Abstract: A sewing or looping head, particularly for the automated closing of tubular knitted articles at one of their axial ends comprising a pair of sewing elements, which can move along corresponding actuation paths and cooperate with each other in forming a sewing chain stitch, and a cutting element, which can be actuated to cut the sewing chain stitch; in the sewing or looping head, the cutting element can engage the sewing chain stitch proximate to the crossing point of the paths of the pair of sewing elements or the point where the sewing chain stitch is formed, so as to minimize the length of the sewing chain stitch that exceeds the length needed to sew or loop the article and so as to reduce the time required to perform the sewing or looping operation.

Abstract: A method and apparatus for sewing a fringe to a woven textile work piece. A method and apparatus for cutting a uniform fringe edge on woven textile material fringe. A method and apparatus for severing a woven textile work piece from a sewing machine.

Abstract: A scissors-type thread-cutting device for a sewing machine includes an elongated base, which is adapted to be fixed on the machine bed. An elongated first blade member is mounted telescopically on and locked releasably on the base, and is movable lengthwise on the same when released. A sliding member can move lengthwise on the first blade member. A driving unit is adapted to be disposed on the machine bed for activating the sliding member to reciprocate on the first blade member. An elongated second blade member is mounted telescopically on and locked releasably on the sliding member, and presses against the first blade member. The first and second blade members have intersecting cutting edges, which are adapted to cut a thread therebetween during movement of the second blade member relative to the first blade member.

Abstract: A buttonhole sewing machine includes a holding mechanism attached to a holder arm which reciprocates in a direction perpendicular to an amplitude direction of a needle. The holding mechanism includes a workpiece holder plate and constitutes a parallelogram linkage. The holding mechanism maintains a parallelogram shape even when the holder plate slants on a fold of the workpiece, and securely holds the workpiece. This buttonhole sewing machine also includes a cutting mechanism which cuts thread and braid in a short manner even when the holder plate slants. The cutting mechanism has a rotary cutter and a fixed cutter, and the fixed cutter is fixed on the holder plate while inclined from a proximal portion to a distal portion. A wire member is connected to the mobile cutter to facilitate the rotation of the rotary cutter even when the holder plate slants.

Abstract: A sewing machine which performs a stitching operation using multiple kinds of threads has: a plurality of thread supplies; a thread selection device which selects and extracts an arbitrary thread from the plural threads supplied from the thread supplies; a stitching needle; and means for nipping a front end portion of the thread extracted by the selection device, and for bringing the front end portion to the needle. The thread extracted and selected by the selection device is brought to the needle while the front end portion is mechanically nipped.

Abstract: Obtained is a thread cutter for a sewing machine which can further readily and reliably cut a needle thread, a looper thread or a chain loop by pushing down a knob without driving the sewing machine. In this thread cutter for a sewing machine, a long groove is formed in a needle plate which is positioned behind a presser foot, and a fixed blade is so provided that its cutting edge is along an edge of the long groove. A movable blade which is pressed against the fixed blade by a plate spring is mounted on a spindle, and the spindle is rotated to vertically move the movable blade when the knob frontwardly projecting from the sewing machine is operated. The thread or the chain loop is cut by the vertical movement of the movable blade in association with the fixed blade.

Abstract: In a trimming device for cutting a cover thread (30) on a multiple needle chainstitch sewing machine, a moveable thread catcher (15) picks up the cover thread (30), which runs between the cover thread guide (27) and a hook part (29) on the spreader (28), and presses the cover thread (30) towards a trapping and cutting device (49,51,48,40) of the trimming device which is disposed adjacent to the left-hand sewing needle (23).

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: Apparatus and method for severing the needle and looper threads of a chain stitch formed by a sewing machine having an in-line looper system. The sewing machine has a needle plate and a needle carrying the needle thread through the material and the needle plate to form a needle loop of needle thread therebelow that has a needle side running to the needle. The apparatus comprises a stationary knife, a spring positioned below the stationary knife and biased in a direction toward the stationary knife, and a movable knife slidably mounted between the stationary knife and the spring which yieldingly urges the movable knife thereagainst. The movable knife has one penetrating end with a pair of axially offset barbs, a lagging barb and a leading barb closer to the penetrating end of the movable knife than the lagging barb. These three elements cooperate to hook and sever the needle side of the needle loop and the looper thread below the needle plate and prepare the looper thread for the next stitch.

Abstract: A trimming device for trimming a top cover thread from a workpiece on a multiple needle sewing machine having a thread catching device which is movable between a counter-plate and a knife. In operation the top cover thread is picked up by the thread catching device between a workpiece and a top cover thread guide. A top cover thread trap serves as a counter-plate for the thread catching device. The knife is attached to the counter plate with a gap therebetween, with the thread catching device being swingable within said gap.

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: An ornamental thread automatic cutting device of a flat plural-needles sewing machine. Ornamental thread can be cut automatically at the same time as needle thread and looper thread are cut and a cut end of ornamental thread just after passing the eyelet is gripped mechanically upon cutting to facilitate the succeeding sewing operation.

Abstract: A yarn cutting scissors device suitable for use for cutting a weft is disclosed which is capable of decreasing the frictional force occurring between a stationary blade and a movable blade when both blades are successively engaged in the cutting operation and effectively accomplishing the accessible engagement between both blades. The yarn cutting scissors device includes a leaf spring which has one end fixedly mounted on a support block and the other end on which a stationary blade is mounted, a shim washer arranged between the support block and the leaf spring, and a compression coil spring mounted on the support block to constantly urge a movable blade against the stationary blade, so that the stationary blade may be oscillated in the direction perpendicular to that of oscillation of the movable blade.

Abstract: A thread chain sewing apparatus for use in overedge sewing machines has a thread chain catcher with a cutter for cutting a thread chain formed to extend from an end of a fabric and suctionally engaged against a suction opening. A presser foot having a guide groove for insertion of the thread chain is movable up and down, and a thread chain carrier is aligned with the thread chain catcher and has a suction nozzle for suctionally receiving the cut-off thread chain to carry it over the presser foot. An air blow tube running under the throat plate can be provided, an aperture thereof blowing the chain toward the suction opening. A thread chain presser mechanism has a holding plate movable up and down over the presser foot for pressing the thread chain into the guide groove of the presser foot.

Abstract: A cutting device for cutting the thread chain, or the like, between successive sewn parts moving along a path through a sewing machine. The sewing machine includes a needle. A holder downstream of the needle includes a horizontal cutout. A hook for lifting the thread chain between adjacent sewn parts on the path is movable up through the cutout for raising the thread chain. A scissors moves across the sewn part path and cuts the upraised thread chain. The holder holds the upstream sewn part from shifting while permitting the downstream sewn part to shift slightly upstream as the hook rises and prior to the cutting, whereby a single cut cuts the thread chain adjacent both sewn parts. A sensor senses the trailing edge of a sewn part and activates a stitch counter to cause the needle to apply a predetermined number of stitches before halting sewing so that the cutting can thereafter take place.

Abstract: A thread cutting device for a double lockstitch sewing machine is provided with a rotatably driven hook including a hook beak for seizing a needle thread loop. In order to assure a safe pickup, the thread catcher performs an operating movement in a tilt direction oppositely directed with respect to the direction of rotation of the hook. Furthermore, the thread catcher is operable if the hook point has passed the stitch hole for a range of about 90.degree. considered in the direction of rotation of the hook.

Abstract: An upper thread cutting unit in buttonhole sewing machines wherein a lever is provided for connecting and disconnecting the support of the thread cutting unit to and from a supporting member, connected via a lever and rod system, to the stop device of the sewing machine. Two appropriately set springs force the thread cutting unit, at the end of the sewing cycle, under the needle to catch and cut the upper thread and force the unit away from the needle to permit raising higher the work presser frame.

Abstract: A cycle sewing machine equipped with an improved cloth feeding mechanism which is so arranged that, through rocking control of oscillating levers by a cloth feeding cam via cam rollers, a feed table is displaced in longitudinal directions of a sewing machine bed (i.e. in X directions) or in directions intersecting at right angles with the longitudinal directions (i.e. in Y directions), and by the composite movements as described above, the garment to be sewn is moved as desired with respect to sewing positions for two sewing needles vertically moving at predetermined positions, and thus, it has been made possible to simultaneously form the same seams at two positions of the garment in an efficient manner.

Abstract: An automated thread trimming apparatus is provided for use with a sewing machine having a plurality of needles. The apparatus is mounted on the side of the sewing machine away from the sewing machine operator. A pair of blades is provided for each needle of the sewing machine. The blades are adjustably mounted on blade mounting bars. Upon actuation, the blades are positioned to straddle each array of stitches produced by the sewing machine needles. The blade mounting bars are then moved slidably relative to one another so that each pair of blades severs an array of stitches. The blade mounting bars are then moved away from the work table of the sewing machine allowing the next workpiece to be sewn.

Abstract: A thread trimming mechanism which includes a fixed blade arranged adjacent the stitch forming area of the sewing machine and a resiliently biased movable blade adapted to cooperate in a scissor-like action with the fixed blade. The movable blade is mounted such that varying degrees of contact pressure may occur between the blades during the thread trimming cycle of the mechanism.

Abstract: This invention relates to a needle guard which is adapted to position the needle relative the lower stitch forming mechanism and further serves to minimize skipped stitches during the sewing operation. The needle guard is positioned beneath the work supporting surface of the machine and during the sewing operation is disposed proximate the needle path. Upon completion of the sewing operation the needle guard is retracted from the path of the needle. Adjustable means are provided so as to accomodate the needle guard to needles of various sizes and to permit positioning of the needle guiding surface with respect to the path of the needle.

Abstract: A thread cutting device applicable to sewing machines includes elements connected to a support plate to be installed in the sewing machine at the position therein where the common sliding elements are to be located. The support plate has a screw which acts on a bridge element when the bridge element is pressed against the lower face of a panel of the machine. One of the elements of the thread cutting device has a generally Y-shaped configuration and is provided with an alternating lineal movement, either by means of manual, electro-pneumatic or electromagnetic operation, in directions parallel to that of the sewing of the machine. Such shaped element angularly operates a movable knife against a fixed knife in synchronized cooperation with a thread collecting hook which also has an angular displacement. The arrangement further includes a thread withdrawing device and a thread tension opening device.

Abstract: A cutter mechanism for use in a tufting machine or the like featuring a stationary blade having openings through which yarn strands project, the stationary blade being positioned in the path of travel of yarn strands from yarn creels to bit-applying elements with the cutter mechanism further featuring a series of reciprocable blades which are biased against the stationary blade whereupon reciprocation the reciprocable blades will pass over the openings and because of their biasing effect, penetrate the plane of the stationary blade passing into the openings thereby severing the yarn strands.

Abstract: A sewing machine thread trimming mechanism for severing both the needle thread and bobbin thread close to the workpiece at the end of a stitching operation and for providing a sufficient length of bobbin thread after trimming so that stitching on a succeeding seam may proceed. The thread trimming mechanism includes a trimming device having two pivotly connected moveable blades which are swingably mounted beneath the sewing machine throat plate. One of the blades is mounted for movement into the needle thread and bobbin thread path whereby engaging and carrying the same into severing engagement with the second moveable blade. The second moveable blade is eccentrically pivoted relative the first blade and is provided with a floating fulcrum which controls the movement of the second blade so as to produce a true scissor like action between the two blades.