Back to results
US 2022/0314708 A1Published application
Tire
AssigneeBridgestone Corporation
InventorsTakahiro SUZUKI, Keiichi HASEGAWA
Life of this patent
Estimating the term…
Abstract
In a tire or a tire manufacturing method, a bead section includes a bead member formed by integrally molding a bead core, in which a resin material covers bead cords, and a bead filler made with a resin material covering the bead core, and around which a carcass ply, in the tire, is folded. In a cross-section along a tire widthwise direction and a tire radial direction of the bead member, the bead core is arranged by being shifted with respect to a width-directional center of the bead member.
Claims5
A tire comprising:
- a tread section configured to be in contact with a road surface;
- a tire side section being continuous with the tread section and positioned on an inner side in a tire radial direction with respect to the tread section;
- and
- a bead section being continuous with the tire side section and positioned on an inner side in the tire radial direction with respect to the tire side section, wherein
- a carcass ply as a skeleton of the tire, which is folded outward in a tire widthwise direction via the bead section, is provided in the tire,
- the bead section includes a bead member formed by integrally molding a bead core, in which a resin material covers bead cords, and a bead filler made with a resin material covering the bead core, and
- in a cross-section along the tire widthwise direction and the tire radial direction, a center position of the bead core is arranged by being shifted with respect to a width-directional center of the bead member.
4 more elements
A tire manufacturing method comprising:
- a step of forming a coated cord formed by coating a bead cord with a resin material;
- a step of forming a bead core in which a gap between the bead cords is filled with a resin material by forming the bead core in an annular shape while fusing or bonding the resin materials of the coated cords to each other;
- a step of holding the bead core in a mold by abutting the bead core with a jig provided in a cavity of the mold, the mold configured to mold a bead member to be included in a bead section of the tire;
- and
- a step of molding the bead member by injecting molten resin material into the cavity, wherein
- in the step of holding the bead core, the bead core is held in the mold so that a center position of the bead core is arrange by being shifted with respect to a width-directional center of the cavity to a side at which the jig is arranged, in a cross-section along a tire widthwise direction and a tire radial direction.
3 more elements
Dependencies are inferred from the claim text.