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:
Apr. 01, 2008
Filed:
Oct. 06, 2004
Matti Kurki, Jyväskylä, FI;
Pekka Martikainen, Vaajakoski, FI;
Matti Kurki, Jyväskylä, FI;
Pekka Martikainen, Vaajakoski, FI;
Metso Paper, Inc., Helsinki, FI;
Abstract
A roll in a paper or board machine has a roll frame or center shaft () with bearings mounted at its ends and a groove-like surface structure (). There is a contact between the surface structure and the center shaft so that an essentially closed structure is formed. The roll produces a vacuum that keeps the web attached to the outer surface of a fabric in the fabric wrap area of the roll circle by utilizing the boundary layer airflows of the surface structure flow and/or of the web. A dryer group has at least one contact dryer cylinder and at least one turning roll with a single fabric run arrangement.