Abstract: The improved sidewall 12 has bands of adjacent fields of serrations. The fields each have similarly oriented ridges 20A, 20B, 20C, 20D, 20E or 20F adjacent fields have different cross sectional geometries creating a unique contrasting appearance. The relative difference in contrast if fundamentally the same regardless of the viewers perspective.

Abstract: A heavy duty radial tire comprises: a carcass ply turned up around a bead core in each bead portion from the inside to outside of the tire so as to form a pair of turnup portions and a main portion therebetween; a bead apex rubber disposed between each of the turnup portions and the main portion, each. of the turnup portions extending radially outwardly beyond a radially outer end of the bead apex to adjoin the main portion; a chafer rubber disposed along at least an axially outer surface of each of the bead portions so as to define at least a flange-contacting part for contacting with a flange of a wheel rim; the height of the radially outer end of the bead apex being in the range of from 7 to 35% of the height of the carcass at the tire equator and being less than the height of the radially outer end of the chafer rubber; and the flange-contacting part being devoid of a concave profile. When the carcass ply is made of steel cords whose sectional area is in the range of from 0.10 to 0.25 sq.

Abstract: A pneumatic tire includes a body, a belt package, and a tread package. The tire includes a layer of rubber disposed between the body and the tread package. The layer of rubber creates a thickness of between about 0.5 millimeters and about 1.5 millimeters between the cords in the body and the cords in the belt package. The layer of rubber is fabricated from a rubber having a stiffness greater than the rubber in the body of the tire. This configuration provides a tire having improved cornering coefficient, reduced vibrational levels, and less coarse road noise with only a small increase in rolling loss.

Abstract: In a pneumatic tire, a cord spacing between an axially outer cord layer and an axially inner cord layer such as: a turnup portion and a main portion of a carcass ply; or a bead reinforcing cord layer and a carcass ply turnup portion, is increased from the radially inside to the outside of the tire to improve the durability of the bead portion.

Abstract: The present invention provides a pneumatic safety tire comprising a pair of left and right bead cores, a carcass layer, a multi-layer belt portion, a tread portion, and a pair of side wall portions disposed at the left and right of said tread portion, wherein at least one sheet of a rubber-filament fiber composite formed from filament fibers and a rubber component is disposed at said side wall portions in a vicinity of said carcass layer. The safety tire of the present invention maintains the properties during ordinary use under the inflated condition at high levels, has a light weight, and shows remarkably improved properties during use under the run-flat condition.

Abstract: A high transverse-curvature tire for two-wheeled vehicles includes a carcass structure, a belt structure, and a tread. The carcass structure includes at least two superimposed plies provided with reinforcing cords. The belt structure includes radially-outer and radially-inner layers. The reinforcing cords of each ply are essentially parallel to other reinforcing cords of that ply and are oriented along directions inclined with respect to an equatorial plane of the tire. The reinforcing cords of at least two adjacent superimposed plies are oriented in opposite directions with respect to the equatorial plane of the tire. The carcass structure includes at least one first sheet, located between the at least two superimposed plies, made of an elastomeric material incorporating fibrous reinforcing fillers. The radially-inner layer includes at least one second sheet made of an elastomeric material incorporating fibrous reinforcing fillers.

Abstract: A passenger tire having a tread, a casing with two sidewalls, one or more radial plies extending from and wrapped about two annular beads and a belt reinforcement structure located radially between the tread and the piles. The tread has a central rib with a first contour-defining curve extending outwards from the mid centerline of the tire towards the sidewalls and a pair of side ribs each having a second contour-defining curve disposed between the central rib and the sidewalls. The first and second contour-defining curves each have first and second radii disposed such that the meeting point of first and second adjacent contour-defining curves cannot contain a single line that is mutually tangential to the first and second adjacent contour-defining curves.

Abstract: A pneumatic tire, in which a concave portion adjacent to a convex mark is provided on a surface of a sidewall portion, and a ratio of a volume v of the concave portion to a volume V of the convex mark is set as: 0.8V≦v≦1.2V, alternatively, a convex portion adjacent to a concave mark is provided on the surface of the sidewall portion, and a ratio of a volume w of the convex portion to a volume W of the concave mark is set as: 0.8W≦w≦1.2W, thus suppressing a bend of a carcass layer located under a mark spot of the sidewall portion, and making it possible to maintain a carcass line approximately uniformly on a circumference thereof.

Abstract: A pneumatic tire constituting part or all of the part members constituting the pneumatic tire by a rubber composition containing, based on a total 100 parts by weight of a rubber containing at least 70 parts by weight of an ethylenic unsaturated nitrile-conjugated diene-based highly saturated rubber having a content of conjugated diene units of not more than 30 percent by weight, 0 to 120 parts by weight of zinc methacrylate and 0 to 60 parts by weight of carbon black and having a total of formulations of zinc methacrylate and carbon black of 10 to 120 parts by weight, and providing, between the above part members and the adjoining diene-based rubber layer, a bonding rubber layer comprising of a rubber composition containing, based on a total 100 parts by weight of a predetermined diene-based rubber and acrylonitrile butadiene copolymer rubber, 5 to 80 parts by weight of a predetermined aromatic petroleum resin.

Abstract: An improved track belt tire is constructed of a removable tread belt assembly mounted to the outer circumferential surface of a multi-layered tire carcass with an embedded carcass ply having ply turnup ends about the bead wires. The outermost ends of the first and second turnup ends being located radially outward at a distance equal to between about 2 and 3 times the diameters of the bead wires so that the ends of the turnup ends are supported by the flange ends of the tire rim when a tire carcass mounted to the tire rim is deflected. The turnup ends are also supported by first, second, third, and fourth apex elements disposed about each of the bead wires. The ply line of the carcass ply can also follow the natural ply line.

Abstract: The object of the present invention is to provide a pneumatic tire having a sidewall rubber, which has improved weatherability and flexing fatigue resistance and is not discolored.

Abstract: A pneumatic radial tire wherein both end portions of at least one layer of a carcass layer are turned up around right and left bead cores from the inside to the outside of the tire, and at least two layers of belt layers formed by arranging reinforcing cords in such a fashion that their inclining directions with respect to a tire circumferential direction cross one another in mutually opposite directions between the layers are disposed on the outer circumferential side of the carcass layer of a tread portion. A carcass strength coefficient K defined by the formula (1) in the specification is 0.15 to 0.35 N/mm·kPa at portions on the tread portion center side of positions P which are away by 10% of a belt width of a belt layer having the second greatest width from both edges thereof towards its inside, and is 0.5 N/mm·kPa at portions from the positions P to the bead portions.

Abstract: A pneumatic tire comprises a tread portion, a pair of sidewall portions, a pair of bead portions, a carcass, a belt, and a bead filler rubber, wherein the bead filler rubber in an assembly of the tire and an approved rim has a height lower than the height of a rim flange, and a turnup portion of the carcass has a height not less than 0.5 times a section height of the carcass from a rim size line and extends over a maximum width position of the carcass and in parallel to a main body of the carcass outward from a taper end of the bead filler rubber, and a pair of sidewall reinforcing layers are arranged along an outside of the turnup portion to extend from near to the taper end of the bead filler rubber up to at least near to an end of the belt.

Abstract: A pneumatic tire comprises a tread portion, a pair of sidewall portions, a pair of bead portions, and at least one carcass ply toroidally extending between a pair of bead cores and wound around the bead core to form a turnup portion, in which a reinforcing rubber having substantially a crescent shape at its lateral section is disposed at an inside of the sidewall portion and a cord reinforcing layer containing cord(s) extending in a direction of approximately 90° with respect to a radial line segment is disposed in at least a bead portion.

Abstract: An improved track belt tire is constructed of a removable tread belt assembly mounted to a tire carcass with an embedded carcass ply having ply turnup ends about the bead wires. First, second, third, and fourth apex elements are disposed about each of the bead wires. The first of the apex elements is located adjacent and radially outward from each of the bead wires. The second of the apex elements is located between the overlying sides of the turnup ply. The third of the apex elements is disposed against the axially inwardly facing sides of the turnup ends of the carcass ply and the fourth of the apex elements is located against outwardly facing sides of the ply turnup ends of the carcass ply to encase the end portions of the ply turnup ends between the second and fourth apex elements.

Abstract: An improved track belt tire is constructed of a removable tread belt assembly mounted to the outer circumferential surface of a multi-layered tire carcass with an embedded carcass ply having ply turnup ends looped around and extending axially inwards from the bead wires. The outermost ends of the first and second turnup ends being located radially outward at a distance equal to between about 2 and 3 times the diameters of the bead wires so that the ends of the turnup ends are supported by the flange ends of the tire rim when a tire carcass mounted to the tire rim is deflected. The turnup ends are also supported by first, second, third, and fourth apex elements disposed about each of the bead wires. The ply line of the first carcass ply layer can also follow the natural ply line.

Abstract: A pneumatic radial tire wherein both end portions of at least one layer of a carcass layer are turned up around right and left bead cores from the inside to the outside of the tire, and at least two layers of belt layers formed by arranging reinforcing cords in such a fashion that their inclining directions with respect to a tire circumferential direction cross one another in mutually opposite directions between the layers are disposed on the outer circumferential side of the carcass layer of a tread portion. A carcass strength coefficient K defined by the formula (1) in the specification is 0.15 to 0.35 N/mm·kPa at portions on the tread portion center side of positions P which are away by 10% of a belt width of a belt layer having the second greatest width from both edges thereof towards its inside, and is 0.5 N/mm·kPa at portions from the positions P to the bead portions.

Abstract: A pneumatic radial tire having in axial cross-section a highly curved tread is reinforced by a breaker assembly with improved resistance to breaker edge looseness. The breaker assembly includes one breaker ply which extends between two bead regions and has its edges disposed between a carcass main portion and a carcass turn-up portion. An improved single-stage method may be employed for building the tire.

Abstract: A pneumatic radial tire for passenger car comprises a radial carcass comprised of at least one rubberized carcass ply containing organic fiber cords therein, and a belt comprised of plural belt layers, wherein at least one carcass ply has a cut-out zone in its crown portion and a carcass supporting layer is arranged adjacent to the cut-out zone.

Abstract: A heavy duty pneumatic radial tire has a light weight of a bead portion and an excellent bead portion durability and is provided with a bead portion reinforcing layer covering an outer surface of a carcass ply around a bead core, in which the bead portion reinforcing layer is comprised of a single rubberized steel cord layer or of two or three independent rubberized steel cord layer segments. In this case, the steel cords arranged in the bead portion reinforcing layer have an inclination angle of a given range with respect to a circumferential line of the tire.

Abstract: A pneumatic radial tire having carcass layers of three plies each constituted by organic fiber cords and in which both end portions of a first one and a second one of the carcass layers enumerated from an inner side to an outer side direction of the tire in the 3 plies of carcass layers, are folded back from the inner side to the outer side of the tire respectively around bead cores, reinforcement layers are arranged on outer sides of the fold back portions of the carcass layers and a third one of the carcass layers is turned down to cover outer sides of the reinforcement layers.

Abstract: A run-flat tire, i.e., a tire capable of running for a while even when it is flat or uninflated due to a puncture, includes a carcass ply or layer having a turned-up end which reaches one end of a belt layer underlying the tire tread. A crescent-shaped side-reinforcing rubber pad includes a outer-surface-side rubber pad and an inner-surface-side rubber pad arranged which sandwich a fibrous layer therebetween. The inner-surface-side pad, i.e., the one situated inward of the outer-surface-side pad, is thicker than the outer-surface-side pad. The upper end (the end close to the tread) and the lower end (the end close to a bead portion) of the fibrous layer extend slightly beyond the upper and lower ends of the side-reinforcing rubber pad, respectively.

Abstract: A pneumatic tire comprises a tread-sidewall reinforcement extending between the tire sidewall portions through the tread portion which has a symmetrical cord arrangement to prevent ply steer. The tread-sidewall reinforcement is made of a series of loops of at least one reinforcing cord which loops spread over the circumference of the tire. The tread-sidewall reinforcement can be formed as a carcass or a reinforcing layer disposed outside a carcass. When viewed in the radial direction, the inclination angle of the reinforcing cord with respect to the tire circumferential direction is substantially 90 degrees at the tire equator and decreases to substantially 0 degree gradually from the tire equator towards the bead portions. When viewed in the axial direction, the inclination angle of the reinforcing cord with respect to the radial direction is in the range of from 60 to 90 degrees.

Abstract: A pneumatic tire for passenger cars comprises bead cores, a carcass layer, a tread portion, and side wall portions, wherein a rubber reinforcing layer having a crescent-shaped cross-section and at least one sheet of a rubber-filament fiber composite having a thickness measured under a pressure of 20 g/cm2 of 0.05 to 2.0 mm which is formed from a rubber component and filaments having a diameter or a maximum cross-sectional dimension of 0.0001 to 0.1 mm and a length of 8 mm or more are disposed in said side wall portions. Reinforcing cords of carcass plies are made of an aliphatic polyamide fiber having a melting point of 250° C. or higher.

Abstract: A pneumatic tire has a sidewall rubber insert axially inward of at least one carcass ply. Such insert may, for example, be an apex extending radially outward from the bead core region of the tire into the tire sidewall. Alternatively, it may be positioned higher in the sidewall portion of the tire and away from the bead core. Such insert is a rubber composition containing a dispersion of an ultra high molecular weight polyethylene and a dispersion of a starch composite.

Abstract: A tire 10 has a composite ply 40. The composite ply 40 has a primary ply 40A reinforced with parallel inextensible cords 41 and a pair of ply extensions 40B having synthetic cords. The method of manufacturing the tire 10 is described. The tire 10 can be made as a runflat type tire.

Abstract: A pneumatic tire comprises a carcass of at least one rubberized ply of a radial arrangement, a belt comprised of two or more cross cord layers, a pair of thick reinforcing strip rubbers located at an inner face side of the carcass and a bead filler rubber, in which the reinforcing strip rubber and bead filler rubber have specified JIS hardness and rebound resilience, hardness ratio and maximum gauge ratio.

Abstract: A pneumatic tire (10) has a pair of sidewall portions (20), a pair of bead regions (22) and a carcass (30) reinforced with at least two sidewall fillers or inserts (42), (46) for each sidewall portion and at least one cord reinforced ply (38) and two bead cores (26) one in each bead region and a reinforcing belt structure (36). This tire is preferably a runflat radial ply tire. The at least one cord reinforced ply (38) has a pair of turnup ends (32) wrapped around the pair of bead cores (26). The turnup ends (32) each extend radially outwardly to a terminal end (33) at a radial height of at least 40% of the tire section height (SH). The first insert for each sidewall portion lies radially inward and adjacent the at least one ply (38). The second insert (46) for each sidewall portion is a bead filler insert radially above the bead core (26) and between the at least one ply (38) and its turnup end (32).

Abstract: A pneumatic tubeless tire comprising a carcass ply of reinforcing cords extending between two tire bead regions through sidewall regions and a tread region and an innerliner disposed radially inwardly of the carcass ply is herein described. Between the sidewall region and the tread region is a tire shoulder region. In each of these shoulder regions, there is a circumferentially extending ply support strip disposed radially between the carcass ply and the innerliner. The ply support strip comprises a rubber compound containing short discontinuous fibrillated aramid fibers in an amount of between 7 and 15 parts by weight per 100 parts by weight of rubber.

Abstract: In a pneumatic tire for run-flat running comprising a stiffener rubber, viewing a cross-section of the tire-rim assembly inflated under an air pressure corresponding to 15% of a maximum air pressure of the tire, a top of the stiffener rubber is located inward from a specified line segment PA in a radial direction of the tire.

Abstract: A pneumatic radial tire capable of effectively controlling the occurrence of wandering phenomenon when being used in vehicles such as passenger car, small-size truck, truck, bus and the like is provided, in which a second tread zone contacting with a mountain side of a slant road surface is arranged so as to project toward a side of a first tread zone contacting with a flat road surface and camber thrust of the radial tire is increased by the second tread zone during the running on ruts and the like under loading.

Abstract: A pneumatic tire and a method of manufacturing the tire are disclosed, wherein the tire comprises a carcass ply turned up around a bead core in each bead portion, and a rubber bead filler disposed between the turnup portion and main portion of the carcass ply and extending radially outwardly from the bead core beyond the maximum section width point of the tire, the bead filler comprising a radially inner part preferably made of a bead apex rubber tapering radially outwardly from the bead core and a radially outer part preferably made of a strip of hard rubber having a substantially constant thickness and a JIS-A hardness of 75 to 95 degrees, the radially outer end of the bead apex rubber being lower than the radially outer end of a flange of a standard rim.

Abstract: A pneumatic vehicle tire has a carcass with at least one radial ply and beads having bead cores, whereby the carcass is anchored to the bead cores. A multi-ply belt is positioned radially outwardly on the carcass, and a tread is positioned radially outwardly on the belt. Sidewalls extend between the tread and the beads. The sidewalls have a first portion extending from the beads outwardly at an angle of 0% to 20% relative to the axial direction of the tire. The sidewalls have increased stiffness within the area of 50% to 90% of a tire height measured in a direction from the bead to the tread. The area of 50% to 90% prevents the sidewalls from touching the road surface when the tire is deflated and compressed.

Abstract: A runflat radial ply passenger or light truck pneumatic tire 10 has a carcass 30 reinforced with at least one sidewall insert or filler 42 and one substantially inextensible cord reinforced ply 38, the ply being wrapped about two bead cores 26 and located radially inward of a belt reinforcing structure 36. The sidewall insert or filler 42 is located radially inward of the ply 38. The cord 43 has a minimum modulus E of 10 Gpa and is generally inextensible and less heat sensitive than conventional synthetic cords used in passenger and light truck tires.

Abstract: A pneumatic tire, more particularly a run flat tire, comprises at least three radial carcass plies each extending between bead portions through a tread portion and sidewall portions, the tread portion is provided between the radially outermost carcass ply and radially inner next carcass ply with a crown reinforcing rubber layer so that at least two carcass plies are disposed radially inside the crown reinforcing rubber layer, and each of the sidewall portions is provided between the axially innermost carcass ply and axially outer next carcass ply with a side reinforcing rubber layer so that at least two carcass plies are disposed axially outside the side reinforcing rubber layer. The reinforcing rubber layers are preferably made of a low heat generation rubber having a complex elastic modulus of 8 to 15 Mpa, and a loss tangent of 0.03 to 0.08. The complex elastic modulus of the side reinforcing rubber layer is preferably less than that of the crown reinforcing rubber layer.

Abstract: A pneumatic radial tire has a carcass extending around the tire from bead-to-bead, sidewalls and a rubber tread region which has a profile, when considered in transverse cross section, of a new tire terminating at the sides of the tread in inner and outer shoulder regions, respectively, each shoulder region having a shoulder drop, which is the distance, in the radially inward direction, from the point of maximum tire diameter to a point of the shoulder at the edge of the shoulder region, such that when the tire is mounted on a scheduled wheel rim and inflated to a scheduled pressure, the tread region is asymmetric, having its point of maximum tire diameter offset in the axial direction of the tire from the center line of the tire section in the direction of the inner shoulder, and the shoulder drop of the outer shoulder is greater than the shoulder drop of the inner shoulder such that the tread region has an asymmetric profile, wherein the tread region has a substantially constant tread gauge or thickness exc

Abstract: At least one reinforcing rubber layer is provided in the part of each of two side wall portions which is on the outer side of a carcass layer. The outer circumferential end portions of the reinforcing rubber layers extend to positions in which they are disposed between the end portions of the innermost belt layer and the corresponding portions of the carcass layer, while the inner circumferential end portions of these rubber layers extend inward in the radial direction of the tire so as to overlap the bead fillers in positions on the outer sides of the end portions of the carcass layer in the widthwise direction of the tire. A 100% modulus at 100.degree. C. of the rubber constituting the reinforcing rubber layers is not higher than that of the rubber of the belt layers, and a dynamic elastic modulus at 20.degree. C. of the former rubber in the range of 10-40 MPa.

Abstract: A pneumatic radial tire comprising a tread portion, a pair of sidewall portions, a pair of bead portions each with a bead core therein, a carcass extending between the bead portions, a belt disposed radially outside the carcass and having a pair of edges, a rubber bead apex disposed in each bead portion and extending radially outwardly from the bead core, portions of the carcass one between each edge of the belt and the maximum tire width position are each provided therein with a rubber spacer disposed between axially adjacent carcass cords so that the cord spacing between the axially adjacent cords is in the range of from 0.55 to 5.5 times the diameter of the cords, whereby steering performance is improved without increasing the tire weight.

Abstract: The invention relates to a run-flat low inflation pressure all terrain vehicle (ATV) tire 10,11, wherein the tire 10,11 has at least one pair of elastomeric inserts 42,46, one insert 42,46 extending radially inward from each tread edge 14,16 toward a bead core 26. The radially inner end of the insert is radially inward of an elastomeric apex 48 located above the respective bead cores 26. The bead cores 26 have a wide substantially flat radially inner base which when the tire 10,11 is mounted on a conventional ATV design rim enable the tire 10,11 to remain seated onto the rim even when operating without any inflation. The preferred tire 10,11 has a unique tread 12. The central portion 13 of the tread 12 has circumferential rows of blocks or lugs 94. The lugs of laterally adjacent rows in a central region 13 of the tread 12 are connected by tie bars 93 which when employed on these run-flat tires keeps the tread lugs 94 in ground contact even when the tire is operated uninflated.

Abstract: A runflat radial ply pneumatic tire 10 has a carcass 30 which has a pair of sidewalls 20, each sidewall being reinforced with at least two sidewall fillers or runflat inserts 42, 46 and at least two cord reinforced plies 38, 40 and a bead core 26. The tire has one or more reinforcing belts 36. Each sidewall has at least one ply 38 or 40 reinforced with cords, the cords have a modulus E of X, X being at least 10 GPa. At least one ply has a turnup end 32 wrapped around the bead core 26. A second ply 38 or 40 is reinforced with substantially inextensible cords having a modulus E greater than X of the cords of the other ply. The second ply 38 or 40 is spaced from the first ply 38 or 40 by the second filler or runflat insert in the sidewall 20.

Abstract: A pneumatic tire 10 has a pair of sidewall portions 20, a pair of bead regions 22 and a carcass 30 reinforced with at least two sidewall fillers or inserts 42, 46 for each sidewall portion and at least one cord reinforced ply 38 and two bead cores 26 one in each bead region and a reinforcing belt structure 36. This tire is preferably a runflat radial ply tire. The at least one cord reinforced ply 38 has a pair of turnup ends 32 wrapped around the pair of bead cores 26. The turnup ends 32 each extend radially outwardly to a terminal end 33 located under the reinforcing belt structure 36. The first insert 42 for each sidewall portion lies radially inward and adjacent the at least one ply 38. The second insert 46 for each sidewall portion is radially between the at least one ply 38 and its turnup end 32.

Abstract: A rolling assembly is formed of a tire P with radial carcass reinforcement (1), the equilibrium curve of the thickness center line of which is tangent to the bead cores (2), and of a rim J comprising, axially to the outside of each seat (20) a flange R formed of a frustoconical portion (23) having a generatrix forming an angle of between 20.degree. and 60.degree. with a direction parallel to the axis of rotation, which is connected axially to the inside to the rim seat by an S-shaped portion and which is extended axially towards the outside by a cylindrical portion (25), in its turn extended by the curved end (26), the rim J having an axial width A equal to at most 0.65 times the maximum axial width S of the tire mounted on its rim and inflated to its pressure of use.

Abstract: A pneumatic radial tire comprising a tread portion, a pair of sidewall portions, a pair of bead portions each with a bead core therein, a carcass extending between the bead portions, a belt disposed radially outside the carcass and having a pair of edges, a rubber bead apex disposed in each bead portion and extending radially outwardly from the bead core, portions of the carcass one between each edge of the belt and the maximum tire width position are each provided therein with a rubber spacer disposed between axially adjacent carcass cords so that the cord spacing between the axially adjacent cords is in the range of from 0.55 to 5.5 times the diameter of the cords, whereby steering performance is improved without increasing the tire weight.

Abstract: The run-flat tire of this invention includes a pair of bead regions, a crown region with a tread and a tread reinforcing package including a cap ply and self supporting sidewalls between each bead region and the crown region. An innerliner ply maintains air within the inflated tire. The self supporting sidewalls each include a first crescent-shaped reinforcing member, an inner carcass layer, an inner sidewall supporting complex and an outer sidewall and bead protecting complex. The supporting sidewalls effectively have a plurality of crescent-shaped reinforcing members and a plurality of carcass layers. The sidewall supporting complexes are realized by providing first and second partial carcass layers along with a filler rubber portion and a second crescent-shaped reinforcing member, which can be formed by a separate tire building operation. The sidewall protecting complexes can be formed in a similar operation.

Abstract: A pneumatic motorcycle tire provided with a spiral belt and a pair of axially spaced reinforcing layers radially inside of the belt to improve the cornering stability and straight running stability of a motorcycle.

Abstract: A tire includes incisions in a ply of parallel cords of the tire, made pr to the ply's utilization for making the tire. A cutting device for making the incisions is comprised of a reference holder to impose a known orientation to the parallel cords. It is comprised of a blade of a given width C, the blade being positioned transversely relative to the known orientation, the device including an assembly for causing the cutting of the cords by the blade, and including an assembly for moving the blade transversely relative to the holder, and an assembly for moving the ply longitudinally relative to the holder.

Abstract: A pneumatic radial tire or run flat tire comprises a pair of bead cores, a radial carcass of a rubberized cord ply, a belt comprised of rubberized belt layers, a tread disposed outside the belt in the radial direction, and a side portion reinforcing layer extending along an inner surface of the carcass over a full region of each side portion and having a crescent shape at a radial section thereof, in which when a periphery length of the side portion reinforcing layer is divided into three equal parts along an inner surface of the tire, a thickness of the side portion reinforcing layer at a section in a radial direction of the tire is thickest in the vicinity of the 1/3 point located outward in the radial direction.

Abstract: A pneumatic passenger tire has an aspect ratio of greater than 50%, having bead portions with a height of not less than 30% of the tire section height, but no greater than the height of the maximum section width of the tire, and a pair of crescent-shaped sidewall inserts on either side of the belt package, disposed axially inward of the carcass structure, wherein the sidewall insert has a first inner end located at a position between 15% and 45% of height H of the bead portions, and a second outer end which extends to an axial position of not less than 40% of a half width of the outermost belt, as measured from the lateral edge of the belt toward an equatorial plane EP of the tire. The tire construction has sidewall insert is comprised of a sulfur-vulcanizable rubber compound having high compressive flex fatigue, high modulus and low hysterisis subsequent to vulcanization.

Abstract: A motorcycle 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 to 0.7, a reinforcing carcass ply of rubber covered cords radially inside the breaker assembly and extending between two bead regions and wrapped in each bead region around an annular bead core to form carcass ply turn-ups, and tire sidewalls between the tread edges and bead regions, wherein under the tread is disposed radially inward of the breaker assembly a secondary carcass ply of rubber covered cords and between the carcass ply and the secondary carcass ply is disposed a rubber member extending from tread edge to tread edge.

Abstract: A pneumatic tire for a two-wheeled vehicle has a hard rubber layer having a Shore A hardness of 60.degree. to 90.degree. arranged along the outside of the turn-up portion of a carcass, wherein a ratio (a/H) is within the range of 0.1 to 0.7 in which (a) is the height of the outer end in the tire radial direction of the hard rubber layer measured from the height of a flange of a rim on which the tire is assembled, and (H) is the height of the tread edge of the tread portion measured from the same, and wherein the inner end in the tire radial direction of the hard rubber layer is located inward of the flange height of the rim.