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 pulling device is configured to grip, after cutting of a sewing material, a suitable portion of the sewing material by means of a grip member, where a leading end portion of the sewing material having been pulled out from a guide device, and pull back the sewing material by movement of the grip member having the sewing material gripped thereby. Thus, the leading end portion of the sewing material, pulled out and extending from the guide device more than necessary, can be minimized to a length necessary for the sewing material to be reliably sewn onto a sewing object at an initial stage of a next sewing operation. In this way, it is possible to minimize a length of a portion of the sewing material that was heretofore wasted without being sewn onto the sewing object.

Abstract: A multi-needle sewing machine includes needle bars, presser feet, a support member configured to support the needle bars such that the needle bars can move up and down, a cutting member, a guide member configured to move between an extended position and a stand-by position, and a holding member configured to hold an end portion of a upper thread, the holding member including a fixed member that is mounted to the support member, movable members each of which is provided for one of the needle bars, and includes a guide portion formed by cutting a notch in an outer end portion on the needle bar side of the movable member, and elastic members each of which is provided for one of the movable members and configured to elastically energize the one of the movable members toward the fixed member.

Abstract: The activation for a path and time related motion of a thread cutting and lead-in stitching unit (7) and the thread brake (25) occurs by a cam drive driven by the primary shaft (9) and a cam drum (75) arranged on the upper shaft (17). This way, an absolute synchronization of the elements of the thread cutting and lead-in stitching unit (7), the thread brake (25), and the hook as well as the needle is ensured.

Abstract: An airbag (10) has a vent hole (18) in one side end portion. One end of a third base fabric (20) is sewn to the airbag (10) through a first sewn portion (23) that closes the vent hole (18), and the other end of the third base fabric 20 is sewn to the other side end portion of the airbag (10) through a second sewn portion (24). The first sewn portion (23) has weaker binding force by sewing than the second sewn portion (24) so that the first sewn portion (23) is separated to open the vent hole (18) when tension force is applied from the third base fabric (20) to the first and second sewn portions (23) and (24).

Abstract: A sewing machine capable of embroidery sewing includes a plurality types of embroidery frames which hold a workpiece cloth; a carriage that has the embroidery frame detachably attached thereto by sliding the embroidery frame in a predetermined direction; a frame moving unit that moves the carriage in two directions intersecting in a horizontal plane; a control unit that controls the frame moving unit; a detection that detects a type of embroidery frame attached to the carriage; an operation instructing portion that allows a user to instruct movement of the embroidery frame to a predetermined position suitable for attachment/detachment of the embroidery frame, the operation instructing portion outputting a movement instructing signal to the control unit when operated; and a validating unit that validates operation of the operation instructing portion provided that an attachment of a specific type of embroidery frame is detected by the detection mechanism.

Abstract: The thread cutting device of a sewing machine provides a first thread catching member having a first thread catching portion for catching a thread positioned between the horizontal shuttle and the needle hole and carrying out forward and backward movements below the throat plate while the first thread catching portion catches the thread, a second thread catching member having a second thread catching portion for catching the thread laid between the needle hole and the first thread catching portion and guiding the thread caught by the first thread catching member to a fixed blade and to cut the thread by the fixed blade.

Abstract: Intended is to always provide effective impact reduction by releasing gas at a timing of pushing into airbag. An airbag (10) has a vent hole (18) in one side end portion. One end of a third base fabric (20) is sewn to the airbag (10) through a first sewn portion (23) that closes the vent hole (18), and the other end of the third base fabric 20 is sewn to the other side end portion of the airbag (10) through a second sewn portion (24). The first sewn portion (23) has weaker binding force by sewing than the second sewn portion (24) so that the first sewn portion (23) is separated to open the vent hole (18) when tension force is applied from the third base fabric (20) to the first and second sewn portions (23) and (24).

Abstract: A sewing machine includes upper and lower beams. A thread hooking mechanism is mounted in the lower beam. A needle plate base is mounted to an end of the lower beam. A transmission shaft rotatably extends in the lower beam and has an end extending into the needle plate base. The transmission shaft can be driven by a power source. A driving device is mounted to the end of the lower beam and includes a transmission shaft rotatably received in the needle base plate, a transmission gear fixed on the end of the transmission shaft, a driven shaft rotatably received in the needle base plate and having an end coupled to the thread hooking mechanism, and a driven gear fixed on the driven shaft and connected to the transmission gear, with the driven shaft and the thread hooking mechanism rotating at a speed higher than the transmission shaft.

Abstract: A stationary thread-cutting device for a sewing machine includes a guiding member and a cutter. The guiding member is mounted on a needle plate, and has a major wall defining a thread guiding route. The guiding route includes a lead-in area having an entry slot to permit entry of a leading end of a bobbin thread, a turn-around area for guiding the leading end, a corner piece disposed at the turn-around area, and a cutting station disposed adjacent to a lateral edge of the needle plate to define a lead-out path with the corner piece. The cutter is disposed under the major wall and adjacent to the cutting station, and has a cutting blade. After the bobbin thread is advanced beyond the cutting station, the bobbin thread is cut, thereby ensuring that a predetermined length of the bobbin thread is available for initial interlacing with a needle thread in a sewing operation.

Abstract: In a sewing machine having an automatic thread cutting mechanism, a situation of a thread cutting operation is detected in power-OFF to continuously carry out a proper operation when a power supply is turned ON again after sudden power-OFF. In a sewing machine having an automatic thread cutting mechanism, there is provided means for detecting an operation situation of the automatic thread cutting mechanism when a power supply is turned ON. Based on a signal for the detection, the automatic thread cutting mechanism is operated to complete a thread cutting operation and to carry out a control to return into an initial state when a stop is performed with the thread cutting mechanism in power-ON executing the thread cutting work.

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: A sewing machine having a threading path defined at a sewing machine head and being engaged with a needle thread to guide the needle thread in threading a sewing needle; a thread holder provided on the threading path and that includes a thread holding plate receiving the needle thread being introduced from outer to inner peripheral side of the thread holder to clamp the needle thread; a thread cutter provided on a faceplate covering the head and that cuts off a needle thread tip sequentially engaged with the threading path; a threader unit that passes the needle thread through a needle eye; and a passage resistance applier provided downstream relative to the thread holder and upstream relative to the thread cutter and that applies a predetermined amount of resistance on the needle thread passing therethrough to introduce the needle thread to the inner peripheral side of the needle holding plate.

Abstract: In a presser foot and a sewing machine according to the present invention, a guide hole is formed in a presser leg to which a fixed knife is attached, so as to passing through the presser leg up and down, and a knife holder is fitted and held to the guide hole. The fixed knife is inserted to a retention groove provided in a peripheral surface of the knife holder through a window hole provided in the presser leg, and is fixed by fastening a stop screw. A position of the fixed knife is adjusted in a vertical direction by moving the knife holder in the vertical direction along the guide hole and fastening the stop screw at an appropriate position, thereby changing a cut position of ends of fabrics and changing an overlapped width of the fabrics at a time of seaming.

Abstract: A sewing thread spool having thread locking and cutting functions is disclosed. The sewing thread spool comprises a winding core having an outer rim at one end and a bobbin at one end of the core, with a thread cutting plate arranged on an end plane of the bobbin. The bobbin comprises a thread-passing notch arranged at the end with the thread cutting plate. The thread cutting plate comprises a first and a second bayonet sockets separated from each other, the first bayonet socket cooperating with the thread-passing notch to produce a tension in a thread, and the second bayonet socket being used for cutting the thread and fixing the thread end. The thread spool is beneficial in that it cuts the thread and locks it to the spool.

Abstract: A thread cutting device of a sewing machine is provided. The thread cutting device cuts a thread extending between a horizontal shuttle and a throat plate of the sewing machine. The thread cutting device includes a fixed blade, a first thread catcher, a second thread catcher, a driving assembly which moves the first and second thread catchers such that the first thread catcher catches the thread before the second thread catcher catches the thread and pulls the thread toward the fixed blade to cut the thread, and a guide member disposed between the first thread catcher and the driving assembly. The guide member guides the first thread catcher from an advanced position to a thread catching position to catch the thread, and further guides the first thread catcher from the thread catching position to a standby position to turn the first thread catcher toward the fixed blade.

Abstract: One embodiment of the present invention relates to a system for thread handling (e.g., separating) and/or cutting. Another embodiment of the present invention relates to a method for thread handling (e.g., separating) and/or cutting. In one example, the present invention may be used in connection with sewing machines, embroidery machines, quilting machines and the like.

Abstract: A system, apparatus and method for stitching are described. One embodiment includes a sewing head including a needle; an arm assembly that is disposed relative to the sewing head so as to allow a garment to be placed between the sewing head and the arm assembly; and a non-planer needle plate coupled to the arm assembly that includes an aperture that is disposed so as to allow the needle to project through the aperture after the needle has moved through the garment.

Abstract: A thread cutting device of a sewing machine cuts a thread below a throat plate through which a needle is inserted. The thread cutting device includes a first thread catcher operable to catch the thread, a second thread catcher operable to catch the thread caught by the first thread catcher, a fixed blade operable to cut the thread caught by the second thread catcher, a driving portion which drives the first thread catcher and the second thread catcher such that the second thread catcher catches the thread caught by the first thread catcher and guides the thread toward the fixed blade, an attaching member to which the fixed blade is fixed and into which the second thread catcher is slidably inserted from above over the fixed blade, and a cover which covers the second thread catcher from above to restrict an upward movement of the second thread catcher.

Abstract: The present invention relates to a method and an apparatus for operating a thread-processing machine having a thread-cutting device. In order to provide a method and a corresponding apparatus for operating a thread-processing machine having a thread-cutting device, which achieves improved results with increased operational reliability in comparison with known apparatuses and methods, it is proposed that the processed product (3) is covered with an articulated or flexible protective element to protect the surface of the sewn product in a region around a thread (2) which is to be severed only after the thread-processing operation is ended, and the thread-cutting device (4) is moved onto a cutting point and is positioned for cutting relative to the protective element.

Abstract: The thread cutting device of a sewing machine provides a first thread catching member having a first thread catching portion for catching a thread positioned between the horizontal shuttle and the needle hole and carrying out forward and backward movements below the throat plate while the first thread catching portion catches the thread, a second thread catching member having a second thread catching portion for catching the thread laid between the needle hole and the first thread catching portion and guiding the thread caught by the first thread catching member to a fixed blade and to cut the thread by the fixed blade

Abstract: A thread cutting device includes a thread catching member having a catching portion, wherein the thread catching member moves back and forth across a path of a lower thread reeled out from a bobbin so as to catch the lower thread by the catching portion and cuts the lower thread by cooperating with a fixed knife, a first power transmitting portion which transmits a power to the thread catching member, a first cam member provided on a lower shaft rotated by a sewing machine motor and transmits a first moving force to the thread catching member through the first power transmitting portion, a second power transmitting portion which transmits a second moving force from a stepping motor to the thread catching member through the first power transmitting portion.

Abstract: Disclosed is an automatic thread cutting device for a sewing machine which is provided with a horizontal loop taker, wherein a thread catching member (4) is operated in response to a thread cutting instruction to reciprocatingly move with a movable blade (5) along a predetermined course, the thread catching member (4) normally catching the upper thread when moving in the return-way of reciprocation to guide the upper thread to a fixed blade (14) which is provided to cut the upper thread in cooperation with the movable blade (5), and wherein a thread regulating means is provided to cut the lower thread (29d) together with the upper thread, the thread regulating means being operated to press down the lower thread (29d) to a position where the lower thread (29d) is caught by the thread catching member (4) in addition to the upper thread when the thread catching member (4) is moving in the return-way of reciprocation.

Abstract: The present invention is an automatic thread cutting device for a sewing machine, which is equipped with an automatic thread cutting device on the position that a needle thread passes through. The automatic thread cutting device comprises a main body that is equipped with a worm gear rod of active piece actuated by a motor of driving piece, wherein the active piece is engaged with a worm gear denture of passive piece that motivates a thread hooking member, a knife base with a knife is fixed on the main body and cooperates with the thread hooking member to cut a needle thread. Thus the size of the whole device can be minimized effectively to fit in the small space of a sewing machine, and then the objective of effort-saving and fast thread cutting is attained.

Abstract: The present invention provides a cordless device for removing a single layer of stitches from a fabric. The cordless device comprising a body having a top end and a bottom end. At the top end of the body is a blade having a plurality of upper teeth and a plurality of lower teeth for cutting the layer of stitches to be removed from the fabric. Inside of the body is a high powered motor for actuating the blade in a back and forth motion across the layer of stitches being cut. A cordless power source, such as a battery, is positioned inside the body to provide power to the motor.

Abstract: A sewing machine includes a head on which a needle bar for fixing a needle is mounted, a thread cutting blade mounted in the head so as to be capable of cutting an end of a thread which is threaded so as to be passed through an eye of the needle, and a holder mounted in the head so as to be capable of holding the thread end after the thread end has been cut by the thread cutting blade. The thread cutting blade is positioned so that a first amount of thread from the eye of the needle mounted in the head to the thread end held by the holder equals a second amount of thread by which the thread end is drawn to an underside of a cloth in a stitch formed immediately after start of a sewing operation.

Abstract: A sewing machine includes a needle plate having a needle hole through which a sewing needle is allowed to pass, a thread catcher reciprocally moved forward and backward below the needle plate and being elongated in a moving direction, the thread catcher having a frontward end with respect to a direction of forward movement of the thread catcher and including first and second generally hook-shaped catching portions, and a cutting blade located between the first and second catching portions at least during backward movement of the thread catcher to cut a thread caught between the first and second catching portions. The first catching portion is located nearer to the frontward end of the thread catcher than the second catching portion with respect to the moving direction of the thread catcher during forward movement of the thread catcher.

Abstract: A thread cutter for use in a sewing machine with a rotating hook (12) has a surface cam (60) which, together with a cam follower (58), controls the movement path of a pivotable thread catcher lever (26), which grasps the thread with a thread catcher (30, 36) and severs it at a cutter (82). With known solutions the surface cam is seated on the main shaft of the machine, which results in space-consuming structures with a large amount of parts. It is therefore proposed to connect the surface cam (60) in a torsion-proof manner with the hook (12) and to provide arresting means (38) which, only during a revolution of the hook (12) with the needle raised, maintain the thread catcher lever (26) radially outside the engagement range of the surface cam (60) and only with definite triggering release the thread catcher lever (26) with a cam follower (58) for contact with the surface cam (60).

Abstract: A sewing apparatus includes a thread cutting mechanism that cuts a thread connected to a work cloth. In response to an operation of an operating member and detachment of a sewing cartridge from a sewing apparatus body, the thread cutting mechanism is actuated. The thread cutting mechanism includes a thread cutting lever, a link mechanism, cutting blades, and an engagement mechanism.

Abstract: The invention relates to a process and a device for adjusting clearing limits, defects in the yarn being cut out and a clearing limit separating defects which are to be cut out from defects which are not to be cut out. To achieve an improved, simplified and rapid adjustment of the clearing limit so the effect thereof in the end product can also be predicted more accurately, starting from the clearing limit, displays of defects in the end product are to be produced which make an effect of the defects in the end product visible.

Abstract: A new Sock Clip System for securing stocking, socks, and hose and the like, into their proper pairs for ease of sorting for laundry and storage. The inventive device includes a clip inserting mechanism having a handle for inserting a resilient clip into clothing, a slot projected into the handle, and a blade secured within the slot within the handle for cutting the resilient clip preparing the secured clothing for utilization. In an alternative embodiment, the blade may be removably secured to the handle by a U-shaped member having a flange with slidably projects into a T-slot within the handle.

Abstract: A thread cutting device of a sewing machine comprising a groove defined in a sewing machine, the groove extending back and forth and having an opening at a back end thereof, a plurality of thread cutting blades having inclined grooves along which each piece of thread cutting blades can be broken off every given interval, wherein a tip end of each thread cutting blade is disposed to across an intermediate portion of the groove, and the each thread cutting blade is fixed to the sewing machine by way of a detachable fixing means.

Abstract: A method for manufacturing hosiery items, termed "top-to-top" method, and the related modified knitting and stitching machines. The method includes the following steps: knitting a first hosiery item starting from a top down to a toe; knitting at least one row of trim at the end of the toe; knitting a second hosiery item at the end of the row of trim starting from a second toe up to a second top; separating and stitching the first and second hosiery items initially joined by the trim row by means of a specifically modified stitching machine. The stitching machine includes two independent stitching units which are fed by a common conveyor which is provided with a cutter and with diverging traction means. Top-to-top knitting can be performed with appropriately modified mechanically-programmed machines or with electronically programmed machines.

Abstract: A thread cutting unit cooperating with the bed of a sewing machine includes a lower shaft, a cutting knife and a loop spreading plate respectively fixed to the lower shaft and positioned adjacent to the hook. The thread cutting knife and the loop spreading plate cross each other in a space between the hook and the throat plate. The thread cutting unit is provided with a thread cutting driving unit which comprises a thread cutting knife driving shaft, a loop spreading plate driving shaft, a rotational motion transmission device, a thread cutting supporting member carrying thread cutting knife, a first turnable interlocking mechanism and a second turnable interlocking mechanism. The thread cutting supporting member is rotatably supported on the bed.

Abstract: A thread-cutting device for zigzag sewing machines for forming uniformly short thread ends regardless of the top stitch position of the last stitch. The thread cutter 28 is movable in a plane that is parallel to the thread catcher 33 and is connected by a drive unit 45 through 58 having stop sections 54, 55 to the drive of the thread catcher 33 such that the thread catcher can be moved, together with the cutter, into the cutting position located below the center of the stitch hole. While the thread cutter 28 stops in the cutting position, the thread catcher completes the thread separation process. The thread cutter 28 is moved back during the return movement of the thread catcher 33 only after the threads have been cut. The drive unit 45 through 58 for the thread cutter 28 is of positive-locking design, as a result of which even thick threads are cut reliably. The thread cutting device is particularly suitabloe for installation (even subsequent installation) in stitch group zigzag sewing machines.

Abstract: The filament cutter comprises a shank (1) with a head (2) and a substantially cylindrical portion (4), applied against the head (2) by a spring (5). In the space (7,8) is disposed a cutting member (9), having notched recesses and so arranged that a filament engaged between the member (4) and the head (2) will come into engagement with the notches so as to be cut.

Abstract: A tape feeding device comprises a binder arrangement for bending shape tape so that the bent portion thereof extends longitudinally. The binder includes a first binder for guiding a base of the tape and a second binder for bending the tape in a predetermined shape while guiding a tip end of the tape. A cutting unit is disposed between the first and the second binders to cut the tape. A tape feeding mechanism feeds the tape from the first binder to the second binder after the tape is cut by the cutting unit.

Abstract: A sewing machine capable of simulating hand stitching. The machine comprises a throat plate (101), a needle passage region (104) through the throat plate, a needle (2), upper and lower needle holders (4, 5) for driving the needle between a raised position lying wholly above the throat plate and a lowered position lying wholly below the throat plate, and thread-control drum and looper (9, 11) lying below the throat plate. A thread-guide tube (26) is located above the throat plate for guiding supplied thread so that a section thereof lies in a first thread path. A first clamp (33, 34) is operable to releasably clamp the thread adjacent to a free end thereof when lying in said first thread path.

Abstract: An apparatus for positioning a chain of stitches for stitching onto material in a sewing machine having a cutting device, and a first blower for positioning the chain of stitches forwardly of the needle. The apparatus has a second blower for placing the chain in the path of the cutting device.

Abstract: A thread clamp for sewing machines comprises a helical spring as a clamping element which is disposed in a bore extending crosswise to the feed direction of the work in a guide piece placed on the stitch plate. To obtain a very short closing path, the helical spring has in the region of the respective thread pull-off path windings whose mutual distance is greater than in the other regions. The helical spring is compressible by a setting drive for the fixed clamping of the threads.

Abstract: A thread trimming mechanism including a pair of knives for severing thread disposed therebetween. The knives are magnetically attracted to each other such that a cooperative cutting relationship is maintained therebetween.

Abstract: The disclosure relates to the automatic refilling of a bobbin spool, in a lock stitch type sewing machine, in the interval between the loading of work units. After sewing of a predetermined work unit, consisting of a single workpiece, or several workpieces, a premeasured thread length on the bobbin spool is exhausted. While the machine operator places a new work unit in position for sewing, the mechanism of the invention refills the empty bobbin spool, in situ, with a precisely measured length of bobbin thread, drawn from an effectively continuous supply source. The mechanisms provided for this purpose, in and of themselves generally known, are arranged in an improved, simplified and more compact arrangement, suitable for incorporation in a variety of commercial lock stitch type sewing machines available to the trade.