Oscillating-arm apparatus for producing a tire reinforcement from a single thread
AssigneeMichelin Recherche et Technique S.A.
InventorJean-Claude Mayet
Life of this patent
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Abstract
The thread 4, intended to form a carcass reinforcement, is laid in continguous hoops on a rigid core 1 by a system with at least two oscillating arms transporting an orifice 6 so as to enable it to pass over a core 1 and thus lay adjacent hoops.
Claims20
Apparatus for producing a tire reinforcement from a thread delivered substantially continuously and on request by an appropriate dispenser, the apparatus being intended to be used in cooperation with a substantially toroidal form on which the reinforcement is progressively constructed by laying hoops of the thread on a desired path for the thread on the surface of the form, the apparatus comprising:
- a guiding member in which the thread can slide freely;
- at least one arm oscillating about a first geometrical axis of rotation, the oscillating arm comprising a head remote from the first geometrical axis of rotation, the head of the oscillating arm transporting the guiding member directly, or indirectly via one or more other arms to guide the thread along the desired path;
- control means for imparting to the oscillating arm an oscillatory movement about the first geometrical axis of rotation;
- means for varying the radial distance between the head and the first geometrical axis of rotation;
- and
- pressure means adjacent each end of the path for applying the thread to the form at the respective ends of the path.
A method for producing a tire, in which a reinforcement is produced from a thread delivered substantially continuously and on request by an appropriate dispenser, using a substantially toroidal form on which the reinforcement is progressively constructed by laying hoops of the thread on a desired path for the thread on the surface of the form, by means of
- a guiding member in which the thread can slide freely;
- at least one arm oscillating about a geometrical axis of rotation, the oscillating arm comprising a head remote from its geometrical axis of rotation, the radial distance between the head and the geometrical axis of rotation of the arm being variable;
- control means for imparting to the oscillating arm an oscillatory movement about its geometrical axis of rotation, the apparatus being arranged so that the head of the oscillating arm transports the guiding member directly, or indirectly via one or more other arms;
- pressers close to the respective ends of the path for applying the thread to the form at the ends;
- the head having a cyclical movement included in a movement plane, in order to bring the guiding member in successive cycles into the vicinity of each of the desired ends for the thread in the path;
- and
- the pressers acting in synchronism with the cyclical movement of the guiding member to apply lengths of thread from one of the beads of the tire to the other bead.
Dependencies are inferred from the claim text.