Multi-strand cable of 1×N structure for protective reinforcement of a tire

A method for manufacturing a multistrand cable having a 1×N structure and including a single layer of N strands wound in a helix, in which each strand includes an internal layer of M internal threads wound in a helix and an external layer of P external threads wound in a helix around the internal layer, the method comprising steps of:

• (1) individually assembling each of the N strands by twisting, during which, in chronological order:
• (a) the M internal threads are wound in a helix to form the internal layer, (b) the P external threads are wound in a helix around the internal layer, and (c) the M internal threads and the P external threads are elongated such that a structural elongation (Asp) associated with the P external threads of each strand is greater than or equal to 0.05%;
• and
• (2) collectively assembling the N strands by twisting, during which the N strands are wound in a helix to form the cable,
• wherein, during the step of individually assembling each of the N strands, a tensile force is applied to the internal layer and a tensile force is applied to the external layer, with the tensile force applied to the internal layer being greater than the tensile force applied to the external layer.

A method for manufacturing a multistrand cable having a 1×N structure and including a single layer of N strands wound in a helix, in which each strand includes an internal layer of M internal threads wound in a helix and an external layer of P external threads wound in a helix around the internal layer, the method comprising steps of:

• (1) individually assembling each of the N strands by twisting, during which, in chronological order:
• (a) the M internal threads are wound in a helix to form the internal layer, (b) the P external threads are wound in a helix around the internal layer, and (c) the M internal threads and the P external threads are elongated such that a structural elongation (Asp) associated with the P external threads of each strand is greater than or equal to 0.05%;
• and
• (2) collectively assembling the N strands by twisting, during which the N strands are wound in a helix to form the cable,
• wherein, during the step of collectively assembling the N strands:
• (a) the N strands are wound in a helix at a pitch p3, (b) the N strands are overtwisted so as to obtain a temporary pitch p3′<p3, and (c) the N strands are untwisted to the pitch p3 so as to obtain a residual torque of substantially zero.

A method for manufacturing a multistrand cable having a 1×N structure and including a single layer of N strands wound in a helix, in which each strand includes an internal layer of M internal threads wound in a helix and an external layer of P external threads wound in a helix around the internal layer, the method comprising steps of:

• (1) individually assembling each of the N strands by twisting, during which, in chronological order:
• (a) the M internal threads are wound in a helix to form the internal layer, (b) the P external threads are wound in a helix around the internal layer, and (c) the M internal threads and the P external threads are elongated such that a structural elongation (Asp) associated with the P external threads of each strand is greater than or equal to 0.05%;
• and
• (2) collectively assembling the N strands by twisting, during which the N strands are wound in a helix to form the cable,
• wherein during the step of individually assembling each of the N strands, the M internal threads and the P external threads are wound at intermediate pitches p1′ and p2′, respectively, and
• wherein during the step of collectively assembling the N strands, the N strands are wound at a pitch p3 such that the M internal threads and the P external threads have final pitches p1 and p2, respectively, satisfying a relationship of p2/p2′<p1/p1′.

A strand comprising:

• an internal layer of M internal threads wound in a helix;
• and
• an external layer of P external threads wound in a helix around the internal layer,
• wherein a structural elongation (Asp) associated with the P external threads is greater than or equal to 0.05%, and
• wherein, during assembling of the strand, a tensile force is applied to the internal layer and a tensile force is applied to the external layer, with the tensile force applied to the internal layer being greater than the tensile force applied to the external layer.