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:
Oct. 27, 2009
Filed:
Feb. 11, 2005
Kari Räisänen, Muurame, FI;
Antti Poikolainen, Jyväskylä, FI;
Kari Räisänen, Muurame, FI;
Antti Poikolainen, Jyväskylä, FI;
Metso Paper, Inc., Helsinki, FI;
Abstract
A multi-layer web formation section has at least two successive wire units (). First and second headboxes () supply pulp suspension jets to the forward end of the first wire unit () and the second wire unit respectively to form a first partial web (W) and a second partial web (W) which are joined at a joint (N) between the second wire unit () and a bottom wire (). A first non-pulsating dewatering zone (Z) in the forward end of a two-wire stretch of the second wire unit () is formed by a fixed formation shoe () having a curved cap () placed against one side, having openings with an under-pressure applied. A two-wire stretch of the second wire unit () has a second pulsating dewatering zone (Z), formed by fixed dewatering lists () in the cross machine direction with gaps () therebetween with an under-pressure (Pb) applied.