Abstract: A snap-on darning and embroidery plate, provided for use in conjunction with a needle plate on a sewing machine to render the work feeding mechanism ineffective, is constructed of plastic and structured to provide a spreading action between locating pins thereon when inserted in holes in the needle plate.

Abstract: 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.

Abstract: A throat plate holding the feed dog of a twin-needle sewing machine has formed therein a pair of parallel spaced guide channels for slidably accommodating respective scoop-carrying edges of the pair of concealed fastener stringer tapes as they are stitched onto a fabric. When seen in a cross section, the guide channels diverge downwardly to prevent accidental disengagement of the scoop-carrying edges of the stringer tapes therefrom.