Abstract: A method for retreading and partially replacing the belt of a pneumatic vehicle tire, possibly accompanied by the interposition of binder layers and the use of coatings. First the replacement belt ply or plies, and then the finish-vulcanized profiled tread strip, are placed upon the tire body. A pressure treatment, possibly at an elevated temperature, is then effected. In order, along with a relatively short vulcanizing or processing time in the vulcanizing apparatus, to be able to dispense with the use of steel bandages or sleeves, the replacement belt ply or plies are vulcanized prior to placing these plies on the tire body.

Abstract: The present invention is drawn to an improvement in a joining device for joining ends of cord reinforced belt-shaped materials, in which elastic belt-shaped material having a large number of cords embedded therein at equal intervals with a predetermined inclination is cut in the direction of the cords into a length somewhat shorter than an outer circumferential length of a drum to be fed with the belt-shaped material, the cut length being wrapped around the outer circumference of the drum, and the opposite cut end planar surfaces of the material being drawn towards each other and butt-joined by a splicer. The improvement resides in a splicer having a lateral movement device that is movable in a direction parallel to a shaft of the drum, a press device supported by the lateral movement device, and a splice roller pivotably supported at the bottom end of the press device.

Abstract: The present invention relates to a structure and a manufacturing method of a pneumatic radial tire, especially a radial tire for aircraft, and it is hence a primary object of the present invention to improve the structural durability of a tire in high speed running. The pneumatic radial tire comprises a belt layer (4) composed of a center belt (BC) and two shoulder belts (BS), wherein a cord or cords (6) of each shoulder belt is substantially parallel to the central circumferential line of the tire, and the diameter (D3) of the shoulder belt on the center side is longer than the diameter (D2) on the shoulder side, and the shoulder belt is formed by using a belt drum having taper portions.

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: The process for the butt connecting of the edges of a rubberized fabric wh is formed of reinforcement elements which are parallel to each other and spaced apart by a pitch p by injecting under pressure and heat between the reinforcement elements of the edges spaced apart by an amount d greater than 1.5 p, a rubber mix having properties of coherence and stretching in raw state which are greater than the same properties of the coating mix of the reinforcement elements. In the tire produced from such a fabric, the welding mix has a modulus of elasticity in tension which is greater than said modulus of the coating mix of the reinforcement elements of the radial carcass reinforcement.

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 safety tube assembly for a pneumatic tire, the assembly including a plurality of balloons being contiguously disposed on the underside of a tread portion of the tire and an annular primary tube accommodated within the circumference of the balloons whereby each of the small balloons becomes an independent chamber interposed between the primary tube and the underside of the tread portion. Another feature of the invention is the provision of a puncture-resistant band surrounding the small balloons for dual protection against puncture of the pneumatic tire.

Abstract: A method and device for securing the ends of a single reinforcement cord to the unvulcanized core (7) of a tire utilizing two jaws (10, 11) which clamp the cords arranged at the starting end (41, 42) and terminating end (43, 44) of the reinforcement. A cutting blade (13) cuts the cord which then, without loosening the jaws, are pressed against the core (7) in order to immobilize the cord (4) due to the layer of raw rubber with which the core (7) has been previously covered.

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 pneumatic tire has a pair of axially-spaced annular tensile members forming a part of each bead. One or more continuous carcass plies extend between the annular tensile members and have lateral edge portions which are folded axially and radially outwardly around one of the annular tensile members. An air-impermeable liner is disposed axially and radially inwardly of the carcass plies. A layer of air-permeable rubber extends from a point axially inward and radially outward of one of the annular tensile members and is folded axially and radially outwardly around one of the annular tensile members such that the layer of air-permeable rubber abuts a rim flange when the tire is mounted. An air-impermeable gum strip is interposed between the layer of air-permeable rubber and the carcass plies such that the gum strip extends from a point radially outward and axially inward of one of the annular tensile members to a point radially beneath such annular tensile member.

Abstract: A tire having a bar code provided in a side portion thereof, with the bar code having an uneven bar portion extending to both side edges of the bar code and substantially no difference in level between the surface of the side portion of the tire and peaks of the uneven bars in the uneven bar portion.

Abstract: The invention relates to a run-flat tire and rim assembly for all-terrain vehicles (ATV), wherein the rubber thickness of the tire sidewall is at leat 10 times the diameter of the ply cords of a carcass; the height of the radially outermost end of a tire bead apex from the tire bead base is within a range of 20 to 40% of the section height of the tire; each tire bead has a toe with a protrusion protruded radially inwardly from the bead base and a hump groove axially outward of the protrusion; the bead toe comprises a toe strip having a JIS A hardness of 65 to 95; and the rim is provided with a well in the center portion, a pair of bead seats one on each side of the well, a pair of humps one formed axially inward and adjacent to each bead seat to be engaged with the hump grooves of the tire beads and a pair of grooves one formed axially inward of each hump to receive the protrusions of the tire bead toes.

Abstract: Electrode assemblies are provided such that a wire coil conductor is springingly secured into a tubular electrode or onto a pin without having to crimp, stake, weld, swage, or otherwise mechanically secure the wire coil electrode to the tubular electrode or pin. A simple assembly having high separation forces is provided by utilizing a wire coil electrode that, when untensioned, is either oversized with respect to the tubular electrode or is undersized with respect to the pin. Either the oversized wire coil electrode is rotated into the tubular electrode while reducing its oversized condition and placing same into a tensioned condition in order to secure it within the tubular electrode, or the undersized wire coil is rotated onto the pin in order to increase its undersized condition and simultaneously impart a tensioned condition thereto in order to springingly engage the wire coil electrode onto the pin.

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 includes a carcass layer consisting of at least one carcass ply having cords embedded therein and extending substantially in radial directions, a tread arranged radially outwardly of the carcass layer, and a belt layer consisting of at least tow layers of belt plies having cords embedded therein intersecting with each other at angles within 10.degree.-40.degree.. The tire comprises a reinforcing layer arranged between the carcass layer and the belt ply arranged radially outermost and consisting of at most two layers of reinforcing plies having cords embedded therein substantially in parallel with an equatorial plane. Both outer ends of the reinforcing layer are positioned inwardly, in width directions, of locations spaced apart one fifth of a tread width of the tire from shoulder ends. Outer ends of at least one reinforcing ply are positioned inwardly, in the width directions, of outermost ends of main grooves in the tread between center ribs and side ribs.

Abstract: A low-section pneumatic radial tire having an aspect ratio of not more than 0.85 and excellent resistance to uneven wear and belt end separation comprises at least one carcass ply of radial construction, a tread and a belt of at least two belt plies. In this tire, the reinforcing layer composed of two or less reinforcing plies is arranged between an outermost belt ply in the radial direction and the carcass, and at least one reinforcing ply of the reinforcing layer is comprised of first and second reinforcing ply segments arranged at both sides with respect to the equator so that the ply segment is located between an outer point separated from a shoulder end at a distance corresponding to 1/7 of tread width and an inner point separated from the equator of the tire at a distance corresponding to 1/10 of tread width.

Abstract: A heavy duty pneumatic radial tire includes a toroidal carcass consisting of plies having cords arranged in parallel with each other, and a plurality of belt layers interposed between the carcass and a tread of the tire. At least one of the plies has turn-up portions folded about a pair of bead cores from inside to outside of the tire. The tire comprises a crown protective layer arranged between the belt layers and the tread. The crown protective layer comprises wave-form cords or wave-form filaments. The tire further comprises a cushion rubber layer arranged radially inward of the protective layer and made of a rubber having a modulus less than 70 kg/cm.sup.2 under 100% elongated condition. A distance between cords of a radially outermost layer of the belt layers and the wave-form cords or the wave-form filaments of the radially innermost layer of the crown protective layer is more than 1.5 mm.

Abstract: A first magnetic material film is deposited on a support, a groove is etched in the first magnetic film which is shaped like a figure eight, a double coil is formed and is wound respectively around the two central pole pieces. An insulating material layer is deposited and etched in step form, the step having a side facing the central channel. An .[.magnetic.]. .Iadd.amagnetic .Iaddend.film is deposited on the thus etched step, and the film is etched so as to only leave a wall perpendicular to the plane of the films. This is followed by the deposition of a magnetic film and then a protective layer, the assembly being divided off so as to expose two pole pieces separated by an .[.air gap.]. .Iadd.amagnetic gap.Iaddend..