Patent ID: 7073553

Claim:
A device for fabricating a tire reinforcement made from a cord, said device comprising: a frame, wherein the device is adapted to cooperate with an essentially toroidal form which is mounted on said frame and able to rotate about a first rotation axis and on which said reinforcement is progressively built up by laying arcs of said cord along a trajectory desired for said cord on a surface of said toroidal form; a cord laying element through which said cord can slide; an actuation mechanism mounted on said frame, to transport said cord laying element in a cyclic, back and forth movement, bringing said cord laying element in successive cycles close to each end desired for said cord in said trajectory, said actuation mechanism comprising a main arm guided by a first auxiliary arm and a second auxiliary arm, the first and second auxiliary arms being articulated on respective geometrical rotation axes that are essentially parallel to one another and a distance apart; and pressing elements near each of said ends of said trajectory, to apply said cord onto said toroidal form at least at said ends; wherein said main arm is mounted on said first auxiliary arm via a second rotation axis parallel to and spaced from said geometrical rotation axes, and forming an articulation between said main arm and said first auxiliary arm, and wherein said main arm is guided by said second auxiliary arm by means of a cam follower on said second auxiliary arm which cooperates with a slot on said main arm.