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:
Feb. 17, 2009
Filed:
May. 02, 2006
Antti Poikolainen, Jyväskylä, FI;
Marko J. Moilanen, Vesanka, FI;
Kari Lamminmäki, Jyväskylä, FI;
Metso Paper, Inc., Helsinki, FI;
Abstract
A forming section of a paper or board machinein the forming section of a paper or board machine has a coverhaving an outlet groovebetween a suction zoneof circular holes and an outlet edge. A wire comes to the cover area from an inlet edgeand leaves from an outlet edge. The outlet grooveis essentially in the cross-machine direction of the cover. The suction zone accomplishes non-pulsating dewatering, and the outlet groove accomplishes pulsating dewatering. The non-pulsating suction zone first accomplishes good retention, and after this formation is improved on the outlet groove. When pulsating dewatering takes place in the same direction as non-pulsating dewatering and immediately after non-pulsating dewatering, the web formed has a particularly good formation potential. Potential marking caused by non-pulsating dewatering can also be removed efficiently by means of pulsating dewatering taking place on the same side.