Eyelet-buttonhole sewing machine

Details Eyelet-buttonhole sewing machine Eyelet-buttonhole sewing machine

1999-02-24

2000-08-01

Nerbun, Peter

Sewing

Special machines

Buttonhole

112 68, 112 73, D05B 308

Patent

active

060950668

ABSTRACT:
A sewing machine having a table, driven in two directions by two motors and accommodating material to be sewn, sewing tools, and a cutting device for producing a buttonhole in the material to be sewn. The buttonhole is provided with an incision and is bounded by zigzag stitches of a buttonhole bead, running around the incision. The incision is produced either before or after the sewing of the buttonhole bead. The sewing tools include a needle bar, which is driven up and down and also oscillates in the horizontal direction, and a needle, which is provided at the bottom end of the needle bar and interacts with a looper mounted in the base plate. The sewing tools are drivable in a rotatable manner by a third motor. The sewing machine has a control device, from which various buttonhole shapes stored therein can be retrieved, a device for switching from the pre-cutting mode to the post-cutting mode, and a needle-oscillating device driven by a fourth motor and producing the zigzag stitches. The control device also controls the oscillating motion of the needle bar in order to produce the intermediate material, required in the post-cutting mode, within the buttonhole bead.

REFERENCES:
patent: 1991627 (1935-02-01), Reece
patent: 5873314 (1999-02-01), Gamano et al.

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