Lower thread supply device of sewing machine, and sewing method
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United States of America Patent
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Jun 14, 2022
Grant Date -
Apr 16, 2020
app pub date -
Oct 24, 2017
filing date -
Jun 14, 2017
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Disclosed herein are a lower-thread supply device of sewing machine and a sewing method. The device includes a bobbin case (300) having an outlet (330) from which lower thread is drawn out, and a needle through-hole (340) through which a needle (600) moving downwards with upper thread (a) being fitted passes, and a hook body (200) in which the bobbin case (300) is mounted, the hook body being installed to be rotatable by a power device of a sewing machine, guiding upper thread (a2) on a sewn fabric side to a front area of the bobbin case (300) while catching and dragging the upper thread (a) via a hook (210), and guiding upper thread (a1) on a spool side to a rear area of the bobbin case (300). The bobbin case (300) is installed not to be rotated when the hook body (200) rotates.
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Cited Art Landscape
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