The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 2008
Filed:
Jun. 16, 2003
Antti Heikkinen, Helsinki, FI;
Harri Kuosa, Järvenpää, FI;
Pekka Linnonmaa, Järvenpää, FI;
Hannu Lätti, Järvenpää, FI;
Markku Kyytsönen, Numminen, FI;
Markko Jaakkola, Järvenpää, FI;
Antti Heikkinen, Helsinki, FI;
Harri Kuosa, Järvenpää, FI;
Pekka Linnonmaa, Järvenpää, FI;
Hannu Lätti, Järvenpää, FI;
Markku Kyytsönen, Numminen, FI;
Markko Jaakkola, Järvenpää, FI;
Metso Paper, Inc., Helsinki, FI;
Abstract
The moisture profile and/or moisture gradient of a paper web of at least SC quality paper is controlled in a paper machine comprising a calender () which has at least two roll stacks (), one stack has at least three rolls and another has at least five rolls. The web is moisturized to a desired pre-moisture content Mby a pre-moisturizer () before the calender. At least one intermediate moisturizer () is arranged between two roll stacks moisturizes the web to a desired intermediate moisture content Mbefore the last roll stack (), in which the web is dried to a desired final moisture value M. For continuously controlling and optimizing the moisture profile and/or moisture gradient of the web, the pre-moisturizing Wof the web is controlled by a pre-moisturizer () control parameter which corresponds to the final moisture value Mof the web.