Sheet-like object for ball and ball
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United States of America Patent
Stats
-
Jan 10, 2012
Grant Date -
Jan 14, 2010
app pub date -
Jul 24, 2007
filing date -
Jul 26, 2006
priority date (Note) -
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status (Latency Note)
Importance
Abstract
, and a total area of the vertical projected area of each valley accounts for 3 to 30% relative to a surface area of the elastic polymer cover layer; a ball used for volleyball or beach volleyball including the sheet-like ball material, which is excellent in the controllability for all types of ball plays such as tossing and serving in the smoothness of the attenuation degree in the ball speed of the ball during flight of the ball, and in the design, e.g., three-dimensional shape, which is not realized in a heretofore-existing ball, and also has a sufficient surface abrasion resistance; and a sheet-like ball material suitably used for such balls.
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