Automatic buttonhole stitching method of sewing machine

Details Automatic buttonhole stitching method of sewing machine Automatic buttonhole stitching method of sewing machine

1979-10-15

1988-11-01

Hunter, H. Hampton

Sewing

Elements

Frames

D05B 9700

Patent

active

047811331

ABSTRACT:
A method for automatically stitching by a zigzag sewing machine a button hole, which includes two line-tack stitching parts stitched sequentially, comprises applying a predetermined amount of fabric feeding to a first group of alternate stitches in both line-tack stitching parts, and then applying no fabric feeding to a second group of alternate stitches in the line-tack stitching parts by not moving the fabric relative to the needle in any direction. Inclined stitches and non-inclined stitches which alternate with each other result in each line-tack stitching part.

REFERENCES:
patent: 273727 (1883-03-01), Hallenbeck
patent: 389840 (1888-09-01), Fletcher
patent: 3570433 (1971-03-01), Weisz
patent: 4159688 (1979-07-01), Garron et al.
patent: 4215640 (1980-08-01), Coughenour

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