Abstract: This single chain stitch sewing device is provided with a sewing mechanism provided on a front end arm of a delivery robot. The sewing mechanism comprises a sewing motor for supplying power to sewing needles and loopers. When the sewing motor is energized, power is transmitted to the sewing needles via a first power transmission mechanism, this causing the sewing needles to move reciprocally. At the same time, power is transmitted to the loopers via a second power transmission mechanism to rotate the loopers. Accordingly, sewing is performed. The loopers are provided at an end of a post bed on the side closer to the sewing needles.

Abstract: An apparatus for stitching an interior component is disclosed herein. The component having an outer skin layer and the apparatus is a single needle chain stitch machine with a rotary looper and wherein a needle of the apparatus descends through the interior component and a hook of the rotary looper engages a thread loop formed during retraction of the needle after it has descended through the interior component; and wherein the apparatus further includes a mechanism for moving the interior component relative to the needle and looper to establish a stitch length.

Abstract: An apparatus for stitching an interior component is disclosed herein. The component having an outer skin layer and the apparatus is a single needle chain stitch machine with a rotary looper and wherein a needle of the apparatus descends through the interior component and a hook of the rotary looper engages a thread loop formed during retraction of the needle after it has descended through the interior component; and wherein the apparatus further includes a mechanism for moving the interior component relative to the needle and looper to establish a stitch length.

Abstract: Looper section provided under a needle plate includes: a plurality of loopers arranged in an array along a curved movement path; and a movement mechanism for moving the plurality of loopers along the curved movement path to selectively position one of the plurality of loopers in a predetermined needle drop position. Chain-stitch sewing is performed by cooperation between the one looper selectively positioned in the needle drop position and a hooked needle. The looper section projects at its one end portion including the predetermined needle drop position, and a cylindrical sewing workpiece can be taken to and from the needle drop position via the one projecting end portion. The curved movement path is, for example, a U-shaped path.

Abstract: This invention relates to a sewing machine, in particular a chain stitch or a double chain stitch sewing machine and preferably a multiple needle chain stitch or a multiple needle double chain stitch sewing machine employing three stitch forming sewing elements, namely a needle, a looper, and a spreader, with said spreader spreading a thread triangle of a looper thread in which the needle carrying a needle thread plunges for the connection of the needle thread to the looper thread, and with said sewing elements being driven through at least one driving means. The invention further relates to a sewing element for a sewing machine, in particular a chain stitch or a double chain stitch sewing machine, preferably a multiple needle chain stitch or a multiple needle double chain stitch sewing machine, said element consisting of a spreader that spreads a thread triangle of a looper thread in which a needle carrying a needle thread plunges for the connection of the needle thread to the looper thread.

Abstract: An upper looper driving device of a sewing machine is provided. The device includes an upper looper driving shaft which is rotatable around an axis thereof, an upper looper holder having an upper end portion at which the upper looper is held, an upper looper swinging arm having one end portion supported by the upper looper driving shaft such that a position of the upper looper swinging arm is adjustable along an axial direction of the upper looper driving shaft and the other end portion to which the upper looper holder is rotatably coupled, and an upper looper guide slidably holding the upper looper holder. The upper looper guide is supported by a frame of the sewing machine such that a position of the upper looper guide is adjustable along a direction parallel to the axial direction of the upper looper driving shaft.

Abstract: A sewing machine includes a looper formed with a thread hole, a looper shaft holding the looper, and a thread pipe fixed to the looper shaft. The thread pipe includes a thread inserting port at one end and a thread discharging port at the other end. The sewing machine further includes a nozzle from which air is sprayed toward the thread inserting port, a switching mechanism operable to disconnect the looper from the looper shaft when the looper is at a front position, and a moving member which moves the looper to a rear position when the looper is disconnected from the looper shaft by the switching mechanism. When the looper is disconnected from the looper shaft and is moved to the rear position, the thread discharging port matches the thread hole, and the thread inserting port becomes close to the nozzle.

Abstract: A laser indicator is secured on a rotating shaft of a sawing machine, on which rotating shaft a saw is fitted; the laser indicator includes a base, a circuit board, a laser module connected to the circuit board, a vibrating switch, an elastic piece, a battery set, a covering member over the base, and threaded element; the elastic piece is secured to the base at one end while the laser module is fitted on the elastic piece; the covering member has a screw hole, and a through hole facing the laser module for allowing a laser beam to pass through; the threaded element is passed through the screw hole of the covering member and pressed against the elastic piece; thus, the orientation of the laser module can be adjusted for the laser beam to head towards the same direction as the saw blade by means of turning the threaded element.

Abstract: A sewing machine for forming running-stitch seams, comprises a needle provided with an open eye and orientated with the axis substantially perpendicular to a surface for supporting the sewn item and is actuated with a reciprocating motion to pass cyclically through the supporting surface. A thread take-up wheel, provided below the supporting surface, is composed of a fixed part, with a magazine for the taken-up thread, and a rotatable part, rotationally actuated about its own axis. The rotatable part supports a lower looper engaging a portion of the loop that protrudes from the eye along one side of the needle. A thread disengager is provided for disengaging the thread from the needle which engage the portion of the loop of thread protruding from the eye.

Abstract: A double thread chain-stitch sewing machine with a platform containing a needle, a needle plate with a slot, a pressing leg, a looper and a toothed rack for transporting a material, characterized in that it additionally has autonomous disk-shaped cam thread tensioners for a top and a bottom thread and a pusher for the bottom thread installed with the possibility of executing an oscillating movement around its axis, and the looper is installed with the possibility of executing a rotary movement in a vertical plane, parallel to the stitch line and with the possibility of performing two revolutions per one cycle of movement of the needle and the pusher.

Abstract: A thread cutter for a chain stitch sewing machine which performs chain stitch sewing by cooperation of a needle driven up and down and a looper arranged under a needle plate, including: a movable knife arranged so that it can advance into or retract from a gap between a top surface of the looper and an under surface of the needle plate; a knife driving mechanism for advancing and retracting the movable knife; a stationary knife arranged under the needle plate for cutting a sewing thread in cooperation with the movable knife when the movable knife is retracted; and a thread holding plate for holding a cut end of the sewing thread on the side of the looper in a predetermined position by a further retracting operation of the movable knife after the sewing thread is cut and a drive unit for a multi-sewing machine.

Abstract: A chain-stitch blind stitch sewing machine having an arcuate needle to oscillate about an axis such that it passes through material to be sewn. An adjustable stitch loosening finger is attached to the sewing machine such that its position may be adjusted between a thread engaging position and a non-operative position. In its thread engaging position, the finger contacts the thread during the formation of each chain-stitch between two entry sites of the needle to form an additional free thread loop. A relatively loosely sewn point is thereby obtained. When the finger is in its non-operative position, the thread between the two entry sites will rest against the material being sewn to form a tightly sewn point.

Abstract: A novel chain stitch sewing mechanism is disclosed in which thread loops which are retained for enchainment with thread loops introduced by subsequent needle penetration are released only in response to the action of the thread seized and manipulated during said subsequent needle penetration. A chain stitch conversion device for a conventional lock stitch sewing machine operating on this principle is disclosed. Also disclosed is a novel combination of a chain stitch forming mechanism with a sewing machine skip stitch mechanism.

Abstract: An automatic chain-stitch sewing machine comprising, a sewing needle, a work holder for retaining a work piece during sewing, and a rotary hook having a hook point for capturing a needle thread loop and drawing the loop through a previous thread loop. The machine has means for spreading the limbs of the previous thread loop, and memory means having a plurality of instructions containing at least directional information designating the direction of movement of the work holder along separate coordinate directions in a plane relative the needle. The machine has means for reading the instructions and for forming electrical signals representing the instructions. The machine also has driving means responsive to the signals for moving the work holder in said plane relative the needle to form a pattern of chain-stitches in the work piece.

Abstract: A chain stitch forming device includes a loop retaining member for holding a thread loop having been released from a beak of a loop taker. The loop retaining member is provided at the under side of a restraining member which serves to prevent rotation of a bobbin case retainer and is operated in accordance with a cam surface which is directly connected to a lower shaft of the sewing machine.

Abstract: A knitting machine capable of forming filaments of yarn, thread, and the like into a loop-in-loop arrangement includes a plurality of rotary needles which are axially spaced for rotation about a common axis and have at least two circumferentially spaced hook portions. As a needle is rotated, a hook captures a segment of filament being fed to the vicinity of the needle and pulls it into a loop. Upon further rotation, the circumferentially adjacent hook captures another segment of filament and pulls it into a loop through the previously formed loop which is still carried by the needle. As the needle continues to rotate, the first formed loop is cast off the needle by slipping out of the hook in which it is captured and this hook captures another segment of filament to start another cycle.