Patent ID: 6332310
Filing Date: 2001-12-25
Classification: B60C,D07B,Y10S

Abstract:
A steel cord formed by twistinga plurality of bunches of filaments together at a twisting pitch (Pc),each said bunch formed by twisting one zigzag filament and one or two nonzigzag filaments together at a twisting pitch (Pf),each said zigzag filament being zigzagged two-dimensionally or in a plane by a zigzag pitch length (Pw) and a zigzag wave height (h) and being made up of straight segments each extending between zigzag peak points,all the zigzag filaments being substantially the same zigzag pitch length (Pw) and the same zigzag wave height (h),the number n of all the filaments being 5 or 6,the number of zigzag filaments being at least 2 but at most (n-e),all the filaments having a diameter (d) of 0.25 to 0.45 mm,the twist pitch (Pc) being 10 to 25 mm,the twist pitch (Pc) being 3 to 20 times the twist pitch (Pf),the zigzag pitch length (Pw) being 5.0 to 30.0 times the diameter (d),the zigzag wave height (h) being 0.2 to 3.0 times the diameter (d),the product of the diameter (d) and height (h) being in 0.014 to 0.028 times the pitch length (Pw).