Method and device for the perforated cutting of a reinforcing ply
AssigneesCompagnie Generale Des Etablissements Michelin, Michelin Recherche et Technique S.A.
InventorsThierry Ducros, Stéphane Ravat, Michel Deboeuf
Life of this patent
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Abstract
A cutting blade, which is useable for cutting a reinforcing strip into reinforcing plies, includes one or more notches disposed at given intervals. When a volume of rubber separating two reinforcing threads is cut by the cutting blade, bridges of rubber are left between a rear edge of a first reinforcing ply and a front edge of a second reinforcing ply.
Claims6
A method for producing a reinforcing ply used in a tyre, the ply including reinforcing threads that are coated in a rubber mixture, the threads being arranged parallel to one another and forming a given angle (α) with a longitudinal direction of the ply, the method comprising steps of:
- cutting through a rubber portion located between two adjacent threads of a reinforcing strip, so as to separate a rear edge (N1r) of a first reinforcing ply (N1) of the reinforcing strip from a front edge (N2f) of a second reinforcing ply (N2) of the reinforcing strip;
- and
- removing the first reinforcing ply (N1) from the reinforcing strip after a predetermined relaxation period has elapsed, the first reinforcing ply (N1) having a given length,
- wherein, in the cutting step, cutting of the rubber portion is interrupted at predetermined intervals in order to leave bridges of rubber between the rear edge (N1r) of the first reinforcing ply (N1) and the front edge (N2f) of the second reinforcing ply (N2).
Dependencies are inferred from the claim text.