Automatic buttonhole stitch proportioning device for sewing mach

Details Automatic buttonhole stitch proportioning device for sewing mach Automatic buttonhole stitch proportioning device for sewing mach

1978-11-02

1980-08-12

Schroeder, Werner H.

Sewing

Work manipulating

Guides

D05B 302, D05B 304, D05B 306

Patent

active

042167310

ABSTRACT:
A buttonhole producing mechanism for a sewing machine is disclosed in which an operator influenced selector dial includes settings for providing two differently proportioned buttonholes. The selector dial is also connected with a zig-zag stitch width influencing mechanism in the sewing machine and arranged automatically to provide that width of zig-zag side stitches in a buttonhole which is appropriate for the selected buttonhole proportion.

REFERENCES:
patent: 3263635 (1966-08-01), Eguchi
patent: 3306242 (1967-02-01), Szostak
patent: 3656443 (1972-04-01), Ross
patent: 3724404 (1973-04-01), Marsh et al.
patent: 3795210 (1974-03-01), Adams et al.
patent: 3834332 (1974-09-01), Gude
patent: 4019449 (1977-04-01), Haut
patent: 4106418 (1978-08-01), Hayashi

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