公开(公告)号：US20230003509A1

公开(公告)日：2023-01-05

申请号：US17757253

申请日：2020-12-18

Applicant: Stora Enso OYJ

Inventor： Ari Jäsberg ,  Riku Pihko ,  Otto Nylén

IPC: G01B11/06 ,  G01N21/84 ,  G01B11/02 ,  D21F1/80 ,  C08J5/18 ,  C08L1/02 ,  D21H11/18

Abstract: The present document discloses a method of determining thickness of a wet film, in particular of microfibrillated cellulose. The method comprises conveying said film (20) in a wet state on a conveyor (10) having a conveyor width, the wet film having a film width which is less than the conveyor width, providing a laser projection (1511) across a film edge, acquiring a series of images, each depicting an area of the conveyor, wherein the laser projection, a portion of the film and a portion of an exposed conveyor surface are visible, and using at least some of said images to determine at least one of a film thickness and a film thickness distribution across the film width. The document also discloses a method of forming a film, in particular a microfibrillated cellulose film, and a device for producing such film.