Patent ID: 7334446

Claim:
Method for producing a strip-like pre-material from metal by means of rollers of a roll stand, which define a roll gap, by rolling a metal strip in at least two rolling steps, characterised in that a profile is rolled discontinuously into the metal strip in successive steps between the same two rollers said method comprising (a) rolling a section of the metal strip in a first step (b) recalling the metal strip by a length which is selected to be shorter than the circumference of the rollers and (c) rolling the metal strip at least one again in a subsequent step within the section of the strip which has been rolled in the preceding step, and (d) rolling a subsequent section of the metal strip by performing steps (a) to (c) in said subsequent section, the profile extending over the full width of the metal strip and having a metal-strip thickness varying over the length of the metal strip, whereby said metal strip is divided into a series of sections, each of which is rolled at least twice before a subsequent section is rolled.