Compagnie Generale Des Etablissements Michelin

Thomas Guy

Christophe Le Clerc

David Doisneau

Nicole Dajoux

Anne-Lise Thuilliez

Henri Hinc

Gael Roty

Jacky Pineau

Michel Deboeuf

Patrick Marchal

David Hernandez

Augustin Bosquet

Drum () for manufacturing a tire blank, comprising a shaft, two flanges () movable in translation along the shaft, and means for supplying compressed air, each flange comprising at least one pneumatic effector (). At least one flange comprises a first, radially internal ring () and a second, radially external ring () movable in rotation around the first ring by means of at least two airtight pivot connections (), the rings and the pivot connections delimiting at least one sealed chamber (), said flange comprising at least one first compressed-air circulation channel (), a first section () of the first channel belonging to the first ring being connected at one of its ends to the sealed chamber, and a second section () of the first channel belonging to the second ring being connected at one of its ends to the sealed chamber.

Drum and method for manufacturing a tire blank

A radially expandable building drum, in which is intended for manufacturing an adapter for mounting a tire on a wheel rim, includes a central shaft, a first set of segments, and a second set of segments. All of the segments are arranged circumferentially around the shaft to form a generally cylindrically shaped external face of the drum. The segments of the first set and the segments of the second set face one another axially. The drum is structured to allow a different radial expansion of the segments of the first set in relation to the segments of the second set, between two working positions.

Drum and method for assembling an adapter for mounting a tire on a wheel rim

A tire includes a carcass ply, two beads, two sidewalls, and a crown reinforcing zone. The carcass ply connects the two beads by way of the two sidewalls. The crown reinforcing zone is positioned radially external to the carcass ply. The crown reinforcing zone includes a plurality of reinforcing strips disposed in at least two layers. The reinforcing strips are coated in an elastomeric composition. A mean overlap between the reinforcing strips of the two layers is greater than 40%. The reinforcing strips are made of a thermoplastic film having a modulus greater than 0.9 GPa, and preferably greater than 2 GPa, in a main direction and in a transverse direction.

Pneumatic tire comprising reinforcing elements in the form of multi-layer tapes

A reinforcing element, having a cross section with a flattened overall shape and extending in a main direction and comprising at least one lateral edge made of a polymeric composition comprising a thermoplastic polymer, the lateral edge extending in a general direction substantially parallel to the main direction is treated by heating at least a part of the lateral edge, during which at least a part of the lateral edge is subjected to a plasma flow so as to raise the temperature of the part of the lateral edge above the melting point of the thermoplastic polymer.

Process for treating a reinforcing element having a flattened cross-section

The reinforcing element () has a cross-section with a flattened overall shape having an aspect ratio greater than or equal to 5 and extending in a main direction (Z). It comprises a lateral edge () made of a polymeric composition comprising a thermoplastic polymer, the lateral edge () extending in a general direction substantially parallel to the main direction. The reinforcing element () is such that R=(Uc&#x2212;U)/Uc&#x3e;11%, where Uc is the average value of the microhardness of the reinforcing element () measured in its central part, and Uis the average value of the microhardness of the reinforcing element () measured at its lateral edge (). The lateral edge () does not have any ridges.

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Clermont-Ferrand, France

Thomas Guy