Retreaded tire and method for producing same
AssigneeBridgestone Corporation
InventorTsutomu Tanaka
Life of this patent
Estimating the term…
Abstract
A retreaded tire capable of improving unbalance of the tire is efficiently produced. Retread rubber has the largest thickness in a joint part F on the circumference. Such a joint part F is arranged in a minimal location S (corresponding to a light location of static unbalance), in which a rubber gauge G as measured in a radial direction of the tire from a buffed surface K of a base tire D to an outer surface of an outermost belt cord L embedded in an outermost belt layer disposed in a radially outermost side among belt layers constituting a belt is minimal on the circumference in an equatorial plane of the tire in attaching so that the total rubber gauge of the retread rubber T at the joint part F surely approaches total rubber gauges at other locations on the circumference to effectively reduce unbalance.
Claims5
A method for producing a retreaded tire comprising:
- removing tread rubber from a used tire having a belt consisting of at least one belt layer and the tread rubber to obtain a base tire,
- measuring a rubber gauge on a buffed surface of the base tire over an entire circumference of the buffed surface from which the tread rubber has been removed, the rubber gauge measured in a radial direction of the tire, from the buffed surface to an outer surface of an outermost belt cord embedded in an outermost belt layer disposed in a radially outermost side among belt,
- attaching retread rubber on the buffed surface of the base tire over the entire circumference of the buffed surface, a leading end part of the retread rubber being arranged to overlap with a location on the base tire, in an equatorial plane of the tire, where the rubber gauge is minimal on the circumference, to form a joint part of the retreaded tread rubber at the minimal location of the rubber gauge, and
- vulcanizing the base tire to which the retread rubber has been attached to obtain a retreaded tire,
- wherein the rubber gauge is measured with a contactless measurement sensor,
- wherein the contactless measurement sensor is an eddy-current displacement sensor, and
- wherein the belt cords are made of steel.
Dependencies are inferred from the claim text.