Full rotary hook with an increased amount of bobbin thread wound around the bobbin
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United States of America Patent
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May 5, 1992
Grant Date -
N/A
app pub date -
Mar 6, 1991
filing date -
May 15, 1990
priority date (Note) -
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status (Latency Note)
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Abstract
The amount of a bobbin thread wound in a bobbin of a full rotary hook is increased by making a circumferential portion of a bobbin case holder between a thread separating portion and a thread releasing portion thinner than the remainder of the circumference, thereby increasing the inner diameter of the bobbin case holder. Thereby, the inner diameter of the bobbin housed in the bobbin case holder and the inner diameter of the cylindrical portion housing the bobbin case can be increased and consequently an outer diameter of a flange of the bobbin can be increased, thereby increasing the amount of the bobbin thread wound around the bobbin.
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