Retread tire having tread band matched to base tread

摘要

A retread tire and methods for its manufacture, the retread tire having a precured tread band bonded to a prepared bonding surface of a base portion of the tire. The precured tread band includes a back face bonded to the prepared bonding surface of the base portion of the tire and a tread groove bottom portion that extends below the back face of the tread band. The tread groove bottom portion may optionally include a void portion of the tread groove and may include the bottom wall of the tread groove and/or just the side walls of the bottom portion of the tread groove. Also included may be a base groove formed in the base portion of the tire and open to the prepared bonding surface of the tire, wherein the tread groove bottom of the tread groove is embedded within the base groove.

主权项

1. A retreaded tire, comprising:
a precured tread band bonded to a prepared bonding surface of a base portion of the tire, the precured tread band comprising a back face bonded to the prepared bonding surface of the base portion of the tire and a tread groove extending within a thickness of the precured tread band and into a tread groove bottom portion that extends below the back face of the tread band, such that the tread groove extends outwardly from the back face; a base groove formed in the base portion of the tire and open to the prepared bonding surface of the tire, wherein the tread groove bottom portion of the tread band is aligned with and embedded within the base groove, the base portion of the tire defining the base groove includes tread material configured for use during a worn life of the retreaded tire; wherein the tread groove is a secondary groove, the precured tread band further comprising a primary groove having a top open to a ground contacting front face of the tread band, wherein a top of the secondary groove is closed to the ground contacting front face of the tread band and is higher than a groove bottom of the primary groove so that the secondary groove top is opened to the ground contacting front face of the tread band prior to disappearance by wear of the primary groove.