Abstract: A method contemplated by the present invention for producing semi-finished prosthetic dental preforms essentially comprises the steps of repulverizing a dental porcelain mixture including a suitable binder by spray drying such dental porcelain molding the repulverized dental porcelain mixture in a die member having a cavity with a form generally complementary to that desired for the molded product, removing the molded product from the mold; and applying an outer coating of a suitable second dental porcelain to selected exterior surfaces of the molded product. The binder for the ceramic material comprises 10.5% to 8.5% ethylene vinyl acetate resin, 5.3% to 3.9% mineral seal oil and about 2.2% to 1.6% stearic acid.

Abstract: The invention relates to a process for mounting in particular electronic components on a base by means of thixotropic material whereby the material is transferred to the base by dipping a die and the component in a stock and then pressing the component on the material layer thus produced whereby the dipping and/or pressing motion of the die or the component is superimposed by a vibration for liquidefying the thixotropic material.

Abstract: A plastic foam core concrete plank and the method of making same is described which employs foamed plastic core forming members positioned on an initial layer of concrete in a forming pallet and held translationally and vertically in position relative to the initial layer of concrete as a top layer of concrete is poured into position around and over the core members to complete the slab. The core members have a plurality of discontinuous recesses extending from one surface thereof which are exposed to the lower or initial layer to create voids in the slab for light construction and to decrease the thermal transmissions therethrough.

Abstract: The method of rigidifying portions of flexible structures comprised in part or wholly of yarns comprised of man-made fibers of filaments wherein the fibers or filaments of the yarns become welded to each other, specifically to a method of welding the constituent yarns of shoelaces at the ends of the laces so as to form rigid tips of reduced cross section at the ends; to joining two or more yarns at predetermined intervals to form a compound structure; and to joining parallel or crossing portions of yarns arranged in a predetermined relation to each other to form a dimensionally stable structure, by means of sonic vibration supplemented by pressure; and to apparatus for carrying out the method.

Abstract: A series of mold cavities are made up of side plates which are pivoted on vertical offset hinges and each is movable one toward the other to define the mold cavities into which concrete is poured to form the slab. Certain of the vertical side walls have integrally related lateral wall elements which separate the side walls and complete the enclosure for the mold cavity. After the slabs have hardened, the side walls are forced apart by prying them at their upper corners causing each in turn to pivot on its respective axis and thereby opening the individual mold cavity and allowing withdrawal of the hardened slab therein.

Abstract: The invention relates to the manufacturing of suspension insulators of the type comprising essentially a body made of a dielectric material, a metallic cap and rod sealed to said body. The method according to the invention is characterized in that during sealing of the rod in the inner cavity of the body and of the cap on the body head, said body rests on a supporting table and undergoes by vibropercussion a vertical vibrating motion superimposed on a tilting motion with a rotating axis of tilt, said supporting table remaining isolated from the vibrations during the whole sealing operation. Application in particular to the manufacturing of heavy insulators for electric power lines.

Abstract: A process for transferring dyestuff from a transfer paper substrate to a sealed area on a laminated textile material such as a quilt. The process makes possible, for example, the simulation of a colored thread stitch by coloring the sealed area as the seal is performed. Normally, the sealing is accomplished by ultrasonic means, but other forms of energy for sealing purposes may be utilized.

Abstract: Polymeric fibers are produced from a polymer-solvent solution without mechanical agitation means by supplying a polymer solution in a solvent to a radial-symmetrical mixing chamber and causing a rotary flow therein which subjects the polymer to shearing forces while, at the same time, adjusting the temperature of the polymer-solvent mix to just below the precipitation temperature of the polymer. Under these conditions a polymeric fiber precipitates which, after separation from the solvent, is useful in the preparation of paper and textile products.

Abstract: A method of forming a multilayer blanket of wood particles adapted to be pressed into particle board in which a particle separator scatters the wood particles in separate streams by particle size. The finest-particle streams are deposited directly, i.e. without interception while the fine and coarse particle streams are intercepted by downwardly inclined plates formed with parallel channels for guiding the respective particles into separate layers on a moving support to form the blanket. The plates are vibrated so that the individual particles are oriented as they pass along the respective channels.

Abstract: A method for producing a tubular multi-layered porous barrier comprising the step of depositing fine powder onto at least one of the inner and outer surfaces of a sintered tubular porous support member in a layer of uniform thickness to form a fine powder layer and pressurizing said powder layer against said support member to form a porous barrier layer on the support member.

Abstract: Hydraulic cement or the like is poured into a closed mould under a reduced pressure condition to a level slightly higher than a predetermined level. Coarse aggregate and steel rods are prepacked in the mould. After pouring the pressure in the mould is increased to atmospheric pressure or a higher pressure to force the hydraulic cement above the predetermined level back into the space below the level thus compacting the poured in hydraulic cement. A cushion device is provided for the pouring device. An overflow tank is connected to the mould to observe the level of the poured cement. The pressure in the overflow tank is also decreased during pouring and increased after pouring.

Abstract: A method and apparatus are described for the making of a three dimensional filament reinforced foam insulation member. Generally parallel arrays of vertically stacked fabric or cloth having filaments running in an X-Y axis are reinforced by third axis Z directional filaments pre-cut to a desired length and inserted down through openings referred to as vertical columns hereinafter through the said array. The Z filaments are air directed through the stack of open weave. After the formation of the filament reinforced weave the assembly is impregnated with foam to form a unitary member. The apparatus to form the article and carry out the method above consists of a conveyor carrying stacked open weave fabric through an open ended enclosure wherein there are provided first vertical tubes and second vertical tubes. The second vertical tubes are injected into the stack or array of open weave. The first vertical tubes are telescopically inserted into the tops of the said second vertical tubes.

Abstract: A method of producing shaped concrete blocks for hydraulics, such blocks having two spaced arms formed at right angles to each other and spaced from each other and a web interconnecting the centers of said arms, wherein said block is formed by concreting in a dismountable shuttering with the arms located horizontally and the web vertically, it being possible to use a shuttering having a stationary, lower shuttering part which has a horizontal longitudinal axis for forming substantially half of one arm of the block and two shuttering parts separatable from the formed block by lateral movement.

Abstract: The preparation of three dimensional skeletal structures using the step of deforming rounded beads to form a mold or matrix is described. A filler material is introduced and then rigidified to form the skeletal structure. The deformable beads are composed of materials which deform upon compression or expansion due to pressure from adjacent beads and included, for instance, metals, waxes, salts, polymers, and ceramic compositions in their plasticly deformable states. The filler material which rigidifies to form the skeletal structure can be composed of solidifiable materials such as metals, polymers, or ceramic compositions. The solid material volume of the skeletal structure so formed upon removal of the beads is between about 2% to 20% of a corresponding volume of a non-skeletal solid material. The corresponding porosities representing the interconnected void volumes are between about 80% and 98% of a corresponding volume of a non-skeletal solid material.

Abstract: A stylus is assembled from a plastic tip having an axial bore and an ink tube in said bore centered therein and welded thereto. Ultrasonic welding is used for softening and partially melting the tip. On switching off the ultrasonic energy source, the molten portion of the tip hardens and provides a strong bond between the tip and the ink tube.

Abstract: A load-bearing wall panel is fabricated by disposing an assembly of spaced-apart and aligned, hollow-cored bricks onto a molding base containing melted paraffin. Contact of the cooler bricks with the melted paraffin forms a thin skin of solidified paraffin on the brick bottom portions and forces melted paraffin within the joints forming therein a double-convex configuration of solidified paraffin, thereby water-proof sealing the brick bottom portions and joints preparatory to mortar introduction. After curing of the mortar introduced in the joints and cores, the resulting wall panel has load-bearing capacity and unique, double-concave mortar joints that are smooth, water-proof and weather-proof.

Abstract: The production of permanent magnets by a method including the injection of a slurry of magnetic material into a fixed capacity mould from which excess water can escape through a filter, the injection of the slurry being effected at a pressure sufficient to achieve the required density of finished compact.

Abstract: The invention refers to a method of forming over the edge of a plastic jacket against a workpiece using vibratory energy. Specifically, the workpiece and jacket are disposed on a resiliently mounted anvil. As the jacket forms over and shortens its axial length, the anvil is displaced to provide a decreasing engagement force between the jacket and the horn of the vibratory apparatus. As a result, the jacket is free of scars or distortions in the region of forming.

Abstract: Two telescopingly engaging tubular thermoplastic workpieces are welded together by ultrasonic vibratory energy applied radially. The workpieces are disposed on a mandrel for preventing distorting or collapsing of the opening in the inner workpiece. A tapered hole in the ultrasonic tool in combination with an axial force upon the workpiece provides a radially compressive force upon the outer workpiece to cause intimate contact between the softened workpiece surfaces during welding.

Abstract: Spacing core materials, such as honeycomb, may be filled with fiberous insulation batting by placing the spacing core on a vibrator over the batting. The lower edges of the core cut through the fiberous material and permit it to fill the core. Additionally, a vacuum from the top side uniformly distributes the material in the core cells in an expanded condition.

Abstract: Slide-fastener stringers are made by extruding continuous strands of synthetic resin in a form having a plurality of cavities open on one side and defining the coupling head, shank and connecting portion of a multiplicity of coupling members which together form a coupling element adapted to be mounted along the edge of a support tape. An embossing tool is thrust into the connecting members and/or the shanks of the coupling members so as to plastically deform the thermoplastic material and produce humps along the surfaces of the coupling element which are thermally bonded to the support tape.

Abstract: A pipe of concrete, cement mortar or other cementitious material is formed by an integrally cast cementitious mass which is reinforced with a glass fibre strand or roving forming a substantially helical winding extending around the pipe and incorporated in the cement matrix of the cementitious mass. Preferably there are two windings, one incorporated in the outer periphery of the mass and the other incorporated in the inner periphery of the mass. The pipe is preferably made by a centrifugal casting operation in which a centrifugal casting mould is rotated and the glass fibre strand or roving is fed from a feeding device within the mould and is caused to adhere to the internal peripheral face of the mould and then the feeding device is moved axially along the mould as the mould rotates so that the winding is formed from the roving around the internal peripheral face of the mould.

Abstract: The invention relates to an ultrasonic welding, apparatus for a flexible fluid container fabricated of synthetic thermoplastic material having a welding surface, thin walls and a rim, and closed but for a single opening for fluid-tight welding of the connecting piece into the container, which is also fabricated of synthetic thermoplastic material. A welding ring focusses the ultrasonic energy to the welding surfaces. A ring-shaped base terminates the connecting piece.

Abstract: In a dental model, a plurality of parallel non-tapered guide pins are slidably seated within cylindrical cavities in an apertured retainer. Extending sections of the guide pins are secured within removable cast teeth, whereby the guide pins and their mating cavities permit withdrawal and replacement of the removable cast teeth while maintaining the alignment of the removable cast teeth with respect to the dental model.

Abstract: Bundles of fibres are sealed into gaps by surrounding them at the gap with a pool of a sealing material, and longitudinally vibrating the bundle to work the sealing material between the fibres. The fibres may be hollow fibres used for reverse osmosis.