Abstract: A pneumatic tire for motorcycles comprises a tread, a pair of sidewalls each toroidally extending from each side end of the tread, a carcass comprised of at least one cord ply arranged at a cord angle of 75.degree.90.degree. with respect to an equator of the tire, and a belt arranged between the tread and the carcass and comprised of at least two cord layers. In this tire, the belt is comprised of at least innermost cord layer located at a carcass side and at least one cord layer located at a tread side and comprised of a cord spirally wound in the circumferential direction of the tire so as to extend in the widthwise direction of the tire, in which a widthwise end of at least one cord layer located at the carcass side is located within a particular region to tread width and sidewall height.

Abstract: A heavy-duty radial tire including a carcass and four steel cord belts bearing most of stress of the tire. The carcass and the belts cross each other. An outer side belt layer of two belt layers of different cord diameters which are defined by the belts being divided into the two belt layers, the outer side belt layer being a belt layer of the two belt layers which is disposed at an outer circumferential side of the tire in a radial direction thereof; and an inner side belt layer disposed further toward an inner circumferential side of the tire in the radial direction thereof than the outer side belt layer. A difference between belt cord angles of respective belts of the outer side belt layers is less than or equal to 5.degree.. A difference between belt cord angles of respective belts of the inner side belt layers is less than or equal to 5.degree.. Further, 1<.PHI. out/.PHI. in.ltoreq.2.5, and .alpha. in-.alpha. out.gtoreq.5.degree. and (.alpha. out+.alpha. in)/2.ltoreq.23.degree., wherein: .PHI.

Abstract: An off-the-road pneumatic steel radial tire comprises a radial carcass comprised of at least one carcass ply containing steel cords and a belt superimposed about a crown portion of the carcass and comprised of at least three laminated steel cord layers. In this tire, the belt includes at least two main belt layers each containing substantially inextensible steel cords, in which steel cords included in at least one of these main belt layers satisfy conditions that a cord diameter is. the same in this layer but different from that of the remaining main belt layer, and a ratio of cord diameter in these main belt layers is within a range of 1.2-3.0, and a ratio of total breaking load of cords in these main belt layers per unit width is within a range of 1.1-2.0 times.

Abstract: A heavy-duty pneumatic tire having a plurality of belt layers, wherein the outermost belt layer is made of a steel cord having a breaking extension of 4% or more and covers the end portion in the width direction of a first belt layer adjacent to the undersurface of said outermost belt layer, a rubber stock is provided on the outside of the end portion in the width direction of said first belt layer, the cord of said first belt layer and the cord of a second belt layer adjacent to the undersurface of said first belt layer are each inclined at an angle of 15.degree. to 25.degree. with respect to the circumferential direction of the tire and cross each other.

Abstract: A radial tire is comprised of a belt, disposed between a carcass and a tread, having metal cord plies including a first belt ply, a second belt ply, a third belt ply and a fourth belt ply which are arranged radially outwardly in that order, wherein the second belt ply has a curvature concentric with the curvature of a radially outer surface of the tread and a width (B2) of at least 93% of the tread width (W), and the third belt ply has a width (B3) smaller than the width (B2) and is provided at both ends with spaced parts 1.5 to 4.5 mm distance apart from the second belt ply, the third belt ply, in a central part having a width (CR) of 60 to 70% of the width (B3) and both end parts each having a width (b) of 5 to 15% of the width, the third belt ply having a curvature concentric with the curvature of the radially outer surface of the tread.

Abstract: A radial tire for motor cycles having a belt layer composed of a first belt ply B1, a second belt ply B2 and a third belt ply B3 with includes a respective base part of A1, A2 and A3 superimposed one upon another on a carcass. The first belt ply B1 has lateral skirts F folded radially outwardly at both lateral edges of the base part A1. The skirts F cover the lateral cut end of the second belt ply B2 and are overlapped with the third belt ply B3 so as to improve the adhesion to the tire rubber and the rigidity of the tread shoulder. Furthermore, the ratio BW/TW of the belt width BW to the tread width TW is set to be 0.75 or more, the ratio FW/TW of the skirt width FW to the tread width TW is set to be 0.01 to 0.35, and the ratio OW/FW of the overlapped width OW to the skirt width FW is set to be 0.7 or more.

Abstract: The problem of recycling scrap radial tires is addressed by providing many uses for a laminate made by bonding two or more belt sections of a radial tire, the sidewalls of which have been cut away, the tire then cut open, and de-treaded. The result is a multi-ply structure which is sensibly rigid in all three directions because each belt ply in a belt is reinforced with cords at an angle, the cord angle in one belt ply being opposed to the angle in the other. A slat, bar, or beam, formed with plural belts is essentially rigid in a direction at right angles to its longitudinal axis, because for bending to occur, one belt must be in tension and the other in compression. Neither condition is favored because of the opposed cord angles and belt geometry. Though essentially rigid because of the cord geometry, the amount of rubber in the laminate allows it to be deformable relative to wood or steel having the same thickness.

Abstract: A pneumatic tire reinforced by a reinforcing belt is provided, the reinforcing belt having at least one cord reinforced ply, and, in turn, the cord reinforced ply having a plurality of substantially parallel spaced apart elongated cross-section reinforcing cords. The ply may be a bias ply in which the reinforcing cords are disposed at a bias angle, or it may be an overlay ply being axially longer than any other plies and having curving ends which overlay and curve over the ends of any other plies to strengthen shoulder portions of the pneumatic tire. Preferably, in the case of an overlay ply, the reinforcing cords are disposed substantially circumferentially. Preferably also, the elongated cross-section of the reinforcing cords is elliptic; and, the reinforcing cords are thermoplastic monofilaments formed by extrusion.

Abstract: A high durable pneumatic radial tire includes reinforcing belts of at least four cord layers whose cords are arranged in parallel with each other and coated with rubber. These cord layers are laminated about a crowd region of a radial carcass with the cords intersecting with each other over a crown circumference to reinforce a tread of the tire. The cord layers are divided into two groups of positive and negative signs by signs of inclined angles of projections of the cords of the respective cord layers onto an imaginary coordinate plane including a rotating axis of the tire. The cord layers in each of the groups are wider as they are arranged on further radially outer sides. The maximum width of the cord layers of the one group is much narrower than a maximum width of the cord layers of the other group. In this manner, shearing strains caused by load acting upon the tire in rubbers between the cord layers near to side ends of the cord layers in contact with a tread rubber on the reinforcing belts.

Abstract: Disclosed is a belted tire for vehicles, which comprises a toroidally curved body of elastic material with a tread surface at the outer periphery and a circumferentially extending annular belt construction which is embedded as an insert in the elastic material of the body in the region of the tread surface and which comprises two parts, namely a circumferential belt for circumferential stiffness and a transverse belt for transverse stiffness. The circumferential belt has a number of annular strength supports which are arranged in laterally spaced juxtaposed relationship in at least one plane and which extend in the circumferential direction of the body, and the transverse belt has at least one transverse bracing strength support which extends approximately over the width of the tread surface and which is embedded in the elastic material in parallel relationship and at a spacing from the circumferentially extending strength supports of the circumferential belt.

Abstract: A pneumatic radial tire includes a carcass anchored to a pair of beads, and laminated belts having at least two belt layers circumferentially extending outside of a crown portion of the carcass and consisting of cords intersecting between adjacent belt layers. One of the laminated belts is divided in circumferential directions of the tire into a center portion and two side portions. A divided width A of the divided belt from its center to its divided points has a relationW/4.ltoreq.A<Wwhere R is a half of a width of another laminated belt. Directions of cords of the center portion and the side portions of the divided belt are substantially the same, while cord angles .alpha.out of the cores of the side portions of the divided belt with the circumferential directions are larger than cord angles .alpha.c of the center portion of the divided belt with the circumferential directions.

Abstract: A speed rated tire (10) is provided with an overlay structure (20) disposed radially outwardly of the belt structure (17). The overlay structure comprises a single ribbon (22) of side-by-side textile cords spirally wrapped about the belt structure such that both ends of the ribbon are in close proximity to the equatorial plane (EP) of the tire, while the axial width of the overlay structure is at least equal to that of the belt structure. The number of radial layers of cords in the overlay structure being greater at the axial edges of the belt structure than the average number of radial layers of cords in the remainder of the overlay structure. A method of manufacturing such an overlay structure is also disclosed.

Abstract: A high inner pressure heavy duty pneumatic radial tire includes a carcass of a plurality of plies made of laminated organic fiber cord layers of which one ply is turned up about bead cores, and a belt made of a plurality of laminated cord reinforcing layers. The belt includes at least one set of packing structural reinforcing layers. Each of the packing structrure reinforcing layers includes cord reinforcing layers wider than a width of the arranged belt and having width edges folded inwardly to form folded layers and further cord reinforcing layers having widths as cut corresponding to inner widths of the folded layers and surrounded by the folded layers to form inner core reinforcing layers. The further core reinforcing layers are higher in circumferential rigidity than the first mentioned core reinforcing layers. Cords of the first mentioned cord reinforcing layers and the further core reinforcing layers are made of material substantially the same at least in modulus of elasticity.

Abstract: To improve traveling stability, riding comfort, high-speed durability, etc., the uniformity in the main belt of a belted tire is improved by dividing an auxiliary layer into at least three areas in an axial direction of the tire, and both ends of the three divided auxiliary layers are bonded in the divided areas at different bonding positions, respectively, in circumferentially spaced relationship to each other. In particular, lateral force variation of the tire is reduced and separation trouble at the auxiliary layer bonding area can be settled.

Abstract: Disclosed is a belted tire for vehicles, which comprises a toroidally curved body of elastic material with a tread surface at the outer periphery and a peripherally extending annular belt construction which is embedded as an insert in the elastic material of the body in the region of the tread surface and which comprises two parts, namely a peripheral belt for peripheral stiffness and a transverse belt for transverse stiffness, wherein the peripheral belt has a number of annular strength supports which are arranged in laterally spaced juxtaposed relationship in at least one plane and which extend in the peripheral direction of the body, and the transverse belt has at least one transverse bracing strength support which extends approximately over the width of the tread surface and which is embedded in the elastic material in parallel relationship and at a spacing from the peripherally extending strength supports of the peripheral belt, and wherein the transverse belt is stretchable in the peripheral direction o

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: 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: 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: A high performance tire, in which a plurality of narrow cuts are disposed on both shoulder parts where heat generation is most notable, to control the heat generation by decreasing the pattern stiffness. The slippage of tread rubber is prevented due to improved grounding performance of both shoulder parts, so the high-speed durability and the stepped shoulder wear are improved in spite of the extra heavy tread with deepest longitudinal main grooves. At the same time, wear life of the tread, wandering performance including wet grip performance, ride feeling and handling stability can effectively improved in a well-balanced manner.

Abstract: The tread reinforcing belt structure (24) of a pneumatic tire (10) has at least one belt ply (29) of flat steel wire. The belt ply of flat steel wire is stiffened by other components of the tread reinforcing structure such as belt plies of steel cables (28,30). It is especially important that the axially outermost edge portions of the belt ply of flat steel wires be supported by other components of the tread reinforcing belt structure, and that the flat wire have specific cross-sectional dimensions.

Abstract: A passenger car pneumatic tire excellent in ride feeling, wherein a tread is reinforced by a belt consisting of plural metal cord layers so piled that the cords are intersected with one another and the following relation is met:-1.5.ltoreq.[(S/So)-1].times.100.ltoreq.-0.1in which S is the maximum tire width in the state that the tire is fitted to a normal rim while being filled with air at a pressure of 1.7 kg/cm.sup.2 and So is the tire maximum width after being mounted onto a rim but prior to the air pressure being applied to the tire.

Abstract: In a pneumatic tire of a structure in which a belt-reinforcing layer is overlaid and interposed between a tread and a carcass cord layer, the belt-reinforcing layer consisting of a transient-reinforcing layer positioned in contact with the carcass cord layer with its reinforcing cords disposed at an angle of between 40.degree. to 75.degree. with respect to the circumferential direction of the tire, and at least two belt-resistant layers, the lower one thereof being laid over the transient-reinforcing layer with its reinforcing cords disposed at an angle of between 15.degree. to 30.degree. with respect to the circumferential direction of the tire, and the upper one with its reinforcing cords disposed at an angle of between 150.degree. to 165.degree. thereto, the tire is improved in that the carcass cord layer is formed of a single layer and the reinforcing cords in the carcass cord layer are arranged so that their angle with respect to the circumferential direction of the tire is between 75.degree. to 85.

Abstract: A large-size pneumatic radial tire for use on rough road is disclosed, which comprises as a tire reinforcement a carcass ply of cords arranged in a direction substantially perpendicular to the equatorial plane of the tire and a belt composed of at least three cord layers each containing steel cords embedded parallel to each other in rubber and arranged at a relatively small angle with respect to the equatorial plane of the tire, at least a pair of adjacent cord layers among which being piled one upon the other to cross their cords with each other at an angle of 15.degree.-30.degree. with respect to the equatorial plane. In this type of the tire, the outermost cord layer for the belt is a cord layer formed by embedding a plurality of twisted steel cords, each having a single layer construction of 1.times.3, 1.times.4 or 1.times.

Abstract: A pneumatic tire for motorcycles is disclosed, which comprises a tread portion defining a maximum width of the tire, a pair of sidewall portions, a pair of bead portions, a carcass of radial or semi-radial structure composed of at least one rubberized cord ply containing organic fiber cords therein, and a belt superimposed about a crown region of the carcass and composed of at least one cord layer containing cords with a modulus of elasticity of at least 600 kgf/mm.sup.2 arranged at an angle of not more than 30.degree. with respect to the equatorial plane of the tire, and has an aspect ratio of not more than 86%.

Abstract: A heavy duty low-section pneumatic and a process for manufacturing the same are disclosed. This tire comprises a radial carcass toroidally extending between bead portions, a belt composed of a first and second belt layers successively superimposed around a crown portion of the carcass and a tread rubber having substantially the same width as the maximum width of the belt. In the belt, the first belt layer is composed of at least two cord plies each containing cords inclined at a small angle with respect to the equatorial plane of the tire, the cords of which being crossed with each other with respect to the equatorial plane, while the second belt layer is composed of at least one cord ply containing non-expansible or hardly expansible cords arranged in substantially parallel to the equatorial plane and extends over both sides of the first belt layer between the first belt layer and the carcass.

Abstract: A pneumatic radial tire comprising a belt portion disposed between the tread portion and the carcass portion wherein the belt portion is constituted by at least a pair of first belts, a second belt and a third belt which are arranged from radially inward to outward, the first, second and third belts having a first series, second series and third series of parallel cords embedded therein, respectively. The first belts being laterally spaced apart a predetermined lateral space symmetrically with respect to the mid-circumferential centerline and the cords thereof are disposed at an angle of between 40 to 60 degrees with respect to the mid-circumferential centerline. The spaced-apart first belts have opposite lateral ends which are located within less than 5 percent of a belt width of the third belt from the corresponding opposite lateral ends of the third belt, respectively.

Abstract: A reinforcing structure for a rubber article includes a first annular ply disposed in the article. The first ply has a cord construction and includes a plurality of parallel cords which are disposed at an angle with respect to the midcircumferential centerplane of the article. A second annular ply is disposed in the article and is spaced radially outwardly from the first ply. The second ply also has a cord construction and includes a plurality of parallel cords which are disposed at an angle with respect to the midcircumferential centerplane of the article in a direction opposite to the direction of the cords of the first ply. A third annular ply is disposed in the article and is positioned between the first and second plies and is bonded thereto. The third ply has a cord construction and includes a plurality of parallel cords which form a 0.degree. angle with respect to the midcircumferential centerplane of the article.

Abstract: A heavy duty pneumatic radial tire having an improved service durability is disclosed, which comprises a radial carcass and a belt composed of at least three belt layers. In this tire, the belt has a so-called middle removed structure, wherein a pair of first belt layer portions are arranged at both sides of the belt near the carcass across the mid-circumference of the tire, and further a pair of insert cord plies having a particular tensile modulus per unit width are interposed between the first and second belt layers.