Sewing machine with thread tension releasing mechanism

Details Sewing machine with thread tension releasing mechanism Sewing machine with thread tension releasing mechanism

1999-03-31

2000-04-18

Izaguirre, Ismael

Sewing

Elements

Tensioning

D05B 4700

Patent

active

060502053

ABSTRACT:
A sewing machine includes a thread tension applying mechanism for applying tension to a needle thread supplied from a needle thread supply source to a sewing needle, a thread tension releasing mechanism for releasing the thread tension applying mechanism from a tension applying state, a spring for driving the thread tension releasing mechanism, a switching mechanism for switching the spring between an operative state and a non-operative state, and a drive source for driving the switching mechanism.

REFERENCES:
patent: 3190249 (1965-06-01), Gegauf, Jr.
patent: 3500781 (1970-03-01), Peschke
patent: 4111140 (1978-09-01), Gonnai et al.

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