Patent ID: 11952692
Assignee: PFAFF INDUSTRIESYSTEME UND MASCHINEN GMBH
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D | IPC D

Claim 0:
1. A stitch-forming tool assembly (6) for a sewing system (1) for producing a double chain stitch seam (7),
having a sewing needle (8) which can be driven up and down in a needle stitching direction (z) perpendicular to a material to be sewn and is designed to guide a needle thread (10),
having a looper (12) designed to guide a looper thread (18) and for oscillating movement in an oscillating movement plane (xz) which is spanned
by the needle stitching direction (z) and
by a sewing direction (x) along the double chain stitch seam (7),

wherein a path of movement of the looper (12) lies completely in the oscillating movement plane (xz) during an entire double chain stitch,
wherein a central longitudinal axis (19) of the sewing needle (8) is spaced from a needle point (20) of the sewing needle (8) and
wherein, when the looper (12) passes the needle point (20) during stitch formation, the central longitudinal axis (19) lies between the needle point (20) and the looper (12).