In
the RINGTREAD production philosophy, operator expertise is irreplaceable
and, along with specific operating machines, makes it possible to determine
whether or not a casing can be retreaded.The ITT inspection machines use the vacuum shearography technique to reproduce the image of the deformations at a microscopic level. By modifying the tyre's load conditions and overlapping images, the machine can detect "bubbles" that indicate separations. This technique is much more precise, faster and more reliable than the methods used today: this makes it possible to create a retread with the best performances, safety and service life.