Compagnie Générale Des Etablissements Michelin-Michelin & Cie

Compagnie Generale Des Etablissements Michelin

Claude Lescoffit

Andre Dosjoub

A tire includes incisions in a ply of parallel cords of the tire, made pr to the ply's utilization for making the tire. A cutting device for making the incisions is comprised of a reference holder to impose a known orientation to the parallel cords. It is comprised of a blade of a given width C, the blade being positioned transversely relative to the known orientation, the device including an assembly for causing the cutting of the cords by the blade, and including an assembly for moving the blade transversely relative to the holder, and an assembly for moving the ply longitudinally relative to the holder.

Tire with reinforcement comprising cord segments

To assure inflation of a tire 2 during its rotation, a hose 3 is placed on he inside periphery of rim 1. A pressure roller 5, solid with the wheel carrier and therefore non-rotatable, causes a local reduction in the section of hose 3. During rotation of tire 2, air is forced from an orifice 31 forming an air intake, to an inside volume 20 of tire 2, via a check valve 4. To provide deflation, a roller rests on a pusher which controls the opening of valve 4.

Inflation and deflation of a tire in rotation

The rim has at least one stop which may be of great height, provided with a notch which is so shaped and oriented that the tire bead can be mounted from the mounting well up to its seat by relative rotation of the tire and the rim.

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Chamalieres, France

Claude Lescoffit