Abstract:
Apparatuses, methods, and computer program products for quilting webs. A quilting machine includes a cutting edge, a looper from which thread is provided to form stitches, and an adjuster assembly that includes a plurality of selectable positions. The adjuster assembly extends an adjuster toward the thread between the looper and the retainer. When the adjuster is moved, a predetermined amount of thread is pulled away from the looper by the adjuster to provide a controlled length of thread between the looper and the cutting edge. The adjuster is configured to be moved to an intermediate selectable position prior to starting a quilting pattern, and from the intermediate position to another selectable position subsequent to starting the quilting pattern.
Abstract:
A gas carrying threading device includes a clutch for transmitting power from a sewing machine motor to a drive shaft that drives a stitch forming device at the time of stitch formation or to a gas supply pump at the time of looper threading, a looper threading/stitch forming changeover mechanism for changing over the clutch so that transmission of power to the stitch forming device is interrupted and the power is transmitted to the gas supply pump at the time of the looper threading and the power is transmitted to the stitch forming device and the transmission of the power to the gas supply pump is interrupted at the time of stitch formation, and a changeover prohibition mechanism for prohibiting abnormal changeover to a stitch forming state of the looper threading/stitch forming changeover mechanism during the gas supply operation of the gas supply pump.
Abstract:
A threading device for a sewing machine lower looper is disclosed that can thread a lower looper safely and reliably by reliably preventing a main shaft from rotating when an operation of threading the lower looper is carried out.
Abstract:
An overlock sewing machine including a main shaft rotated by a sewing machine motor; a vertically moving sewing needle and an overlooper and an underlooper respectively driven by the rotation of the main shaft; a single looper drive shaft forming overlock stitches in cooperation with the overlooper, the underlooper and the sewing needle and rotated by the rotation of the main shaft, shaft line thereof being arranged perpendicularly to the main shaft; and a swing generating member having first and second swing generating portions fixed to the looper drive shaft for swinging the overlooper and the underlooper respectively; a first and second swing link mechanisms, both of which extend perpendicularly to the looper drive shaft, swinging the overlooper and the underlooper by conveying the drive force generated by the first and second sewing generating portions.
Abstract:
A horizontal rotary hook for a sewing machine includes a bobbin case holder accommodating a bobbin, a rotating hook made of a synthetic resin, and accommodating the bobbin case holder and rotated in a predetermined direction, the rotating hook including a peripheral wall and a peripheral end, a needle-thread passing opening formed in the peripheral wall of the rotating hook so as to be defined at least by a peripheral end of the peripheral wall, and a reinforcing rib provided on the peripheral wall of the rotating hook so as to be located in the vicinity of the peripheral end defining the needle-thread passing opening.
Abstract:
Multi-needle quilting knotted-stitch machine with lower stitching elements having rotating hooks, the machine comprising an inlet assembly for the controlled feed of the textile material (11) to be quilted, a stitching assembly including upper stitching elements (12) and lower stitching elements and an outlet assembly for the collection and possible measurement and cutting of the quilted product (19). The upper stitching elements including at least two parallel bars (13) arranged lengthwise and supporting, in a position separated lengthwise, the relative stitching needles (24), the lower stitching elements of rotating hooks (17) being organized in longitudinal rows mating with the position of the relative needle-carrier bar (13), the position of each needle (24) corresponding to the position of a respective rotating hook (17). The quilting machine including the rotating hooks (17) assembled, spaced lengthwise at a defined assembly distance, on respective faces (116a, 116b) of at least two longitudinal bars (16a, 16b), at least one of the hook-carrier bars (16a, 16b) being able to be displaced lengthwise with respect to the other bar (16b, 16a) by a value (D) equal to a desired sub-multiple of the assembly distance of the rotating hooks (17) on the relative bar (16a, 16b).
Abstract:
In a device for forming ornamental stitch seams, which comprises two or more needles (3a, 3b) moving alternately backward and forward through a needle plate (2) and a looper (5) cyclically movable following an elliptical trajectory (t) under the needle plate (2), the needles (3a, 3b) describe inclined trajectories (y) to form, with the needle plate (2), an acute angle turned towards the sewing direction (A), for crossing the looper trajectory (t) at a "crossing area" that, relative to a vertical direction (v) passing by the point at which the needles (3a, 3b) get through the needle plate (2), is shifted in a direction opposite to the sewing direction (A).
Abstract:
A looper throw-out device containing a latch for catching the release lever of the looper throw-out device when the release lever is left in the unlocked position. The latch is mounted on the inside portion of the sewing machine cover. If an operator fails to lock the release lever before sewing, the latch catches the unlocked release lever when the operator attempts to close the sewing machine cover.
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 single-operation cam mechanism includes a cam body with a cam surface extending along the body from an entrance location to an exit location. A cam follower is retained in a waiting position adjacent a part of the cam body at which the exit location is found. When the cam follower is moved free of the retainer, a spring forces the cam follower to the part of the cam where the entrance location is found. Then, as the cam rotates, the cam surface engages the follower and forces it back through the exit location and past a resilient trap to the waiting position. The trap snaps shut after the follower has been forced past it, and the surface of the trap then prevents the follower from moving back into engagement with the cam surface except by way of the entrance location. In an underbed thread trimmer, a support member for the cam follower engages a pin connected to blade-like members, some of which have hooks, to carry one set of such members to a position in which their hooks engage looptaker thread. Another set of such members is carried by the pin to a different location in which their hook engage a limb of needle thread. The follower is connected to the pin by a support member so that movement of the follower back to its waiting position retracts sets of hooks and draws the threads across separate ledger blades to sever them.