Abstract: A disk-shape resin molded article such as a gear comprises a rim, a boss, a web having a disk configuration for connecting the rim and the boss, and gear teeth formed on the rim. The molded article is produced by an injection-compression molding process which comprises injecting a molten resin into a cavity of a metal mold, and pressing a web site and at least one site selected from the group consisting of a boss site and a rim site in a thickness direction. The cavity may have a capacity larger than the solidified products by contraction amount of the injected molten resin.

Abstract: A fuel cell separator unit having a crosslinked rubber layer is fabricated by coating a rubber-containing coating agent on the periphery of the surface of a separator to form a thin, unvulacanized rubber layer, and then vulcanizing or crosslinking the thin rubber layer. A tightly sealed fuel cell is constituted by providing both sides of the main body of the fuel cell with separator units fabricated in the manner described above. When a fuel cell separator fabricated through a crosslinking by radioactive ray irradiation, the performance of the fuel cell is not hindered by the ingredient(s) of a rubber packing. The present invention provides a fuel cell sealing structure which ensures a perfect sealing. According to the present invention, a step of attaching a thin rubber packing is no longer necessary.

Abstract: A fuel cell separator unit having a crosslinked rubber layer is fabricated by coating a rubber-containing coating agent on the periphery of the surface of a separator to form a thin, unvulacanized rubber layer, and then vulcanizing or crosslinking the thin rubber layer. A tightly sealed fuel cell is constituted by providing both sides of the main body of the fuel cell with separator units fabricated in the manner described above. When a fuel cell separator fabricated through a crosslinking by radioactive ray irradiation, the performance of the fuel cell is not hindered by the ingredient(s) of a rubber packing. The present invention provides a fuel cell sealing structure which ensures a perfect sealing. According to the present invention, a step of attaching a thin rubber packing is no longer necessary.

Abstract: A filter element comprises an oil-impregnated filtering member, and a transmission preventing layer formed on a downstream side of the filtering member, for restricting transmission of at least the carbon dusts from the oil-impregnated filtering member. The filtering member may be formed like a ridge-like-folded structure. The transmission preventing layer may be formed of a coating layer having a resistance against a viscous oil that is impregnated in the filtering member. This coating layer may be formed uniformly as a whole or the thickness or the content of the coating layer may be increased partially. A ventilation shutting-off member (filling layer) may be formed as the transmission preventing layer in the root portion areas of the ridge portions. The transmission preventing layer may comprise a resistant component that is insoluble in the oil that is impregnated in the filtering member.

Abstract: A filter element is made of a first filtering member, and a second filtering member that is arranged on a downstream side of the first filtering member and is impregnated with an oil. The first filtering member consists of a downstream wet layer that is impregnated with the oil, which is transferred by contact to the second filtering member, and an upstream dry layer that is not impregnated with the oil. A density of the first filtering member may be set smaller than that of the second filtering member.

Abstract: A cable protecting tube having high transparency and allowing the filling condition of mortar therein to be visually observed from the outside as well as exhibiting high pressure resistance is provided. A cable protecting tube for accommodating a cable and for filling with mortar includes a protecting tube (1) having smooth inner and outer surfaces formed from an ionomer resin excellent in transparency, and a spiral or mesh-shaped reinforcing member (2) for reinforcing the protecting tube. The reinforcing member (2) may be buried in the protecting tube (1). The protecting tube (1) is not limited to the smooth-walled tube but may be a spirally corrugated tube.

Abstract: An air intake noise reduction apparatus is provided which can effectively reduce air intake noise even with simple construction requiring a small number of components. Four air intake passages 24, 25, 26, 27 which each have different passage lengths are formed by connecting an upper wall 17 and a lower wall 18 of an air intake noise reduction duct 11 which are flattened in a vertical direction with three partition walls 21, 22, 23. Air intake noise can be reduced by making pulsating air interfere with one another which is generated in the plurality of air intake passages 24, 25, 26, 27 which each have the different passage lengths in such a manner as to have different phases shifted from one another. In addition, since the partition walls function as a reinforcement rib, the rigidity of the air intake noise reduction duct 11 can be enhanced.

Abstract: A disk-shape resin molded article such as a gear comprises a rim, a boss, a web having a disk configuration for connecting the rim and the boss, and gear teeth formed on the rim. The molded article is produced by an injection-compression molding process which comprises injecting a molten resin into a cavity of a metal mold, and pressing a web site and at least one site selected from the group consisting of a boss site and a rim site in a thickness direction. The cavity may have a capacity larger than the solidified products by contraction amount of the injected molten resin.

Abstract: The blow-molded articles having an open end is produced by the steps of; setting a resin parison in cavity formed by a pair of metal mold members, blowing a pressurized gas into the resin parison to form an intermediate molded article, and cutting a predetermined part of the intermediate molded article with forward or backward movement of a cutting means. The cutting means is attached to the one member of the metal mold members and movable reciprocally in a cross direction relative to the longitudinal or axial direction of the metal mold members. The cutting means may be guided movably along a groove or slit formed in the metal mold members.

Abstract: A flexible hose which has a hose body made of soft synthetic resin, a reinforcement made of hard synthetic resin wound spirally and joined to the hose body by fusion, and a conductor arranged inside the reinforcement in its longitudinal direction. The conductor does not adhere to the reinforcement and is movable. The hose body is formed by: extruding a tube made of soft resin from a head of an extruder; pressing and flattening the tube to form a strip; and winding the strip spirally with the adjacent side edges joined together.

Abstract: A blow molding method for forming a hollow resin product comprises a parison extruding step, a protrusion abutting step and a confronting rod abutting step. In the extruding step, a parison is extruded from a die head towards a position interposed between a pair of molding portions. Each molding portion has a mating surface and a parison-cutting-protrusion erected from the mating surface. In the protrusion abutting step, the protrusions are abutted from each other. In the confronting rod abutting step, the spherical surfaces formed at tip ends of the rods protruded from the mating surfaces of the molding portions are abutted from each other. These steps are simultaneously executed, to thereby remove a flash from a product when the molding portions are closed. In addition to this, the rods mounted on one of molding portions are mounted on the same so as to be adjustable in its protruding length from the mating surface.

Abstract: The blow-molded hose of a synthetic resin of the present invention is produced by blow-molding a single parison comprising a soft resin and a hard resin. The blow-molded hose comprises a monolayer (or single-layer) segment formed with either a soft resin layer or a hard resin layer and multilayer laminating) segment formed with the soft resin layer and the hard resin layer, wherein, in the multilayer (laminating) segment, the thickness of the resin layer forming the monolayer segment is thinner than that of the other resin layer. Practically, the monolayer segment comprises the soft resin layer and forms the connection end(s) at the end(s) of the hose.

Abstract: A snow melting apparatus 1 according to the present invention comprises a plurality of heating wires 10, a pair of fixing members 20, 20 and rod-shaped auxiliary fixing members 30. The plurality of heating wires 10 are arranged substantially in parallel with each other at predetermined intervals in a direction perpendicular to its axial direction. The fixing members fix and hold the plurality heating wires at end portions thereof. The rod-shaped auxiliary fixing member holds the plurality of heating wires at intermediate positions thereof. Accordingly, it is possible to provide a snow melting apparatus which holds a certain flexing capability, which causes no damage to the joining force between a base layer and a surface layer of a driveway, and which does not fail completely even if the apparatus partially breaks at a single position therealong.

Abstract: A snow melting apparatus 1 according to the present invention comprises a plurality of heating wires 10, a pair of fixing members 20, 20 and rod-shaped auxiliary fixing members 30. The plurality of heating wires 10 are arranged substantially in parallel with each other at predetermined intervals in a director perpendicular to its axial direction. The fixing members fix and hold the plurality heating wires at end portions thereof. The rod-shaped auxiliary fixing member holds the plurality of heating wires at intermediate positions thereof. Accordingly, it is possible to provide a snow melting apparatus which holds a certain flexing capability, which causes no damage to the joining force between a base layer and a surface layer of a driveway, and which does not fail completely even if the apparatus partially breaks at a single position therealong.

Abstract: A fuel cell separator unit having a crosslinked rubber layer is fabricated by coating a rubber-containing coating agent on the periphery of the surface of a separator to form a thin, unvulacanized rubber layer, and then vulcanizing or crosslinking the thin rubber layer. A tightly sealed fuel cell is constituted by providing both sides of the main body of the fuel cell with separator units fabricated in the manner described above. When a fuel cell separator fabricated through a crosslinking by radioactive ray irradiation, the performance of the fuel cell is not hindered by the ingredient(s) of a rubber packing. The present invention provides a fuel cell sealing structure which ensures a perfect sealing. According to the present invention, a step of attaching a thin rubber packing is no longer necessary.

Abstract: A semi-conductive silicone rubber composition contains carbon black. The carbon black contains thermal black obtained by thermally cracking a natural gas and having a specific surface area—nitrogen absorption method of 8.0 to 10.0 m2/g, a dibutyl phthalate absorption number (dibutyl phthalate absorption number) of 30 to 40 cm3/100 g and an averaged particle size of 200 to 330 nm.

Abstract: A blow molding method for forming a hollow resin product comprises a parison extruding step, a protrusion abutting step and a confronting rod abutting step. In the extruding step, a parison is extruded from a die head towards a position interposed between a pair of molding portions. Each molding portion has a mating surface and a parison-cutting-protrusion erected from the mating surface. In the protrusion abutting step, the protrusions are abutted from each other. In the confronting rod abutting step, the spherical surfaces formed at tip ends of the rods protruded from the mating surfaces of the molding portions are abutted from each other. These steps are simultaneously executed, to thereby remove a flash from a product when the molding portions are closed. In addition to this, the rods mounted on one of molding portions are mounted on the same so as to be adjustable in its protruding length from the mating surface.

Abstract: The suction apparatus comprises an apparatus main body which is divided into lower and upper box bodies 11 and 15. In the apparatus main body, there are stored a first duct for sucking in air from the open air, a resonator connected to the first duct, a cleaner for cleaning the sucked-in air, and a second duct 30 for sending out the air, after it has passed through the cleaner, into the internal combustion engine. A plurality of ribs 19a, which are situated in the suction openings 30a of the second duct 30 and are used to reinforce the upper box body 15, are respectively inclined at an angle conformed to the installation angle &thgr; of the second duct 30, whereby the ribs 19a can contribute toward guiding the flow of the air.

Abstract: The suction apparatus comprises an apparatus main body which is divided into lower and upper box bodies 11 and 15. In the apparatus main body, there are stored a first duct for sucking in air from the open air, a resonator connected to the first duct, a cleaner for cleaning the sucked-in air, and a second duct 30 for sending out the air, after it has passed through the cleaner, into the internal combustion engine. A plurality of ribs 19a, which are situated in the suction openings 30a of the second duct 30 and are used to reinforce the upper box body 15, are respectively inclined at an angle conformed to the installation angle &thgr; of the second duct 30, whereby the ribs 19a can contribute toward guiding the flow of the air.

Abstract: The abrasion resistant hose of the present invention comprises an inner layer mainly formed with a thermoplastic polyurethane resin, an outer protective layer comprising a soft vinyl chloride resin united with the inner layer by thermal-fusion, and a spiral reinforcement comprising a hard synthetic resin buried in or attached to the outer protective layer. The inner layer is formed with a thermoplastic polyurethane resin containing substantially no migratory plasticizer or an internally-plasticized thermoplastic polyurethane resin (i.e., a thermoplastic polyurethane resin which is not externally-plasticized with a migratory plasticizer). The outer protective layer is formed with a soft vinyl chloride resin containing substantially no migratory plasticizer, united with the inner layer by fusion. An intermediate layer comprising a soft vinyl chloride resin containing no migratory plasticizer may be interposed between the inner layer and the outer protective layer.