Sewing installation for the production of a piped pocket opening

A sewing installation for the production of a piped pocket opening (141) on a workpiece (31, 140), comprising

• a stand (45, 46, 47);
• a working plate (2) disposed on the stand (45, 46, 47);
• a two-needle sewing machine disposed on the working plate (2);
• a workpiece advancing device (26) for the transport of the workpiece (31, 140) in a Y-direction on the working plate (2);
• a knife (11) for the production of a straight incision (143, 156) running in the Y-direction in the workpiece (31, 140) during the transport thereof in the Y-direction;
• a cutout (41) running in the Y-direction in the working plate (2);
• a cutting device (44) for the production of comer cuts (135, 136;
• 138, 139) in the workpiece (31, 140), which cutting device (44)
• is disposed underneath the cutout (41) of the working plate (2),
• is disposed in a first position underneath the cutout (41) of the working plate, and
• is provided with two comer cutting knives (42, 43);
• and
• at least one drive (107, 107') coupled with the corner knives (42, 43) for the displacement of the corner cutting knives (42, 43) in a Z-direction through the cutout (41) in the working plate (2) and through the workpiece (31, 140) placed thereon,
• wherein the cutting device (44) is supported on the stand (45, 46, 47) for pivotability from said first position into a second position in which it is at least substantially free from the working plate (2).