Metal cords for rubber reinforcement and tires using the same
AssigneeBridgestone Corporation
InventorsMotonori Bundo, Kazuma Morotomi
Life of this patent
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Abstract
A metal cord usable for the reinforcement of rubber articles is comprised of a helically formed single wire filament having a twisting angle of 75-84.5.degree. or a bundle of two twisted metal filaments each having a twisting angle of 75-84.5.degree.. Such metal cords are preferably used as a rubber reinforcement in each part of a pneumatic tire.
Claims3
A metal cord formed by twisting two metal filaments at the same pitch, characterized in that a twisting angle .alpha..sub.1 is represented by an equation (1) of 75.degree..ltoreq..alpha..sub.1 .ltoreq.84.5.degree. and said filaments are contacted with each other at two positions per one twisting pitch.
Dependencies are inferred from the claim text.