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US 4,088,085 AGranted
Sewing device for producing form seams
AssigneePfaff Industriemaschinen GmbH
InventorWalter Hager
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AssigneePfaff Industriemaschinen GmbH
InventorWalter Hager
Estimating the term…
A sewing device for producing form seams is usable with a sewing machine having a needle which reiprocates in respect to a cooperating rotary hook. The sewing machine also includes a guide mechanism for guiding a workpiece along a path corresponding to the configuration of the form seam in respect to the needle. The device includes a workpiece support member having a stitch hole for the passage of the needle and a force-away surface bounding the stitch hole. The device includes a plate which is mounted so that the force-away surface is disposed between the needle and the rotary hook and it is mounted for vertical movement and horizontal oscillatory movement. The actuating means for the device causes a movement of the force-away surface in timed relationship to the reciprocation of the needle and in accordance with the movement of the workpiece in a direction opposite to the movement of the workpiece with respect to the needle and the rotary hook.
A sewing device for producing form seams usable with a sewing machine having a needle which reciprocates in respect to a cooperating rotary hook and which includes a guide mechanism for guiding a workpiece along a path corresponding to the configuration of the form seam with respect to the needle, comprising a workpiece support member having a stitch hole for the passage of the needle and having a force-away surface bounding the stitch hole, mounting means supporting said workpiece support for oscillatory back and forth movement and vertical movement between said needle and said hook, and actuating means connected to said mounting means to move said support member in timed relationship to the reciprocation of said needle and the movement of the workpiece and in a direction opposite to the movement of the workpiece with respect to the needle.
Dependencies are inferred from the claim text.