Sewing – Stitch forming – Zigzag
Patent
1990-05-21
1991-02-26
Nerbun, Peter
Sewing
Stitch forming
Zigzag
112153, 112275, 112306, 112314, D05B 302
Patent
active
049953281
ABSTRACT:
An edge tracing sewing machine includes a reciprocable needle bar having a needle at a lower end, a needle position sensor for detecting needle-down position, a presser bar having a presser foot at a lower end, a presser foot switch for detecting an upper position of the presser foot, a vertical feed driving device, a forward feed driving device for feeding a work fabric in a sewing direction, a lateral feed driving device for feeding the work fabric in a lateral direction perpendicular to the sewing direction, a fabric-edge position detector, a tracing width setting device, and a control device. The control device controls the lateral feed driving device based on signals from the fabric-edge position detector and the tracing width setting device, so as to carry out a tracing sewing with the tracing width set by the tracing width setting device. The control device changes the tracing width set by the tracing width setting device to a new tracing width corresponding to a distance between the needle and the fabric-edge in the lateral direction when the presser bar is in the upper position and the needle is in the needle-down position, based on a signals from the needle position sensor and the presser foot switch.
REFERENCES:
patent: 4722288 (1988-02-01), Nomura et al.
patent: 4736699 (1988-04-01), Dobner et al.
patent: 4869189 (1989-09-01), Horie et al.
Brother Kogyo Kabushiki Kaisha
Nerbun Peter
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