ALEXANDRIA, Va., May 5 -- United States Patent no. 12,618,195, issued on May 5, was assigned to Valmet Technologies Inc. (Espoo, Finland).
"Press felt" was invented by Viivi Villa-Nuottajarvi (Espoo, Finland), Kati Mikkonen (Espoo, Finland), Jorma Naamanka (Espoo, Finland), Susanna Moisio (Espoo, Finland), Juha Hynninen (Espoo, Finland) and Leena Silakoski (Espoo, Finland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A press felt (100) has a seam and a web-side and a machine-side. The press felt (100) has a first fiber layer (131) on the web-side, a second fiber layer (132) on the machine-side, and at least one woven base fabric (110) and at least one spiral fabric (120) between the fiber layers (131, 132)....