| 摘要 |
Reconditioning is performed such that the curvature of the arcuate surface of the crest 12 on the upper corrugating roll 10 is increased as compared before conditioning. Further, reconditioning is performed such that the curvature of the arcuate surface of the crest 22 on the lower corrugating roll 20 is increased as compared before conditioning. In this step, polishing is performed so as to maintain the maximum diameter of the crest 12 on the upper corrugating roll 10 as much as possible. Thereby, since the length of the inclined surface of the corrugating roll connecting between a crest and a trough of the upper and lower corrugating rolls 10 and 20 is reduced, the rate of the increase in the consumption of corrugated mediums "d" of fluted corrugated mediums "e" for double-faced corrugated cardboard sheets "j" shaped by the upper and lower corrugating rolls 10 and 20 after reconditioning can be reduced. |
