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. 11, 2025
Filed:
May. 10, 2021
Applicant:
Stora Enso Oyj, Helsinki, FI;
Inventors:
Isto Heiskanen, Imatra, FI;
Kaj Backfolk, Lappeenranta, FI;
Assignee:
Stora Enso OYJ, Helsinki, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21F 1/80 (2006.01); D21F 11/02 (2006.01); D21H 11/18 (2006.01);
U.S. Cl.
CPC ...
D21F 1/80 (2013.01); D21F 11/02 (2013.01); D21H 11/18 (2013.01);
Abstract
The present invention relates to a method for manufacturing a web or film comprising highly refined cellulose fibers in a paper machine, the method comprising the steps of: a) forming a wet web by applying an aqueous pulp suspension comprising highly refined cellulose fibers on a wire; and b) dewatering the wet web on the wire to obtain a dewatered web comprising highly refined cellulose fibers, wherein the dewatering comprises membrane assisted dewatering using a gas permeable membrane temporarily applied to the wet web, wherein the gas permeable membrane has a lower air permeability than the wire.