Method and apparatus for tire uniformity correction

Abstract From the Canadian patent

A tire uniformity machine to process rubber pneumatic tires by sensing their force variations while they are rotating and then grinding rubber therefrom in selected amounts and regions corresponding to the sensed force variations. The machine processes such tires more rapidly than previous machines and, includes mechanical means to rotate the tire at a speed higher than the industry standard of 60 revolutions per minute and rotate the tire at a lower speed to selectively grind rubber therefrom. A sensor is provided to detect force variations in the tire while rotating at the higher speed and in response, thereto, to produce frequency modified electrical signals corresponding to the detected …