DE476194C - Process for the production of a hem with a fold of the base material folded back and forth and a tipped outer edge - Google Patents

Description

Method of making a hem with a back and forth forward fold of base fabric and tipped outer edge The invention refers to a method of making a hem with a back and forth again folded forward fold of the base material and tipped outer edge. The new method is characterized by the fact that the outer edge in one operation of the fabric folded back and forth, trimmed, the bow of the fold raised, the trimmed edge put back under the bow, the bow pushed down and then the hem by means of the bow of the fold and the bow of the fold penetrating seam is sewn. As a result, the stitches that make the folded Connect the edge to the base fabric, not visible on the outside.

The drawing shows an exemplary embodiment.

Fig.i is a cross section showing schematically the fabric as initially folded and the cutting device for trimming the edge is fed.

Fig.2 is the same section with the edge cut off and raised The bow of the base material as preparation for the tipping in of the tipped edge.

Fig. 3 is a similar view in which the bow is bent up even higher and the edge has begun.

Fig.q. is the same cut and shows the folded edge, which lies under the raised bow of the base material. Fig. 5 is a similar section, but shows the parts in their proper position in which the struck Edge lies under the bow of the base material. The edge guide for the parts to be sewn are shown as well as the needle that has penetrated the fabric as well as in dotted lines the @Tädel that descends next to the fabric.

Fig. 6 is a diagram showing the individual stages of formation of the envelope or hem.

Fig. 7 is a diagram showing the parts in their final position are brought (in Fig. 7 is reversed compared to Fig. 6 below with above).

Figure 8 is an enlarged cross-section taken along line 8-8 of Figure 8. 6 (where the bottom is also swapped with the top).

Fig. 9 is an enlarged cross-section taken along line 9-9 of Fig. 7th

The invention is particularly useful for forming the top edges of Stockings or the like. Determined.

In Figs. 7 and 9 the finished object is shown, which consists of the basic material i and a double edge z, io. The edge of the envelope is folded over at ii and united with the base material by stitches 14. These stitches are invisible from the right side of the fabric, which is achieved by the fact that the needle enters and exits the base fabric on the same side without the needle penetrating through the right side of the fabric. This design of the envelope is achieved by the following process: The base material i is turned back on itself at 5 (Fig. I), so that a fold 2 is formed, which is folded again at 6 in the usual way. The free edge is fed to a cutting device 8. This cuts the edge at 9 (Fig. 2), which is then ready to be tipped in. The folded fabric is lifted off with its bow 5 at the lower layer, which is done by guide means which are located in front of the sewing device. The cut edge of the layer of fabric io is also bent upwards, as shown in Fig. 3 and q at ii. This upturned edge is then brought under the raised bow 5 of the fabric, as shown in Fig. Q. shows. As Fig. 5 indicates, the raised bow 5 is then returned to its original position. A guide piece 12 in Fig. 5 then guides the parts so prepared on to the sewing device. A needle 13 penetrates the fabric in the bow 5 of the fold and the bow ii of the fold. As Fig. 8 shows, the path xx of the needle lies at the very edge of the fabric layers and thus guides a thread in and out of the same side of the workpiece. In this way the needle does not penetrate the outside of the finished piece, so that on the right-hand side, when the pieces are in the final position shown in Fig. 9, stitches will not be visible. On the next stroke, the needle passes the fabric as shown in dotted lines in Fig. 5. As the needle descends through the fabric, a loop of thread is laid through the fabric, and when the needle descends next to the edge of the fabric, a loop 15 is formed outside the fabric. These loops are chained in the usual way and are only shown schematically in Figs. 6, 8 and 9. The paragraph shown in Fig. 9 for the sake of clarity between parts i and 2 of the layer of fabric drawn at the bottom disappears, in reality, and, as the figure shows, no stitches can be seen on the underside of this layer of fabric.

The most important thing about this type of production is that it progresses Trimming the edge of the folded envelope, the progressive lifting of the Fabric at the folding point and the gradual folding in of the edge and its Lay it under the raised part of the fabric. Furthermore, putting back the raised Piece of fabric in the usual position and sewing together the folded parts Stitches that cannot be seen on the outside, including the trimming edge is covered.

It is advisable to use one to produce the seam needle swinging back and forth transversely to the sewing direction, however, the invention can also be used for sewing together without an overlock seam.

Claims (1)

PATENT CLAIM: Process for the production of a hem with a ' folded back and forward fold of the base material and tipped Outer edge, characterized in that the outer edge. (9) of the folded back and forward again, the bow (5) of the Fold raised, the trimmed cart (ii) put back under the bow (5), the Bow (5) pressed down and then the hem by means of a bow (5) of the fold and the bow (r z) of the penetrating seam is sewn.