, whereby accurately measurable quantities of the sodium amalgam may be introduced into the lamp devices. A process for producing the substantially pure amalgam particles of accurately controlled size includes heating a mixture of sodium and mercury to form a melt, passing the melt through a vibrating discharge nozzle and subjecting the droplets so formed to an inert cooling fluid maintained at a temperature below the solidification point of the amalgam. An apparatus for producing the amalgam particles comprises a vessel to contain an alkali metal amalgam melt, a virbrating discharge nozzle adatped to form the melt into uniformly sized droplets, and a column of inert cooling fluid maintained at a low temperature at which the melt droplets are solidified.

Abstract: The invention relates to an improved machine for continuously compacting ligno-cellulosic or like materials, comprising two toothed conveyor belts mounted around drums, the teeth and valleys of these belts being located outside so that their stretched sides cooperate to compress a fibrous or like materials poured between these belts via a hopper. Compression rollers facilitate compression and cooperate with the resilient toothed belts to cause a pulsating effect of the belts on the materials. The invention is more particularly applicable to compacting ligno-cellulosic or like materials.

Abstract: An atomizer disk for use in the process of making metal powder by pouring molten metal onto the spinning disk is made from a plurality of contiguous, concentric, radially aligned elements having thermal conductivity properties which are selected to achieve appropriate temperature zones on the surface of the disk during operation. The central disk-like element is preferably a ceramic with low thermal conductivity. The outermost element is a high strength reinforcing ring which preferably also has high thermal conductivity. The annular elements between the outer ring and central disk should also have high thermal conductivity. By properly selecting the disk materials the heat extraction from the molten metal can be better controlled and larger disks may be constructed.

Abstract: Described is an apparatus for freezing molten metals and metalloids in particulate or flake form at very rapid cooling rates. A volatile coolant liquid is fed to the center of a rapidly rotating disc-like member to create an outwardly flowing film of coolant across the surface of the member. The material to be processed is fed in molten form to the coolant film coaxially with the coolant, and is thrown outwardly by centrifugal forces while being cooled by vaporization of the liquid. The rotating member may include upwardly projecting vanes for collision with the outwardly flowing material to produce a higher surface area product and a cover over a portion of its top surface to confine the materials passing through the vanes.

Abstract: A press for the continuous production of pressedboard utilizes a pair of steel pressing belts running over respective surfaces of a platen defined by gaps into which steel rollers are fed. The rollers which have diameters of less than 20 mm are fed with a spacing which corresponds substantially to the thickness of the belts and have diameters equal to substantially ten times this thickness.

Abstract: The press contains a platen and a ram adjustably mounted with respect to the platen to define a press gap for receiving material. A first conveyor band is disposed around the platen and a second conveyor band is disposed around the ram. A plurality of rolls for supporting and guiding the first and second bands are mounted to the platen and ram, respectively. Countersupports are provided for the rolls. The countersupports comprise a plurality of change plates, each of which is capable of being mounted to and removed from a platen or ram. Each change plate includes a first rod mounted in a first level and connected in supporting relation with one of the rolls. A plurality of T-shaped web plates are connected to the first rod in the first level and to a pressure plate in a second level whereby counter-pressure from the material being pressed is transferred to the pressure plate.

Abstract: The invention concerns a filtration block for liquid alloys and metals, with a mechanical and physical-chemical effect.Consolidating, for example by sintering, elements of an active mineral compound based on fluorides, results in a porous structure with a high degree of permeability, which acts both by a mechanical filtration effect and by a washing action in respect of the metal under the action of the active mineral compound which acts as a flux and provides for trapping inclusions.Use for the final purification of aluminium, aluminium-base alloys, magnesium and magnesium-base alloys.

Abstract: Apparatus is disclosed for producing high purity metal powders of precisely controlled particle size. The apparatus employs a system for atomizing a stream of molten metal by a swirling fluid. After initial system set up, different particle sizes may be produced merely by interchanging atomization fluid inserts. Each replaceable atomization fluid insert includes an inlet for receiving a single gas supply at a fixed pressure. A spiral channel in the insert of decreasing cross-sectional dimension extends from the inlet to an outlet surrounding the streams of molten metal. The channel configuration of each of the replaceable inserts is designed so that a preselected atomization fluid velocity and/or spiral rate is provided for atomizing the molten metal to the desired particle size. Gas jets in a depending cooling tank are used to rapidly cool the particles while keeping them from impinging against the wall of the tank.

Abstract: In the process of forming metal powders by rotary atomization, the atomizer disk is first coated with a stable compound of the molten metal to be poured or, if the metal to be poured is an alloy, the disk is coated with a compound of the base metal of the alloy. The coating compound is selected on the basis of its melting point and that it can coexist with the molten metal to be poured, at the pour temperature, as indicated by phase diagrams of the materials involved. The molten metal is poured onto the coated, spinning disk, couples with the coating, and forms a stable skull of itself over the coating. Fine droplets of molten metal are thereafter flung from the disk, cooled and collected.

Abstract: A method and apparatus for forming a loosely felted mat of elongated wood flakes mixed with a binder, the mat including a longitudinal axis and the wood flakes being aligned in mutually parallel relation and parallel to the longitudinal axis of the mat. The wood flakes are held in alignment in the mat by a plurality of closely spaced thin planar baffles, the baffles being comprised of a material which can form an integral part of the mat.