Abstract: A cutting needle rotation device includes a mounting portion, a first member, a moving member, and a rotation mechanism. The mounting portion is removably mounted on a needle bar of a sewing machine. The first member is a member to which a cutting needle is affixed. The moving member is positioned in a first position when the moving member does not receive an external force and moves to a second position when the moving member receives an external force. The rotation mechanism, when the moving member is in the first position, holds the first member such that the cutting needle does not rotate, and when the moving member moves from the first position to the second position and returns from the second position to the first position, rotates the first member such that the cutting needle rotates by a specified angle of rotation in one direction.

Abstract: Rotary hook drive device for a sewing machine includes: a rotary hook rotatably provided on a rotary hook support; a cylindrical grooved cam provided on a drive shaft drivable to rotate in one direction; a cam follower engaged in a cam groove of the cylindrical grooved cam and capable of making reciprocative movement about a support shaft in response to rotation of the cylindrical grooved cam; and a transmission mechanism that transmits the reciprocative movement of the cam follower to the rotary hook to cause the rotary hook to make reciprocative pivoting movement. Such arrangements can prevent deviation in driving timing of the rotary hook and simplify the construction of the rotary hook drive device.

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: 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 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 bi-metal control flap for a wood stove is biased to close by gravity and is controlled to open an air inlet when the temperature rises which is opposite to the traditional bi-metal control systems which close when the temperature rises. The valve is a free pivoted L-shaped flap with a first portion and a second portion extending from a pivot position and supported by a casing. The first portion is positioned over an air supply inlet and retained over the inlet by gravity. A crank arm supported by the casing rotates to push against the second portion of the flap to open the flap a predetermined amount, and a bi-metal strip coil having an outer end attached to the casing and a floating inner end attached to the crank arm such that a change in temperature causes the crank to rotate to open the flap or allow the flap to close by gravity.

Abstract: A sewing machine carries a sewing needle which in turn carries a thread through a stitching aperture of a throat plate beneath which is located a gripper carried by a gripper shaft. The gripper is defined by a gripper neck, a gripper hook and a gripper knee joining the gripper hook and the gripper neck. Located adjacent the gripper bend is a thread-cutting blade. A cam, link and linkage system is provided for selectively driving the gripper shaft to selectively (a) move the gripper (7) a predetermined distance through which the cutting blade is inoperative and (b) move the gripper a further distance beyond the predetermined distance through which the cutting blade is operative to cut-off the thread. A stop boss is also provided adjacent the gripper bend to prevent the thread from being cut during motion of the gripper the predetermined distance.

Abstract: A thread cutter for a sewing machine uses a circular rotary cutter mounted to the sewing machine. The thread cutter includes a body having an air motor disposed therein. A circular blade is supported on a shaft extending from the air motor. The cutter body is reciprocally supported on a rod fixed at one end to a mounting plate. The rod is disposed in a cylinder within the body and has a piston end, air supplied to one side or the other of the piston driving the cutter body reciprocally into and out of engagement with any threads trailing from a sewn article.

Abstract: A thread cutting knife device in a sewing machine having a bed has a lower shaft rotatably supported at the bed and a throat plate mounted thereon. A hook is attached to the lower shaft and extends beyond a throat plate. A thread cutting knife and a loop spreading plate are adapted to cross between the hook and the throat plate to cut a needle thread looping portion at a cloth side and a bobbin thread. The knife and the plate are respectively rotatably supported by the lower shaft. The knife has a blade at an upper edge of the tip end thereof. The loop spreading plate has a thread dividing portion extending into the needle thread looping portion at the cloth side and a thread looping portion at the side of the needle. A thread drawing portion is formed at one edge of a base of the dividing portion for holding the needle thread looping portion at the cloth side and the bobbin thread. A blade positioned at the side of the throat plate and is opposed to and crosses the blade of the thread cutting knife.

Abstract: Apparatus and a method for making a piped opening in a garment are disclosed. Two collinear cuts are made in the piping strip at a preparation station. The cut piping strip is then transferred to a sewing machine table where the piping is laid onto a piece of fabric. Then, the incision for making the garment opening is cut through both the piping strip and fabric. The piping strip is then folded through the incision and the two collinear cuts in the piping cooperate to prevent bulges from forming in the ultimately formed piped opening in the garment.

Abstract: An axially movable plunger in a bobbin, and a cam for disposing the plunger in a position resulting in rotation of the bobbin for bobbin winding are formed with engageable planar surfaces, one of which includes a sharp edge hole, and the other of which includes an elongate slot to provide for the cutting of thread between the edges of the hole and slot at the outset of a bobbin winding operation.

Abstract: The invention pertains to a cutting apparatus for sewing machines disposed downstream of the machine's sewing zone. The apparatus includes a cutting blade and a protective guard for the blade both of which have independent actuating devices. The actuating devices are effective in moving the guard and blade between one position which provides clearance for the workpieces being advanced along the machine's work surface and another position where they are operatively associated with the workpieces. A timing element is operatively associated with both actuating devices and is effective in causing the protective guard to be moved toward the workpieces prior to movement of the blade.

Abstract: A cut-pile tufting machine is disclosed having a module rotatably supporting a plurality of circular knife blades driven by gears mounted on a common shaft with the blades. The module also carries idler gears in mesh with the drive gears for driving them from gearing on a drive shaft mounted in the tufting machine bed when the modules are installed.

Abstract: An underbed thread trimmer mechanism for severing the needle and bobbin threads upon completion of a sewing operation. Operation of the thread trimmer may be selectively initiated by operator command. A plurality of cams and members cooperate to transfer power from a loop taker shaft to a thread handling disc-like member situated in close proximity to the sewing machine loop taker. A thread cutting knife is disposed in covering relation to the thread handling member and cooperates with the thread handling member to trap the needle and bobbin threads and direct them to a knife surface of the thread cutting knife where they are severed. The mechanism that drives the thread trimmer resets itself at the completion of the thread cutting cycle.

Abstract: A thread-cutting device for a cyclically operated double lock stitch sewing machine forming part of an automatic sewing system serves to cut the needle and bobbin or looper threads, respectively, at the underside of the throat or stitch plate of the sewing machine in close proximity to the needle hole in the throat or stitch plate. For cutting of the threads, a cutting edge is moved with respect to a stationary cutting blade into a cutting position for simultaneously cutting of the two threads. The carrier for the movable cutting tool moves the stationary cutting blade into its effective cutting position and further carries thread control fingers which assist in preparing the threads for the cutting operation. The cutting mechanism is actuated by the control means for the cyclically operated double lock stitch sewing machine.

Abstract: A device on a sewing machine for severing thread chains comprises a driven movable cutting knife which has a cutting edge disposed to move in a path in which it is spaced from a stationary counterknife. The driven knife is continuously rotated during the ordinary sewing operation, and when cutting is to be effected, the thread chain is directed so that it is moved over the counterknife to place it in a deflection position in the path of movement of the movable cutting knife and cause the movable cutting knife to move in a path in which it comes into the range of cooperative interengagement with the stationary counterknife.

Abstract: A thread-cutting assembly for use with a sewing machine that always presents a sharp cutting edge for thread cutting. The assembly includes a circular cutting disk having a circumferential cutting edge, and a guard plate for preventing access to the majority of the circumferential cutting edge of the disk but exposing a portion of the disk circumferential cutting edge. The disk is mounted to the guard plate so that the disk rotates with respect to the guard means about an axis when thread to be cut by the disk is brought into engagement with the exposed portion of the disk so that a new cutting surface is exposed, and the guard plate is operatively mounted to a sewing machine. The guard plate also sharpens the cutting edge of the disk upon rotation of the disk with respect to the guard plate, the guard plate being formed of metal having a greater temper than the metal of the disk.