Title:
抄紙機の乾燥部における紙のカールの調整方法および紙/板紙抄紙機
Document Type and Number:
Japanese Patent JP3660360
Kind Code:
B2
Abstract:
The invention concerns a method in the dryer section of a paper or board machine for control of the curl of paper, in which method steam treatment and/or moistening of the paper web (W) is/are employed. In the method, the operations carried out in view of controlling the curl of the paper web (W) are carried out in a number of stages and/or when the web (W) temperature is lower than 85 DEG C, preferably lower than 75 DEG C, and/or when the dry solids content of the web (W) is in the range of K1...K2, wherein K1 = ultimate dry solids content - 7 % and K2 = ultimate dry solids content + 3 %. Further, the invention concerns a paper or board machine, which comprises at least a headbox, a former, a press, and a dryer section, in which steam boxes or moistening devices are employed for control of the curl. There are at least two of said curl regulation devices in view of achieving a regulation of the curl in a number of stages, and/or said curl regulation devices have been fitted to operate in an area in which the web temperature is lower than 85 DEG C, preferably lower than 75 DEG C, and/or the dry solids content of the web is in a range of K1...K2, wherein K1 = ultimate dry solids content - 7 % and K2 = ultimate dry solids content + 3 %.
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Inventors:
Ears, Besa
Yuppi, Cali
Ahonen, Pasi
Kallioniemi, Yaacco
Yuppi, Cali
Ahonen, Pasi
Kallioniemi, Yaacco
Application Number:
JP54118598A
Publication Date:
June 15, 2005
Filing Date:
March 23, 1998
Export Citation:
Assignee:
METSO PAPER INC.
International Classes:
D21F5/00; D21F5/04; D21F5/08; D21G7/00; (IPC1-7): D21F5/00; D21G7/00
Domestic Patent References:
| JP8311793A | ||||
| JP56005163A | ||||
| JP49017608B1 | ||||
| JP2001505630A |
Foreign References:
| US5557860 |
Attorney, Agent or Firm:
Takao Katori