Abstract: A molding and/or vulcanizing press that is provided with two adjacent sites for containing two corresponding vulcanizing molds, each mold comprising at least two opposite sections, lower and upper sections respectively, that are reciprocally shiftable axially, defining a cavity inside which a product is molded and/or vulcanized, each section being mounted on corresponding tables. A device is provided for coupling the molds integral with a beam and a base and interposed respectively between the beam and an upper table and between the base and a lower table. The device is provided with coupling surfaces with corresponding matching surfaces provided on the tables for allowing each mold relative shifting between the closed and pressurized mold and a frame.

Abstract: A tire vulcanizer which includes a lower mold assembly secured to a press base, an upper mold assembly held movably up and down on a press side frame and provided to be opened and closed with respect to the lower mold assembly, a molding bladder expansible with respect to a center mechanism of the lower mold assembly and pressurized heating medium supplying means, wherein for maintaining a parallelism of the upper and lower mold assemblies, a torsion shaft for maintaining the parallelism which is movable up and down and rotatable about an axis in synchronism with the upper mold assembly is mounted at a position parallel to the press base, at a right angle to the side frame and not interfering with the upper and lower mold assemblies.

Abstract: A hydraulic tire curing press comprises a center column and two outer columns respectively located at the apex and ends of a shallow V, and a pair of press cavities each located between the center column and a respective outer column. The press cavities each include a lower cavity part and an upper cavity part, the latter being supported by and between the center column and respective outer column for vertical movement by an in line or shallow V arrangement of actuators which raise and lower the upper cavity parts in order to open and close the press cavities. The center column, when at the front of the press, is used as a common mount for a pair of tire loaders respectively associated with press cavities.

Abstract: A mold for molding tires having complimentary sidewall rings and mating with a split tread ring having two halves each being a single cast piece having the tire tread pattern indicia on the inside thereof and extending from the inside tread pattern all the way to the outside diameter of the mold.

Abstract: A process of manufacturing a bladder which is to be disposed on each of axially opposite end portions of a tire building machine having a tire building drum, respectively, and is employed for turning back a ply cord bound on the tire building drum of the tire building machine, comprising of the steps of binding a bladder material on a cylindrical member, the bladder material being reinforced with cords and unvulcanized, the cylindrical member having two annular grooves formed in the outer peripheral portion thereof, binding a cloth belt containing water around the outer peripheral surface of the bladder material so that the bladder material is shaped conformingly to the outer peripheral portion of the cylindrical member and the two annular grooves, vulcanizing in a vulcanizing vessel the bladder material to form two annular ridges on the bladder material conformingly to the shape of the annular groove, and taking out the bladder material from the vulcanizing vessel and turning back the bladder material around

Abstract: A process is provided for vulcanizing a vulcanizable endless belt which is substantially V-shaped in cross-section, substantially uniformly, by heating the belt through its minor base and converging sides and then cooling the belt from its minor base and converging sides more rapidly than cooling of the major base. An apparatus for practicing the process has a drum and a substantially concentric jacket in spaced relation about the drum. An annular inflatable diaphram is disposed in the space between the drum and jacket. A belt to be vulcanized is placed in an annular groove in the drum, the diaphram is inflated to press the belt in the groove against the surfaces thereof. The surfaces of the groove facing the minor base and the converging sides are heated while the major base is flush with the surface of the drum and is not heated.

Abstract: The invention relates to a method of moulding a tire for a wheel rim by means of a mould having mould parts, said mould parts being movable between a closed working position in which they enclose a mould cavity with the shape of the tire and an open position in which said mould parts are spaced apart, wherein in the open position of the mould parts a hollow tire core is positioned in the mould cavity while being receivable with respect to said parts, wherein the mould parts are moved into the working position, in which a residual cavity not occupied by the tire core is left free in the mould cavity, said residual cavity. Preferably the tire core is arranged on the wheel rim before being positioned with respect to the mould parts. The invention also provides a device for moulding a tire and a tire obtained with the aid of the method and device.

Abstract: A centrifugal casting machine (20) has a first rotatable shaft (33) and a second rotatable shaft (45) as well as a rotatable core member (100) having a central opening, with at least one of these shafts being adapted for reciprocal movement so as to extend into the core member central opening and adjacent to the other one of the shafts (33) and (45). First (73) and second (83) mold halves are located on opposite sides of the core member (100) and each is adapted to move inwardly and outwardly between open and closed positions. The mold halves (73) and (83) are rotatably supported on bearing means (75) and (85) and in closed position are adapted to rotate with the core member (100) and define a cavity (128) in combination therewith. The improvement takes the form of the addition of mold isolator means (130) and (132) between the bearing means (75) and (85) and the mold halves (73) and ( 83).

Abstract: A fixture for bonding an elastomeric solid tire to a rim of a wheel. The fixture has mating first and second die portions defining an annular cavity constructed and arranged to receive the wheel and the tire with a bonding agent therebetween to be cured. The cavity and the tire define a circumferentially continuous passage into which a fluid is admitted under pressure to urge the tire radially inward into firm engagement with the rim of the wheel and heating elements are disposed radially inward of and adjacent the rim to raise the rim to an elevated temperature to cure the bonding agent and thereby firmly adhere the tire to the wheel.

Abstract: The invention provides an apparatus for molding vehicle tires. Component parts of the tire are molded separately in molds having different shells but using the same core. The parts of the tire are at least partially vulcanized at the same time as they are molded.

Abstract: A body having rubber material thereon is positioned on a lower member, and an upper member is moved toward the lower member, such relative movement causing tread-forming shoes to move to inward positions to form a tread on the rubber material. As an alternative, the upper and lower members may be brought together, and rubber material may be injected into position to have a tread formed thereon. Upon movement of the upper and lower member relatively apart, the rubber material is made to remain in contact with the shoes, and the body is removed, whereupon an annular core having rubber material thereon is disposed on the lower member, and the upper and lower members are again brought together to deposit the rubber material in contact with the shoes onto the rubber material on the core.

Abstract: A body having rubber material thereon is positioned on a lower member, and an upper member is moved toward the lower member, such relative movement causing tread-forming shoes to move to inward positions to form a tread on the rubber material. As an alternative, the upper and lower members may be brought together, and rubber material may be injected into position to have a tread formed thereon. Upon movement of the upper and lower member relatively apart, the rubber material is made to remain in contact with the shoes, and the body is removed, whereupon an annular core having rubber material thereon is disposed on the lower member, and the upper and lower members are again brought together to deposit the rubber material in contact with the shoes onto the rubber material on the core.

Abstract: A tire molding matrix comprising a plurality of projections on the tread molding surface of the matrix, the projections being for molding a first, radially outer and a second radially inner, pattern in the tread of the tire incorporating at least one main drainage groove, the configuration of the projections changing distinctively at a predetermined level which is substantially parallel to the surface of the matrix for molding the tread ground-contacting surface of the tire and which is situated at a depth which is a predetermined amount less than the depth of the projection for molding the main drainage groove, the second pattern comprising a wholly radial extension of only a part of the first pattern.

Abstract: A method of increasing the tread and sidewall life of a radial belted pneumatic tire with an open end belt in which the tire is cured in a mold with the central portion of the tread in a curved configuration having the same tread radius and the margins of the tread having an increased tread radius. The sidewalls are cured with the maximum sectional width of the tire spaced from the bead baseline a predetermined distance greater than 55 percent of the maximum section height of the tire so that upon inflation of the completely manufactured tire to design inflation pressure, the tread surface of the tire will have a substantially constant tread radius across the tread profile for even wear of the tread and the tension in the sidewalls will be reduced for increased life of the tire.

Abstract: A contractible segmented rigid core of a tire-curing mold is disclosed comprising a plurality of sectors, and means which permit a reduction of the transversal dimensions of the sectors to facilitate removal thereof from the cured tire, said means comprising forming each of the sectors in three parts transversely of the mold, one a central part provided with means for producing a movement under the action of resistant elastic or resilient biasing means along the symmetrical plane of the sector, and two lateral parts being adapted to oscillate, in contrast with the elastic or resilient biasing means, with respect to an axis in the symmetrical plane of the sector and thereby having reduced transversal dimensions. Means are included for preventing any displacement of the sectors when in their expanded position relative to the parts which comprise them, no matter what stresses may be applied to them during the tire curing operation.

Abstract: The present disclosure illustrates a hub assembly for holding core segments which segments as held by the hub assembly are utilized in the centrifugal casting of vehicle tires. The core segments are held in circumferentially extending relationship to each other to form an annularly extending core. The hub assembly is comprised of a hub member and a hub ring that can be quickly and conveniently connected together to hold the core segments and in a like manner can be disassembled to release the core segments so the core segments can be disassembled from their circumferentially extending relationship to each other and removed from a finished tire. The present disclosure also includes an apparatus for automatically, as distinguished from manually, separating and removing the two parts of the hub assembly from the central opening of a centrifugally cast vehicle tire.

Abstract: A casting or injection mold for vehicle tires comprises two separable half-shells together defining an annular cavity into which a segmented core is introduced, radially inwardly converging core segments alternating with parallel-sided or radially inwardly diverging core segments to facilitate extraction of the core from the molded tire. In operation, one or more of the non-converging segments are immobilized within the mold, with the aid of mating formations on these segments and on the two half-shells, while the converging segments are urged radially inwardly by resilient or fluidic forces. In a specific embodiment these forces are supplied by a contractile annular spring with projections received in axially extending undercuts of all the segments.

Abstract: A method and assembly for making a power transmission belt having driving teeth on opposite surfaces thereof and a tensile member embedded therein. The disclosure also relates to a belt made by the method and apparatus.

Abstract: A method and means of curing a solid rubber vehicle tire in which a mass of uncured rubber is attached to the outside of a rim, the rim placed in a mold, and heat applied to the rim causing heat to permeate outward through the rubber, producing a gradient of hardness wherein maximum hardness occurs in the rubber adjacent to the rim and thus where the rubber adheres to the rim. This is accomplished by means of two plates which form, with the rim, a sealed cavity interior of the rim to which cavity steam is applied.

Abstract: The invention is concerned with a curing apparatus for tube-tires. The apparatus includes a restrainer ring fittable about the outer circumference of a tube-tire and a mold comprising a pair of vertically disposed opposing mold members defining a cavity therebetween adapted to mateably hold the tire with the ring thereabout along with means extendible from the mold members for supportingly engaging the ring. Also part of the apparatus are means for moving at least one of the mold members towards and away from the other. Means are also provied communicating with each of the mold members for sealingly abutting against a respective adjacent edge of the restrainer ring along with means for retracting and expanding said abutting means responsive to expansion and contraction of the restrainer ring. Means are further provided within the mold for directing a heated fluid such as hot steam into and out of the tube-tire.