A sewing machine has seam-forming tools, comprising a needle for guiding an upper thread and a looper. The needle is designed as a curved needle which is pivotable about a needle pivot axis. This embodiment is such that a distance of the curved needle from the pivot axis is equal to a radius of a curve of the curved needle about the pivot axis. The looper is designed as a looper which is rotatable about a looper rotational axis and has a lower thread reserve. The looper rotational axis runs parallel to a sewing material support region. The sewing machine can be used to produce a durable seam.

A sewing machine has seam-forming tools, comprising a needle for guiding an upper thread and a looper. The needle is designed as a curved needle which is pivotable about a needle pivot axis. This embodiment is such that a distance of the curved needle from the pivot axis is equal to a radius of a curve of the curved needle about the pivot axis. The looper is designed as a looper which is rotatable about a looper rotational axis and has a lower thread reserve. The looper rotational axis runs parallel to a sewing material support region. The sewing machine can be used to produce a durable seam.

A tool designed for fixing fibers, such as natural hair, to a substrate, such as a wig cap, for making hand-tied wigs, having a shaft with two ends. A slot extends from one of the shaft ends with an open end to receive fibers. An opening extends transversely to the shaft and intersects with the slot for holding fibers as they are passed through the openings of the wig cap.

A hand sewing and knitting needle comprises an elongate body having a first end section extending from a first end to a middle section. The elongate body having a second end section beginning at the middle section and extending to the second end of the second end section. The middle section extending from a second end of the first end section to the first end of the second end section.

A hand sewing and knitting needle comprises an elongate body having a first end section extending from a first end to a middle section. The elongate body having a second end section beginning at the middle section and extending to the second end of the second end section. The middle section extending from a second end of the first end section to the first end of the second end section.

A tool designed for fixing fibers, such as natural hair, to a substrate, such as a wig cap, for making hand-tied wigs, having a shaft with two ends. A slot extends from one of the shaft ends with an open end to receive fibers. An opening extends transversely to the shaft and intersects with the slot for holding fibers as they are passed through the openings of the wig cap.

A tool designed for fixing fibers, such as natural hair, to a substrate, such as a wig cap, for making hand-tied wigs, having a shaft with two ends. A slot extends from one of the shaft ends with an open end to receive fibers. An opening extends transversely to the shaft and intersects with the slot for holding fibers as they are passed through the openings of the wig cap.

A spar for an airfoil comprises a core, e.g. a foam core, a central structural member extending through the core, an outer structural layer surrounding the core and central structural member and a plurality of yarns extending through the central structural member.

A spar for an airfoil comprises a core, e.g. a foam core, a central structural member extending through the core, an outer structural layer surrounding the core and central structural member and a plurality of yarns extending through the central structural member.

A sewing machine has seam-forming tools, comprising a needle for guiding an upper thread and a looper. The needle is designed as a curved needle which is pivotable about a needle pivot axis. This embodiment is such that a distance of the curved needle from the pivot axis is equal to a radius of a curve of the curved needle about the pivot axis. The looper is designed as a looper which is rotatable about a looper rotational axis and has a lower thread reserve. The looper rotational axis runs parallel to a sewing material support region. The sewing machine can be used to produce a durable seam.