Patent ID: 7076979

Claim:
A method of producing curved lengths of spring bend band steel, comprising the steps of bending a spring band steel ( 10 ) which is made up of lengths of spring band steel ( 11 ) that adjoin one another and are of one piece with one another, between three support points ( 23 - 25 ), which are spaced from each other in a spring band steel advancing direction and rest against alternating band sides of the spring band steel ( 10 ); at a subsequent support point ( 32 ) downstream of the three support points ( 23 - 25 ), bending back by a lesser bending degree than during the bending by the three support points ( 23 - 25 ) in an opposite direction, cutting the length of spring band steel ( 11 ) that is bent from the spring band steel ( 10 ); establishing the subsequent support point as a movable reverse bending roller ( 33 ); and controlling a movement of the reverse bending roller ( 33 ) by a numerical control unit ( 29 ).