Abstract: A flexible anchor buoy includes a tube for the passage therethrough of an anchor chain, a core pipe fixed perpendicularly to the tube, and a pair of resilient buoyant bodies disposed around the core pipe one on each side of the tube and separated from the tube. The resilient buoyant bodies are enclosed by a pair of flexible coverings, respectively. When the anchor buoy is held against a ship and locally compressed under the weight of an anchor, the buoyant bodies flex relatively freely without being stressed by the tube.

Abstract: An elastomer obtained by reacting at a specific ratio an isocyanate-terminated prepolymer formed by reacting at a specific ratio of polymer containing a diene polymer having a terminal hydroxyl group with a diisocyanate compound, with a curing agent having a terminal hydroxyl or amine group, is especially excellent as a tire filling material. A tire prepared by filling this elastomer is valuable as an elastic tire of a public vehicle.

Abstract: A pneumatic tire having a carcass ply of metal cords arranged and embedded in the radial direction in a rubber is disclosed. This carcass ply has a natural sectional profile, and the position of the carcass ply in the shoulder portion of the tire satisfies the requirement of 0.3.ltoreq.t.sub.2 /t.sub.1 .ltoreq.1.0 in which t.sub.2 designates the thickness of the tire inside the carcass ply and t.sub.1 designates the thickness of the tire outside the carcass ply. In this shoulder portion, the thickness of an inner liner layer inside the carcass cord is gradually reduced toward the center of the tire top and the maximum width position of the tire. This pneumatic tire is preferably used for a high-load vehicle.

Abstract: Disclosed is a pressure-sensitive, electrically conductive elastomeric composition comprising a substrate composed of an organic flexible material and electrically conductive particles consisting of angle-chipped, roundish pebble-like particles of artificial graphite incorporated and dispersed therein. An elastomeric material comprising this composition has such a characteristic property that the electric resistivity is conspicuously and gradiently reduced under application of a pressure from the level maintained when no pressure is applied. This characteristic property is very durable and therefore, the material can be used advantageously for switch elements and the like.

Abstract: A pneumatic run flat tire for motorcycles having a high handling stability during straight and zigzag runnings, cornering stability and durability, even when the tire is punctured while running and the pneumatic pressure inside of the tire becomes equal to atmospheric pressure. The run flat tire has a pair of sidewall-reinforcing layers, each comprising an elastic filler extending from an end location adjacent a bead core in a bead portion to the other end location in a tread portion through a sidewall portion of the tire, the elastic filler being reinforced with at least two reinforcing plies, one of which extends along one side surface of the elastic filler toward the tread portion, and then, additionally extends into the tread portion, and the other one of which extends along the other side surface of the elastic filler toward the bead portion, and the, additionally extends into the tread portion.

Abstract: Disclosed is a run flat tire for motorcycles having a high handling stability, cornering stability and durability even when the tire is punctured during running and the pneumatic pressure inside of the tire becomes equal to atmospheric pressure. The run flat tire has a pair of sidewall-reinforcing layers each comprising (1) an elastic filler extending from an end location adjacent a bead core in a bead portion to the other end location in a tread portion through a sidewall portion of the tire and (2) at least one reinforcing ply which extends along one side surface of the elastic filler toward the tread portion, is turned up around the end of the elastic filler in the tread portion and which then further extends along the other side surface of the elastic filler toward the bead portion.

Abstract: Disclosed are a puncture sealant composition in emulsion for a tubeless pneumatic tire comprising a butyl rubber emulsion, a saturated hydrocarbon polymer emulsion, a crosslinking agent for the rubber and a crosslinking activator. A composition further containing a diene type unsaturated polymer emulsion and/or a natural rubber latex is also disclosed. These compositions are suitable for use in the production of a self-sealing vehicle tire.

Abstract: A tensile testing system for use with a specimen of rubber or other material having a test region defined on its reduced midportion by a marking or markings of, for example, higher lightness than the other specimen surface. The system comprises a scanning device for repeatedly translating the optical characteristics of the specimen or specimens into an electrical signal as the specimen or specimens are subjected to increasing tensile stress, and a gate circuit for deriving from the output signal of the scanning device its portions corresponding to the test region or regions. The varying length of the test region or regions can be represented either by pulse durations or by pulse numbers. The scanning device can be either an "area scanner" such as a television camera or a "line scanner" such as a solid-state line image sensor. Various embodiments are disclosed.

Abstract: A porous inorganic product which is excellent in acoustic absorptivity and filtration efficiency and is high in strength is produced by bringing suitably sized organic foam particles, which have elasticity and can be shrunk greatly by heating or can be dissolved in a solvent, into contact with one another under pressure so as to deform each thereof, filling the gaps present between the organic foam particles with an inorganic binder such as cement, hardening the inorganic binder to form a hardened material, and shrinking the organic foam particles contained in the hardened material.

Abstract: A radial ply pneumatic tire, having a high durability, comprising an improved bead portion thereof which comprises a bead wire bundle, a carcass ply of a metal tire cord fabric and a reinforcing ply, all embedded in a rubber matrix, the reinforcing ply having a portion thereof located in the outside surface layer in the bead portion and comprising a woven multifilament fabric consisting of multifilament warps in a density of 20 to 65 yarns/50 mm and multifilament wefts in a density of 20 to 65 yarns/50 mm and an endmost point of the portion of the reinforcing ply in the outside surface layer of the bead portion is located farther from the bead wire bundle than the endmost point of the carcass ply.

Abstract: For joining pieces of rubberized tire cords or like sheet material end to end, a pair of coplanar tables are provided which have edges disposed opposite to each other in exact parallelism. Each table is equipped with a retractable stop for positioning a piece of sheet material thereon with its end projecting a predetermined distance beyond the said table edge, and a clamp for temporarily securing the sheet material in position on the table. As one of the tables is then moved toward the other, the pieces of sheet material have their opposed ends preliminarily joined together. The apparatus further comprises at least one finishing roller supported above the tables for rolling the preliminarily formed joint of the sheet material, which roller is in the form of a coil of wire effective both to smooth and to strengthen the joint.

Abstract: A rubber composition which comprises more than 0.5 wt parts of a cobalt salt of organic acid, more than 0.5 wt part of monohydroxybenzoic acid component and 100 wt parts of a rubber.

Abstract: Rubber compositions containing relatively large amounts of benzoic acid or monohydroxy benzoic acid providing vulcanized rubber products having improved adhesion to metallic or fibrous materials and an improved chipping and cutting resistance. This is a continuation of application Ser. No. 588,047, filed June 18, 1975, now abandoned.

Abstract: Process and apparatus for fabricating a pneumatic rubber fender comprising a cylindrical body of a combination of a plurality of rubber and reinforced rubber layers, both of the terminal ends of which are closed so that compressed air can be sealed therein. In the fabrication process, the cylindrical body of a non-vulcanized rubber fender, one end of which is closed by a first end plate, is firstly formed on a fabrication drum provided with a cylindrical portion and an end plate portion closing one end of the cylindrical portion. The connection of a second end plate with an opened free end of the above-mentioned cylindrical body of the non-vulcanized rubber fender is carried out in such a condition that the above-mentioned opened free end is turned back while the cylindrical body of the non-vulcanized rubber fender is mounted on the fabrication drum.

Abstract: A granular matter feeding method and an apparatus, in which unvulcanized rubber blocks of a non-fixed shape are crushed by a crusher into granules, the weight of said granules being measured, batches of said granules being fed onto a plurality of storages conveyors according to kind, said conveyors feeding in turn to a plurality of metering hoppers which selectively deliver measured amounts of the granules to a conveyor for transporting to a kneader. This system permits the mixing of precise amounts of various types or sizes of rubber granules.

Abstract: Rubber compositions containing therein as a source of carbon disulfide a compound selected from the group consisting of cyclic bis (dithiocarbamic acid) metal salts and cyclic or non-cyclic dithiocarbamic-xanthogenic acid metal salts and an amine-isocyanate addition compound as a vulcanization accelerator system having excellent scorching stability with rapid vulcanization at usual vulcanization temperatures.

Abstract: Rubber compositions containing therein as a source of carbon disulfide at least one compound selected from the group consisting of cyclic bis (thiocarbamoyl) mono- or di-sulfides, cyclic bis (thioxanthogenyl) mono- or di-sulfides, and cyclic (thiocarbamoyl-thioxanthogenyl) mono- or di-sulfides and an amine-isocyanate addition compound as a vulcanization accelerator system having excellent scorching stability with rapid vulcanization at usual vulcanization temperatures.

Abstract: Rubber compositions containing an alkylene-bisdithiocarbamate and an amine-isocyanate addition compound as a vulcanization accelerator having excellent scorching stability with rapid vulcanization at usual vulcanization temperatures.

Abstract: A current-collecting elastic tire for a vehicle in which a plurality of electrodes of conductive material are continuously or discontinuously embedded in the tire body in the circumferential direction of the tire tread portion, and these electrodes are exposed at one end thereof from the tire tread surface and connected electrically at the other end thereof to the vehicle by electrical wiring so that external electric current can be collected by the tire.

Abstract: A waterproof sheet for a cargo chamber of an aircraft comprising a base sheet adapted to lie on the floor of the cargo chamber and having notched portions at positions corresponding to the doors of the cargo chamber; door sill flaps provided to the base sheet around the notched portions and adapted to be folded up and down at the time of opening and closing of the cargo chamber door; door sill protectors provided to the base sheet at the notched portions for protecting the door sill flaps; side sheets provided at the longitudinal sides of the base sheet and having tape fasteners for securing the side sheets to the wall of the cargo chamber, and end sheets provided at both longitudinal ends of the base sheet and the side sheets, the end sheets having tape fasteners for tucking them when the base and side sheets are properly positioned in the cargo chamber.