Buttonhole device for a zig-zag sewing machine

Details Buttonhole device for a zig-zag sewing machine Buttonhole device for a zig-zag sewing machine

1981-04-01

1983-11-08

Schroeder, Werner H.

Sewing

Work manipulating

Guides

D05B 306

Patent

active

044135769

ABSTRACT:
A buttonhole device for a zig-zag sewing machine wherein a rotary shaft is operatively connected to a device for controlling lateral needle oscillation, needle position or base line and work feeding, and is positioned at a first position, a second position, a third position, and a fourth position, respectively, for producing one bar tack, one side stitch, the other bar tack and the other side stitch of a buttonhole. The buttonhole is so constructed that an angle between any two adjacent positions of the shaft may be constant. Thus, indica corresponding to the positions of the shaft or four components of the buttonhole may be shown equally spaced circumferentially on a dial connected to the shaft.

REFERENCES:
patent: 3148645 (1964-09-01), Aiki et al.
patent: 3149591 (1964-09-01), Aiki et al.
patent: 4084524 (1978-04-01), Hasegawa
patent: 4106418 (1978-08-01), Hayashi

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