Sewing machine having a threading device

Details Sewing machine having a threading device Sewing machine having a threading device

1991-11-15

1992-12-08

Schroeder, Werner H.

Sewing

Stitch forming

Chain or double chain

112225, D05B 5702

Patent

active

051688212

ABSTRACT:
In threading an eyelet of a looper of a sewing machine, a slide member is displaced until a positioning portion of the slide member comes into contact with the looper. In this contact condition, a thread pushing projection for pushing a looper thread is displaced to penetrate into the eyelet of the looper so that the looper thread pushed by the thread pushing projection passes through the eyelet of the looper. The looper thread having passed through the eyelet is grasped by a grasping portion of the slide member. Thereafter, the thread pushing projection is retracted from the eyelet of the looper, and the slide member is returned to an original position, thus completing the threading operation.

REFERENCES:
patent: 1801166 (1928-12-01), Maier
patent: 2483595 (1949-10-01), Olson
patent: 4300463 (1981-12-01), Morimoto
patent: 4461409 (1984-07-01), Biemans
patent: 4557408 (1985-12-01), Biemans
patent: 4649843 (1987-03-01), Muroi et al.
patent: 4977842 (1990-12-01), Fukao et al.
patent: 5020462 (1991-06-01), Sato et al.
patent: 5076181 (1991-12-01), Wang

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