Presser foot lift device for a top feed sewing machine

Details Presser foot lift device for a top feed sewing machine Presser foot lift device for a top feed sewing machine

1985-01-31

1986-06-17

Schroeder, Werner H.

Sewing

Stitch forming

Feeding work material

112311, D05B 2704, D05B 2902

Patent

active

045949581

ABSTRACT:
A presser foot lift device for an upper feed sewing machine is so arranged that an upper feed tooth is initially lifted and then lifted along with a presser foot only after the lower surface of the upper feed tooth is at a position above the upper surface of the presser foot. This two-step lifting motion is made feasible by the combined operation of an elongated slot formed in a manually rotated actuating arm and a pin formed on an actuator pivotally mounted in coaxial fashion on a supporting shaft of the actuating arm and so adapted as to be introduced into the elongated slot.

REFERENCES:
patent: 3437062 (1969-04-01), Hacklander
patent: 3570426 (1971-03-01), Kunes
patent: 4503794 (1985-03-01), Ishihara et al.

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