Abstract: A sewing machine is described with a sewing needle drive (4) and a forward feed drive for the garment, comprising a continuous rotational drive (9), a belt conveyor (7) for the garment and an intermediate drive (10) with two gearwheels disposed between the rotational drive (9) and the belt conveyor (7), of which the gearwheel on the driven side can be twisted relative to the one on the drive side with over-feed or underfeed by means of a control lever (14) driven by an eccentric drive (15) depending on the sewing needle drive (4). In order to provide advantageous construction conditions it is proposed that the two gearwheels are arranged as mutually combing gearwheels (11, 12), of which the one on the driven side is held in a fixed link (13) rotationally held about the axis of the gearwheel (11) on the drive side, on which the control lever (14) acts.

Abstract: The invention relates to a chain stitch sewing machine (1) having a needle bar (5) mounted in a housing (4) in such a way that it can be lifted and driven and at least one sewing needle (7, 8) that can be fixed on the needle head (6) of the needle bar (5), to which a sewing thread (12, 13) can be fed from a thread spool (14) by means of a tightener (15) and a thread guiding device (16), wherein the thread guiding device (16) comprises a thread takeup (17) controlling thread tension depending on the lift of the needle bar.

Abstract: A needle plate for a two-needle interlock sewing machine for sewing a chain stitch seam of three threads, comprising two needle holes and one stitch tongue originating between the two needle holes and extending forward in a feed direction, thereby leaving open thread guiding slots along opposite sides thereof, characterized in that the thread guiding slots are covered in a needle stitching direction by marginal steps on the side of the needle plate except for thread outlet gaps open towards the bottom surface of the stitch tongue, where preferably the marginal steps form a support for the material to be sewn at their upper surface, each marginal step having a take-up ramp in the area of the thread guiding slots subsequent to the needle holes.

Abstract: A drive means for feeding a material to be sewn on a sewing machine (1) includes a feed dog (7) to be coupled to a continuous rotary drive (9) via at least one intermediate drive. To achieve optimum drive conditions in a comparatively simple way, the intermediate drive consists of a belt drive (10) with a belt (13) circulating around a drive wheel (11) and a driven wheel (12), where the belt (13) having an excess length is guided over a control roller (14) at the working portion thereof (131) and over a tension roller (15) at the return portion (132) thereof, and the control roller (14) and the tension roller (15) are mounted so as to be periodically reciprocated in the sense of a release or deflection of the belt (13) for decelerating, stopping and accelerating the rotation of the driven wheel, and the driven wheel (12) is in rotary connection with a feed dog (7) designed as circular conveyor, in particular as conveyor belt (20).

Abstract: An attachment (4) for sewing machines (1) for trimming the material to be sewn has a cutting tool comprising a blade (5) and a counter blade (6), which can be driven in dependence on the intermittent feed of the material to be sewn, and whose cutting plane (S) is aligned parallel to the feed. To achieve an inexpensive, space-saving and safe cutting of the material to be sewn, the cutting tool has a rotary blade (5) to be driven around an axis of rotation (D) normal to the cutting plane (S), which forms at least one cutting edge (7) extending only over part of the blade periphery and along its course deviates from a circular arc around the axis of rotation (D), and which rotates with a number of revolutions adapted to the feed of the material to be sewn indirectly proportional to the number of cutting edges.

Abstract: An auxiliary device (6) for sewing up the starting end of a thread chain (F) in a chain stitch sewing machine (1) having a platform (2), a needle plate (3) and an edge cutter (4) comprises a suction and separating device (5) disposed subsequent to the needle plate (3) in sewing direction (N) for taking in and cutting off the thread chain (F) upon sewing a workpiece, a returning device for turning round the remaining end piece of the thread chain against the sewing direction (N), and a clamping and deflecting device disposed before the needle plate (3) in sewing direction for retaining the end piece of the thread chain turned round, and for laterally deflecting the same into the cutting area of the edge cutter (4).

Abstract: An automatic unloading and stacking apparatus and method for automatic unloading and stacking tubular articles from a circular sewing system. The system includes a mechanism for clamping and removing sewn garments from a circular sewing station that does not interfere with an operator's ability to access the sewing station. Once removed from the sewing machine, the sewn garments are then stacked in a remote location allowing an operator to load the next garment to be sewn.

Abstract: An automated circular sewing machine system for attaching an elastic band to a tubular body of fabric or simply forming and sewing a hem thereon. The system includes, among other things, a sewing head which is located between a pair of elongated work holding roller assemblies which project outwardly on either side of the sewing head. The roller assemblies include a front or feed side roller assembly and a rear or drive and tensioning roller assembly. The front roller assembly is free wheeling and is fixed in position relative to the sewing head. The drive and tensioning roller assembly includes a movable drive and tensioning roller driven by a motor and consisting of a solid unitary member which is generally cylindrical with a rounded outer nose portion and an inner fabric support surface. The entire drive and tensioning roller assembly is pre-positioned by a laterally movable clamping plate assembly to a fixed position relative to the sewing head depending on the size of the tubular body being sewn.

Abstract: An automated circular sewing machine system for attaching an elastic band to a tubular body of fabric or forming and sewing a hem thereon without the elastic band. The system includes a sewing head which is located between a pair of elongated work holding roller assemblies which project outwardly on either side of the sewing head. The roller assemblies include a front or feed side rolling assembly and a rear or drive and tensioning roller assembly. The front roller assembly is free wheeling and is fixed in position relative to the sewing head while the rear roller assembly includes a motor driven drive and tensioning roller. The front roller assembly is a split roller assembly consisting of a pair of mutually aligned and free wheeling roller sections, with the outer section being preferably tapered, while the inner section is flanged for receiving and holding the elastic band in place thereon.

Abstract: An apparatus for feeding a workpiece in a machine tool, particularly in a sewing machine, comprises a main conveyor for longitudinally conveying the workpiece in a feeding direction and an auxiliary conveyor for transversely conveying the workpiece to align the same, which auxiliary conveyor comprises a conveying mechanism, which precedes or succeeds the main conveyor and is engageable with the workpiece as it is guided along a guideway and comprises conveying elements which are adapted to be driven to move transversely to the feeding direction.

Abstract: A button-sewing machine (1) comprises a needlebar frame (6), which is suspended like a pendulum and connected to a rocking linkage (8). A button-holding clamp (5) is tiltably mounted in a stand (4), which is carried by a base plate (3), which is mounted on the machine base (2) and longitudinally displaceable relative to said machine base and longitudinally reciprocable by an actuating head (9). The latter is operatively connected to the main shaft of the machine.The machine can be used to perform several different working programs without an alteration of the machine. For this purpose the stand (4) is transversely movable relative to the baseplate (3) or the baseplate (3) is adapted to perform relative to the machine base (2) not only a longitudinal displacement but also a transverse angular movement. A coupling element (19) is provided, which is operable to selectively couple the actuating head (9) either to the baseplate (3) or to the rocking linkage (8) of the needlebar frame (6).