Buttonhole sewing machine

Details Buttonhole sewing machine Buttonhole sewing machine

1991-09-23

1992-06-30

Nerbun, Peter

Sewing

Special machines

Buttonhole

112 68, 112 73, 112447, 1122641, 11212112, D05B 308, D05B 2100

Patent

active

051253496

ABSTRACT:
In a sewing machine for creating buttonholes, a selection switch is used to designate whether the hole will be cut first or the buttonhole will be defined by stitching first. In both cases, stitch width remains constant. Where the buttonhole is outlined by stitches first, a needle bar bight line is offset by a distance .DELTA.X from the bight line followed when the buttonhole is cut first. The result of the .DELTA.X offset is a spacing equal to 2.DELTA.X between the inner edges of the stitched buttonhole providing space in which to cut the buttonhole.

REFERENCES:
patent: 4159685 (1979-07-01), Wurst et al.
patent: 4501207 (1985-02-01), Miyazaki et al.
patent: 4502401 (1985-03-01), Asai et al.
patent: 4727817 (1988-03-01), Sakuma

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