Abstract: An energy sensitive fusible device fabricated by thick film techniques in which a fuse element is sandwiched between two glazes on a substrate, for use in programming thick film networks.

Abstract: Poly(p-phenylene-trans-benzobisthiazole) and poly(p-phenylene-cis-benzobisoxazole) fibers are rendered more adherent to epoxy resins by treatment with an oxygen containing gas under specified conditions.

Abstract: A polylaurolactam mold is being produced by that a laurolactam melting at first is being mixed with a catalyst and the mixture afterwards being compounded with an activator and polymerized, whereby the polymerizing material is being cast to threads or cords and the reduced material is being injection molded at temperatures of 430.degree. F. to 490.degree. F. and at pressures of 50.10.sup.5 to 100.10.sup.5 Pa, whereby, according to the invention, before the molding 0.1 to 5 wt. % silicon fat is added to the granules. The then resulting molded products, especially protective helmets and protective plates, are distinguished by superior physical properties.

Abstract: A mold and method are provided for molding a pair of hinged articles in a single molding operation. Plastic melt is introduced into a mold containing cavities for a pair of hinge leaves, each of the leaf cavities is provided with a hinge cavity. A pin assembly containing a hollow outer pin and solid inner pin is shifted from a first position wherein the hollow pin engages one of the leaf cavities to a second position wherein the hollow pin clears the outer of the cavities. The hollow pin is vented past the solid pin.

Abstract: A dual-lip shaft seal with two PTFE sealing members bonded to a molded elastomeric body, and a method and mold for its manufacture includes an elastomeric body bonded to the radial flange of a metal case and provides (1) a shaped lip with a garter spring held in a recess and, bonded to its other side, a frustoconical PTFE ring providing its sealing lip portion and (2) an inflexible portion bonded to a radially extending PTFE wafer.

Abstract: This invention relates to an injection molding system of the type wherein a heated probe is centrally located in the hot runner passage. The probe has a pair of circumferentially spaced melt channels, each with an upstream portion which branch out from a common central inlet to a downstream portion along the outer surface of the probe. The probe is seated in a well in the cavity plate and a hollow cylindrical insulating sleeve is located between the downstream portion of the probe and the wall of the well. The outer surface of the probe and the inner surface of the insulating sleeve have longitudinally extending grooves which are aligned to form the downstream portions of the melt channels. The insulating sleeve is formed of a thermoplastic material with low thermal conductivity and a high melting temperature.

Abstract: Melt extruded poly(6-oxy-2-naphthoate-4-oxybenzoate) shaped articles of relatively high strength and modulus are produced in a lesser period of time than commonly heretofore required in the prior art. The required polymer is capable of exhibiting an anisotropic melt phase and is formed through the reaction of 6-acetoxy-2-naphthoic acid and 4-acetoxybenzoic acid under a combination of melt polymerization conditions which surprisingly has been found to yield a shaped article following melt extrusion which may be heat strengthened in an unusually brief period of time (i.e. two hours or less). The polymerization is catalyzed by a potassium salt (e.g. potassium acetate), and the polymerization conditions require a relatively highly elevated final polymerization temperature. Substantially all of the acetic acid by-product is removed from the polymerization zone prior to concluding the polymerization under reduced pressure conditions.

Abstract: A filter device includes an annular filter element having a plurality of wave portions extending outwardly, a central cup-shaped portion arranged at an inner periphery of the filter element, a support frame arranged at an outer periphery of the filter element, and a connecting portion at which both sides of the filter element are abutting on and connected with each other. The central portion, the support frame and the connecting portion are made of synthetic resin and formed as a unitary structure, wherein the outermost and innermost peripheral ends of the filter element are respectively embedded in and held by the support frame and the central portion.

Abstract: An improved process for making a vent for an "in the ear" hearing aid. A cavity is formed which corresponds to the structure of the ear canal and outer ear of the hearing aid user. A molding liquid, such as acrylic, is poured into the cavity. The liquid is allowed to partially cure and form a thin-walled shell inside the cavity. An elongated mandrel is then placed along the inside of the thin-walled shell, and additional liquid molding material is poured into the thin-walled shell around the elongated mandrel. The wall of the shell accordingly becomes thicker, enveloping the mandrel. The mandrel may then be removed, leaving the vent in the wall of the shell.

Abstract: This invention relates to a compression molding method of preparing dimensionally precise highly contoured green bodies from a mixture of beta"-alumina percursor particulate and sacrificial binder. The binder comprises a thermoplastic block copolymer, oil, wax, stiffening molding, the green body may be heated to drive off the sacrificial binder and thereafter subjected to sintering. Such sintered articles are suitable for use in a sodium-sulfur battery.

Abstract: A non-toxic clay pigeon with excellent mechanical and ballistic properties is produced by subjecting a mixture consisting essentially of plaster, an amount of water constituting a considerable amount in relation to the amount necessary for setting the plaster, calcium carbonate and optionally fly ash, and/or heavy spar; as well as one or more surfactants, organic binders, set-controlling agents and brittleness-promoting agents to compression in a clay pigeon mould heated to a temperature in the range of 100.degree. to 160.degree. C. such that the excess amount of water in relation to the amount necessary for setting the plaster is driven off from the mould.

Abstract: A method and apparatus for impregnating reinforcing fibers with a thermosetting resin having a short pot life. The method comprises mixing the components of the resin and supplying the mixed resin under pressure to an enclosed chamber. The reinforcing fibers are pulled through the chamber to rapidly impregnate the fibers with resin and the coated fibers are immediately utilized in forming a molded article.

Abstract: A combination ion sensing and reference electrode and a method for producing it. The electrode is formed of bi-lumen plastic tubing using one lumen as sensing chamber and the other as a reference chamber. A portion of the sensing chamber extends distally relative to the reference chamber, and is permeated with an ion selective material by soaking that portion in a solution containing the ion selective material. The method of manufacture is thereby simplified and sealing of the chambers is improved.

Abstract: A composition of flake graphite, binder clay and a refractory material is extruded from an auger machine into a mold to form a cylindrical graphitic casting nozzle brick. The mold includes a coaxial core terminating short of an extrusion die of the auger machine, so that the graphitic casting nozzle brick as extruded has a longitudinal bore with one end closed, with transverse holes being subsequently defined through the nozzle brick across the bore adjacent to the closed end. As an alternative, a coaxial core may be connected to an extrusion screw of the auger machine to define an axial through bore in the casting nozzle brick as the latter is extruded.

Abstract: A method and an apparatus for continuously filling grooves in metal sash bars with heat insulating synthetic resin are disclosed. The method comprises the steps of closing the opposite ends of the groove of each of the metal sash bars by end caps each having an end wall with a thinned top edge; continuously moving the metal sash bars through a path below an injection device with the grooves facing upwardly and with at least the top edges of the end caps of one preceding sash bar and the succeeding sash bar in close contact with each other on the upstream of the injection device; and continuously injecting a solution of the heat insulating synthetic resin from the injecting device into the grooves of the sash bars at a constant injecting rate while continuously moving the sash bars.

Abstract: A pressure generating device for use in injection moulding at a high pressure or normal pressure where the pressure generating device is attached to the mould, the platens, the tie bars or other suitable parts of the injection moulding machine which device operates separately from the normal pressure generating mechanism and acts on the content of the mould cavity only, said device comprising a pressure generating part, e.g. a hydraulic cylinder (1) connected with a plunger (2) which can bring the pressure inside the cavity to the desired level during an injection cycle and a non-return flow valve (3) or any other element closing the mold cavity from the injection side, and the use of said device in injection moulding at high pressure or normal pressure.

Abstract: Polyester polymer is extruded at different speeds through groups of parallel closely spaced orifices at relatively high spinning speeds. The resulting filament have high and low shrinkage regions substantially regularly spaced apart along their length. A yarn including a number of these filaments spontaneously develops crimp when relaxed.

Abstract: A molded fiber reinforced plastic leaf spring. The spring has a curved central section composed of longitudinally extending fibrous strands impregnated with a cured thermosetting resin. The central section is generally rectangular in cross section having rounded upper and lower edges and a ground-off parting line disposed substantially at the neutral axis of the spring.

Abstract: Process for preparing poly-piperazinamide, anisotropic shaped articles comprising the preparation of the polymer solution in a polar organic solvent, the transformation of the solution into shaped bodies by spreading or spinning, the gelation of the shaped articles by phase inversion, and, optionally, the heat treatment of the gellified shaped articles.

Abstract: A method of manufacturing simulated animal or fish skin includes pouring a silicone compound over a sample of the skin to be simulated as, for example, dried fish skin. After the silicone compound jells, it is removed from the sample as a layer and forms a mold of the skin to be simulated. The mold is then cleaned and covered with a fiberglass cloth. A flex resin compound is poured onto the fiberglass cloth to fill the mold. After waiting a predetermined period of time, the fiberglass cloth is removed leaving behind the simulated skin which may then be painted to achieve realism. The painted simulated skin may then have a backing material such as cloth or vinyl applied thereto and the composite material cut to a desired shape.