Fully rotating hook for a lockstitch sewing machine
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United States of America Patent
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-
Oct 4, 1994
Grant Date -
N/A
app pub date -
Jul 1, 1993
filing date -
Mar 12, 1993
priority date (Note) -
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status (Latency Note)
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Abstract
The friction coefficient between a track projection of an inner bobbin case holder and a track groove of an outer loop taker is reduced so that the outer loop taker can be rotated a small torque. One portion of the inner bobbin case holder opposite to a needle location is made of a synthetic resin or a synthetic resin containing metal powder carbon fiber, glass grains, ceramic powder or the like.
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