| 摘要 |
<p>A run flat pneumatic tire includes a thin annular monolithic band (2) embedded in the crown portion of the tire wherein the band has a helical cut (20) extending between opposite band edges (15, 16). The cut (20) has an arcuate length between 45° and 360° and provides a circumferentially expandable band which enhances molding of the tire by enabling the band to expand during molding to minimize porosity and reduce entrapment of air between the band and tread rubber. Alternately, a pair of helically cut bands are joined by an intervening band of rubber and a reinforcing layer of reinforcing cords in a rubber skim may extend about the outer surface of the expandable band or bands.</p> |
