FLATTENED HELICAL TIRE CORD

WIPO Patent Application WO2003087620

A3

A tire cord having core filaments (10) performed into a helical configuration while maintaining the core filaments (10) in a parallel, side-by-side relationship. The core filaments (10) are not twisted or stranded together. High tensile strength sheath filaments (11) are also performed into a flattened helical configuration so that the sheath filaments (11) can be wrapped around the side-by-side core filaments such that the sheath filaments (11) do not put such tension on the core filaments (10) as to cause the core filaments (10) to bunch. The core filaments (10) are maintained in a flat side-by-side configuration so that no voids are formed and rubber can penetrate into the tire cord. The core filaments (10) may number from three to six and the sheath filaments (11) from one to seven. The cross-section of the tire cord is flattened and confined within an oval-shaped outer bound (21), the oval outer bound (21) being characterized by a major axis and a minor axis. It is desirable that the minor axis be no greater than 60% of the major axis to create the appropriate difference in the bending modulus of the tire cord in the horizontal versus the vertical direction.

JP5467869	Steel cord-rubber complex
JP5403887	A steel code for tire reinforcement, and a pneumatic tire
JP2008068656	PNEUMATIC RADIAL TIRE

KOBAYASHI TAKANORI (JP)
SMITH WILLIAM E (US)
SMITH CHARLES E JR (US)
MORIOKA NORITAKA (US)

PCT/US2003/010824

January 15, 2004

April 07, 2003

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TOKUSEN U S A INC (US)
KOBAYASHI TAKANORI (JP)
SMITH WILLIAM E (US)
SMITH CHARLES E JR (US)
MORIOKA NORITAKA (US)

D07B1/06; (IPC1-7): D02G3/48

JPH09175112A	1997-07-08
US4545190A	1985-10-08
US5198307A	1993-03-30
US4022009A	1977-05-10

See also references of EP 1492966A4

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