Patent ID: 6230637
Filing Date: 2001-05-15
Classification: D05B

Abstract:
A sewing installation for the production of a piped pocket opening (98, 101) on a workpiece (31), comprisinga working plate (2);a two-needle sewing machine (3) disposed on the working plate (2);a workpiece advancing device (26) for the transport of the workpiece (31) in a Y-direction on the working plate (2);a knife (11) for the production of a straight incision (103) running in the Y-direction in the workpiece (31) 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 corner cuts (96, 97; 99, 100) in the workpiece (31), which cutting device (44)is disposed underneath the cutout (41) of the working plate (2),comprises a first and a second cutting unit (52, 53), which are adjustable relative to each other in the Y-direction, anda drive (54) for the adjustment relative to each other of the first and the second cutting unit (52, 53);a first corner cutting knife (43), which is disposed on the first cutting unit (52), and a second corner cutting knife (42), which is disposed on the second cutting unit (53), each of the first and second corner cutting knives (43, 42) comprisinga first knife (82),a second knife (83), anda cutting point (87),at least one knife (82, 83) being adjustable in a pivot guide to pivot about an axis (76) which intersects the cutting point (87) and runs in an X-direction;at least one drive (71) disposed on the first and the second cutting unit (52, 53) for the displacement of the corner cutting knives (42, 43) by a uniform stroke in a Z-direction through the cutout (41) in the working plate (2) and through the workpiece (31) resting thereon;at least one drive (66, 67) disposed on each cutting unit (52, 53) for the pivotal adjustment of at least one knife (82, 83) relative to the cutting unit (52, 53); anda control unit for triggering the drives (54, 66, 67, 71).