Method of rolling metal strip to control surface roughness

Claim 1

A CONTINUING PRODUCTION METHOD OF ROLLING METAL STRIP TO PRODUCE FINISHED STRIP HAVING A PREDETERMINED SURFACE ROUGHNESS CHARACTERIZED BY A NUMBER WITHIN A PREDETERMINED RANGE OF ROUGHNESS PEAKS PER LINEAR INCH ALONG A PREDETERMINED DIRECTION OF THE SURFACE, COMPRISING THE STEPS OF: (1) PREPARING A WORK ROLL HAVING A PREDETERMINED SURFACE CONFIGURATIION INVERSELY CORRESPONDING TO SAID PREDETERMINED SURFACE ROUGHNESS AND DESIGNED TO IMPRESS SAID PREDETERMINED ROUGHNESS ON METAL STRIP ROLLED BY SAID ROLL; (2) ROLLING SUCCESSIVE METAL STRIPS WITH SAID ROLL TO PRODUCE PRODUCT STRIPS HAVING SAID ROUGHNESS; (3) SAMPLING SAID PRODUCT STRIPS BY COUNTING THE NUMBER OF PEAKS PER LINEAR INCH IN SAID PREDETERMINED DIRECTION; (4) INTERRUPTING PRODUCTION OF SAID PRODUCT STRIPS WITH SAID WORK ROLL WHENEVER SAID NUMBER OF PEAKS IS OUTSIDE ITS PREDETERMINED RANGE; (5) RESUMING PRODUCTION WITH ANOTHER WORK ROLL HAVING THE AFORESAID PREDETERMINED SURFACE CONFIGURATION SO AS TO MAINTAIN ON SUCCESSIVELY PRODUCED STRIPS THE AFORESAID PREDETERMINED ROUGHNESS.