Method and apparatus for rolling flat strip

Claim 1

IN A METHOD OF ROLLING METALLIC STRIP MATERIAL WHEREIN THE STRIP IS CHARACTERIZED BY ADJACENT TRANSVERSE PORTIONS ELONGATED TO DIFFERENT DEGREES LONGITUDINALLY OF THE STRIPS, WHICH CONDITION CAUSES THE PORTION SUBJECTED TO GREATER ELONGATION TO BECOME NON-FLAT, THE STEPS COMPRISING: PASSING THE STRIP BETWEEN A FIRST PAIR OF ROLLS TO ROLL THE STRIP, PASSING THE ROLLED STRIP BETWEEN A SECOND PAIR OF ROLLS WHEREIN THE STRIP IS FORCEABLY CONTACTED BY SAID ROLLS CONTROLLING THE CONTACT PRESSURE OF SAID SECOND PAIR OF ROLLS IN A MANNER THAT THE REDUCTION IN THICKNESS OF THE STRIP TAKEN BY SAID SECOND PAIR OF ROLLS IS SUBSTANTIALLY ZERO, CONTROLLING THE RESPECTIVE SPEEDS OF SAID TWO PAIRS OF ROLLS TO IMPOSE UPON THE STRIP A TENSION THAT WILL CONTRIBUTE TO THE ROLLING OF THE STRIP BY SAID FIRST PAIR OF ROLLS IN A MANNER THAT THE DIFFERENCES IN ELONGATION OF SAID PORTIONS WILL BE REDUCED AND THE NONFLATNESS REMOVED, CREATING TWO DIFFERENT TENSION ZONES AFTER THE STRIP LEAVES THE SECOND PAIR OF ROLLS, WHEREIN THE TENSION UPON THE STRIP IN THE FIRST ZONE CLOSEST TO THE SECOND PAIR OF ROLLS IS MAINTAINED OF AN ORDER TO MILITATE AGAINST ANY REDUCTION BEING TAKEN BY SAID SECOND PAIR OF ROLLS AND THE TENSION UPON THE STRIP IN THE SECOND ZONE FURTHEST AWAY FROM THE SECOND PAIR OF ROLLS IS MAINTAINED OF AN ORDER SUFFICIENT TO CAUSE THE STRIP TO BE TIGHTLY FORMED INTO A COIL, AND COILING SAID STRIP AFTER IT LEAVES SAID SECOND TENSION ZONE.