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:
Nov. 08, 2005
Filed:
May. 03, 2001
Markku Ronnila, Huutjärvi, FI;
Jaakko Jantunen, Karhula, FI;
Erkki Ilmoniemi, Vaajakoski, FI;
Metso Paper, Inc., Helsinki, FI;
Abstract
A headbox, for example, in a pulp or board machine, is suitable for high basis weights which are over 400 g/mand for high fiber suspension consistencies which are in a range of 2–5%. The headbox has a turbulence part (), into which a fiber suspension flows from a tube bank (), and a slice part () which is situated after the turbulence part and from which the fiber suspension flows to a forming section of a fibrous web. The turbulence part () of the headbox has at least two passages (), which converge in the flow direction of the fiber suspension towards the slice part (). In that connection, the fiber suspension flow is first fluidized in a tortuous turbulence passage part () and, after that, it decelerates in another widening deceleration passage ().