Abstract: To provide a tire tube having excellent sealing performance and durability. An inside of a tire includes a peripheral wall having an approximately circular cross-section which is partitioned by a partition wall into an outer peripheral side sealant chamber and an inner peripheral side air chamber. The sealant chamber is filled with a sealant having a thickness in the diameter direction in a range of 0.5 to 1.5 mm.

Abstract: A bladder with an anti-tack rubber having suitable curing properties to turn up plies in manufacturing pneumatic tires is provided. In a preferred embodiment, the anti-tack rubber comprises 50 to 45 parts natural rubber cured with 50 to 60 parts chlorosulfonated polyethylene, 0.9 to 1.1 benzothaizyl disulfide and 0.9 to 1.1 phenylenediamine. A method of making the anti-tack rubber comprises mixing a first rubber and an anti-tack composition and blending curing agents to form a workable anti-tack rubber with suitable curing properties. An improved and simplified method to form a bladder with suitable anti-tack and curing properties, and a method for using a bladder to turn plies in manufacturing pneumatic tires, wherein the bladder is made from an anti-tack rubber is also disclosed.

Abstract: A method and composition for equalizing radial and lateral forces at the tire/road footprint of a pneumatic tire due to tire/wheel assembly imbalance, non-uniformity of the tire, temporary disturbances in the road surface, or other vibrational effects of the unsprung mass of a vehicle by balancing the tire and inserting a particle mixture into the interior of the tire. The composition used therefor is a dry solid particle mixture wherein the particles are freely flowable and non-tacky at temperatures up to 150° C. The particle mixture is essentially devoid of liquid material, stable and remains free flowing over all conditions of tire usage, has a specific gravity greater than 1, and is available in the particle sizes of 20-200 mesh size, and has sufficient hardness to withstand the repeating tumbling which will occur in a vehicle tire without substantial abrasion.

Abstract: A device for the substantially vertical suspension of tire carcasses, which includes a plurality of articulated supports, the latter being able to bear on the inside of a tire carcass, each of said supports having a convex bearing surface capable of adopting a plurality of angular positions.

Abstract: A mold 20 for curing a precured tread 10 to a tire casing 100 is disclosed. The mold 20 has a first annular portion 24, a second annular portion 44, a pair of annular portions 12,14, and an inflatable bladder 23 for insertion into the casing 100 when enclosed in the cavity 53 of the closed mold 20. The first annular portion 24 has a sidewall supporting member 27, the sidewall supporting member 27 having a bead forming end 29, and a tread supporting member 28 integrally attached and generally normal to the sidewall support member 27. The tread supporting member 28 has a smooth axially contoured annular surface for contacting the radially outer surface of the precured tread 10 and a first end 50 in proximity to the tread lateral end 48 of the second annular portion 44. The second annular portion 44 has a sidewall supporting member 47 and tread lateral end supporting member 48 the second portion 44 having a first end 50 and a second end 52.

Abstract: An air removal and fastener extraction system for use in retreading tires is disclosed. The system includes a strap that is disposed over a splice region of the tread during precure retreading. A plurality of fasteners are inserted through the strap and across the splice. This securely holds the splice region intact, allows air to be vented during curing, and permits removal of all fasteners in a single pulling motion exerted on the strap after the curing process is completed.

Abstract: An inner curing envelope for use during a tire retreading process. The inner curing envelope is placed within the inside of a tire casing and cooperates with an outer sealing envelope for encasing a tire. A plurality of grooves are molded in a tire confronting face of the inner curing envelope to provide passageways to ensure that air/gas located adjacent the interior surface of the tire casing is completely evacuated when a vacuum is drawn within the envelopes.

Abstract: A tire noise reducing system comprises a wheel rim, a pneumatic tire to be mounted on the wheel rim to form an annular tire hollow, and a noise damper to be disposed in the annular tire hollow, wherein the noise damper is a liquid under use conditions, and the noise damper has a certain volume being capable of changing the cross sectional area of the annular tire hollow irregularly in the circumferential direction during rotating, whereby the mode, amplitude and frequency of resonance of the tire hollow are changed irregularly to damp the resonance. The tire noise reducing system may comprises an apparatus for injecting the foamable liquid damper into the tire hollow, which apparatus comprises a container for the foamable liquid damper, a high-pressure gas source to let the foamable liquid damper from the container, and a nozzle for discharging a mixture of the liquid damper and high-pressure gas foam to be injected into the tire hollow.

Abstract: A cured tread making apparatus and method including a tread extruder from which a hot rubber compound continuously exits, a continuous rotational curing device comprising a heated rotatable drum and a cooperating moving tension belt adapted to provide continuous curing pressure against the rotating drum, and cast segments, incorporating a particular tread design, attached to the exterior circumferential surface area of the heated drum.