Abstract: Hollow filaments, which are suitable for use in separating one or more components from a fluid mixture by selective permeation, are embedded, or potted, in a curable resinous mass, and the resinous mass is severed to expose fluid communication openings of the hollow filaments. In accordance with the invention the curable resinous mass is sufficiently partially-cured to provide a solid mass which can be severed but does not tend to smear when severed so as to obstruct fluid communication openings of the hollow filaments; however, the partial curing is insufficient to render the severings of the resinous mass unduly difficult. The resinous mass is then severed, e.g., by cutting, to provide the fluid communication openings in the hollow filaments embedded in the resinous mass.

Abstract: A method of molding a cellulosic fiber containing board at a temperature of at least 525.degree. F. to provide a relatively high density skin on at least one surface. A fibrous composition, including cellulosic fibers, is consolidated to form a blank having a density of less than 35 pounds/cubic foot. The blank is then cut to a shape larger in at least two of its three dimensions than corresponding dimensions of a mold cavity when said mold is in a closed position. Urea is then included in at least a surface layer of fibers of the blank in an amount of at least 5% based on the dry weight of the fibers contacted with urea, and thereafter the cut blank is molded to form a contoured product having a skin on at least one surface thereof, the skin defined by a thickness of material on said surface of said product having a density greater than the material on which the skin is formed.

Abstract: Six-sided furniture parts are manufactured by pressing a cellulosic fiber-containing mat to consolidate said mat into a unitary blank, cutting the blank to a size larger than interior dimensions of a closed mold in every dimension and with two to four generally shaped or profiled edges disposed between a top surface and a bottom surface of the blank. The cut blank is then molded at a temperature of at least 500.degree. F. for a period of time sufficient to permanently transfer the interior shape and design of the mold cavity to every surface of the blank.

Abstract: A compact in the form of a strip is manufactured from metal powder by introducing the powder into the gap between a pair of rotatable rolls. The compact so formed has unwanted longitudinally extending edge portions and these portions are removed by reducing them to powder to substantially the same particle size as that of the powder from which the compact is formed. The portions are conveniently reduced to powder by engaging them with rotary members in the form of cutters which impact the compact and break off individual particles. The powder may be recycled into the roll gap either directly or after further treatment which does not include comminution of the powder.

Abstract: A process for the manufacture of fire protection materials, in which an aqueous alkali metal silicate solution is dried to a water content of from 6 to 40% and the resulting powder is thermoplastically molded to form sheets, tapes or strips. These can be fitted into openings and passages of building units; in the event of a fire they eliminate water and form a stable, heat-insulating foam.

Abstract: Highly purified metal halide salts are made into a frangible stick having uniformly spaced lines of weakness which permit the stick to be broken readily into cylindrical pellets of uniform size. The pellets are particularly useful to supply the vaporizable fill in high intensity metal halide discharge lamps. The stick is formed by intermittently loading salt powder into the sized entrance to a channel through which the salt is forced, and compressing the charge against the back end of previously formed salt stick by means of a polished plunger.

Abstract: Apparatus for separating a sheet of briquets issuing from a briquetting machine into individual briquets by bending the briquet sheet both longitudinally and transversely to break the connections between adjacent briquets. The apparatus includes a carrying conveyor having arcuate, waveform or sawtooth conveyor slats and a conforming conveyor having conveyor slats with a cross section which mates with that of the carrying conveyor. The conforming conveyor forces the briquet sheet to conform to the slat configuration of the first conveyor and to pass around a pivot means which breaks or separates the sheet into individual briquets.

Abstract: The disclosure relates to the production of multi-ply battery separators utilizing mats of melt-blown, randomly laid, self-bonded thermoplastic resin fibers. The process involves the production of at least three separate plies of self-bonded, melt-blown thermoplastic fibers, which are joined in the absence of separate adhesive materials to form a cohesive, multi-ply material. The multi-ply material comprises an internal structure having fiber size, porosity and other characteristics particularly suitable for use in lead-acid battery separator application. The outer plies are formed to have characteristics more suitable for strength and abrasion resistance. In the process of the invention, the several plies are separately formed by melt-blowing techniques, in themselves known, and the several plies are joined in the presence of heat and/or heat and pressure, forming a multi-ply structure entirely free of external adhesive material.

Abstract: A method for agglomerating particulate steel mill wastes such as roll scale and coke fines, and for utilizing the agglomerate in a metallurgical furnace. The wastes are mixed with Portland cement and cast into slabs which are thereafter broken and screened to a size which can be charged into a metallurgical furnace by automatic handling and weighing systems.

Abstract: A stable block is formed of shredded paper or paper-like material (herein after referred to as "paper") and a binder such as ligninsulfonate. The block is formed by shredding paper, mixing the shreds with a binder such as ligninsulfonate resin, and placing the same in a heated matrix of a die; and while in the die, subjecting the mixture to high pressure.

Abstract: The fibrillated surface layer of an unsintered extruded mass of a polytetrafluoroethylene is broken by mechanical or electrical force to facilitate evaporation of the lubricant whereby a molded article which is free from defects such as cracks and blisters is obtained upon sintering.

Abstract: An improved acoustical and trim acoustical panel suitable for use in the interior passenger compartments and exterior components of automotive vehicles or the like, comprising a plurality of fibrous layers of controlled different density, integrally united together at their interfaces and optionally provided with a decorative finish on one or both outer face surfaces thereof. The invention is further directed to novel methods for making such trim panels incorporating preselected contours and localized embossments therein to conform to the contour of the structural panels of vehicle bodies over which the trim panels are adapted to be mounted. In accordance with one process embodiment, a fibrous pad is formed incorporating suitable binding agents and a coextensive impervious membrane or film disposed intermediate of the face surfaces thereof.

Abstract: Moisture-containing nylon-4 powder is treated under heat and pressure to produce a solid material of bulk density suitable for melt-spinning.

Abstract: Toothpaste compositions containing wax or gel agglomerates of nontoxic pigment particles and a process for preparing such agglomerates by dispersing pigment particles in a molten wax, solidifying the wax dispersion by cooling same, and reducing the resulting agglomerates to a desired particle size. The agglomerates of colored particles serve to impart a distinctive and pleasing appearance to toothpaste compositions.

Abstract: Hay and similar crop materials can be efficiently compacted and formed into pellets or cubes through a closely coordinated sequence of operations in which the hay picked up from the field is deposited into a feed bin, then advanced by gravity feed uniformly onto a cross feed conveyor which advances the hay through a compaction stage in which the hay is precompressed to bale density, and thereafter it is continuously advanced between a pair of counter-rotating press wheels which further compress and form the hay into dense pellets or cubes.

Abstract: A method of forming a conductive carbon-plastic material having increased surface area and enhanced surface conductivity characteristics is described. A conductive carbon-plastic material is molded from a mixture containing particulate conductive carbon and plastic material. The surface of the resulting conductive carbon-plastic material is simultaneously abraded and embedded with carbon particles by the projection of a dry mixture of compacted carbon and metal particles against the surface by means of propulsion. This dry mixture of compacted carbon and metal particles is obtained by ball milling a mixture of specified amounts and sizes of carbon and metal particles. Zinc metal particles are preferred.

Abstract: A method of manufacturing covering plates, particularly thin, flat and rigid plates, employing hard materials which are previously granulated or reduced to powder, agglomerated with the aid of synthetic resins, comprising the steps of:(a) depositing on a conveyor belt a layer of binding agent, containing hard purverulent matter and dyes,(b) depositing cleaned granules on the layer of binding agent,(c) depositing base granules on the preceding layer,(d) pressing vibro-compressor rollers on the strip thus formed,(e) passing the strip into a polymerization furnace,(f) removing the excess granules by suction,(g) stripping the strip from the belt and effecting the finishing and checking operations.

Abstract: A method for preparing a fiber-reinforced, thermoplastic composite, wherein the fiber is randomly oriented and the fiber length and integrity is maintained, which leads to better mechanical properties and fiber dispersion in manufactured articles prepared from said composite.

Abstract: A method of making a mold by the use of sand is started by filling a mass of sand in a mold jacket which is in turn rammed to provide a block of sand. The sand block thus formed is excavated by a cutting device to form a mold cavity. The cutting device is guided by a profiling machine in accordance with a predetermined program which describes the shape of an ultimately desired casting to be manufactured by the use of the sand mold.

Abstract: This invention relates to a process for agglomerating a finely divided material with a rubber latex to form dustless, free-flowing granules in which rubber latex is sprayed onto a dampened finely divided material while the dampened finely divided material is suspended in a gaseous medium.

Abstract: Granular active alumina with high mechanical durability is made by activation of an aluminum hydroxide with an apparent density in the green granular condition of at least 2.20g/cm.sup.3. The green aluminum hydroxide is subjected to compacting by dry compression before activation by a usual heat treatment. Compacting is preferably by running between two rollers.

Abstract: An extrudate cutting device comprising(a) a frame means,(b) attachment means mounted on said frame means for attachment thereof to the extrusion end of an extruder,(c) second attachment means mounted on said frame means and adapted to receive a rotatable elongated cutting means and(d) elongated cutting means rotatably mounted on said second attachment means and a method of cutting extrudate into substantially identically sized sections, are disclosed.

Abstract: A method of manufacturing a dry-formed, adhesively bonded, nonwoven fibrous sheet and the fibrous sheet formed thereby.

Abstract: An electrical resistor is manufactured by molding a mixture of the powders of tetrafluoropolyethylene, carbon and metal and then sintering the molded body. Terminals comprising a mixture of a powder of tetrafluoropolyethylene and a powder of soft metal are provided by simultaneously molding a lamination of the first mentioned mixture and the second mentioned mixture.

Abstract: A method of preparing an antibiotic composition which imparts stability to the antibiotic when used in an animal feed.

Abstract: A process for manufacturing a unique fire retardant particleboard includes the supersaturation of wood chips, followed by spraying of the wood chips with an aqueous solution of borate and sulfuric acid, after which the sprayed wood chips are allowed to stand for a period of time to become impregnated and saturated with the aqueous solution. The impregnated wood chips are then allowed to dry, after which a urea formaldehyde adhesive is applied to the wood chips, and the chips are consolidated to form the fire resistant wood particleboard.

Abstract: Method and apparatus for the briquetting of metal swarf, pellets and powders on roller presses having briquetting rollers which are provided with moulding depressions on their cylindrical surfaces by which a briquette extrusion is formed having alternating briquette mouldings extending from one or other side of the extrusion and arranged in a chequerred pattern, each briquette moulding having a plane face on the opposite side of the extrusion. The extrusion is separated into individual briquettes by a surface pressure applied to the extrusion substantially at right angles to the plane of the extrusion.

Abstract: A process for pelletizing sorptive mineral "fines" which includes adding sufficient moisture to the particles of sorptive material to occupy the pore space therein, compactly forming the moistened mineral in a pelletizing machine, then removing the pore moisture in a suitable dryer or kiln so that final pellets retain relatively the same absorbent capacity and bulk density as the original material.

Abstract: An improved process is described for producing glass in which a glass batch is mixed with a binder, aged, compacted, and compressed into briquettes, which are heated to partially react the contents of the batch in a prereaction stage. Prereacted briquettes are then placed in a fuel-fired furnace and heated at a temperature not above 2,600.degree. F (1,430.degree. C) to refine them into glass.

Abstract: A succession of rectangular mats, consisting essentially of asbestos fibers or other filamentary material held together by a wet hydraulic binder such as cement, are conveyed by a series of trays through the gap between a pair of horizontal platens of a press. The upper platen carries a die for trimming the edges of a mat to be compacted, with the tray acting as an anvil. The trays are linked near their leading ends with two parallel, endless conveyor chains and have their trailing ends supported by rollers on rails which parallel the upper and lower runs of the chains and which form ramps for guiding these rollers onto the lower level downstream of the press and onto the upper level upstream of the press whereby each tray runs horizontally through the press between a loading and an unloading station.

Abstract: A method of moldng a product which involves delivering a supported body or mass of material that may be molded such as mineral fibers impregnated with a binder into a contoured molding facility, the body or mass of material being compressed and shaped to the mold contour, the binder set or cured and the molded product removed from the mold concomitantly with the advance of a succeeding supported mass or body of moldable mineral into the molding facility.

Abstract: A method of providing a fibrous thermoplastic resin for depolymerization thereof wherein the fibrous thermoplastic resin is formed into a shaped article having a specific gravity of at least 1/2 of the true specific gravity of the fibrous thermoplastic resin, said shaped article consisting of the fibrous thermoplastic resin mass having on its surface a crusty thin resin layer which may be press-bonded or melt-bonded to the mass. The thus provided shaped article of the fibrous thermoplastic resin can be advantageously employed as a starting material for the depolymerization reaction. In accordance with this invention, the time required for completion of the depolymerization can be greatly shortened as compared with that of the conventional technique and the rate and efficiency of the depolymerization can be greatly improved.

Abstract: Loose material such as iron ore may be formed into a briquette sheet and separated into their individual briquettes by applying impact forces on opposite sides of the briquette sheet and to next adjacent briquettes.

Abstract: A method of making animal litter consisting of grinding peanut hulls into a size that will allow the ground hulls to pass through a one-sixteenth to a one-half inch sieve. Mixing the ground hulls with a ground vegetable product such as alfalfa, broom grass, or a like product containing chlorophyl to give the mixture not less than one percent chlorophyl content. The mixture is subjected to a steam bath to moisten and soften the hulls and the added product which are then forced through a die to form the mixture into small pellets. The moisture in the pellets is reduced by heating as they pass through the die thereby removing at least eighty percent of the moisture.

Abstract: A tobacco smoke filter element for use in cigarettes, cigarette holders, cigar holders or pipes is formed from a bonded non-woven fabric composed wholly or partly of wool fibers. It is preferred that the content of wool fibers shall be as high as is economically feasible. It is preferred that in the case of a filter for a cigarette the filter is made by converting a web of bonded non-woven fabric to a filter rod of substantially circular cross-section.

Abstract: A process for preparing improved glass fiber reinforced thermoplastic compositions, the products produced thereby, and articles injection molded from the thermoplastic compositions. The process includes mixing and plastifying a powdered thermoplastic resin containing glass fibers in a screw extruder, milling the plastified resin-glass blend into a sheet on a hot roll mill, and dicing the sheet into pellets. The pellets are particularly suitable for use in forming articles by injection molding.

Abstract: This invention generally relates to the production of alkali metal silicates. More particularly the invention relates to the production of compressed alkali metal silicate granules of desirable density and particle properties.