Sughrue, Mion, Zinn, Macpeak & Seas
Composite rubber bodies using steel cords for the reinforcement of rubber articles
 A composite rubber body is formed by embedding steel cords in rubber and vulcanization-building them. In this case, each of the steel cords is a single steel filament wire or plural twisted steel filament wires obtained by drawing of a wire rod of high carbon steel having a given composition. The filament wires satisfy given relationships between filament diameter and tensile strength before and after the vulcanization and have a retention of loop strength of not less than 55%. 
Bridgestone Bekaert Steel Cord Co., Ltd.
C B C Y B
C21D B60C C21D Y10S B60C
additional inventional inventional additional inventional
Masuhiro Hironori Akihiro
Fujita Sakaguchi Kaneda