Abstract: A device for fastening a gripper on a gripper shaft of a textile machine, in particular a sewing machine, preferably a multi-needle sewing machine, with a support element for the gripper is described. The support element for the gripper is connected to a holder or the gripper shaft via a connecting element in such a way that the support element for the gripper is detachable from the holder or the gripper shaft. The connecting element is designed as a toggle screw or locking mechanism such that the toggle screw rotatably engages through a bore in the support element into a corresponding opening in the holder or the gripper shaft, engaging behind an abutment, or the locking mechanism is designed as a positive connection between the support element and the holder.

Abstract: A method for operating a chain stitch sewing machine and a chain stitch sewing machine, the chain stitch sewing machine having a pair of sewing members comprising a needle which pierces a sewing material and a gripper disposed below a sewing material rest, which can be moved along a movement path, where an upper thread is guided with the needle through the sewing material resting on the sewing material rest, which is linked to a lower thread. The lower thread is fed to a retaining element and is held in said element that is moved with regard to its direction of movement and/or speed of movement to the sewing material rest according to a movement path of a pivoting movement of the gripper in particular along a circular-arc-segment-shaped movement path.

Abstract: A multiple needle sewing machine. The sewing machine includes a needle head, a first needle and a second needle both coupled to the head, a drive mechanism, a gripper shaft, and a first gripper hook and a second gripper hook both coupled to the gripper shaft. The drive mechanism is configured to translate the first needle together with the second needle, and to individually translate only one of the first needle or the second needle.

Abstract: The invention relates to a multiple needle sewing machine for sewing large-area sewing material (28) which consists of several layers, at least two layers (6, 15, 21), whereof one layer (15) at least is formed of an elastic material, which multiple needle sewing machine comprises a sewing unit, a supply device for the layers to be sewn together (6, 15, 21), a storage device for withdrawing and storing the sewn layers (6, 15, 21) from the sewing unit, as well as a device which is arranged upstream of the sewing unit and by which the layer (15) made of an elastic material is supplied to the sewing unit in a non-stretched condition or tendentiously in the region of the device in a tendentiously compressed condition, together with said one or said further layers (6, 21), while retaining the compression.

Abstract: The invention relates to a supply device (32) for sewing material layers (16, 18, 20) of a large area sewing product such as mattress panels for example, comprising several sewing material layers (16, 18, 20), particularly at least three, preferably one sewing material layer of elastic material, for example foamed material, and one sewing material layer intended as a top layer, which layers are to be stitched together using a sewing machine (14) with at least one sewing unit, in particular a multiple-needle sewing machine, wherein said supply device consists of at least one roll receiver (34) capable of receiving at least two material rolls (24, 26, 28, 36, 38, 40), each material roll (24, 26, 28, 36, 38, 40) being rotatably supported in a holder (42) of the roll receiver (34), and wherein sewing material layers (16, 18, 20) can be removed from the material rolls (24, 26, 28, 36, 38, 40) arranged in a roll receiver (34) and fed to the sewing unit, wherein the sewing material layers (16, 18, 20) from a roll re

Abstract: A chain stitch or a double chain stitch sewing machine or sewing element of a sewing machine comprising three elements: a needle; a looper; and a spreader improved in such a way that a collision of any two of the elements during the sewing operations will not cause serious damage to the sewing machine and stop periods as a consequence thereof. It is provided that the sewing elements are formed such that at least one sewing element, in particular the spreader, will dodge or break at the predetermined breaking point due to its design and/or material properties.

Abstract: The invention relates to a chain stitch sewing machine comprising stitch-forming sewing elements including at least one needle head (1) and needles (6) arranged on the needle head and at least one gripper shaft and gripper hooks arranged on the gripper shaft, wherein the needles (6) and the gripper hooks respectively form a sewing element pair and are driven in a manner such as to perform preferably chain stitches and especially double chain stitches in a sewing material arranged on a sewing material support, respectively using a needle thread and a gripper thread.

Abstract: The present invention relates to a method for producing a large sewn product, such as a mattress panel or a quilt, having two stitched seams created by a sewing device, moving transversely to the direction of feed, between two adjacently arranged sewn products. The material between said seams is subsequently cut by the sewing unit, located within the sewing device. The apparatus comprises a conveyor mechanism, a sewing device consisting of a sewing unit with at least two needles, a gripper box with grippers allocated to said needles, a tape-like element, a cutting element, and a storage mechanism. By guiding the sewing unit along a first guide means, and by guiding the gripper box along a second guide means, and synchronizing both, material can be cut and sewn on the rim without tension, thereby improving current methods by avoiding sewing inaccuracies and eliminating their subsequent remedies.

Abstract: The invention relates to a chain stitch multi-needle guilting machine with stitch-forming quilting elements and a method for creating a pattern in a guilting material. The elements of the quilting machine are comprised of at least one needle bar with attached needles and at least one looper shaft with attached loopers. Each of the needles and the loopers have a corresponding needle thread and looper thread associated therewith, form quilting element pairs, and are driven to build chain stitches in a quilting material. At least one of the needles is adjustable between two positions and participates in the quilting procedure in a first position and does not prick into the quilting material in the second position during the quilting procedure. The quilting machine can be made to have a device to knot the needle thread with the looper thread, or a device to cut the looper thread, or both.

Abstract: This invention relates to a method of sewing large area sewing material consisting of plural and at least two layers, of which at least one layer is formed of an elastical material, for instance foamed material, wherein said layers are fed to the sewing unit in a superposed relationship and wherein the layer of elastical material is fed to the sewing unit in an unexpanded and preferably bulged condition and is stitched together with the layer formed of non-elastical material. Such a method offers the advantage that the formation of folds in the stitched product is prevented in a simple and inexpensive manner.

Abstract: A sewing machine carries a sewing needle which in turn carries a thread through a stitching aperture of a throat plate beneath which is located a gripper carried by a gripper shaft. The gripper is defined by a gripper neck, a gripper hook and a gripper knee joining the gripper hook and the gripper neck. Located adjacent the gripper bend is a thread-cutting blade. A cam, link and linkage system is provided for selectively driving the gripper shaft to selectively (a) move the gripper (7) a predetermined distance through which the cutting blade is inoperative and (b) move the gripper a further distance beyond the predetermined distance through which the cutting blade is operative to cut-off the thread. A stop boss is also provided adjacent the gripper bend to prevent the thread from being cut during motion of the gripper the predetermined distance.

Abstract: The invention concerns a sewing machine for a large-surface, frame-clamped material.Sewing machines for large-surface materials 39 clamped in a frame 38, 50 are known, wherein the material 39 is held in place in stationary manner in a sewing-machine structure 1, the sewing head together with the gripper box being displaceable longitudinally and transversely and frame-exchanging equipment being provided.In order to create a sewing machine with a much simplified design for the frame-exchanging equipment, the invention proposes that the frame-exchanging equipment be mounted in the vicinity of the sewing-machine structure 1 and comprise a conveyor of such design that following sewing, the frame 38 with the processed material 39 be forced out of the sewing-machine structure 1 and simultaneously the frame 50 with the material to be processed be pulled-in and be moved into the sewing position, and in that the two frames 38, 50 be moved overlapping one with the other during the exchange.

Abstract: A sewing machine for sewing stationary large surface material (13) includes at least two units (14, 16 and 15, 17) of which includes a sewing head (14, 15) and an associated shuttle box (16, 17) which are displaceably mounted for movement in the first (x) and second (y) directions substantially normal to each other. A common drive mechanism (18, 19, etc.) displaces the unit simultaneously in the first direction (x) while spaced a predetermined distance (D) from each other while an associated disengaging mechanism (35) can controllably disengage one of the units (14, 16 or 15, 17) from the common drive (18, 19, etc.) while the other unit is displaced by the common drive to thereby change the predetermined distance (D) after which the one unit is re-engaged.

Abstract: Difficulties are met with when contour-stitching patterns deposited on two-dimensional elastic fabrics because the originally printed or woven-in pattern is significantly warped already during printing or weaving and then during the clamping of the fabric in a clamping frame because of the fabric's elasticity. To make possible automatic contour-stitching, the invention proposes to feed the theroretical dimensional data of the pattern contours together with at least a few prominent sites into a memory of an electronic control for the automatic stitching machine and the actual dimensional data of at least those prominent sites are inputted by means of a computer in such a manner that the theoretical dimensional data are corrected relative to the actual positions of the pattern contours.

Abstract: A device for stabilizing the needle thread loop in the area of the looper in sewing machines and, in particular, in sewing machines having a plurality of needles, is provided wherein a compressed air stream flows substantially transverse to the movement path of the part which contains the needle thread loop. Two compressed air nozzles are provided for each needle which are positioned at the side of the needle facing away from the needle thread loop in such a manner that the compressed air streams meet in the area of the needle thread loop.