Patent ID: 7195187

Claim:
A rolling mill system comprising: a first roll and a second roll that are oppositely driven and temperature-controlled; wherein the first and second rolls each comprise a first roll half having a first end face, a second roll half having a second end face, and a roll center; wherein the first and second roll halves of the first roll have a peripheral surface provided with open grooves and ribs between the grooves; wherein the grooves of the first roll half and the grooves of the second roll half are arranged at an obtuse angle opposed to one another and symmetric to the roll center, wherein the obtuse angle is defined by a groove of the first roll half and a groove of the second roll half and wherein a width of the ribs is smaller than a width of the grooves; wherein the grooves of the roll extend continuously from the first end face to the second end face; wherein the second roll has a peripheral surface that is smooth, wherein the peripheral surface of the second roll faces the peripheral surface of the first and second roll halves of the first roll; a first cutting device arranged at the first end face of the first roll and a second cutting device arranged at the second end face of the first roll, wherein the first and second cutting devices are arranged in an area of open ends of the grooves; wherein the peripheral surface of the second roll has cylindrical areas beginning at opposite ends of the second roll and extending toward the roll center: wherein the peripheral surface of the second roll has a circumferential recess between the cylindrical areas; wherein a roll nip is defined between the first and second rolls, wherein the roll nip is almost zero at the cylindrical areas and increases within the circumferential recess to maximally 20 mm at the roll center.