Buttonhole sewing machine

摘要

A buttonhole sewing machine comprises a top arm ( 1 ) with a needle ( 6 ) movable in up and down reciprocation and a base plate ( 2 ). A buttonhole cutting device ( 13 ) is provided, having a knife ( 36 ) which is disposed on the base plate ( 2 ) and comprises a straight cutting edge ( 37 ) that extends in the y direction and an eye cutting edge ( 38 ). A cutting block ( 15 ) cooperates with the knife ( 36 ). The knife ( 36 ) and the cutting block ( 15 ) are motor-adjustable one in relation to the other in the y direction.