Abstract: A tire tread for a truck tire, especially of radial ply construction and designed for use on well-made roads, comprising a small number of zig-zag grooves. The sidewalls of each groove are each provided with a supporting buttress of varying height or width such that the maximum support is provided at or adjacent the points where the groove projects into the surrounding tread rubber. The provision of such a buttress provides a varying degree of support for each groove sidewall along the length of the groove and assists in preventing uneven wear of the tread rubber and reduces damage caused by stones trapped in the groove.

Abstract: An annular reinforcing structure for vehicle tires of a radial carcass has at least two radially superimposed layers of metal cords having an elongation at break between 2.6% and 3.2%. Two reinforcing rings are disposed in a radially external position at the extremities of the layers of metal cords with the axially outer edges coinciding with each other. The rings have a width between 7% and 40% of the width of the radially inner layers, and comprise metal cords having an elongation at break between 4% and 8%. The metal cords are oriented according to the longitudinal direction of the tire and are disposed in at least two radially superimposed strips.

Abstract: A heavy load pneumatic radial tire which has excellent wear resistance against heavy loads is herein disclosed. The radial tire has a tread portion which comprises long and short blocks for forming grooves which allow platforms to be disposed therein. Each of the platforms has predetermined height and length so that the total area of the grooves is decreased as the tread portion of the tire is worn.

Abstract: A process and chemical composition for laminating a photograph or lithograph onto canvas are disclosed whereby the resulting product appears similar to an oil painting, as well as providing improved depth. The process involves stripping a photograph or lithograph from a substantial portion of its backing, followed by application of the chemical composition to the photograph. The chemical composition includes a surfactant and an optical brightener such as a fluorescent whitening agent, and can include a sensitizer and stabilizer. The treated photograph or lithograph is then bonded to a textured backing at elevated temperature and pressure.

Abstract: Apparatus for manufacturing tire breaker fabric comprising a cord feed unit, guide means for guiding a single cord between two sets of retaining means attached one to either edge of an endless belt to form an elongate sheet of parallel closely spaced cords laid in zig-zag fashion such that the edges of the sheet are formed by a series of folded cord edges which are held by the retaining means. Stepwise drive means advances the belt and cord assembly to elastomer applying means for applying elastomer to one surface of the cord assembly.

Abstract: A machine for applying a layer of cement along the outer circumference of a tire for the purposes of retreading the tire, the machine comprises an air blower for removing dust adhered to the tire after the buffing process, a tire cart carrier which automatically raises the tire into spraying position and a spray head which applies a layer of cement on the outer circumference of the tire as the tire is rotated upon the tire cart carrier. The cement spraying machine is enclosed within a vent hood which is associated with a blower to vent all fumes from the spraying area. The tire cart carrier comprises a rotating support structure for contacting the upper bead of the tire and a weighted centering beam which contacts the lower bead of the tire as the tire cart carrier is raised into spraying position. The centering beam centers the rotating tire on the rotating support structure during spraying.

Abstract: A pneumatic tire for motor vehicles having a low power absorption and a high directional control stability is disclosed. The tire has a tread formed by two superimposed elastomeric layers and has a H/L ratio of less than 0.6; H is the sidewall height and L is the width of the tire section.

Abstract: Apparatus for and method of manufacturing tire breaker fabric comprising an elongated sheet of parallel closely spaced cords formed from a single cord laid in zig-zag fashion such that the edges of the sheet are formed by a series of folded cord edges. The apparatus comprises a cord laying head for laying a single cord in zig-zag fashion between a pair of spaced-apart edge forming units each comprising a holding pin engageable with a folded cord edge and a pincher head engageable around the pin to crimp the folded cord edge. A collector and holding unit collects the zig-zag cord assembly so formed and is operable to feed each traverse of cord in sequence to a device for applying elastomer to the cord assembly.

Abstract: An apparatus and method of manufacture for making tire breaker cord fabric comprising a tire cord laying head to lay a zig-zag assembly of a single cord, edge loop holding units and drive means for relatively moving the cord assembly to an elastomeric material coating device.

Abstract: An apparatus for molding a tire with an annular reinforcement below the tread surface includes a first set of molding segments for molding a tire, a winding mechanism for winding a flexible reinforcement band or thread about the molded tire under tension and a second group of molding segments for molding a tread surface portion about the reinforced tire body.

Abstract: A composite material of rubber and metal cords embedded therein is disclosed. The metal cord is produced by twisting at least three metal filaments, and has an elongation under a load of 5.0 kg/cord (P.sub.1) of 0.2-1.2% and an elongation under a load of 2.0 kg/cord (P.sub.2, %) of P.sub.2 .ltoreq.0.947P.sub.1 -0.043 prior to the embedding in rubber.

Abstract: A continuous strip of puncture sealing material is applied to an inside surface of a tire by laying and adhering a plurality of side-by-side turns of the strip with the different turns connected by angular crossing portions in the area of a first circumferential position of the tire. The first crossing portion overlaps a first end of the first turn. The other end of the strip is tapered and overlaps the last crossing portion and a portion of the last turn of the strip. The first circumferential position of the tire may be at a light spot circumferentially of the tire for improved balance of the tire. By overlapping the edge of the strip and pressing the material against the tire surface, the resulting puncture sealing layer is continuous and completely covers the surface of the tire under the crown portion for protection against punctures due to nails and other sharp objects.

Abstract: Apparatus for gripping a tire bead, moving the tire vertically and axially over an extruder nozzle die to a position within the tire chamber where a continuous extruded strip is applied to an inside surface of the tire as the tire is rotated. The extruded strip may be applied in a plurality of side-by-side turns connected by angular portions provided by axial indexing of the tire in a predetermined amount for a predetermined time. Means are also provided for spreading the tire beads and pressing the strip against the tire surface without interfering with the movement of the tire over and around the extruder nozzle die.

Abstract: Tire breaker fabric for a pneumatic tire comprising a sheet of tire cords wherein the cords comprise a twisted package of high modulus material filaments having a twist angle of not more than 18.degree. and the cords are formed by one single continuous cord which extends back and forth across the sheet in a zig-zag formation. The cords are preferably closely spaced and held in the sheet by a thin sheet of elastomeric material. The invention provides in addition a tire including breaker fabric of this type.

Abstract: A heavy-duty radial tire has a tread with a plurality of parallel ribs separated and defined by a plurality of long, wide grooves. Each rib is inclined to the mid-circumferential plane of the tire and extends across substantially the entire width of the tread and over an arc of the tread equal to at least 45 degrees and not more than about 180 degrees. The ribs are uninterrupted by long, wide grooves over substantially their entire length. A short, wide groove is located in the portion of each rib adjacent to each axially outer edge of the tread, and each short, wide groove is connected through a transverse groove with a short, wide groove located in the portion of a rib adjacent to the opposite axially outer edge of the tread to aid in water evacuation.

Abstract: A radial tire having an under-tread layer between a cap tread and a breaker layer is disclosed. As the material for the cap tread, a rubber composition is employed which contains 0.5 to 1.6 parts by weight of sulfur per 100 parts by weight of starting rubber components consisting of 25 to 75 parts by weight of polybutadidne rubber having 65 to 90 mol % of 1,2-bonding units and 75 to 25 parts by weight of natural rubber and/or polyisoprene rubber, and which has elongation at break of at least 330% at 100.degree. C. A rubber composition containing 1.6 to 10 parts by weight of sulfur per 100 parts by weight of rubber components is used for the under-tread layer.

Abstract: In order that the stresses upon travel will be as small as possible in the region of the shoulders of a tire, it is molded between a mold and a core which together define a central zone and two lateral zones and, in each of the latter two, the median line of the sidewalls has a point of inversion of curvature located at a distance from the crown of the tire which is greater than the distance of the point of inversion of curvature of the median line of the sidewalls of the tire when mounted on its rim.

Abstract: Composite of rubber and metal reinforcement where the rubber contains a cyanuric acid derivative and optionally a borate. Cured composite is useful as component for rubber tires, industrial belts and hose.

Abstract: A motorcycle tire suitable for running on a road having rain grooves formed on the surface, which has a first main groove circumferentially continuously formed in a central region of the tread portion and second main grooves formed at least one run of unitary groove portions at each side of and with space from the first main groove and having interrupted portions at intervals in the circumferential direction of the tire. The first main groove comprises a plurality of groove segments and a plurality of connecting groove segments, and the groove segments, which lie circumferentially alternately at one and the other of two regions of the tread portion divided and lying closely along the center line of the tread portion and lie parallel to the center line and circumferentially successively spaced, are connected by the connecting groove segments which extend across the center line and connect together the facing ends of each two adjacent groove segments.

Abstract: A pneumatic radial tire having a sandwiched structure formed by embracing side rubber between rubber filler and rubber chafer in the bead portion is disclosed. The tire has a high stiffness in the bead portion and has very excellent durable life.