Abstract: A pneumatic vehicle tire comprises a single ply or multi-ply radial carcass anchored to beads, a tread, and a breaker arrangement provided between the carcass and the tread. The breaker arrangement is preferably built up of at least two cut breaker plies with the threads or cords of the cut breaker plies, which serve as strength carriers and extend parallel to one another in the respective ply, crossing at a predetermined angle to the central mid-circumferential plane. The tire also comprises at least one cover ply of cords or threads extending substantially in the circumferential direction of the tire, at least one cover ply surrounding the breaker arrangement at least in the breaker arrangement's edge regions. In the preferred embodiment the breaker arrangement (4) has threads or cords (9) of non-metallic material and a material with a low thermal shrinkage or no thermal shrinkage is used as the material for the treads or cords (8) of the at least one cover ply (5).

Abstract: A motorcycle tire in which the tread face is curved convexly so that the maximum cross-section width of the tire lies between axial edges of the tread portion includes a belt, and the belt comprises at least three plies, wherein the radially inner ply and radially outer ply are made of the same strip of rubberized parallel cords having a strip width of from 85 to 105% the tread width, and the middle ply is made of a strip of rubberized cords having a strip width which is different from that of the inner and outer plies.

Abstract: In the crown reinforcement (2) of a "heavy vehicle" tire, known as a high tire, the wires or cables of the triangulation ply (20) and the second working ply (22) are the widest of the reinforcement (2) and the radial distances between the respective wires or cables of the two plies at the level of their edges are at most equal to 1.5 mm over an axial distance l at least equal to 2% of the axial width L.sub.0 of the triangulation ply.

Abstract: A bias tire includes a reinforcement member disposed between a first carcass and an additional carcass in the crown region of the tire for restricting the circumferential growth of the tire. The reinforcement member includes a plurality of cords oriented at zero degrees. The total circumferential strength of the reinforcement member is about 20 to 250% of the circumferential strength of the carcass plies. The reinforcement member, first carcass, and additional carcass are formed on a tire building drum as a green tire component in a method of making the tire.

Abstract: A radial tire has a crown reinforcement (3) having at least two work crown lies (31, 32) of crossed inextensible metal cords, making angles of between 10.degree. and 45.degree. with the circumferential direction XX', and two limiting blocks (40) each composed of at least one ply of metal cords oriented at an angle of between 0.degree. and 10.degree., the blocks (40) being arranged in two separate regions on either side of the equatorial plane XX' and radially between the carcass reinforcement (1) and the radially outermost work crown ply (32). The two limiting blocks (40) are axially joined together by an additional reinforcement (41) which is composed of at least one ply of circumferentially oriented textile or metal cords and is centered on the equatorial plane XX', its tensile rigidity being at most equal to 0.5 times the tensile rigidity of the most extensible ply of the limiting blocks (40).

Abstract: A radial medium truck (RMT) tire has belt or breaker plies which are reinforced by organic reinforcement cords or filaments. In one embodiment, organic monofilaments are used in the belt or breaker plies which have the following characteristics: at least 2,000 denier (2,200 dTex), a tenacity of at least 3.5 g/denier (31 cN/TeX), an initial modulus of at least 30 g/denier (265 cN/Tex) and a shrinkage of at most 6%.

Abstract: In order to improve the endurance of the crown reinforcement (3) of a tyre, he H/S form ratio of which is at most 0.6, the latter is formed radially from the inside to the outside by a triangulation ply (31) of metal cables oriented at at least 60.degree. and two working crown plies (32, 34) formed of inextensible metal cables oriented at angles of between 10.degree. and 45.degree., between which there is inserted an additional ply (33) of metallic elements oriented substantially parallel to the circumferential direction of the tire.

Abstract: The radial pneumatic passenger car tire of this invention has three belt plies. The inner and outer plies are constructed essentially the same having the same cord material disposed at an angle of approximately 15 to 20 degrees. The belt reinforcing members in the inner and outer plies can be of a textile cord material or preferably are of a nylon monofilament material. The middle ply of the three belt plies has reinforcing members at an opposed cord angle to the other plies of approximately -15 to -20 degrees. The middle ply is made with reinforcing members being either of textile cords or preferably metallic cables.

Abstract: A pneumatic radial tire comprises a pair of bead cores, a carcass extending toroidally between the bead cores, a stiffener disposed one on each of bead cores and a belt comprising rubberized cord plies and disposed on a crown portion of the carcass, wherein the rubberized cord plies comprise a first rubberized ply having steel cords inclined with respect to the tire equatorial plane and at least one second rubberized ply having organic fiber cords extending substantially in parallel with the tire equatorial plane, the relation between the height H of the stiffener in the radial direction and the section height SH of the tire is given by 0.4 SH.ltoreq.H.ltoreq.0.6 SH, and the average thickness d of the upper portion of the stiffener defined between a height corresponding to 0.35 SH and the top of the stiffener is given by 0.5 mm.ltoreq.d.ltoreq.0.2 D where D is the thickness of the stiffener at the bottom portion adjacent to the bead core.

Abstract: A heavy duty radial tire having a belt layer assembly formed of at least four layers formed from steel cords. The belt layers may be divided into two groups: a group of outer layers which are disposed at an outer side in a radial direction of the tire, and a group of inner layers which are disposed at an inner side in the radial direction of the tire. Cross-sectional areas of the steel cords of at least one layer of the group of outer layers are greater than the cross sectional areas of the steel cords of the group of inner layers. The steel cords of at least one layer of the group of outer layers and the group of inner layers are provided such that ratios I/A of cross sectional secondary moments I and cross sectional areas A of the steel cords are greater than or equal to 4.5.times.10.sup.-3 mm.sup.2. Accordingly, a superior effect can be achieved in that cut resistance can be improved without deterioration in other properties of the tire.

Abstract: The tire of this invention has a belt package with a combination of a steel refinforced inner belt ply and an aromatic polyamide reinforced outer belt ply. The strength per unit width of the aromatic polyamide reinforced ply is made to be within 30 percent greater than the strength per unit width of the steel reinforced belt ply. The tire of this invention has angles of the aromatic polyamide reinforcing members from the mid-plane greater than the angles of the steel reinforcing members from the same mid-plane by 1 to 8 degrees. High impact endurance values are disclosed to be a function of the difference in bending stiffness values for each ply as well as a function of the composite shear stiffness values.

Abstract: A heavy duty radial tire has a belt comprising first, second and third plies disposed in this order from the carcass to the radially outside thereof, each belt ply being made of steel cords laid parallel with each other, the inclining direction of the cords with respect to the tire equator of the first ply being the same as that of the second ply, but reverse to the inclining direction of the third ply, the first belt ply cord angle being 35 to 80 degrees, the second belt ply cord angle being 15 to 30 degrees, and the third belt ply cord angle being 15 to 30 degrees, whereby the belt satisfies (A) the total of the second belt ply strength and the third belt ply strength is 3.4 to 10.0 times the first belt ply strength, and/or (B) the second belt ply strength is in the range of from 1.05 to 2.0 times the third belt ply strength, wherein the strength of each belt ply is defined as the total tensile strength of belt cords in a predetermined unit width of the belt ply.

Abstract: The radial pneumatic tire of this invention is suitable for use on passenger cars, light trucks, or the like. The belt package of this otherwise conventional tire has three belts which are preferably steel. The first belt is at an angle of 55 to 80 degrees, the second belt is at an angle of 18 to 28 degrees and the third belt is at an angle or -18 to -28 degrees with respect to the midcircumferential plane. The parallel reinforcing members of the first belt ply are spaced apart a distance at least equal to the parallel reinforcing members of the second belt ply. The parallel reinforcing members of the third belt ply are spaced a distance apart a distance less than those of the second belt ply. The strength per unit width in the circumferential direction of the first belt ply is less than the strength per unit width in the circumferential direction of the second belt ply. The strength per unit width of the third belt ply is greater than that for the second belt ply.

Abstract: A motorcycle radial tire comprises a tread reinforced between its edges by a breaker assembly and having in its normally inflated fitted condition a camber value C/L of between 0.5 and 0.7, a reinforcing carcass of radially disposed cords extending radially inside the breaker assembly and between two bead regions and wrapped in each bead region around an annular bead core from the axial inside to the outside to form carcass ply turn-ups, and tire sidewalls between the tread edges and bead regions, the tire characterized in that the breaker assembly comprises two breaker plies each reinforced with aromatic polyamide cords oppositely inclined with respect to the circumferential direction of the tire and a supplementary ply disposed radially adjacent to the breaker plies and reinforced with nylon reinforcements laid parallel to each other and disposed at an angle in the range of 75.degree.-90.degree. to the circumferential direction of the tire.

Abstract: A heavy duty pneumatic tire comprises a radial carcass, and a belt comprised of at least three belt layers, in which a first belt layer contains cords inclined at a large cord angle with respect to an equatorial plane of the tire and each of a second belt layer and a third belt layer contains cords inclined at a small cord angle with respect to the equatorial plane and cords of the second and third belt layers are crossed with each other. In the tire, the first belt layer is comprised of steel cords having a 1.times.N structure (N: 2-5) and/or each of the second and third belt layers is comprised of steel cords obtained by twisting 6 sheath steel filaments each having a filament diameter of not more than 0.30 mm around a single core filament at a twisting angle of not more than 6.degree..

Abstract: In a heavy duty pneumatic radial tire, when the belt is comprised of not less than three main belt layers, a belt layer other than a belt layer adjacent to a carcass is a narrow-width rigidity reinforcing layer, or when the belt is comprised of not less than four main belt layers, a belt layer adjacent to the carcass and a belt layer other than a belt layer adjacent to the belt layer are narrow-width rigidity reinforcing layers. Such a narrow-width rigidity reinforcing layer has given width and inclination cord angle.

Abstract: An improved pneumatic radial ply truck tire 10 having an aspect ratio below 0.70 is designed to replace two conventional truck tires on the trailer axle of semi-trailers. These tires 10 are commonly referred to as Super Single Tires. The improved tire 10 has a radially outer tread surface 30 which is defined by three radii of curvature R.sub.1, R.sub.2, and R.sub.3 on each side of the tread centerline C.sub.L. Radii R.sub.1 and R.sub.2 are internal to the tire 10 whereas radius R.sub.3 is external to the tire 10 and defines the outer surface 30C of the tread shoulder region. The combination of curvatures 30A, 30B and 30C yields a substantially rectangular contact patch greatly improving the treadwear rates of the tire 10. The tire 10 has the radius R.sub.2 in the range of 1.3 to 2 times the radius of curvature R.sub.1, the external radius R.sub.3 is in the range of 0.7 to 2.5 times the first radius of curvature R.sub.1, preferably in the range of 1.0 to 2.5 times R.sub.

Abstract: A pneumatic tire comprises: a carcass extending between bead portions of the tire; a belt reinforcement layer disposed radially outside the carcass and including at least one cord ply extending between tread edge portions to reinforce a substantially full width of the tread portion; and a cord layer disposed radially outside the belt reinforcement layer and having a width narrower than that of the belt reinforcement layer, wherein the cord layer is disposed beneath a rib defined between circumferentially extending grooves to reinforce the rib, or the cord layer is disposed asymmetrically with respect to the tire equator to provide a asymmetrical reinforcement for the tread.

Abstract: A heavy duty radial tire including a tread region reinforced by a breaker strip assembly comprising at least three breaker plies of fabric of parallel metallic cords in which the cords of the radially innermost first ply and those of the third ply are inclined at a relatively small angle with respect to the equatorial plane of the tire, wherein the cords of the second ply, disposed radially between the first and third plies, are the only cords inclined at an inclination angle with respect to the equatorial plane in the range of 40.degree. to 85.degree., and wherein the cords of the first and third plies are inclined in opposite directions to each other and have inclination angles with respect to the equatorial plane in the range of 5.degree. to 40.degree..

Abstract: A motorcycle radial tire comprises a tread reinforced between its edges by a breaker assembly and having in its normally inflated fitted condition a camber value C/L of between 0.5 and 0.7, a reinforcing carcass of radially disposed cords extending radially inside the breaker assembly and between two bead regions and wrapped in each bead region around an annular bead core from the axial inside to the outside to form carcass ply turn-ups, and tire sidewalls between the tread edges and bead regions, the tire characterized in that the breaker assembly comprises two breaker plies each reinforced with aromatic polyamide cords oppositely inclined with respect to the circumferential direction of the tire and a supplementary ply disposed radially adjacent to the breaker plies and reinforced with nylon reinforcements laid parallel to each other and disposed at an angle in the range of 75.degree.-90.degree. to the circumferential direction of the tire.

Abstract: A pneumatic radial tire comprising a pair of bead portions and sidewall portions and a tread portion connecting the sidewalls. At least one radial carcass layer reinforcing said portions is positioned between two beads embedded in the bead portions. A belt comprises at least two layers having cords crossing each other from one layer to the next, a cap circumferentially wound having organic fiber cords therein and reinforcing rubber layers in an entire region of the side wall portions supporting a load of the tire having a crescent shaped cross section along an inner side of the carcass. At least one tie-element layer resisting force generated in width directions of the tire and having many cords oriented substantially orthogonally with respect to an equatorial plane of the tire is arranged between the belt and the cap.

Abstract: A heavy duty pneumatic tire comprises a radial carcass, and a belt comprised of at least three belt layers, in which a first belt layer contains cords inclined at a large cord angle with respect to an equatorial plane of the tire and each of a second belt layer and a third belt layer contains cords inclined at a small cord angle with respect to the equatorial plane and cords of the second and third belt layers are crossed with each other. In the tire, the first belt layer is comprised of steel cords having a 1.times.N structure (N: 2-5) and/or each of the second and third belt layers is comprised of steel cords obtained by twisting 6 sheath steel filaments each having a filament diameter of not more than 0.30 mm around a single core filament at a twisting angle of not more than 6.degree..

Abstract: A pneumatic tire has a belt reinforcing structure comprising a folded belt ply and a spirally wound structure extending transversely between the folded edges of folded portions of the folded belt ply. No cut belts are used in the assembly. In an illustrated embodiment, both the folded belt ply and the spirally wound ply are reinforced with aramid cords. Also, a plurality of spirally wound plies can be used.

Abstract: A pneumatic radial tire for airplanes comprises a toroidal carcass of at least two carcass plies, a tread rubber superimposed on the carcass, and a belt disposed between the carcass and the tread rubber, in which the belt is comprised of a plurality of radially inner belt plies and a plurality of radially outer belt plies, and each of the radially inner belt plies contains cords extending substantially zigzag at a cord angle A of 5.degree.-15.degree. with respect to the equatorial plane in the circumferential direction while axially being bent at both side ends of the ply, and each of the outer belt plies contains cords having a cord angle B larger than the cord angle A. In this tire, the occurrences of standing wave and cut peel off are prevented with the reduction of tire weight.

Abstract: A pneumatic radial tire comprising a pair of bead portions and sidewall portions and a tread portion connecting the sidewalls. At least one radial carcass layer reinforcing said portions is positioned between two beads embedded in the bead portions. A belt comprises at least two layers having cords crossing each other from one layer to the next, a cap circumferentially wound having organic fiber cords therein and reinforcing rubber layers in an entire region of the side wall portions supporting a load of the tire having a crescent shaped cross section along an inner side of the carcass. At least one tie-element layer resisting force generated in width directions of the tire and having many cords oriented substantially orthogonally with respect to an equatorial plane of the tire is arranged between the belt and the cap.

Abstract: In order to improve the resistance of a crown reinforcement (20) of a radial tire to perforations, cuts and the drawbacks resulting therefrom, the crown reinforcement (20) is formed of three plies (21, 22, 23) of non-stretchable metal wires or cables. The resistances R.sub.1, R.sub.2, R.sub.3 of these plies being such that1.5.ltoreq.R.sub.1 /R.sub.2 .ltoreq.2.5and0.5.ltoreq.R.sub.3 /R.sub.2 .ltoreq.1.5,the two radially outer plies (22, 23) having wires or cables separated by a distance (e) equal to at least their diameter.

Abstract: A heavy duty pneumatic radial tire comprising a carcass, a tread and a belt layer consisting of four belt plies piled radially one above another and containing steel cords therein. The four belt plies consist of a large belt ply having a width wider than that of the other belt plies, a middle belt ply arranged radially inward of the large belt ply and having steel cords oblique in the same directions as those of steel cords of the large belt ply, a first small belt ply arranged between the large belt ply and the middle belt ply and having steel cords oblique in opposite directions to those of the cords of the large belt ply and a width smaller than that of the middle ply, a second small belt ply arranged radially inward of the middle belt ply and having steel cords oblique in opposite directions to those of the cords of the large belt ply and a width smaller than that of the middle belt ply.

Abstract: A pneumatic tire for a two-wheeled vehicle, which includes a carcass having opposite end portions turned up axially outwardly around a pair of bead cores spaced apart from each other in the direction of the tire-rotating axis, a tread and a pair of sidewalls reinforced by the carcass, and a belt consisting of at least one belt layer arranged between the tread and the carcass, said carcass consisting of at least one carcass ply of organic fiber cords arranged at a constant angle of 75.degree. to 90.degree. relative to the tire equatorial plane. At least one belt layer is made of organic fiber cords arranged substantially in parallel with the tire equatorial plane, and after vulcanization an average tension of the cords of said at least one belt layer at the central portion of the tread at an elongation upon the respective cords being more than 10% is higher than that of the cords of the belt layer at the side edge portion of the tread at substantially the same elongation upon the respective cords.

Abstract: A pneumatic tire for heavy duty use improved in shoulder wear resistance and wandering performance, in which a tread profile extending between tread edges (PT) is formed by an arc having an outwardly swelling curvature of a radius (TR), a buttress profile extending radially inwardly from a point (PB) on the surface of each tire sidewall is formed by an arc having an inward swelling curvature of a radius (BR), a connecting profile extending between each tread edge (PT) and said point (PB) is formed by an arc having an outwardly swelling curvature and intersecting the tread profile at the tread edge (PT) to form a angled corner and smoothly connected with the buttress profile at the point (PB), the ratio (t/m) of the radial distance (t) between the tread edge (PT) and the equatorial point (C) on the tread profile to the axial distance (m) therebetween is 0.09 to 0.

Abstract: A heavy duty radial tire, which comprises a belt comprising three plies of cords laid at an angle of from 5 to 70 degrees with respect to the tire equator, the widest belt ply defining a belt radius as measured from the tire axis to the radially inner surface thereof, the difference (RB1-RB2) of the belt radius (RB1) measured at a pair of axially inner points P from the belt radius (RB2) measured at a pair of axially outer points Q in an unloaded state being in the range of 0 to 0.05 times a half ground contacting width SL, each inner point P spaced apart from the tire equator toward each side thereof by a distance of 0.25 times the axial width (BWM) of the widest belt ply, each outer point Q located axially outward of each inner point P and spaced apart from the tire equator by a distance of 0.45 times the axial width (BWM) of the widest belt ply, whereby uneven tread wear between the tread crown and tread shoulder is reduced without deteriorating high-speed durability.

Abstract: A pneumatic radial tire formed so that, when the tire is inflated from a non-inflated state, in which the inner pressure thereof is 5% of a normal lever, to a normal inner pressure, a central region of the outer surface of the tread in a meridional cross section of the tire which is between two points P.sub.1, P.sub.1 ' spaced from the center P.sub.0 of a tread width to left and right along the outer surface of the tread by a distance L, which is expressed by the formula 0.25TW.ltoreq.L<0.50TW, with respect to a width TW of a ground contacting portion of the bread grows outward in the radial direction of the tire, shoulder regions on both outer sides of the two points P.sub.1, P.sub.1 ' contracting inward in the radial direction of the tire, with a radius of curvature R.sub.2 of a region, which is formed between two intermediate points P.sub.2, P.sub.2 ', which are positioned halfway respectively between the center P.sub.

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 high performance pneumatic radial tire includes a tread with plural circumferential grooves, a radial carcass, a belt composed of two belt layers of metal cords, one additional reinforcing layer arranged on a radially outer side of the belt and on an axially central area of the tread, and at least two additional auxiliary layers arranged on each of widthwise opposite side portions of the tread and composed of organic fiber cords. The additional reinforcing layer is composed of cords crossing the metal cords in the belt layer adjacent thereto and inclined with respect to the tire-circumferential direction, and has a width smaller than a minimum width of the belt but greater than a distance between the circumferential grooves located on widthwise outermost sides of the tread, respectively. The organic fiber cords composing at least two additional auxiliary layers extend substantially in the tire-circumferential direction, and at least two additional auxiliary layers have different widths.

Abstract: A pneumatic tire for a passenger car includes a toroidal carcass anchored by a pair of beads and a belt made of laminated strips. The strips have a number of reinforcing elements of cords or filaments surrounding a crown of the toroidal carcass and are coated with a high molecular weight material having a modulus of elasticity less than that of the reinforcing elements. The belt is of a laminated construction of a first layer and a second layer of a single strip. The first layer has wave-shaped reinforcing elements arranged side by side and directing in parallel with an equatorial plane of the tire, while the second layer has reinforcing elements arranged in parallel with each other at angles of 15.degree.-75.degree., preferably 35.degree.-60.degree. with respect to the equatorial plane.

Abstract: A radial tire for heavy duty vehicles having a steel belt layer with triangular structure which is composed of at least three belt plies of steel belt disposed on a carcass, and a middle layer which contains cords of aromatic polyamide fibers which is laid between first belt ply and second belt ply viewed from tread surface side among the belt plies.The middle layer has skirts which are folded over from a main portion of the middle layer and laid between the first and second belt plies so as to wrap around each axial outer end of the first belt ply.The cords of the first belt play and the cords of the second belt ply cross each other at an angle of from 10 to 30 deg. against the tire equator, and the cords of the middle layer slant in the same direction as that of first belt ply at an angle of 3 deg. or less against that of first belt ply.

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 (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: A strip-like reinforcing laminate is comprised of at least two laminated strips each containing wave-like or zigzag reinforcing elements covered with a particular polymer material, wherein each reinforcing element in each of these strips has interlaced portions crossly lying on at least two reinforcing elements included in the adjoining strip, and the reinforcing elements in all of these strips are aligned in the same direction. Further, such a strip-like reinforcing laminate is used as a reinforcement in various parts of a pneumatic tire.

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: 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 high speed radial ply tire, such as an aircraft tire, having a tread reinforcement comprising three groups of layers. The first, radially inner, group comprises two bias ply layers; the second group, wider than the first, being substantially parallel to the tire mid-circumferential plane and the third, radially outer group, narrower than the first, also being substantially parallel to the mid-circumferential plane of the tire. A fourth group of bias cut layers may be positioned between the second and third groups.

Abstract: A heavy duty and medium pneumatic radial tire having a belt layer composed of at least three layers between a carcass layer and a tread, wherein the first belt layer as numbered from the carcass layer towards the tread is separated into two parts at the central region of a crown and at least one organic fiber cord layer is disposed in a space formed by the separation of the first belt layer.

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 radial tire, which comprises a carcass of at least one ply of radially arranged cords turned up around bead cords from the inside to the outside thereof, and a breaker disposed radially outside the carcass, the breaker comprising at least two radially adjacent plies of cords, the breaker having at least a portion in which the cords of each of the two plies are inclined with respect to an equatorial plane of the tire and the cords of one ply are inclined oppositely to the cords of the other ply, the cords of each of the breaker plies being so arranged that the cord angle QC in a crown portion of the breaker with respect to the equatorial plane differs from the cord angle QS in each of the shoulder portions of the breaker with respect to the equatorial plane, wherein the crown portion is centered on a tire equator and has a width of 0.4 to 0.

Abstract: A pneumatic tire (10) having a tread (12), carcass (70), sidewalls (14), bead portions (18) and an annular reinforcing structure or belt structure (76). The tread (12) has two different types of circumferential grooves. Two circumferential straight grooves (20) divide the tire into three circumferentially extending portions (24,26,28). Each portion is further divided by a circumferentially extending zig-zag groove (22) or an "S" shaped groove. Each portion is then divided into blocks (30) by a plurality of axially extending grooves (32). The tread-reinforcing structure (76) has two belt plies (78,80) of steel cords (82), the cords of one are oriented at an angle A, with respect to the mid-circumferential centerplane (MC), while the cords of the other are oriented at an angle B, where angle B is less than angle A. The difference between angle A and angle B is greater than one degree and less than or equal to four degrees.

Abstract: A heavy-duty radial tire having a belt layer comprising at least four metallic cord layers of first, second, third, and fourth belts in that order from the carcass layer towards the tread. The first belt has a cord angle of 40.degree. to 75.degree. relative to the circumferential direction of the tire and is split into left and right portions provided on left and right shoulder portions, respectively, so as to provide a space in the central region of a crown portion provided with either at least one organic fiber cord layer having a total tensile strength per unit width of at least 240 kgf/cm and a cord angle of 0.degree. to 10.degree. or an inextensible fiber cord layer having a two-layer structure wherein the sum of the tensile moduli per unit width in the initial tension of all the cords is at least 1.3.times.10.sup.3 kgf/cm, the cord angle is larger than 0.degree. and two layers in the two-layer structure cross each other at an absolute angle smaller than the cord angle of the second and third belts.

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).