Abstract: The invention discloses a method by which a fluid heat reactive resin system is formulated below the melting point of the resin. This permits the application of coatings and the formation of shapes and powders from the fluid heat reactive system. Liquefied gases are used to solvate resins so that curing agents, hardeners, pigments and flow control agents, and especially curing agents which are too reactive to be mixed with the resins above the melting point of the resins may be dispersed in the resins. After dispersion, the fluid heat reactive resin system remains in a deformable state under ambient conditions for a transient processing time. The transient processing time is established and maintained by the inclusion of plasticizers and high boiling solvents in the heat reactive resin system.
Abstract: An assembly for facilitating the recording of golf scores adapted to be secured to a golf bag or clothing of the scorer. The assembly includes holders for a pencil and a golf score card which are affixed to the distal ends of separate cords that can be retractably withdrawn from spring loaded storage reels.
Abstract: The surfaces of particulate polymers are modified by tackifying the surfaces with a liquid that is normally a gas at room temperature. The treatment is carried out while the gas is in its supercritical range and the surfaces of the particulate polymers are at temperatures below the glass transition temperature (Tg) of the polymers. The surface modifications can include adhering solids to the surfaces, altering the surface configuration of the particles and increasing the size of the particles by controlled agglomeration.
Abstract: A railroad switch stand for moving a pair of switch points between two rails includes a vertically disposed spindle rotating about its principal axis and terminating adjacent its lower end in a stub shaft in which the spindle has a necked section of reduced diameter above the stub shaft including vertically aligned bench marks inscribed on the spindle immediately above and below the section of reduced diameter of the shaft, a horizontal crank threadingly engaged with the stub shaft and a connecting rod.
Abstract: An improvement in a railroad switch stand of the general type in which a vertical spindle is mounted for rotation within a switch stand housing, a horizontally extending connecting rod is operatively connected at its one end to railroad switch points and at its other end to a crank, the crank is carried by a hub, the hub is mounted at the lower end of the spindle for rotation with the spindle and the hub is held in a fixed vertical position on the spindle by means of a cross pin that passes diametrically through the spindle and the hub. The improvement of the invention being a safety plate positioned immediately below the spindle to prevent the hub from sliding off of the spindle should the cross pin fail.
Abstract: A wall mounted closed container for storing and dispensing single coffee filters one at a time from a stacked nest of basket type coffee filters. The container has top and a bottom hinged cover plates to provide access to the container. The top cover plate has an interior spring clip that, in cooperation with a friction block mounted on the inside of the container, are adapted to grip a nest of basket coffee filters and retain the filters in a doubled over orientation with respect to each other when the top cover plate is in a closed position. The lower cover plate may be opened to provide access to the ends of the doubled over coffee filters as by grasping with ones fingers.
Abstract: An identification device is disclosed comprising a display area for recorded indicia that is located between a first and a second end. The first end includes three or more equally spaced apart holes and the second end includes three or more equally spaced holes. The device is an improvement over the prior art in that the equal spacing on the first end is different than equal spacing on the second end by which means closer adjustment of the circumference of the band can be obtained without spacing the securing holes on either end so close together that they may be easily torn.
Abstract: Methods and means for grinding materials to fine powders in a media mill in which the materials are ground while immersed in a liquid. In the preferred embodiments, the liquid is a gas at room temperatures and pressures, the materials are resin mixtures and the fine powders are predominantly in a size range of from about 10 to about 40 micrometers. Other benefits may be achieved if the gas is in a supercritical state.
Abstract: A method for the anionic polymerization of a lactam which produces an nylon having a surface resistivity of between about 10.sup.6 to about 10.sup.12 .OMEGA./.quadrature.. Miscible antistatic agents are mixed with the lactam and the moisture concentration in the lactam is adjusted to about 0.4 wt %. When required to complete the polymerization, the initiator concentration in the lactam is adjusted to about 1 wt %.
Abstract: Alloys of nylon 4.6 having good thermal stability above their melting points and a broad range of desired properties are prepared by melt mixing nylon 4.6 with at least one other nylon and a nylon copolymer. The inclusion of a copolymer in the alloy provides unexpectedly large increases in ductility and toughness.Alloys can be formulated with a unique combination of properties including, for example, elongations of at least 100%, Gardner impact strengths of at least 30 joules, tensile strengths of at least 80 MPa, and heat deflection temperatures of at least 85.degree. C.
October 29, 1993
Date of Patent:
November 14, 1995
Howard A. Scheetz, Gerhardus J. A. deVrught
Abstract: The molecular weight, melt viscosity and melt strength of nylon 4.6 are increased by a solid phase polymerization process conducted under anhydrous conditions at temperatures below the melting point of the nylon. In a preferred embodiment, the nylon used in the process is free of surface air, has a moisture content less than 0.2 wt %, preferably less than 0.02 wt %, and more preferably less than 0.01 wt %. It is also preferred that the extractable impurities are less than 0.2 wt %, preferably less than 0.02 wt %, and more preferably less than 0.01 wt %. The nylon 4.6 product of this anhydrous process is characterized by molecular weights in excess of 50,000, melt viscosities in excess of 600 Pascal.seconds, relative viscosities in excess of 160 and degradation ratios of 7 or less.
Abstract: Block copolymers of nylon 4.6 are made by the solid phase polymerization of an alloy of nylons, including nylon 4.6, blended above the melting point of the nylons and then polymerized in particulate form under anhydrous conditions below the melting point of the nylons in the alloy. The block copolymers are characterized by their novel combination of properties which may include good melt strength, high melt viscosity, ductility (elongation), toughness (impact strength), good tensile strength and tensile modulus, high heat deflection temperatures, low crystallinity and high melting points.
Abstract: A method for treating water with ozone in which a countercurrent flow of liquids is established within a treatment vessel to insure intimate contact and substantial contact time between ozone and water. The ozone and water are first pre-mixed by passing the ozone through a diffuser into a moving stream of water and the mixture is circulated in a tortuous path through a coil and discharged at the end of the diffuser coil through a number of orifices into the lower portion of the treatment vessel in a generally upwardly and outwardly direction with respect to the vertical axis of the treatment tank. Treated water suitable for bottling and storage is withdrawn from the bottom of the treatment vessel at an elevation below that of the discharge orifices to establish a countercurrent flow between the incoming and outgoing fluids.
Abstract: A method for the manufacture of shock attenuating, low rebound polyurethanes in which polyols are reacted with polyisocyanates having a functionality of at least 2.3 at an isocyanate index of from about 65 to about 90.
Abstract: An insole for high heel footwear is designed to provide comfort and support cushioning and significantly reduce shock and vibration through the skeletal system. The insole is comprised of a relatively thin layer of open cell, flexible, resilient foam of low compression set, a heel bucket which extends into the heel of the shoe or an implant which is posiitoned at the heel and a metatarsal insert. The heel bucket or implant, and the metatarsal insert are formed from a shock absorbing, viscoelastic polyurethane elastomer to moderate the accleration of heel and metatarsal strike generated shock waves.
Abstract: Nylon molding powders are prepared by melt blending a nylon with a minor amount of a heat reactive polyimide resin. The mixture is cooled and ground and mixed with the desired filler. The heat reactive polyimide increases the melt viscosity of the nylon during subsequent melt forming of shapes so that the filler particles are not wet out or their interstices filled leaving them as discrete clusters of filler material held in pockets in the nylon/polyimide matrix. By these means, the filler material is more effective in contributing desired properties to a molded article.
Abstract: A hose assembly of limited conductivity designed to bleed static electric charges such as encountered in paint spraying. The assembly includes, as is conventional, a stem fitting 1, a reinforced hose 3 fitted over the stem 7 of the fitting 1, and a crimped shell 5. The novel element is a conductive coupling ring 13 that is adapted to establish an electrically conductive path between the hose coupling 1 and the conductive element 26 of the hose 3. The conductive coupling ring 13 includes a number of tines 19 and, when assembled between the coupling 1 and the hose 3 will, on its one side, seat against a shoulder 11 of the coupling 1, and the tines 19, on its other side, will penetrate the reinforcement 23 and 24 of the hose 3 and establish electrical contact with the conductive element 26.