CHECKING THE PARALLEL OF CORRUGATING ROLLS WITH “NCR”

• This procedure recommends taping the strips of NCR paper to a corrugating roll so that it passes between the nip while the machine is locked out and tagged out (LOTO) and then jogging the rolls until the taped end comes out of the nip.
• Misaligned or out of parallel corrugator rolls can result in medium fracture, leaning flutes, and hi-lows. It can also reduce the “life” of corrugator rolls and the drive motor.
• The simplest method of checking the parallel of corrugator rolls is to use two copy “no carbon required” or NCR paper.

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