Patent ID: 7021351
Filing Date: 2006-04-04
Classification: B60C

Abstract:
1. A bead core for pneumatic tires comprised of a ring-like bead core main body in which a single bead wire is wound in a multi-seriate and multi-staged manner, and staple fittings made of metallic material, wherein the bead core main body is arranged in that an outer peripheral surface of the bead core main body includes angular portions that project outward in a meridian section including a central axis thereof, wherein the staple fittings are arranged in that they are warped in a C-shaped manner for preventing loosening of the bead wire by surrounding the outer peripheral surface of the bead core main body, wherein the staple fittings comprise concave portions at an inner peripheral surface thereof for restricting positional shift of the staple fittings around the bead core main body with the angular portions entering the concave portions, and wherein at least a part of the inner peripheral surface of the staple fittings is deformed in a wave-like manner by forming the concave portions in a repetitive manner in a length direction of the staple fittings to correspond to at least some of the angular portions.