Patent ID: 6521070
Filing Date: 2003-02-18
Classification: B29C,B29D,B60C,Y10S

Abstract:
A method for providing hard granules into a surface layer of tire tread bodies, said method comprising the steps of:supplying an extruded rubber tread strip from a rubber tread strip extruder, rolling said rubber tread strip onto a pre-treated tire in a predetermined number of laterally contiguous strip layers to form an outermost surface layer from a plurality of the strip layers by use of a rolling device, wherein each layer at least partly overlapping a previous rolled strip layer, distributing said granules according to a predetermined configuration onto only a section of an upper surface of said rubber tread strip before a succeeding layer of said tread strip is rolled onto the pre-treated tire, and distributing the granules by use of distributing equipment arranged in a space between the extruder and the rolling device and so arranged that the granules are distributed onto an upward facing surface of the section of the rubber tread strip allowing the granules to be located in a wearing surface of the tire after vulcanization and pattern formation.