Ply with strength carriers embedded in a rubber mixture and...

Details Ply with strength carriers embedded in a rubber mixture and... Ply with strength carriers embedded in a rubber mixture and...

2007-03-13

2007-03-13

Fischer, Justin R. (Department: 1733)

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

C152S451000, C152S527000

Reexamination Certificate

active

10840331

ABSTRACT:
Belt bandage for a vehicle pneumatic tire that includes a ply having strength carriers embedded in an unvulcanized rubber mixture. The strength carriers run essentially parallel to one another. Each strength carrier includes a hybrid cord that has a first twisted yarn having a high modulus of elasticity of at least approximately 25000 N/mm2and a second twisted yarn having a low modulus of elasticity which is no greater than approximately 15000 N/mm2. The first and second twisted yarns are final-twisted together. A cord count E in cords per 5 cm ply widths, a force F1at 2% elongation of each hybrid cord, and a force F2at 6% elongation of each hybrid cord satisfies the following relationships:in-line-formulae description="In-line Formulae" end="lead"?F1×E≧approximately 600 Nin-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?F2×E>approximately 1500 N.in-line-formulae description="In-line Formulae" end="tail"?This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.

REFERENCES:
patent: 5151142 (1992-09-01), Imai et al.
patent: 5408007 (1995-04-01), Mizuno et al.
patent: 5558144 (1996-09-01), Nakayasa et al.
patent: 2002/0079037 (2002-06-01), Yukawa et al.
patent: 0335588 (1989-10-01), None
patent: 0467585 (1992-01-01), None
patent: 0661179 (1995-07-01), None
patent: 1207055 (2002-05-01), None
Patent Abstracts of Japan 04356205 dated Dec. 9, 1992.
ASTM D 885, Apr. 2003, 1 page.

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