Automatic needle thread supply control system for a sewing machi

Details Automatic needle thread supply control system for a sewing machi Automatic needle thread supply control system for a sewing machi

1987-07-02

1988-10-11

Nerbun, Peter

Sewing

Elements

Thread guiding or handling

112254, D05B 4704

Patent

active

047762934

ABSTRACT:
A sewing machine system is disclosed for accurately controlling the amount of supply of a needle thread to a thread take-up member from a thread supplying source in response to various conditions of sewing.
The system controls supply and withholding of the needle thread with an accurate timing by putting an electrostrictive element into operation or non-operation in relation to a parameter signal on sewing conditions and a synchronizing signal derived from the timing of rotation of the arm shaft of sewing machine.

REFERENCES:
patent: 4215641 (1980-08-01), Dobrjanskyj et al.
patent: 4289087 (1981-09-01), Takenoya et al.
patent: 4408554 (1983-10-01), Takiguchi
patent: 4565143 (1986-01-01), Hanyu et al.

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