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. 29, 2022
Filed:
Jun. 24, 2020
Valmet Technologies Oy, Espoo, FI;
Juan Cecchini, Jyväskylä, FI;
Juha Kivimaa, Muurame, FI;
Kari Lamminmäki, Jyväskylä, FI;
Antti Poikolainen, Jyväskylä, FI;
Valmet Technologies Oy, Espoo, FI;
Abstract
The invention relates to a method for forming a three-layer board web, preferably a folding box board (FBB) or a solid bleached (sulfate) board (SBS), in a forming section () comprising a multilayer headbox () and a forming unit (). In the method the layers of the three-layer board web are first formed of pulp suspension in the multilayer headbox () and fed to only one forming unit (), a gap former where the pulp suspension from the multilayer headbox is fed to a gap between lower and upper wires for water removal and for joining the layers of the three-layer board web and where water is first removed by a non-pulsating forming shoe ().