Upper feeding device of a sewing machine

Details Upper feeding device of a sewing machine Upper feeding device of a sewing machine

1985-06-07

1986-10-14

Schroeder, Werner H.

Sewing

Stitch forming

Feeding work material

112311, D05B 2704

Patent

active

046165860

ABSTRACT:
The present invention provides an upper feeding device of a sewing machine comprising a feeding presser foot and a holding presser foot alternatingly cooperating with it, to which is imparted by means of an oscillating means and a angle lever coupled thereto, an up and down motion extending perpendicular to a throat plate of the sewing machine. To provide an optimal drive of the presser feet, the oscillating means is formed by a cam means coacting with a jogging mechanism coupled to the angle lever. The jogging mechanism is provided with a translatorily movable slider extending vertically to the direction of movement of the presser feet. The slider is drivable at an interchangeable lever ratio by a shaft via a slide block-guide.

REFERENCES:
patent: 3927629 (1975-12-01), Vollmar
patent: 4116145 (1978-09-01), Nicolay
patent: 4341172 (1982-07-01), Thompson
patent: 4422398 (1983-12-01), Dusch
patent: 4446803 (1984-05-01), Nicolay et al.
patent: 4476796 (1984-10-01), Vollmar

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