Textiles: spinning – twisting – and twining – Apparatus and processes – With wire or strand preforming or shaping
Reexamination Certificate
2005-08-09
2009-02-24
Hurley, Shaun R (Department: 3765)
Textiles: spinning, twisting, and twining
Apparatus and processes
With wire or strand preforming or shaping
Reexamination Certificate
active
07493748
ABSTRACT:
A pneumatic tire includes metal cords each made of metal filaments twisted together, the metal cords having an initial elongation in a range of from 0.05 to 0.20% and a standard deviation of the initial elongation in a range of not more than 0.02. A method of manufacturing the metal cord comprises shaping metal filaments in a two-dimensional zigzag waveform, and twisting the shaped metal filaments together, wherein the number of the filaments is in a range of from 8 to 12, the metal filaments have the same diameter (d) of from 0.15 to 0.30 mm, the shaped metal filaments have the same zigzag waveforms, the zigzag waveform of each said shaped metal filament has constant wave lengths (P) and constant wave heights (h) wherein the ratio (P/d) is in the range of 100/3 to 700/3, and the ratio (h/d) is in the range of 5/3 to 80/3.
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Birch & Stewart Kolasch & Birch, LLP
Hurley Shaun R
Sumitomo Rubber Industries Ltd.
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