Sewing – Elements – Tensioning
Reexamination Certificate
2006-07-04
2006-07-04
Calvert, John J. (Department: 3765)
Sewing
Elements
Tensioning
Reexamination Certificate
active
07069869
ABSTRACT:
A thread tension regulating apparatus for an over-lock sewing machine is disclosed, wherein there are provided between an adjusting knob and a home position returning lever a first interlock device for displacing a home position returning lever in response to motion of the adjusting knob displacing from a home position in a pressurizing direction, and a second interlock device for displacing the home position returning lever in response to motion of the adjusting knob of the thread tension unit displacing from the home position in a depressurizing direction. These two interlock devices are provided respectively with an interlock obviating device for causing the second interlock device to take a non-operating condition when the first interlock device operates, and an interlock obviating device causing the first interlock device to take a non-operating condition when the second interlock device operates.
REFERENCES:
patent: 5265548 (1993-11-01), Satoma
patent: 5860376 (1999-01-01), Tseng
patent: 6055920 (2000-05-01), Hori
patent: 2686188 (1997-08-01), None
Calvert John J.
Hosei Mishin Seizo Kabushiki Kaisha
Kauffman Brian
Wenderoth , Lind & Ponack, L.L.P.
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