Verfahren zum kontrollierten Zusammennaehen wenigstens zweier biegeschlaffer Teile und Vorrichtung zur Durchfuehrung des Verfahrens

In order to sew together two non-rigid parts, in particular textile or similar materials in the prescribed and preferred manner, whereby either a precise plain sew or the specific introduction of more width can be supported, a process and a device for performing said process are proposed. The main characteristic of the device for performing the process according to the invention is the basic concept that, using an upper sensor (18) and a lower sensor (19), the reverse edge (16) of the upper material (8) and the reverse edge (17) of the lower material (7) are kept under constant supervision during the entire sewing process. In plain sewing, the two edges must always lie with about identical coverage during the entire sewing process or must have a constant spacing. In this example, an edge becomes displaced compared with the other edge in the feed direction of sewing (12), a suitable control in conjunction with the signal from the sensors (18, 19) ensures a displacement of at least the a ffected material shifter (2 or 3) so that the identical coverage of the two edges is restored or the distance is restored. If more width is to be introduced, the control ensures that the displaced edges (16, 17) in the original sewing feed direction (12) are restored to an identical coverage position or to a ... within a specified period of time or sewing distance ...