A process and an apparatus for optimising tyres after vulcanization, in order to improve the dynamic behavior of the tyre itself. When the first element is held stationary, the second element rotates at a higher speed than the third and fourth elements. Each fuel flow plate includes ribs that separate inlet channels from outlet channels. Therefore, the overall dimension of the circuit board can be reduced to make the electronic devices smaller, especially for thin electronic devices such as LCD TVs and screens.