| 摘要 |
PROBLEM TO BE SOLVED: To prevent the vertical warpage of double-faced corrugated cardboard produced in the outlet part of a double facer and its warpage with the passage of time after it is loaded on a stacker. SOLUTION: A humidified air forming zone 31 is made to face one side of single-faced corrugated cardboard k and liner paper n overlapping each other in the inlet part or the outlet part of the heating part of the double-facer or in the outlet part of a cooling part, a negative pressure (equal to or less than the atmospheric pressure) forming zone 36 is made to face the counter surface counter to the humidified air forming zone 31, and the humidified air of the zone 31 is sucked to the zone 36 through single-faced corrugated cardboard k and the liner paper n. In the inlet part of the double-facer heating part, steam is used as humidified air to supplement a heating effect. COPYRIGHT: (C)2008,JPO&INPIT
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