Sewing – Stitch forming – Revolving-hook type
Patent
1990-09-17
1992-05-05
Schroeder, Werner H.
Sewing
Stitch forming
Revolving-hook type
112229, D05B 5714
Patent
active
051097826
ABSTRACT:
A bobbin-thread supply device for a sewing machine. The operator inserts the bobbin into the bobbin holder, draws bobbin thread from the bobbin, and passes the tip of the bobbin thread through the slit in the cover above the bobbin holder. Since the slit in the cover extends above where the tension bracket is joined onto the tension spring, the bobbin thread is guided between the tension bracket and the tension spring through the tension regulating portion. The bobbin thread can thus easily be set with appropriately tension applied thereon. At the same time, the length of the bobbin thread can be adjusted for proper sewing operation.
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Brother Koygo Kabushiki Kaisha
Izaguirre Ismael
Schroeder Werner H.
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