Abstract: A sewing-material workpiece holder for holding and positioning the sewing part. The workpiece holder is movable in the longitudinal direction of the sewing-machine arm and also in a direction transverse thereto. The holder is connected in form-locked manner via a toothed drive to a carrier. The toothed drive includes a toothed drive member mounted on the carrier, and a rack which is mounted on the sewing-material holder, the rack being in engagement with the toothed drive member when the workpiece holder is mounted on the carrier. The drive member is driven by at least one motor. The holder is locked to the carrier by a guide block or clamp which is swingably mounted on the carrier and swingable into a lower, locking position. A predetermined positional association of the sewing-material holder with the carrier is made possible by an alignment device on the carrier.

Abstract: A sewing device having a sewing head including a rotary housing and a control device for controlling the rotary movement of the housing and for generating a two-axis-relative movement between the workpiece to be sewn and the rotary housing. The latter is tiltable about the needle axis and pivoted by means of a hollow shaft. Within the rotary housing there are arranged a needle bar with a needle reciprocatingly driven by a crank, a thread take-up lever for handling a needle thread and drive means for operably moving up and downwardly a presser foot and occasionally a thread tensioner. In order to supply the required drive means inside of the rotary housing with energy without obstruction of the rotatability of the rotary housing there is provided a rotary coupling concentrically arranged with respect to the hollow shaft, at which the rotary coupling is also formed with an coaxial bore for the needle thread.

Abstract: A guide template for sewing machines in which a driven roller follows along the template's contour to sew workpieces of different form and/or size. The template has a number of sections which are movable relative to one another. For purposes of lengthening one of these template sections, a second movable and adjustable template section is provided in combination with a third template section which is pivotably mounted on the second template section. The third template section may be adjusted to different contours by an adjustment device. This adjustment device has a cam plate interacting with the third template section, and mounted rotatably on the machine frame through the use of a handwheel. The second template section is located between the first and third template sections, and is used to extend the template. The second template section is held by a gear rack on a plate on the machine frame, and the gear rack engages a pinion which is rotatable with an adjustment knob for shifting on the gear rack.

Abstract: A workpiece holder for sewing machines in which a plurality of supporting segments are located next to one another and are displaceable relative to each other. These supporting segments have a rim zone at which needles are located. The rim zone, furthermore, supports the edge of a workpiece to be processed. A device which may be lowered onto the workpiece, cooperates with the needles for holding the workpiece on the needle. A contour adjusting device is provided with templates for shifting the supporting segments. The templates have a contour corresponding to the seam to be applied to the workpiece. The supporting segments are, moreover, formed by rails having a U-shaped cross-section with cross bars carrying the workpiece and having recesses for permitting passage of the needles. The latter are arranged on a two-arm lever rotatably supported in each of the supporting segments, and they are held in a position permitting passage through the supporting segments within the recess by means of a spring.

Abstract: A template control for relative movement between a workpiece or material and a tool which may be in the form of a needle on processing machines. The template is adjustable to different shape and/or size of a workpiece which may be in the form of a garment. A roller is pressed against the template which is provided with a coaxially located and driven gear pinion. The pinion meshes with teeth adaptable to the shape of the template for purposes of guiding the roller without slippage along the template. The latter has an elastic tape which determines the shape of the contour. The tape is held in a number of tape carriers arranged displaceably next to one another and parallel to one another. Displaceable tooth segments under tension of a spring, are associated with the tape carriers. These tooth segments when located next to one another, form a gear rack with identical toothing.