Abstract: There is provided a power transmission belt which comprises a compression layer and an adhesive rubber layer which are adhered to each other by vulcanizing together and which has aramid fiber cords embedded in the adhesive rubber layer, wherein the compression layer and the adhesive rubber layer are formed of vulcanizate of an ethylene-&agr;-olefin-diene rubber compound and wherein the aramid fiber cords having a first twisting coefficient and a final twisting coefficient both in the range from 650 to 950 are adhesion treated with a resorcin-formalin-latex adhesive composition wherein the latex comprises at least one of chlorosulfonated polyethylene and alkylated chlorosulfonated polyethylene in an amount of 50-100% by weight based on the solid components of the resorcin-formalin-latex and adhered to and embedded in the adhesive rubber layer. A process for the production of such power transmission belt is also provided.

Abstract: A power transmission belt is formed so that the back face side of a belt body is covered with a reinforced fabric woven with warps and wefts. In the reinforced fabric, the direction of warps and the direction of wefts make equal angles with the belt widthwise direction, and each of two directions of consecutive yarn intersections of the warps and wefts formed to stand out from the belt surface makes a certain angle with the belt widthwise direction.

Abstract: Short aramid fibers extruded from a side face of each rib in a V-ribbed belt are formed in curled shape. The root portions of the extruded short aramid fibers are raised from the side face of the rib. The tip portion of each extruded short aramid fiber is bowed in a direction different from a bowing direction of its medial portion. The extruded sections of the short aramid fibers are different in bowing direction from one another to decentralize the orientation thereof.

Abstract: In a heavy duty power transmission V-belt B formed by engaging tension members 1 and 1 with a plurality of blocks 10, 10, . . . , to prevent as much as possible each block 10 from producing failure at the high-speed running of the belt, a fitting part 12 of each block 10 has an indent 22 formed by upwardly recessing a portion of a resin part 17 located between an upper ridge 14 and an innermost abutment surface 20 of the fitting part 12. Thereby, no edge exists between the innermost abutment surface 20 and the upper ridge 14 so that stress can be distributed. This prevents the occurrence of a crack in the resin part 17 due to stress concentration on the edge, the occurrence of a crack in a reinforcement 18 of each block 10 beginning at the leading end of the crack in the resin part 17, and in turn the fracture of an upper beam 18a of the reinforcement 18, thereby providing enhanced resistance against failure of the block 10.

Abstract: Extruded sections of synthetic fibers extruded from a side face of each rib in a V-ribbed belt are plastically deformed in the shape of sectors gradually broadened toward their distal ends. The extruded sections of the synthetic fibers are not heated beyond their melting point during a grinding process so as to be kept unmelted. The extruded sections of the synthetic fibers are raised from the side face of the rib so that microscopic unevenness is formed over the side face of the rib. The synthetic fiber is formed of nylon with a filament diameter of 20 &mgr;m or more.

Abstract: A frictional transmission belt looped over V-ribbed pulleys for torque transmission. The V-ribbed pulleys are coated with anticorrosive paint prior to shipment of an automobile. A surface-active layer 7 made of a surfactant is formed on surfaces of ribs 1a on a belt body 1. With the existence of the surface-active layer, generation of an abnormal sound due to stick slip is suppressed even when the anticorrosion paint has not come off, without impairing the belt transmission capability.

Abstract: There is provided a power transmission belt which comprises a compression layer and an adhesive rubber layer which are adhered to each other by vulcanizing together and which has polyester fiber cords embedded in the adhesive rubber layer, wherein the compression layer and the adhesive rubber layer are formed of vulcanizate of an ethylene-&agr;-olefin-diene rubber compound and wherein the polyester fiber cords are adhesion treated with a resorcin-formalin-rubber latex adhesive composition wherein the rubber latex comprises at least one of chlorosulfonated polyethylene and alkylated chlorosulfonated polyethylene in an amount of 50-100% by weight based on the solid components of the rubber latex and adhered to and embedded in the adhesive rubber layer. A process for the production of such power transmission belt is also provided.

Abstract: A chain guide member used in a chain transmission apparatus, and manufacturing method and apparatus thereof. The chain guide member has a sliding contact section extending along a traveling surface of a chain and coming into sliding contact with the chain, and a reinforcement main body reinforcing and supporting the sliding contact section along the traveling surface of the chain. A part or all of a joint portion between the sliding contact section and the reinforcement main body is joined by melting.

Abstract: The invention provides a sheet coated with a powdery coating composition comprising a substrate and a porous and continuous resin layer provided on the substrate, the resin layer comprising particles of the powdery coating composition having an average particle diameter of 0.1 to 30 &mgr;m and inorganic fine particles having an average particle diameter of 1 nm to 1 &mgr;m and dispersed between the particles of powdery coating composition to form space at least in part therebetween. The sheet is suitably used as an image-receiving sheet for an ink-jet recording. The sheet can be obtained according to the invention by mixing a powdery coating composition having an average particle diameter of 0.

Abstract: A belt-type one-way clutch is arranged so that a case is assembled with a flat pulley so as to rotate around the central axis of the flat pulley, and that a flat belt is looped between a working surface of a rocking member supported for rocking motion by a shaft member held at both ends in shaft bores of the case and a working surface of the flat pulley, and that the rocking plate biased from a leaf spring presses one span of the flat belt to place an initial tension on the flat belt. Both the ends of the shaft member are held in the shaft bores of the case via respective bushes to suppress stress. Accordingly, larger torque can be transmitted despite use of aluminum alloy as material of the case.

Abstract: In a belt continuously variable transmission constructed such that a block-type belt in which a plurality of blocks are fixedly engaged with a pair of tension members is wound between driving and driven pulleys of variable diameter each having a V-section pulley groove with a predetermined wedge angle &agr;, even if oil mist adheres to the surfaces of the pulley grooves and contact surfaces of the blocks, its transmission power is prevented from being reduced. This can be attained by setting the wedge angle &agr; at a value equal to or less than 20°. By increasing the apparent friction coefficient &mgr;′ between each pulley and each block of the belt, the transmission can retain a high transmission power, and concurrently the friction coefficient &mgr; between each pulley and each block can be reduced to the level to which the friction coefficient &mgr; is decreased due to oil-mist adhesion.

Abstract: There is provided a power transmission belt which comprises a compression layer and an adhesive rubber layer which are adhered to each other by vulcanizing together and which has aramid fiber cords embedded in the adhesive rubber layer, wherein the compression layer and the adhesive rubber layer are formed of vulcanizate of an ethylene-&agr;-olefin-diene rubber compound and wherein the aramid fiber cords having a first twisting coefficient and a final twisting coefficient both in the range from 650 to 950 are adhesion treated with a resorcin-formalin-latex adhesive composition wherein the latex comprises at least one of chlorosulfonated polyethylene and alkylated chlorosulfonated polyethylene in an amount of 50-100% by weight based on the solid components of the resorcin-formalin-latex and adhered to and embedded in the adhesive rubber layer. A process for the production of such power transmission belt is also provided.

Abstract: The belt body of a power transmission belt is composed of a rubber composition comprising ethylene-á-olefin elastomer as the raw material rubber. The ethylene-á-olefin elastomer as the raw material rubber comprises 7 to 12 mass % of a high molecular weight component having a molecular weight of 106 or more and an ethylene content of 65 mass % or more, and 26 to 60 mass % of a low molecular weight component having a molecular weight of 105 or less and an ethylene content of 60 mass % or less, and the ethylene-é-olefin elastomer has a Mooney viscosity of 50 ML1+4 or less (100 C.).

Abstract: A belt fabric which is provided at a part of a power transmission belt on which frictional forces act is formed by dipping into a rubber solution prepared by dissolving a non cross-linked hydrogenated nitrile rubber composition, mixed with a polyethylene powder having a molecular weight in excess of 1 million and an organic peroxide as a cross-linking agent, in a solvent.

Abstract: Short aramid fibers extruded from a side face of each rib in a V-ribbed belt are formed in curled shape. The root portions of the extruded short aramid fibers are raised from the side face of the rib. The tip portion of each extruded short aramid fiber is bowed in a direction different from a bowing direction of its medial portion. The extruded sections of the short aramid fibers are different in bowing direction from one another to decentralize the orientation thereof.

Abstract: Both types of short aramid fibers and non-aramid synthetic fibers are extruded from a side face of each rib in a V-ribbed belt. The extruded section of the short aramid fiber is formed in curled shape. The extruded section of the synthetic fiber is formed in a sector gradually broadened toward its distal end with its non-melting condition maintained. The root portions of the extruded sections of both types of short fibers are raised from the side face of the rib. The extruded sections of the short aramid fibers are extruded in multiple directions, whereas the extruded sections of the synthetic fibers are extruded in a given direction. The extruded section of the short aramid fiber is formed longer than the extruded section of the synthetic fibers.

Abstract: In a belt-driven auxiliary equipment driving apparatus for vehicle engines, a one-way clutch-integrated pulley is disposed which includes a bearing for relatively rotatably supporting inner and outer rings and a clutch mechanism for effecting or blocking torque transmission between the inner and outer rings by changing the tilting direction of sprags according to the direction of relative rotation of the inner and outer rings. In such a case, a cage of the clutch mechanism is connected to a cage of the bearing. The cage of the bearing is rotated in the same direction as that of relative rotation of the outer ring at a relative rotational speed lower than that of the outer ring, and as a result, the relative speed of bodily movement of each sprag around the inner ring is made slower than the relative rotational speed of the outer ring. During idling of the inner and outer rings, each sprag thereby slides also on the outer ring and the speed of slide of each sprag on the inner ring is lowered.

Abstract: A one-way clutch is arranged so that a plurality of intermediate members, which are each retained in a cage, each wedge between inner and outer rings when the inner and outer rings relatively rotate in a locking direction and each rock opposite to the direction of the wedging when the inner and outer rings relatively rotate in an idling direction, are pressed in the direction of the wedging by spring members. In this one-way clutch, each spring member includes a pair of coil springs that are juxtaposed to align in an axial direction of the inner and outer rings, are retained at one ends thereof by the cage and resiliently contact at the other ends thereof with the intermediate member. The one ends of both the coil springs are connected together through a connecting portion. The coil springs and the connecting portion are formed of a single wire.

Abstract: Extruded sections of synthetic fibers extruded from a side face of each rib in a V-ribbed belt are plastically deformed in the shape of sectors gradually broadened toward their distal ends. The extruded sections of the synthetic fibers are not heated beyond their melting point during a grinding process so as to be kept unmelted. The extruded sections of the synthetic fibers are raised from the side face of the rib so that microscopic unevenness is formed over the side face of the rib. The synthetic fiber is formed of nylon with a filament diameter of 20 &mgr;m or more.

Abstract: Short aramid fibers extruded from a side face of each rib in a V-ribbed belt are formed in curled shape. The root portions of the extruded short aramid fibers are raised from the side face of the rib. The tip portion of each extruded short aramid fiber is bowed in a direction different from a bowing direction of its medial portion. The extruded sections of the short aramid fibers are different in bowing direction from one another to decentralize the orientation thereof.