| 摘要 |
PROBLEM TO BE SOLVED: To provide an inner diameter correcting head having a wide range of applicability and applicable to a paper pipe with a turnup. SOLUTION: The inner diameter correcting head has a fixed ring 11 fixed to the tip end of a supporting tube 14, a driving ring 12 mounted on a drive shaft 15 inserted in the supporting tube 14 and located in front of the fixed ring 11, and a correcting ring 13 resiliently commonly mated with the fixed ring 11 and the driving ring 12. COPYRIGHT: (C)2006,JPO&NCIPI
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