Ring manufacturing method, apparatus of the same and rings manufactured by the ring manufacturing method
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United States of America Patent
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Dec 16, 2014
Issued Date -
N/A
app pub date -
Aug 24, 2012
filing date -
Aug 25, 2011
priority date (Note) -
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Abstract
Form the oval rings 25 from the circular rings 23. Then, twist the oval rings 25, for instance three times, around center of the longitudinal direction, and create the ring portion for male 31 and the binding portion at the both side of the binding portion. After that, obtain the rings for male 2 and the rings for female 3 by cutting the binding portion.
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