Durkopp Adler Aktiengesellschaft

Michael Klein

Ole Wennerberg Nielsen

Benny Lapp

In addition to a sewing machine, a sewing unit has a workpiece holder, which has two workpiece bearing plates displaceable relative to each other, a holding bar, a folding, bar, a thrower device, a cloth slider and a folding device. By these devices, first and second trouser parts having rim strips are faced and overlapped inside-out onto a zipper. The front inseam is sewn, then the rim strip of the second trouser part is folded over and a first zipper seam is sewn. The second trouser part is folded over right-side out and the j-seam is sewn. The rim strips of the first and second trouser parts can be folded before sewing, seam locks can be provided, and a lower covering strip can be provided to the zipper as well. Thus, all three seams can be sewn with a single sewing arrangement.

Manipulating and sewing two trouser portions having rim strips to a

A zip-fastener feeding device for an automatic sewing unit comprises an introduction device, an endless drawing means guided via a drive wheel and via deflection pulleys and a guiding device. Zip fasteners can be introduced through the introduction device by means of the drawing means by at least one guiding channel of the guiding device onto a workpiece retaining plate or a zip-fastener retainer provided in the latter and these zip fasteners can be precisely positioned there.

Endless belt zipper feed with sensors for a sewing machine

A rotatably mounted needle plate (30) in the form of a cylindrical sleeve is provided for a sewing machine (1) with which seams can be produced as a result of a relative movement between the sewing machine (1) and a cloth holder (68). The needle plate (30) has at least one needle-plate attachment (37) and at least two needle holes (38, 38'), a longitudinal axis (39) of each needle hole (38, 38') being radial to an axis of rotation (40) of the needle plate (30). The needle-plate attachment (37) provides cloth resting surfaces (41) surrounding each needle hole (38, 38') which are at different distances from the axis of rotation (40). By rotating the needle plate (30) there is obtained an adjustment of the sewing level, as a result of which it is assured that the lower side of the cloth will dependably rest on the cloth resting surfaces (41) during the sewing even when the cloth has partially thick regions within the course of the seam. Since both round and slot-shaped needle holes (38, 38') are provided in the needle plate (30) and the cloth resting surfaces (41) of these needle holes (38, 38') are at equal distances from the axis of rotation (40), then different types of stitches (straight stitch or zig-zag stitch) can be present within the same seam.

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Bielefeld, Germany

Michael Klein