Method of automatic buttonhole stitching with a computerized sew

Details Method of automatic buttonhole stitching with a computerized sew Method of automatic buttonhole stitching with a computerized sew

1985-08-14

1987-09-29

Nerbun, Peter

Sewing

Elements

Frames

112447, 112456, D05B 306

Patent

active

046962450

ABSTRACT:
In a computerized sewing machine, initial coordinate values of amplitudes of needle drops (the stitching width) for line-and bar tacks of a buttonhole are stored in a ROM. Desired stitching amplitude values and cut width values are selected by external setting means on the machine and stored in a RAM. The stored desired data are adjusted to coordinates of the present initial values in such a manner that selected needle drop or stitching amplitude values are offset in parallel relative to a center value of a maximum stitching amplitude available in the machine. The widths of stitches of the left-and right line tacks remain unchanged for different cut widths of a buttonhole and only the amplitudes of the bar tack stitches are adjusted to a particular cut width.

REFERENCES:
patent: 4159685 (1979-07-01), Wurst et al.
patent: 4502401 (1985-03-01), Asai et al.

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