| 摘要 |
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.
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