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. 13, 2002
Filed:
Aug. 11, 2000
Jyrki Huovila, Muurame, FI;
Petri Nyberg, Jyväskylä, FI;
Antti Suoperä, Jyväskylä, FI;
Tapani Nyman, Karhula, FI;
Metso Paper, Inc., Helsinki, FI;
Abstract
The invention concerns a headbox for a paper/board machine by whose means the basis weight of the web can be regulated. The headbox comprises a stock inlet header (J ), which becomes narrower towards its end. Tubes ( , . . . ) in a tube bank ( ) open in the stock inlet header (J ) across the machine width, which tubes are connected with thickening elements ( , . . . ) across the machine width, in which connection a flow (L ) is removed from the thickening element into the duct (D ) and said flow (L ) to be removed is regulated by means of a valve (V , V . . . ). From the thickening element ( , . . . ) a tube ( , . . . ) for a flow (L ) of higher consistency is provided, which flow is passed further in the headbox.