Patent ID: 6220192
Filing Date: 2001-04-24
Classification: D05B,D05D

Abstract:
A buttonhole sewing machine for the production of a group of buttonholes (A, B, C) on a workpiece (40), the group having at least two buttonholes (101, 104, 108) of one of varying design and size, comprisinga needle (12), which is mounted in an arm (4), andwhich is drivable to reciprocate in a Z direction by means of a driving motor (6),which is drivable by a jogging drive (23) for the production of a zigzag seam by a motion of the needle (12) relative to the workpiece (40), andwhich is drivable to pivot about an axis by means of a pivot drive (18);a hook bearing (13), which is disposed in a base plate (2), andwhich is drivable by a pivot drive (18) to pivot synchronously and equiangularly of the needle (12) about a pivot axis (17) which extends in the Z direction;a hook (14), which is disposed in the hook bearing (13);a stitch hole (47), which is allocated to the needle (12) and the hook (14);a holder (30, 39) for the workpiece (40),which holder (30, 39) is displaceable by drives (34, 37) in an X direction and a Y direction; andan operating and control unit (110);wherein devices are provided for the entry, storage and processing of information about at least one of the varying design and size of the group of buttonholes (A, B, C); andwherein a device is provided for triggering the drives for the successive production of the buttonholes (A, B, C) on the workpiece (40).