Restoring device of tension adjusting device for sewing...

Sewing – Elements – Tensioning

Reexamination Certificate

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Reexamination Certificate

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06957616

ABSTRACT:
A restoring device of a tension adjusting device in a transverse arm for a sewing machine includes a main part which has an active member and a passive member on two sides thereof so as to drive two sides of a pressing board of the control set. When the user adjusts the adjusting knob, the control set of the tension adjusting mechanism can be adjusted by the movement of the pressing board so as to prolong the life of use of the control set.

REFERENCES:
patent: 4300464 (1981-11-01), Bonalumi
patent: 4726308 (1988-02-01), Aida et al.
patent: 4803936 (1989-02-01), Mikuni et al.
patent: 5265548 (1993-11-01), Satoma
patent: 6843189 (2005-01-01), Chang

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