Abstract: Described are embodiments of a multilaminate or multiple layer implantable surgical graft comprising remodelable collagenous sheet material, the graft including one or more interweaving members to stitch together the graft to help prevent the layers from delaminating or separating during handling and the initial stages of remodeling. The interweaving members may comprise lines of suture, thread, individual stitches, strips of material, etc. that are woven through the layers of biomaterial in a desired pattern. In one embodiment, the interweaving members comprise a pharmacologically active substance, such as a drug, growth factors, etc. to elicit a desired biological response in the host tissue. In another embodiment, the graft further comprises a reinforcing material, such as a synthetic mesh, within the layers of remodelable biomaterial and stitched together by one or more interweaving members.

Abstract: A take-up cam phase adjustment structure of looper thread take-up apparatus of a sewing machine includes a rotary shaft rotatablly mounted in the sewing machine. A thread-guiding plate mounted on the housing for correspondingly pressing a stitching thread against the rim of the take-up cam. A transmission mechanism connected between the lower driving shaft and the rotary shaft. The transmission mechanism includes a driven wheel rotatablly mounted on the rotary shaft. The take-up cam phase adjustment structure includes a locking member for locking the driven wheel on the rotary shaft and a turning section disposed at one end of the rotary shaft. After the second locking member is unscrewed and loosened, by means of rotating the turning section, the relative radial positions between the take-up cam and the lower driving shaft is drivingly adjustable.

Abstract: A looper thread take-up apparatus of a sewing machine, which is mounted near a side of the machine bed distal from an operator and is adjacent to the lower knotting hook. The looper thread take-up apparatus includes a rotary shaft. One end of the rotary shaft is driven by the lower driving shaft, while the other end of the rotary shaft is coupled with the thread take-up cam.

Abstract: A sewing machine includes a first and a second lower rotary shafts coaxially coupled with each other by a shaft and disposed in a lower housing of the sewing machine. A looper thread take-up cam includes a first and a second take-up cam plates slidably key-fitted on the second lower rotary shaft. A slide interval is defined between the take-up structure and the shaft coupler, whereby the second cam plate can slide along the second lower rotary shaft to the slide interval and separate from the first cam plate for easily clearing up the tangling thread. A guide plate of the take-up structure is movably connected with a bracket of the lower housing, whereby by means of changing the position of the guide plate relative to the second lower rotary shaft, the take-up timing can be adjusted.

Abstract: A looper thread take-up apparatus externally added to outer end of lower driving shaft of a sewing machine. A thread guide structure and a looper thread tension adjustment structure are mounted on outer face of the housing of the sewing machine and are adjacent to the outer end of the lower driving shaft of the sewing machine. The thread take-up cam is detachably disposed at the outer end of the lower driving shaft and rotatable along therewith. In case the looper thread breaks and tangles with the thread take-up cam, the thread take-up cam can be directly detached from the outer end of the lower driving shaft so that it is easy and convenient to clear up the tangling thread from outer side of the sewing machine.

Abstract: A looper thread take-up apparatus of a sewing machine, which is mounted near a side of the machine bed distal from an operator and is adjacent to the lower knotting hook. The looper thread take-up apparatus includes a rotary shaft. One end of the rotary shaft is driven by the lower driving shaft, while the other end of the rotary shaft is coupled with the thread take-up cam.

Abstract: A looper thread take-up apparatus externally added to outer end of lower driving shaft of a sewing machine. A thread guide structure and a looper thread tension adjustment structure are mounted on outer face of the housing of the sewing machine and are adjacent to the outer end of the lower driving shaft of the sewing machine. The thread take-up cam is detachably disposed at the outer end of the lower driving shaft and rotatable along therewith. In case the looper thread breaks and tangles with the thread take-up cam, the thread take-up cam can be directly detached from the outer end of the lower driving shaft so that it is easy and convenient to clear up the tangling thread from outer side of the sewing machine.

Abstract: The machine comprises a needle with an open eye orientated perpendicular to a supporting surface for the sewn item and actuated with reciprocating motion to pass cyclically through the supporting surface and the sewn item, carrying a thread loop; a thread take-up wheel having a fixed part, with a magazine for taken-up thread, and a rotatable part; a lower looper engaging the thread loop below the supporting surface and loading the thread into the magazine; and comprises a thread handly unit allowing correct formation of the stitches.

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: 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: Looper thread take-up structure of sewing machine capable of very easily clearing up tangling thread, including: a rotary shaft; a first and a second take-up cam plates each having a cam outer rim and a non-circular shaft hole, the first and second take-up cam plates being detachably keyed on the rotary shaft; and a spacing ring having a through hole and detachably fitted on the rotary shaft between the first and second take-up cam plates for spacing the same. In case a stitching thread is accidentally tangled on the spacing ring, the first and second take-up cam plates can be separated from each other for quickly and easily clearing up the tangling thread.

Abstract: An apparatus for detecting thread breakage in a sewing machine. The sewing machine comprises a looper reciprocating laterally across a leading end of a needle, a thread-controlling cam fixed on a rotary shaft interlocked with the reciprocal motion of the looper and varying in the extent of projection from the thread take-up stand along with rotation of the shaft, and thread guides disposed on the thread take-up stand at both sides of the thread-controlling cam. Said thread guides have thread eyelets for inserting the looper thread. Other thread guides having thread pass eyelets for inserting the looper thread are fixed and disposed on the looper thread route between the thread-controlling cam and the looper. A thread breakage-detecting member detects presence or absence of vibration of looper thread inserted in the thread pass eyelets of other thread guides between the other thread guides.

Abstract: A buttonhole sewing machine comprises a needle thread feeding mechanism, in which the needle thread is guided over a cam disk, which performs a rotation during two stitches of the needle. Along its periphery, the cam disk has such a curvature that tensioning and releasing the needle thread complies with the requirements of alternately sewing a single thread chain stitch and a double thread chain stitch during the sewing of a zigzag buttonhole seam.

Abstract: A looper thread take-up apparatus which is mounted on a position away from a sewing machine bed, on the side facing a needle drop point of a leg portion for supporting the base end of a sewing machine arm on the machine bed with a thread take-up cam fixed on a rotating shaft which is projected from the side face of the leg portion and is interlocked with a sewing machine main shaft within the machine bed or with the upper shaft within the machine arm, where the looper thread take-up cam is rotated synchronously with the vertical motion of the needle at the nose of the machine arm, and with the advancing and retreating operations of a looper within the machine bed, thereby to make supplementary operations easier such as setting of the looper thread, adjusting of the loosening extent or the like without interference with the sewing operation.

Abstract: A rotary thread take-up lever for acting on an upper thread in a sewing machine, comprising: a base portion which is continuously rotatable around a predetermined axis in one direction; and an arm extending outwardly from the base portion with respect to the axis, the arm including a front edge facing in the direction of rotation of the thread take-up lever and a rear edge facing in the direction opposite to the direction of rotation of the thread take-up lever. The front edge has a thread holding point, wherein the upper thread being lifted by the thread take-up lever is slid on the front edge. The rear edge has a thread holding point, wherein the upper thread being supplied from the thread take-up lever is slid on the rear edge. When the upper thread is supplied maximumly, the upper thread is held by the thread holding points of the front and rear edges, respectively.

Abstract: A cam shaft of a rotary looper thread take-up is extended short of a thread guide and thus provides a free space there-between. A thread introduced from the tip-end-side of the cam shaft is prevented from being entangled into the cam shaft when the looper thread becomes broken. In a preferred embodiment, three slit-like guides placed in parallel and two cams placed there-between are effective to introduce the looper thread into the rotary looper thread take-up by a simple operation without requiring an operator to visually align the thread to pass through an eyelet.

Abstract: A thread control device for the looper thread of a chain stitch sewing machine having a rotating thread take-up disc and a cover plate containing a slot for the thread take-up disc. To prevent broken thread being wound up on a main shaft, a tube carrying a pressure medium, such as a stream of air, is disposed between the thread take-up disc and a looper eye. Tension is thereby mantained in the looper thread even if the thread breaks downstream of the thread take-up disc.

Abstract: An overlock sewing machine wherein a thread which breaks between the shuttle and the looping discs is allowed to bypass the loop stripping device and is advanced by the discs toward and against the cutting edge of a knife provided on one leg of the U-shaped thread guide which confines the looping discs. This prevents the discs from convoluting the broken thread onto the shaft which drives the discs.

Abstract: A thread control device comprising, a rotatable disc assembly for controlling a thread and having a rotational axis. The device has a knife located on at least one side of the disc assembly and having a cutting edge disposed generally parallel to the rotational axis of the disc assembly.

Abstract: A pneumatic apparatus used in combination with a sewing machine thread take-up mechanism. The apparatus includes a device for directing a stream of air away from the machine's operating components and against the thread passing over the take up mechanism for preventing broken ends or loose thread from becoming entangled with the machine's operating components.

Abstract: A thread feed arrangement particularly suitable for use in an embroidery machine for feeding and tightening a thread includes a drive mechanism for rotating a thread roller in the machine about its axis so as to tighten the thread a desired amount after the thread is formed into a stitch or loop. The drive mechanism is controlled by a control device in corresponding relationship with the formation of the stitch or loop, such as by a punched card control system which controls the entire operation of the machine. When using the feed arrangement, thread breakage is significantly reduced and a substantial number of commonly used reciprocating machine parts such as thread guides are no longer required.