A hopping foot assembly for a sewing machine having a needle comprises a hopping foot base and a hopping foot arm. The hopping foot base is shaped to include a needle opening that extends axially therethrough relative to an axis. The hopping foot arm extends from the hopping foot base. The hopping foot arm is configured to be coupled to the sewing machine to fix the hopping foot base relative to the sewing machine.

A strength member sewing machine is provided which comprises upper and lower feeder spools, a collection spool and idlers positioned on a support structure. A cord supply, a fabric shaper, a speed control and a pressure foot lift are positioned on the structure. Fabric from the spools is kept in tension with the idlers while moving toward the fabric shaper. The fabric from the upper spool is crimped while the fabric from the lower spool remains flat underneath the shaper. Between the fabric layers, pull cords are pulled through from the cord supply thru the fabric shaper. The fabric with crimps and with the pull cords inside the crimps is sewn to the fabric from the lower spool to create casings with a pull cord in the internal space of each casing. The joined fabrics with the pull cords are collected by the collection spool as a finished product.

A strength member sewing machine is provided which comprises upper and lower feeder spools, a collection spool and idlers positioned on a support structure. A cord supply, a fabric shaper, a speed control and a pressure foot lift are positioned on the structure. Fabric from the spools is kept in tension with the idlers while moving toward the fabric shaper. The fabric from the upper spool is crimped while the fabric from the lower spool remains flat underneath the shaper. Between the fabric layers, pull cords are pulled through from the cord supply thru the fabric shaper. The fabric with crimps and with the pull cords inside the crimps is sewn to the fabric from the lower spool to create casings with a pull cord in the internal space of each casing. The joined fabrics with the pull cords are collected by the collection spool as a finished product.

A knee operated lifting mechanism for a presser foot of a sewing machine is fixed on a body of the sewing machine, the body is provided with a presser-foot shaft, the knee operated lifting mechanism is drivingly connected to the presser-foot shaft, so as to consequently drive the presser foot to move up and down. The knee operated lifting mechanism includes a knee pushing device, a cable and a rotary member. The knee pushing device includes a knee pushing plate to be operated by a user. The cable is drivingly connected to the knee pushing plate to control the rotation of a drive shaft and the rotation of the presser-foot shaft as well, which consequently controls the upward and downward motion of the presser foot, and thus considerably simplifying the structure of the knee operated lifting mechanism.

A knee operated lifting mechanism for a presser foot of a sewing machine is fixed on a body of the sewing machine, the body is provided with a presser-foot shaft, the knee operated lifting mechanism is drivingly connected to the presser-foot shaft, so as to consequently drive the presser foot to move up and down. The knee operated lifting mechanism includes a knee pushing device, a cable and a rotary member. The knee pushing device includes a knee pushing plate to be operated by a user. The cable is drivingly connected to the knee pushing plate to control the rotation of a drive shaft and the rotation of the presser-foot shaft as well, which consequently controls the upward and downward motion of the presser foot, and thus considerably simplifying the structure of the knee operated lifting mechanism.

A presser foot for a sewing machine has a bottom wall, first and second side walls, and a guard piece. The bottom wall has front and rear ends. In addition, the bottom wall is provided with a needle-passing hole and a first slit extending from the needle-passing hole to the front end. The first side wall and the second side wall are formed integral with the bottom wall and spaced apart from each other in a width direction of the bottom wall. The guard piece is attached to the first side wall to cover the gap between the first side wall and the second side wall from above. In plan view, the guard piece is spaced from the needle-passing hole and does not overlap with the needle-passing hole. The guard piece and the second side wall are spaced apart from each other by a second slit.

A presser foot for a sewing machine has a bottom wall, first and second side walls, and a guard piece. The bottom wall has front and rear ends. In addition, the bottom wall is provided with a needle-passing hole and a first slit extending from the needle-passing hole to the front end. The first side wall and the second side wall are formed integral with the bottom wall and spaced apart from each other in a width direction of the bottom wall. The guard piece is attached to the first side wall to cover the gap between the first side wall and the second side wall from above. In plan view, the guard piece is spaced from the needle-passing hole and does not overlap with the needle-passing hole. The guard piece and the second side wall are spaced apart from each other by a second slit.

A presser foot for a sewing machine has a bottom wall, first and second side walls, and a guard piece. The bottom wall has front and rear ends. In addition, the bottom wall is provided with a needle-passing hole and a first slit extending from the needle-passing hole to the front end. The first side wall and the second side wall are formed integral with the bottom wall and spaced apart from each other in a width direction of the bottom wall. The guard piece is attached to the first side wall to cover the gap between the first side wall and the second side wall from above. In plan view, the guard piece is spaced from the needle-passing hole and does not overlap with the needle-passing hole. The guard piece and the second side wall are spaced apart from each other by a second slit.

A presser foot for a sewing machine has a bottom wall, first and second side walls, and a guard piece. The bottom wall has front and rear ends. In addition, the bottom wall is provided with a needle-passing hole and a first slit extending from the needle-passing hole to the front end. The first side wall and the second side wall are formed integral with the bottom wall and spaced apart from each other in a width direction of the bottom wall. The guard piece is attached to the first side wall to cover the gap between the first side wall and the second side wall from above. In plan view, the guard piece is spaced from the needle-passing hole and does not overlap with the needle-passing hole. The guard piece and the second side wall are spaced apart from each other by a second slit.

A sewing system serves for sewing seams which the multi-dimensionally in space. A needle-bar upper part of a sewing head is mounted so as to be pivotable in a driven manner about a needle-bar longitudinal axis. A gripper lower part is mounted so as to be pivotable in a driven manner, and in a manner synchronous with the needle-bar upper part, about the needle-bar longitudinal axis, in the sewing-head lower part. Motor components for driving the movement of a needle bar, for pivoting the needle-bar upper part, for driving a gripper in a manner synchronous with the needle bar and for pivoting the gripper lower part are disposed outside the needle-bar upper part and outside the gripper lower part. Parts to be sewn that are topographically non-uniform are also rendered accessible.