Abstract: An automatic sewing machine comprises a stand, on which a workpiece guide and feed device is mounted. This device substantially comprises an x carriage, a y carriage displaceable thereon and a lever with a workpiece holder for the displacement of workpieces on a workpiece receiving plate. The y carriage is drivable by a drive stationary on the stand by way of a shaft which is likewise stationary on the stand and passes though the x carriage. A drive for the y carriage is supported on the shaft by means of a torque/linear bearing. Driving the shaft takes place in proximity to the sewing head and at a distance from an auxiliary station so that inaccuracies of guidance occasioned by torsion of the shaft are minimized during the sewing operation.

Abstract: For the purpose of attaching a strip of cloth provided with a zip-fastener component to a trouser forepart, first a rim of the strip of cloth and then the rim of the trouser forepart are folded over. The strip of cloth is arranged above the trouser forepart. Both folded-over rims are brought into a position relative to each other which they occupy after being joined together. Then they are brought into mutual contact and joined together with only a single seam in only one sewing operation. Thus very simple handling of the parts to be sewn together is achieved along with a very simple design of the required sewing units.

Abstract: For the purpose of attaching a strip of cloth provided with a zip-fastener component to a trouser forepart, first a rim of the strip of cloth and then the rim of the trouser forepart are folded over. The strip of cloth is arranged above the trouser forepart. Both folded-over rims are brought into a position relative to each other which they occupy after being joined together. Then they are brought into mutual contact and joined together with only a single seam in only one sewing operation. Thus very simple handling of the parts to be sewn together is achieved along with a very simple design of the required sewing units.

Abstract: In an automatic sewing device the sewing head has, for producing a tangential path of the needle relative to the seam to be produced, a rotary housing which receives the needle bar and a likewise rotatable hook bearing which receives the hook and which can be tilt driven by an adjusting shaft at the same angle of rotation as the rotary housing. A drive shaft is provided for driving the needle bar and the hook. To enable even pivoting movements of the rotary housing in a simple embodiment without a change in the height of the needle bar occurring, there are provided a device for the drive-like connection of the adjusting shaft and the drive shaft and a device for the disengagement of the drive motor from the drive shaft.

Abstract: An automatic sewing machine has two feeding devices, each having a workpiece holder, each of which, when in a sewing position, can be raised up into a position some distance above a carrier plate and, at this distance above the carrier plate, can be moved over the other workpiece holder situated on the carrier plate to a transfer position. The purpose of these measures is to minimize the cycle time with the lowest possible expense and to increase the output of the automatic sewing machine as much as possible while largely avoiding idling paths.

Abstract: An automatic sewing machine has a guiding device by means of which workpieces can be guided, on the one hand, from a taking over position to a sewing position under a sewing head and, on the other hand, under this sewing head in two coordinate directions. To enable the handling of large workpieces in the case of a particularly simple design, the whole guiding device is arranged above a workpiece receiving plate for the workpieces, a free space for large workpieces being provided on the side of the workpiece receiving plate lying opposite an operator's side.

Abstract: In a sewing device for sewing fabric cuts on workpiece parts, which are moved by means of a workpiece clamping plate relatively to the needle of a sewing machine, a tiltably arranged and easily accessible vertical axis rotary looptaker for allowing replenishment of thread supply.