Ball for ball game and method for manufacturing the same
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United States of America Patent
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May 19, 1998
Issued Date -
N/A
app pub date -
Sep 8, 1997
filing date -
Oct 5, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A ball for ball game comprising: a leather skin layer formed by sewing a plurality of leather panels by a thread, the leather skin layer having a spherical shape; and a bladder made of an elastomer having a hollow spherical shape, the bladder being accomodated in the leather skin layer, the bladder being provided with a valve for feeding air into the rubber bladder, the bladder being charged with air through the valve; wherein the thread is made of a self-shrink thread which is subjected to a shrinking treatment after sewing.
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Family
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