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:
Mar. 16, 2004
Filed:
Mar. 13, 2002
Pasi Ahonen, Jyväskylä, FI;
Harri Kiiskinen, Jyväskylä, FI;
Oleg Timofeev, Jyväskylä, FI;
Metso Paper, Inc., Helsinki, FI;
Abstract
An air impingement arrangement and method for compensating for the curling tendency of a paper or board web which is being treated. Air impingement is disposed in connection with a paper or board process or with its finishing process and extends across the width of the web ( ) running in the vicinity thereof, forming a contact-free web treatment zone, in which process the web is dried in at least one dryer unit ( ) that applies single-wire draw. In accordance with the invention, air impingement directed at the web ( ) is produced by the air impingement arrangement ( ) in the web treatment zone, said air impingement including, one following after the other, at least one hot blowing with air and at least one cold blowing with air. The invention also relates to a paper or board machine provided with this kind of air impingement arrangement.