Abstract: A resin composition that has excellent flux activity, flexibility and storage stability and that is suitable for a pre-applied underfill material is provided. The resin composition contains a compound (A) having a phenolic hydroxy group, a metal ion trapping agent (B) and a radical polymerizable compound (C).

Abstract: A resin composition that has both excellent flux activity and high insulation reliability, that possesses good storage stability, and that further has flexibility with good operability upon being used as a laminate is provided. The resin composition contains a chelating flux agent (A), a thermal radical polymerization initiator (B) and a radical polymerizable compound (C).

Abstract: Disclosed are: an apparatus for kneading a rubber material which continuously performs a series of processes which are kneading a rubber material with a non-vulcanization compounding agent at the beginning, kneading it with a vulcanization compounding agent, and finally obtaining final kneaded rubber; and a kneading method using this kneading apparatus. Preparatory kneaded rubber having been kneaded in one internal mixer is selectively fed, by a distribution conveyor, to a group of kneading lines where at least two kneading lines are provided to be arranged side by side. Each of the kneading line consists of a plurality of open roll mixers serially connected with each other. Intermediate kneaded rubber resulted in having a target viscosity after having been kneaded in the group of kneading lines is kneaded with a vulcanization compounding agent, whereby final kneaded rubber is obtained.

Abstract: Rubber compositions for tire treads of an all-weather type are disclosed which are so designed as to exhibit high dynamic Young's modulus, sufficient resistance to snow and ice skidding, to abrasion, to cracking and to crack growth and adequate durability. A selected base rubber is combined with a selected carbon black and a selected m-cresol resin. The base rubber is a blend of two different rubbers, one being natural rubber alone or a combination with a diene rubber and the other being butadiene rubber. The carbon black has specified absorptivity of iodine and dibutyl phthalate. The m-cresol resin is a novolak condensate.

Abstract: A pneumatic radial tire having such a radial cross-section that the profile of the outer surface of the tire side is composed of a plurality of straight lines and each intersection at which the straight lines meet with each other is formed so as to protrude in the outward direction of the cross-section of the tire.

Abstract: Tread rubber compositions or use in automobile tires are disclosed which essentially comprise matrix rubbers and specified amounts of a selected class of low-hardness vulcanized rubbers having specified particle sizes. The matrix and vulcanized rubbers include carbon black, respectively, in amounts defined by the equation 0<X.ltoreq.Y/3 where X is the amount of carbon black present in the vulcanized rubber, and Y is the amount of carbon black in the matrix rubber, each such amount being based on the total weight of the matrix rubber. The resulting tire is rendered highly resistant to snowy and icy conditions and also to abrasive wear.

Abstract: A heavy load radial tire is disclosed, wherein a sub-carcass layer having a cord angle substantially equal to that of a carcass layer is disposed on the carcass layer, and at least one belt layer whose cords cross at right angles the cords of the sub-carcass layer is disposed on the sub-carcass layer.

Abstract: A rubber composition comprising, in specific mixing ratios, rubber material consisting mainly of natural rubber and/or synthetic polyisoprene rubber, a cobalt salt of rosin, carbon black having specific iodine adsorbability and dibutyl phthalate absorbability, and sulphur.

Abstract: An engine preheating apparatus in which an actuation circuit for a glow plug mounted in the engine is provided with a starting resistor of barium titanate of which the resistance value abruptly increases at a specific temperature, and a normal-operation resistor connected in parallel to the starting resistor. When the starting resistor is low in temperature and hence has a small resistance value, a large current is supplied to the glow plug, whereas when the starting resistor is high in temperature and therefore has a high resistance, a comparatively small current is supplied to the glow plug through the normal-operation resistor. The starting resistor is comprised of plural resistor elements of barium titanate as a main component and plural electrode plates alternately pressed one on each other. Each of the electrode plates is in pressure contact with each of heat radiators, so that the heat generated by the resistor elements is radiated from the radiators through the electrode plates.

Abstract: A parallel circuit of an ordinary resistor exhibiting an ordinary resistance characteristic and a starting resistor abruptly increasing its resistance at a certain temperature is inserted between glow plugs in a Diesel engine and a battery. The resistance of the starting resistor is smaller than that of the ordinary resistor at a normal temperature. The resistance of the starting resistor becomes larger than that of the ordinary resistor when a large amount of current flows through the starting resistor. Therefore, current flows from the battery to the glow plugs mainly through the starting resistor at first, and then it flows mainly through the ordinary resistor. The ordinary resistor is disposed in an intake air passage of the engine.

Abstract: In a device for purifying the exhaust gases discharged from an internal combustion engine of the type having a secondary air supply pipe for charging the secondary air from an air source such as an air pump into an exhaust pipe upstream of an exhaust gas reactor or the like, a three-way valve is inserted in the supply pipe in such a manner that the three-way valve may be displaced between a first position at which the air source and the exhaust pipe are communicated with each other and a second position at which the communication between them is interrupted and the secondary air is relieved or returned to the air source bypassing the exhaust pipe; an air-fuel ratio sensor is inserted into the exhaust pipe downstream of the opening of the secondary air supply pipe into the exhaust pipe; and means for controlling the three-way valve is provided so that when the air-fuel ratio detected by the sensor is lower than a reference or optimum ratio at which the best performance of the reactor is expected the three-way

Abstract: A secondary air supply pipe line is opened in the exhaust pipe of an internal combustion engine on the upstream side of an exhaust gas reactor which is mounted in the exhaust pipe, and an air-fuel ratio sensor for detecting the air-fuel ratio of exhaust gases is mounted in the exhaust pipe on the downstream side of the portion where the secondary air supply pipe line is open. An air flow control valve for on-off controlling the flow of air in the secondary air supply pipe line is operated in accordance with the output signal of the air-fuel ratio sensor.

Abstract: An engine exhaust gas purification system having an exhaust gas reactor mounted on the engine exhaust pipe, a secondary air supply system having a secondary air supply passage connected to the exhaust pipe upstream of the reactor, and an exhaust gas air-fuel ratio detector mounted on the exhaust pipe to detect air-fuel ratio of exhaust gases in the exhaust pipe. A secondary air supply control valve is provided in the secondary air supply passage and controlled by a valve actuator having a diaphragm to which positive pressure of the secondary air and the engine intake vacuum pressure can be applied. The application of the positive and vacuum pressures to the diaphragm is controlled by solenoid valves which are controlled in accordance with the air-fuel detector output voltage which represents the detected exhaust gas air-fuel ratio, whereby the secondary air supply control valve is controlled such that the secondary air is supplied to the engine exhaust gases at a continuously controlled, variable rate.

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: A system for heating the intake pipe of an internal combustion engine including a combustion equipment disposed adjacent to the intake pipe, a fuel supply system for supplying the fuel into the combustion equipment and an air supply system including an air pump for charging the air into the combustion equipment, the intake pipe being heated by the heat generated by the combustion of the air-fuel mixture in the combustion equipment. The fuel supply system includes a main fuel injection nozzle and an auxiliary fuel injection nozzle which is controlled by control means so as to start or stop the fuel injection depending upon the operating conditions of the engine. When the engine is started, both the main and auxiliary fuel injection nozzles inject fuel so as to attain the rapid heating of the intake pipe, but when the temperature of the intake pipe exceeds a predetermined level, the injection by the auxiliary fuel injection nozzle is stopped.