Abstract: Improved apparatus for positioning and suspending paraphernalia in a dental negative mould comprising a pair of pins insertable into the mould along the buccolingual midline of the tooth to be made detachable from the remainder of the dental cast or model. The paraphernalia articulates with the pins and is precisely positionable in the mould due to unique structure of the jig assembly and paraphernalia, or tooth die forming member, which permits movement of the latter along or rotation about three different axes.

Abstract: Apparatus for removing a cylinder forming the whole or part of the cylinder of a screw extruder, comprising a supporting arm on one end of which the cylinder is pivotally supported, and a further supporting arm to one end of which the other end of said supporting arm is pivoted, the other end of said further supporting arm being pivotally mounted on a base of the screw extruder. Adjusting means may be provided between the cylinder and the outer support arm to adjust the height and inclination of the cylinder, such adjusting means preferably comprising a plate on the support arm, three adjusting set screws in the plate to bear against the cylinder and securing screws to hold the cylinder in the set position.

Abstract: The mandrel has a cantilever-type mounting and includes a rotatable longitudinally slit tubular steel shell providing a molding surface on which thermosetting resin and glass fiber reinforcing material may be deposited to form tank bodies or pipe. A row of pneumatic actuators mounted inside the shell and spaced axially thereof includes piston rods attached to the shell along the slit on one side thereof. Retraction of the piston rods collapses the shell, which is flexible over the greater portion of its periphery and supported in the flexible portion by a plurality of rows of pivotable turnbuckle connectors or support rods, for removal of a cured tank body or pipe.

Abstract: A blend which contains homopolymers useful for imparting wet and dry strength to pulp and paper fibers which comprises a major amount of non-ionic polyacrylamide, together with glyoxal to impart crosslinking and a cationic regulator selected from the group consisting of a low molecular weight dimethyl amine epichlorohydrin copolymer, a low molecular weight ethylene dichloride ammonia condensation polymer, and a polyvinyl benzyl trimethyl ammonium chloride polymer. A buffer such as tetrasodium pyrophosphate may be used. A dosage of 0.2-5% by weight (preferred 0.5-2% by weight) based on the dry weight of fiber is utilized.

Abstract: Oleaginous and other materials that are difficult to form into aqueous dispersions are rendered easily dispersible in cold water by impregnating particles with them which comprise from about 70 to 99 parts of disintegrated beta-1,4 glucan and from about 1 to 30 parts of water-soluble polymer intimately associated therewith, and especially where the particles comprise from about 85 to 95 parts of disintegrated beta-1,4 glucan and from about 5 to 15 parts of sodium carboxymethyl cellulose.

Abstract: A cement applicator for outside corners such as those used in dry wall construction which includes a container for the cement having an open front and a back wall which is moveable along tracks when pressure is applied thereto to force cement out of the front and into the corner. The tool also includes at least two wheels positioned to track along the edge of the corner to be finished and adjacent wipers which are biased to form an angle less than a 90.degree. angle therebetween about the wheels. The wipers include peripheral seals which in combination with the biasing action and the regulation of the tool position by means of the wheels finish the surface of the cement applied to the corner. The wipers may be of different lengths to provide for corners such as those found on stud walls or around windows.

Abstract: A boron containing burn resistant, low level radiation protection material useful, for example, as a liner for radioactive waste disposal and storage, a component for neutron absorber, and a shield for a neutron source. The material is basically composed of Borax in the range of 25-50%, coal tar in the range of 25-37.5%, with the remainder being an epoxy resin mix. A preferred composition is 50% Borax, 25% coal tar and 25% epoxy resin. The material is not susceptible to burning and is about 1/5 the cost of existing radiation protection material utilized in similar applications.

Abstract: The structural strength properties of concrete and its resistance to sealing are improved by incorporating into the concrete-forming mixture an aqueous solution obtained by admixing polymethylene polyphenyl polyisocyanates with less than a stoichiometric amount of a polyethylene glycol (MW 600 to 3000) or polypropylene glycol tipped with 15 to 85 percent ethylene oxide (MW 1000 to 3500) and, within a short time of completing the admixture but during the period where said mixture is completely soluble in water, dissolving said mixture in water. Optionally, a difunctional extender is added to the solution so obtained in an amount less than that required to react with all the excess isocyanate groups.

Abstract: A jet electrostatic printing process is described which uses a unique ink formulation suitable for use on certain dark colored surfaces. This process provides rapid, automatic, non-contact printing with high contrast on dark-colored surfaces. It is particularly suitable for marking cable with dark sheathing such as carbon-doped polyethylene.

Abstract: Novel thermoplastic molding compositions are disclosed which are based on a rubber modified copolymer of a vinyl aromatic compound and an .alpha.,.beta.-unsaturated cyclic anhydride, and an acrylic graft polymerization copolymer, with or without a polyphenylene ether resin.

Abstract: A sulfur-bituminous composite binder material consisting essentially of 60-75% by weight sulfur and 25-40% by weight bituminous material. Optionally a small amount of a fibrous or flake reinforcing material and usually a filler material can be added. The binder is suitable for use as a self-compacting road or pothole repair material. A feature of the composite binder is the presence of two continuous phases which is achieved by mixing solid particulate sulfur with a softened bituminous material at a temperature in the range 120.degree.-150.degree. C. or by mixing liquid sulfur with liquid asphalt with a sufficient shearing mixing action to produce an emulsion of the liquid sulfur in the asphalt which, on cooling produces a continuous, rigid, crystaline and porous sulfur skeleton in the composite.

Abstract: A binder composition is prepared by hydrolyzing and condensing an organotrihydrocarbonoxy silane in excess water, and thereafter combining this composition with particulate solids, to form a coating composition for metal surfaces which will impart galvanic protection thereto.

Abstract: An aqueous coating composition containing in admixture a water soluble polyester, a water soluble orthoamic acid diamine and minor amounts of other water soluble polymeric coating materials. The water soluble orthoamic acid diamine is prepared by reacting in a suitable solvent for at least one reactant, an aromatic diamine and an aromatic dianhydride with the reactants in the molar ratio of m/(m-1) respectively, where m has a value between 2 and about 7. The diamine is dissolved in a solvent and the dianhydride is slowly added to the solution to form the orthoamic acid diamine. The reaction is carried out at a temperature below that at which imidization occurs. The reaction product may then be made water soluble by the addition of a volatile base such as ammonia or a volatile amine. Water solutions of polyester resins and the orthoamic acid diamine are utilized to produce coatings on substrates such as magnet wire.

Abstract: A temperable screw extruder for the continuous extrusion of thermoplastics materials wherein to increase the working and cooling of the material in the extruder without excessively increasing the length of the extruder means are provided to convey the material in a direction transverse to the axis of a main screw away from said axis and then to convey it back theretowards. Preferably said means comprises, located between the main screw and an extrusion outlet orifice, a transverse screw disposed in a transverse cylinder chamber to direct the plastics melt outwardly transversely to the axis of the main screw, a connection passage at the end of the transverse chamber to a downstream further transverse chamber having a further transverse screw therein to convey the material back towards the axis of the main screw.

Abstract: A device is disclosed for setting and securing a threaded member that is to be fixed with casting material in a recess or hole in laminar composite board-like members, such as those of honeycomb construction. The threaded member is of the type having a flange-like head to be located closely adjacent the plane of the outer skin of the composite material, and having a female threaded body extending into the recess with clearance, such that casting material injected into the clearance around the body will harden to secure the threaded member in the recess. The flange-like head has charging and venting openings for the injection. The setting device comprises a plate-like body formed with corresponding charging and venting openings, but of larger diameter than the recess opening, such that the device can be intimately applied with its underside against the flange-like head of the threaded member.

Abstract: The present invention relates to a process for the preparation of aqueous dispersions or solutions of polyurethanes which have urea end groups and contain non-ionic hydrophilic segments and which are capable of being cross-linked with the aid of cross-linking agents which are reactive with urea groups, characterized in that prepolymers which have isocyanurate end groups and which(i) have an average molecular weight of less than about 15,000 and(ii) contain from about 2 to 30%, by weight, of ethylene oxide units corresponding to the following formula:--CH.sub.2 --CH.sub.2 --O--within a polyether chain (containing ethylene oxide units)are reacted at from about 10.degree. to 70.degree. C.

Abstract: Cement compositions which are the products obtained by mixing together and allowing to cure a hydraulic cement, a silica filler, water, an organic polyisocyanate and a polyol, the organic polyisocyanate being employed in an amount sufficient to provide an excess of isocyanate groups over the hydroxyl groups of the polyol. The compositions are particularly suitable for flooring applications and the mixtures, once made up, set very rapidly.

Abstract: A method and apparatus for forming molded ice sculptures includes a selection of molds fabricated of form retaining, flexible, resilient plastic material. Each mold includes holes in the base thereof through which supporting wires are placed. The mold is inverted, base up, within a box slightly larger than the mold, with the wires impinging on the box and supporting the mold. The mold is filled with water and frozen. Thereafter the mold is removed from the box, the wires removed from the mold and the mold stripped from the frozen sculpture.

Abstract: Apparatus for shaping strands of material used in confectionery production with a pair of rollers forming the bottom of a hopper for delivering material. The rollers are formed of smooth surfaces between which a gap has been left. In the gap a strand formation device adapting to the surface of the two rollers, has been inserted. The device is formed from a comb-like insert which, with its lateral boundary surfaces, conforms to the cylindrical surfaces of the two rollers. In the surface facing the intake roller there are grooves or passages 10 which run in the peripheral direction of the rollers and shape the composition into strands.

Abstract: A die assembly includes relatively movable first and second dies, and a plurality of guide pin assemblies mounted on the first die and an equal plurality of aligning passageways formed in the second die for receiving the respective guide pin assemblies. Each of the guide pin assemblies includes a first section mounted within the first die, and a second aligning pin section connected to the first section. Each aligning pin section extends above the surface of the first die for entering one of the plurality of aligning passageways for aligning the first and second dies. Each aligning pin section is detachably connected to a first section and is detached after the first and second dies have been aligned and are ready to be used. In this manner, when the first and second dies are differentially heated during use, the problem of scoring or damaging the aligning pin sections is avoided.