Abstract: A curing bladder containing (A) organic rubber which is surface treated with a curable silicon composition containing (B) polyorganosiloxane, which comprises at least two monovalent substituted or unsubstituted hydrocarbon groups having five or more carbon atoms and a C.dbd.C double bond connected to the silicon atom through at least one carbon atom, and having a degree of polymerization greater than 20.

Abstract: Disclosed herein is an apparatus for sticking a rubber sheet material to a building drum which comprises a presser to secure the forward end of the rubber sheet material, said presser being provided at both ends thereof with attracting means and being covered with a sponge material except end parts, and a means to move the presser to the forward end of the rubber sheet material and place the presser on the rubber sheet material while the rubber sheet material is being stuck to the building drum and finally separate the presser from the building drum after the sticking is completed.

Abstract: A rubber composition is disclosed which contains, as a rubber component, 20-100% by weight of (A) polybutadiene polymerized by using a lithium initiator and 80 to 0% by weight of (B) another rubber component. The polybutadiene has the following physical properties (i)-(v):(i) The molecular weight distribution of Mw/Mn is 1.4 to 3.0 in which Mw and Mn are a weight average molecular weight and a number average molecular weight, respectively;(ii) A polymer component having the molecular weight being not more than 10.sup.5 when calculated as polystyrene is from 7 to 25%;(iii) The content of bound vinyl groups is from 10 to 25%;(iv) The content of tin atoms bonded to the polymer by tin-carbon bonds is not less than 50 ppm;(v) Mooney viscosity (ML.sub.1+4, 100.degree. C.) is from 20 to 70.

Abstract: A heavy duty pneumatic radial tire for use in airplanes and the like is disclosed, which comprises a toroidal radial carcass, a belt superimposed about a crown region of the carcass, and a bead portion reinforcement comprised of a main chafer made from aromatic polyamide fiber cords, and an auxiliary chafer of at least two outer cord layers and at least two inner cord layers having a triangular truss structure defined by three cord layers among such four cord layers that the cords of the two outer cord layers are crossed with each other with respect to the meridional plane of the tire and the cords of the two inner cord layers are crossed with each other with respect to the meridional plane.

Abstract: A tubular belt conveyor can transport powdered or granular material without leakage. To roll up a flat belt into a tubular shape, a belt guiding device is provided in the vicinity of a front or a rear end roller. The belt guiding device comprises a base plate and a plurality of guide frames provided on the base plate. In the guide frame, a plurality of guide rollers are arranged like a circle through which the belt to be rolled up passes. The diameter of the circle formed by the guide rollers increases gradually towards the front or the rear end roller to prevent the belt from slacking so that smooth running may be assured.

Abstract: Disclosed herein is a rubber composition for use in vibration insulating material, which comprises as rubber components 5-50 parts by weight of a copolymer consisting of 99.5-45% by weight of a conjugated diolefin, 0.5-30% by weight of an ethylenically unsaturated carboxylic acid and 0-40% by weight of another vinly monomer polymerizable therewith, and 50-95 parts by weight of at least one rubber selected from natural rubber and synthetic diene rubbers. This rubber composition is excellent in the breaking properties and vibration insulating properties with a small temperature dependence of hysteresis loss.

Abstract: A heavy duty pneumatic radial tire for use under a high speed and a high internal pressure, is disclosed, which comprises a plurality of carcass cord layers of which cords are arranged at an angle from 90.degree. to 75.degree. with respect to a circumferential direction of the tire. The cords are composed of fibers of an aromatic polyamide having not less than 80 mole % of a repeating unit expressed by the following formula: --NH--Ar.sub.1 --NHCO--Ar.sub.2 --CO-- in which Ar.sub.1 and Ar.sub.2 denote at least one kind of an aromatic residue selected from: ##STR1## Elongation E.sub.n (%) of the aromatic polyamide fibers constituting the respective plies meets the following inequation:E.sub.n-1 +0.2.ltoreq.E.sub.n .ltoreq.E.sub.n-1 +2.0in which E.sub.n is an elongation (%) of the n-th layer of the carcass cord layers, provided that the carcass cord layers are taken as 1st ply, 2nd ply, 3rd ply, . . . , n-th ply from the inner liner side in which n is an integer of 2 or more, and E.sub.

Abstract: A pneumatic radial tire for airplanes comprises a carcass composed of plural organic fiber cord plies and a belt composed of a combination of cross belt layer structure and circumferential belt layer structure. The cross belt layer structure is comprised of at least two organic fiber cord layers, the cords of which layers being crossed with each other, and the circumferential belt layer structure is comprised of at least two organic fiber cord layers in such a manner that the number of cross belt layers is made larger at both side regions of the tread than at the central region thereof and the number of circumferential belt layers is made larger at the central region than at both side regions.

Abstract: An air spring comprises an air sleeve airtightly connected at both end portions to a piston and an end cap. The air sleeve has a substantially tapered form as a whole, wherein a portion forming a turned-up portion under a service stroke is a circumferentially continuous thin-gauge portion and a portion adjacent to at least one end of the thin-gauge portion is a circumferentially continuous thick-gauge portion.

Abstract: In a cylindrical tire forming member building method or apparatus, after the front end portion of a belt-shaped material is pressed against the drum, the belt-shaped material is wound on the drum while being centered, and with the central portion of the rear end portion of the belt-shaped material pressed against the drum with a robot hand, both edge portions of the rear end portion of the belt-shaped material are elongated longitudinally and pressed against the drum with the robot hand, so that the front and rear ends of the belt-shaped material are butt-joined without forming a gap therebetween or without being overlapped.

Abstract: A vibration isolating apparatus is interposed between a vibration generating portion and a vibration receiving portion. The apparatus includes a main body which has a portion thereof constituted by a resilient member. The main body is provided with a liquid chamber which is capable of being expanded and contracted. The liquid chamber is divided by a partition member into small liquid chambers which are communicated with each other through an orifice. The orifice is able to absorb low-frequency vibrations but unable to absorb high-frequency vibrations. For this reason, a resilient membrane is provided between the small liquid chambers in such a manner as to suppress the rise in pressure inside the small liquid chambers so that high-frequency vibrations are also absorbed.

Abstract: A non-aqueous electrolyte secondary cell is provided which comprises a positive electrode active material of a modified vanadium pentoxide, a negative electrode active material of lithium or lithium alloy, and a non-aqueous electrolyte.

Abstract: A rubber composition comprises 1-30 parts by weight of particular cyclopentadiene series resin based on 100 parts by weight of rubber and exhibits improved cut resistance and chipping resistance.

Abstract: A rubber composition having improved weather resistance, thermal resistance, resistance to crack growth and wear resistance comprises not less than 20 parts by weight of a rubber composed mainly of ethylene, propylene and diene and satisfying all of particular requirements. Further, the rubber composition is applied to a tread and/or a sidewall of a pneumatic tire for improving a tire appearance.

Abstract: In a pneumatic radial tire for motocross, since only the central portion of the tread is in contact with a ground in the ordinary travel, a peculiar stress is generated at one end of the belt layer due to the directional relationship between the inclination direction of the outermost belt layer and the tire rotational direction, thus resulting in cracks in the outermost belt. To overcome this problem, the tire is covered with an auxiliary layer of textile cords arranged perpendicular to the belt outer layer cords on one side of the belt where compressive stress is produced, in order to reinforce the belt.

Abstract: To prevent tire unbalanced abrasion, that is, tire unbalanced rigidity between the acute angle corners and the obtuse angle corners of blocks forming a tire tread pattern, without decreasing the tire drainage and increasing tire pattern noise, block side walls extending along the main circumferential grooves are sloped down to the bottom of the main grooves in such a way that an inclination angle between the tread surface normal line and the block side wall increases gradually from the obtuse angle corners of the blocks to the acute angle corners thereof. Preferably, the inclination angle is 8 degrees at the obtuse angle corner and 25 degrees at the acute angle corner on the wide main circumferential groove, and 7 degrees at the obtuse angle corner and 13 degrees at the acute angle corner on the main circumferential grooves adjacent to the wide main groove.

Abstract: A vibration isolating apparatus is provided with a liquid chamber which is capable of being expanded and contracted for the purpose of absorbing vibrations. The liquid chamber is partitioned into small liquid chambers by a resilient membrane, the chambers being communicated with each other through an orifice. Vibrations are transmitted to the small liquid chambers through a transmission shaft which extends through the resilient membrane and which is slidable relative to the membrane. Accordingly, even when the direction in which vibrations act changes, vibrations applied to one small liquid chamber are reliably transmitted to the other small liquid chamber. Thus, contraction of one small liquid chamber causes the other small liquid chamber to expand, and a liquid is forced to pass through the orifice while generating fluid resistance whereby the vibrations are absorbed.

Abstract: A heavy duty pneumatic bias tire having a thick case gauge is disclosed, which comprises a carcass of a bias structure composed of a plurality of carcass plies each containing organic fiber cords and a plurality of bead rings spaced from each other in each of bead portions of the tire, both end portions of a plurality of the carcass plies being turned-back around each of the bead rings from the inside to the outside of the tire. In the tire of this type, the ends of the carcass plies turned-back around the bead rings except the axial innermost bead ring are positioned in the outside of the region "C" between the planes "A" and "B" in each of sidewall portions of the tire.

Abstract: A vibration isolating apparatus has a pair of small liquid chambers which are communicated with each other through an orifice. A partition which divides the small liquid chambers is provided with a vibrating plate in order to suppress rise in liquid pressure within the small liquid chambers. When a vibration of extremely low frequency is input, a part of a flexible membrane which defines a part of the liquid chamber is pressed against the vibrating plate by the action of a restraining means to prevent vibration of the vibrating plate. Accordingly, the occurrence of resonance of the liquid within the orifice is ensured, and the vibration is thereby effectively absorbed.

Abstract: An electromagnetic coupling selectively transmits power from an automobile engine to a supercharger. The electromagnetic coupling includes a rotor having excitation coils thereon and rotatable by the drive source, an armature magnetically attractable in a direction toward the rotor for rotation therewith in response to energization of the excitation coils, an outer holder plate mounted on the armature and having a first flange, an inner holder plate connected to the supercharger and disposed radially inwardly of the outer holder plate, the inner holder plate having a second flange positioned concentrically with and spaced from the first flange, and an elastomeric member disposed between and joined to the first and second flanges. The elastomeric member has a thickness in the direction toward the rotor which is progressively increased from the second flange toward the first flange.