ALEXANDRIA, Va., June 6 -- United States Patent no. 12,281,439, issued on April 22, was assigned to Valmet Technologies Oy (Espoo, Finland).
"Blade segment for refiner" was invented by Marko Loijas (Valkeakoski, Finland) and Tomi Iisakkila (Valkeakoski, Finland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A blade segment (4, 8) for a refiner (1) for refining fibrous material has a first (20) and a second (21) end edge and a first (22) and a second (23) side edge opposite to the first side edge (22) and a refining surface (5, 9) having blade bars (27, 27a, 27b) and grooves (28, 28a, 28b) therebetween on a front surface (25). At least one opening (14, 15) is on at least at one side edge (22, 23) which extend...