The device for stamping carton blanks from card comprises an upper positive element (1) and a lower negative element (3). The upper element consists of a frame with the blanking and chamfering knife (2) attached to it by retaining and adjustment screws (9). The lower element consists of a metal plate. Lugs (11,12,13) are provided for the positioning of the upper and lower elements. The positioning lugs are made in such a way as to be adjustable by hand operated elements (15,16,17). If required the adjustment can be done automatically by a motor.
