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This TIP describes a procedure for checking the parallel of corrugating rolls in a single facer using two-ply NCR paper. The impressions made on the paper by the corrugating roll flute tips are then compared to evaluate parallelism. 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 ply NCR copy paper.

Parallel roll impressions. (Fig. 5)

Date of Publication: February 29, 2024

Purchasing Link: TIP 0304-62, Checking the Parallel of Corrugating Rolls with Two-Ply Noncarbon Paper (NCR)

Working Group Members:

Tom Staal – Chair, Coastal Container
Glenn Rogers, Pratt Industries
Joe Slattery, Fosber America

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