Abstract: Pneumatic tire is provided with a belt layer including a first belt ply of which width is more than 0.9 times and less than 0.95 times the tread width and a second belt ply of which width is more than 0.88 times and less than 0.92 times the tread width, that are arranged in sequence from a carcass side.One of the belt plies is composed of two belt ply parts which are separated by a gap on the tire's equator. The other belt ply is composed of a middle belt ply part and two side-belt ply parts which are separated by a gap at two division points each spaced apart from the equator in the axial direction by a distance of 0.2 to 0.3 times the other belt ply width.Initial elasticity EA of the middle belt ply part is preferably larger than the initial elasticity EB of the other belt ply parts, especially, the ratio EA/EB is more preferably 2.0 or more and 4.0 or less.The gaps are preferably 0.5 mm to 4.0 mm.

Abstract: A heavy duty pneumatic radial tire running on rough road at high speed and having plural belt layers of steel cords comprises at least a pair of auxiliary protective strips superimposed on the belt layer so as to cover both end portions of the belt layer and protrude outward from the end portion, wherein cords of the auxiliary protective strips are inclined at an angle of 25.degree.-25.degree. with respect to the circumferential direction of the tire and are the same direction as in the cord direction of the belt layer supporting the auxiliary protective strips.

Abstract: A tire for a motorcycle having an arcuate shaped cross-section with a height to width ratio between 0.20 and 0.35 and a carcass reinforcing structure having first and second strips. The first strip is made up of mutually parallel cords having a thickness not exceeding 80 cords/dm at an angle between 22.degree. and 35.degree. to the equatorial plane. The second (radial outer) strip also has mutually parallel cords but these cords, as compared with those of the first strip, have less thickness, a lower elasticity modulus and are at an angle between 18.degree. and 30.degree. and in the opposite sense with respect to the tire equatorial plane.

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 tire for a motorcycle comprising a tread, sidewalls extending inwardly from both ends of the tread in a radial direction, bead portions positioned at the radially inward ends of the sidewalls, a toroidal reinforcement carcass composed of reinforcement cords which extend approximately parallel with each other in the radial direction of the tire and of which both end portions are turned up around bead cores, a breaker arranged on the radially outer side of the carcass, the breaker comprising reinforcement tire cords whose tensile strength is not less than 7 g/d and initial modulus is not less than 200 g/d laid at angles of 10.degree. to 45.degree. to the circumferential direction, and a band over the breaker and having a width greater than the breaker so as to axially extend past the outermost edges of the breaker and comprising parallel reinforcement cords laid at angles of 10.degree. to 25.degree.

Abstract: The present invention relates to a radial tire and a radial tire-rim assembly. The radial tire (1) has a pair of beads (2), each bead having a bead core (3) and a bead apex (5), a carcass (4), with both edges thereof folded back around said bead core and fastened to said bead core, a tread (6), a belt layer (7), and an aspect ratio smaller than 60%. The tread is wider (in the axial direction) than the maximum width of said carcass and the edges of said tread are positioned within a range of 50-100% of the height of the cross-section of the carcass. This structure provides the tire side with rigidity and permits the tread to deform so that it supports the weight of the car and runs safely even when the tire pressure is decreased. The radial tire-rim assembly is characterized in that the bead of the radial tire has a toe (9) extending inward (in the radial direction of the tire) and is further provided with a hump groove (10).

Abstract: A pneumatic tire (10, 40) having a belt reinforcing structure (24) located between the carcass (12) and the tread portion (20) is reinforced with an overlay belt (30) located between the belt reinforcing structure (24) and the tread (20). The overlay belt (30) has a plurality of parallel cords (32) oriented at an angle with respect to the equatorial plane (EP) of the tire. The angle of the cords (32) is between 9.degree. to 24.degree. degrees. The overlay can be used by itself or in conjunction with a pair of belt reinforcing strips (42) located radially outwardly along both axial edges (46, 48) of one of the belts (26, 28) of the belt reinforcing structure (24). The belt reinforcing strips (42) also contain a plurality of cords (50) oriented at an angle of from 9.degree. to 24.degree. with respect to the equatorial plane of the tires.

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 having a low noise and an improved cornering stability has a belt structure of at least two belt layers composed of at least one layer containing cords each obtained by twisting organic fibers and at least one layer containing steel cords, at least one of the organic fiber cord layers being interposed between the steel cord layer and a tread at a state that both transversely outermost end portions are folded inward. This organic fiber cord is a cord obtained by twisting high strength, high modulus polyvinyl alcohol fibers and has particular twisting coefficient and strength. The tire further satisfies a particular relation between a height of a turnup portion of a carcass ply around a bead portion and a tensile stress at 50% elongation of a bead filler rubber reinforcing the bead portion at room temperature.

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 pneumatic radial tire having improved cornering stability, service durability and rolling resistance is provided by using high-elasticity, high-strength vinylon fiber having specified elongation and strength as a cord material for at least one belt layer in a belt composed of at least two belt layers. Particularly, noise level can be reduced without damaging other tire performances by combining at least one layer of high-elasticity, high-strength vinylon fiber cords with at least one layer of steel cords as a belt of the tire.

Abstract: Reinforcing layers for bias tires comprising a laminated structure of a steel cord ply and composite cord plies made of aramid yarns and nylon yarns, said composite cord plies being disposed radially outwardly of the steel cord ply maintaining a full space between steel cords and composite cords and a nominal total denier of said composite cords being in the range of 4,000-10,000.

Abstract: A radial tire for passenger cars, comprising: a pair of bead cores; a radial carcass ply, the edges of which are turned up around bead cores; a tread; a belt layer composed of at least two plies of steel cords; and band layers folded over at the edges of the belt layer to form an upper layer portion radially outside the belt layer and a lower layer portion radially inside the belt layer, wherein the band layers are composed of organic fiber cords inclined by 5 to 45 degrees to the circumferential direction of the tire. A gap distance G1 between the upper layer portions of the band layers is in a range of 35 to 65% of the width WB of the belt layer, and the width W2 of the lower layer portion is longer than the width W1 of the upper layer portion and their difference W2-W1 is in a range from 5 to 20 mm.

Abstract: The invention relates to a breaker belt structure to be used in pneumatic tires, in particular in those of the radial carcass type. The structure comprises a radially outer strip of circumferentially arranged cords (61), preferably but not exclusively made of textile material, as polyamide or aromatic polyamide, and two felted layers (62), (63), situated in a radially inner position, which comprise an elastomeric or plastomeric supporting material and a reinforcing filler of aramide pulp oriented along a preferred direction which is inclined with respect to the circumferential direction, the preferred directions of orientation in the two felted layers being preferably inclined symmetrically to each other at an angle of 45.degree. with respect to said circumferential direction.

Abstract: A tire for an airplane comprises a pair of bead cores; a carcass fixed around the pair of bead cores with its ends being turned up, the carcass having cords arranged at an angle of 60.degree. to 90.degree. with respect to an equator plane of the tire; a belt layer having cords arranged outside the carcass at an angle of 0.degree. to 30.degree. with respect to the equator plane of the tire; and a band arranged above the belt layer. The band has cords which have a higher modulus of tensile elasticity than that of the cords of the belt layer. The cords of the carcass and the belt layer are made of organic fibers having a modulus of tensile elasticity not greater than 1,000 kg/mm.sup.2. The tire may include a bead apex and a reinforcement layer positioned outside of the head apex. The reinforcement layer extends from a bottom of each of the pair of bead cores to a side wall of the tire.

Abstract: Pneumatic radial tires are disclosed which are comprised of two or more belt plies reinforced respectively with an aramid fiber cord and a steel wire cord. Both cords are coated with one and the same rubber composition made up of a selected class of starting rubbers, sulfer, resorcinol and/or its precondensate, hexamethoxymethylmelamine and a selected class of cobalt compounds derived from organic acids. The belt plies excel in water-resistant adhesion and heat resistance and thus have freedom from ply separation, contributing to a radial tire of improved durability.

Abstract: A radial tire for a motorcycle comprising a carcass ply and a breaker disposed radially outside thereof and comprising a first ply lying on the carcass ply and a second ply lying radially outside the first ply, wherein the carcass ply is composed of cords arranged radially at an angle of 70 to 90 degrees to the tire equator and having an elastic modulus MC of 250 to 600 kgf/sq.mm; the first ply of the breaker being composed of cords arranged at an angle of 10 to 30 degrees to the tire equator and having a elastic modulus MB1 of 450 to 1100 kgf/sq.mm; the second ply of the breaker being composed of aromatic polyamide cords arranged at an angle of 10 to 30 degrees to the tire equator and having a elastic modulus MB2 of 650 to 1600 kgf/sq.

Abstract: A tire with a radial carcass having a breaker structure that comprises two radially overlapped layers of metallic fabric reinforced by cords transversely disposed with respect to the circumferential direction of the tire. These cords are crossed over each other and, on each axial extremity of the two layers, there is positioned at least a rubberized fabric strip reinforced by metallic cords of high elongation (HE) or very high elongation (VHE) in combination with Hybrid textile cords (Aramide/Polyamide) disposed in the circumferential direction and having, in the vulcanized tire, a modulus of elongation of non-increasing value passing from the axially outermost cord to the axially innermost one. This strip is suitably constructed by the coupling of cords of (axially from the outside to the inside) HE-VHE (High Elongation--Very High Elongation), HE-Hybrid (High Elongation--Aramide/Polyamide) and VHE-Hybrid.

Abstract: A radial-ply passenger or light truck tire (10) having an annular tread-reinforcing structure (24) located between the tread portion (12) and the carcass (18). The tread-reinforcing structure (24) has one belt ply of steel cords oriented at an angle A, with respect to the mid-circumferential centerplane, and a second belt ply of aromatic polyamide fiber cords oriented at an angle B with respect to the mid-circumferential centerplane of the tire. The angle B is less than the angle A and the difference between angle A and angle B is greater than zero and less than or equal to eight degrees.

Abstract: A pneumatic tire comprising: a pair of bead cores; a carcass turned over at its both ends around the bead cores; a tread on the carcass; a belt comprising at least two plies of steel cords and dispsoed radially outside the carcass; a pair of inner bands disposed between the carcass and the belt and each having strecthable cords made of organic fibers, the inner band cords laid substantially parallel to the tire equator; and the axially outer edge of the inner bands and the edges of a widest ply of the belt being substantially trued up, whereby both steering stability and high speed durability are improved.

Abstract: A radial tire with a split structure in the first belt layer provided with an organic fiber cord layer in the split structure and having a narrow groove extending in the circumferential direction of the tire and provided in each of both shoulder portions of the surface of a tread, wherein the narrow groove has a depth h determined in the radial direction of the tire, and a distance d.sub.1 measured between the internal edge on the shoulder side of an opening portion of the narrow groove and the radially outermost surface of the shoulder portion as determined along a parallel line to the surface of the tread, and a distance d.sub.2 measured between the internal wall surface on the shoulder side of the bottom of the narrow groove and the radially outermost surface of the shoulder portion as determined along a parallel line to the surface of the tread, wherein d.sub.1 is less than 15 mm and is smaller than d.sub.2, and a shape factor m defined by the following equation is 0.8 to 1.

Abstract: An improvement in the structure of the belt portion of a heavy duty radial tire for use in trucks, large-size buses, small-sized trucks, etc., and more particularly, a heavy duty pneumatic radial tire improved with respect to the driving stability under heavy duty conditions while ensuring the durability of the tire (belt portion) during high speed running through the provision of at least three belt layers between the tread surface and the carcass layer of the tire and the specification of the relationships between the angles of the cords constituting these plurality of belt layers.

Abstract: A pneumatic tire (1) comprises a radial carcass (2), a tread portion (7) and a belt reinforcing structure (8) extending circumferentially around the carcass (2). Disposed radially outwardly of the belt reinforcing structure (8) is a textile reinforced overlay structure (9) having substantially circumferentially extending cords (10). The overlay structure (9) is composed of a series of helical convolutions of a textile ribbon (11) whereby adjacent helical convolutions of the textile ribbon (11) overlap. There is further disclosed a method of applying multiple layers of a single continuous helically wound textile ribbon (11) in a single continuous operation from one axial side to the other axial side of the belt reinforcing structure (8).

Abstract: A directional type pneumatic tire, one that must be mounted on vehicle wheels to rotate in a specified direction of wheel rotation, having circumferential or rotary imbalanced belt ply cord strength and rigidity and directionally strengthened resistance to torsional stress forces in forward operational mode, which tire has a tire crown area and a cord carcass; the tire tread having two tread shoulder areas, and wherein the tire cord carcass belt ply assembly includes at least one two-piece confluent ply of relatively narrow belt ply cord material including cords positioned at high rigidity bias angles and each two-piece confluent ply being inclined in one rotary direction; the cord angles of said narrow confluent belt ply pieces inclined at commercially equal but opposite bias angles from an area under one tread shoulder across the carcass crown extending significantly beyond the circumferential centerline of the tire carcass and terminating significantly short of the area under the other tread shoulder.

Abstract: A pneumatic radial tire includes a belt layer consisting of a plurality of belt plies reinforced by cords. The cords of at least two adjacent belt plies are oblique in opposite directions with respect to an equatorial plane of the tire. The tire comprises a relieving ply overlapping the belt plies. A modulus of the relieving ply is less than that of the belt plies. A width of the relieving ply is wider than that of the belt ply having the widest width. Cords reinforcing the relieving ply is oblique with respect to the equatorial plane in the same directions as those of cords of the belt ply having the widest width. Separations at belt ends of the maximum width belt ply is effectively prevented.

Abstract: A radial tire comprising a pair of belt layer provided on a tread portion, a narrow reinforcing covers covering each of the edge portions of the belt layer, and a wide reinforcing cover provided on the narrow reinforcing covers so as to cover the full width of the belt layer, wherein the wide reinforcing cover has a multi-layer structure formed by winding a sheet in the circumferential direction of the tire so as to cause each successive layer to be put on top of a preceding layer.

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 radial carcass, belted tire (10) comprises an overlay ply (18) which provides the tire with high speed endurance without adversely affecting the uniformity of the tire. The overlay ply (18) comprises textile reinforcing elements consisting of successively aligned cord sections (21) arranged in parallel rows. Each cord section has a length which is comprised between 1/4 and 1/2 of the corresponding circumferential development of the tire. The cord sections (21) in each row have substantially equal length and are separated by interruptions (22) of a width such that the total width of the interruptions per circumferentially extending row of cords is less than 4% of the corresponding circumferential development of the tire.

Abstract: A heavy duty pneumatic radial tire includes a carcass consisting of at least one layer of metal cords substantially radially arranged, a breaker consisting of at least two layers of metal cords to form a main reinforcement with the carcass, and bead portions including hard and soft stiffeners. The carcass has a particular radial profile having a ratio of radii R/R' determined by a radius R' of a standard circle and a radius R determined by a particular definition and has a maximum distance f between an arc of the standard circle and the remaining carcass line smoothly extending from the profile curvature of the shoulder. Moreover a radial profile over a radially inner zone of the sidewall of 20-45% of the radial height SH has a curvature 1/.rho. less than 6.times.10.sup.-3 mm.sup.-1 at a location 32.5% of the radial height corresponding to a center of the profile.

Abstract: A heavy-load radial tire, comprising three or four belt layers of steel cords laminated at a slight angle with respect to the tire circumference direction in the central part of the outside of a carcass. An intermediate belt layer adjacent to the outermost belt layer has a cord strength which is at least 1.2 times greater than that of an inscribed belt layer which is inscribed in said intermediate belt layer. The end number of the intermediate belt is reduced so that the belt strength of the intermediate belt layer is substantially equal to that of the inscribed belt layer.

Abstract: There is described a novel fabric for use in tire building. The fabric is of open square construction and has a tackified finish to ease construction of tire carcases. A method of making the fabric is described as well as a method of making a tire using the fabric.

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 comprises (1) a pair of left and right bead portions, (2) a pair of left and right side-wall portions continuing from the respective bead portions, (3) a tread portion positioned between the side-wall portions, (4) a carcass layer provided between the left and right bead portions a cord angle of which is substantially 90 degree in relation to the circumferential direction of the tire, (5) an auxiliary carcass layer a cord angle of which is substantially 0 degree in relation to the circumferential direction of the tire, being placed on the tread side of the carcass layer substantially to correspond to the tread portion, so that the carcass layer and the auxiliary carcass layer may be crossed substantially at a right angle to form a net structure, and (6) a belt reinforcement layer having a tensile ridigity, at the circumferential of the tire, of not less than 10 kg/mm2, being placed on the auxiliary carcass layer substantially to correspond to the tread portion.

Abstract: A radial ply tire has a belt structure with a pair of edge strips of square woven fabric. A portion of each edge strip is disposed between a pair of belt plies that are adjacent to one another, and the edge strips may be folded around the respective axial edges of the radially innermost belt ply.

Abstract: A pneumatic radial tire for passenger vehicles, having a belt reinforcement layer consisting of a steel cord layer and a layer of aromatic polyamide fiber cords having its side ends bent over toward each other, wherein the layer of aromatic polyamide fiber cords is formed by embedding in covering rubber of a 100% modulus of 30 to 70 kg/cm.sup.2, 40 to 70 parallel aromatic polyamide fiber cords of 0.55 to 0.65 mm in diameter per 5 cm distance in the direction at right angle to the lengthwise direction of these cords.

Abstract: In a pneumatic tire of the type which consists of a pair of right and left beads, a pair of right and left side walls continuing the beads, respectively, and a tread interposed between the side walls, and in which a carcass cord layer is spread between the beads, and at least two layers consisting of a belt reinforcing layer whose reinforcing cords have a cord angle of from 15.degree. to 30.degree. with respect to the circumferential direction of the tire and a belt reinforcing layer whose reinforcing cords have a cord angle of from 150.degree. to 165.degree.

Abstract: A heavy duty pneumatic radial tire is disclosed, which comprises a carcass composed of at least one rubberized ply containing cords arranged substantially in a radial plane of the tire and a belt superimposed about a crown portion of the carcass just beneath a tread and composed of at least three rubberized belt plies. In this tire, metal cords of a first belt ply nearest to the carcass among the above belt plies are arranged at an angle of 25.degree.-50.degree. without crossing with metal cords of a second belt ply near the carcass next to the first belt ply with respect to a central circumferential line of the tire, and metal cords of the second belt ply and a third belt ply near the carcass next to the second belt ply, a tensile strength of each of which being 1.5-2 times that of the metal cord of the first belt ply, are arranged at an angle of 10.degree.-30.degree.

Abstract: An asymmetrical belt for a radial carcass pneumatic tire comprises two steel plies of which one ply is a single cut ply and the other ply is a folded ply comprising a main body portion and a radially outwardly folded portion. The two plies are arranged such that the single cut ply is situated radially outwardly of the folded ply with one end portion lying within the bite formed by the fold of the folded ply. The belt configuration further comprises a textile ply which extends across the median portion and the non enclosed end portion of the single cut ply. The textile ply is preferably composed of parallel cords making an angle of not more than 10.degree. with the mid-circumferential plane of the tire.

Abstract: A high-durable pneumatic radial tire is disclosed. In the tire of this type, steel cords each made from particular steel filaments are used in at least one of belt and carcass. This steel filament has a pearlite structure having an average value of interlamellar distance between cementites of 300-500 .ANG., and a tensile strength of not less than 220 kgf/mm.sup.2.