Sewing machine with both needle bar rocking and thread tension r

Details Sewing machine with both needle bar rocking and thread tension r Sewing machine with both needle bar rocking and thread tension r

1998-05-19

2000-05-02

Izaguirre, Ismael

Sewing

Stitch forming

Zigzag

112254, D05B 0300, D05B 4704

Patent

active

060559209

ABSTRACT:
A sewing machine includes a needle bar rocking mechanism for rocking a needle bar in a direction crossing a direction in which a workpiece cloth to be sewn is fed, a thread tension applying mechanism for applying tension to a needle thread supplied from a needle thread supply to a sewing needle mounted on the needle bar, a thread tension releasing mechanism operating the thread tension applying mechanism so that the needle thread is released from the tension applied to it by the thread tension applying mechanism, and a single rotary actuator for driving both of the needle bar rocking mechanism and the thread tension releasing mechanism.

REFERENCES:
patent: 2609772 (1952-09-01), Casas-Robert
patent: 4858548 (1989-08-01), Echeverria

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