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:
Sep. 19, 2017
Filed:
Jun. 16, 2015
Applicants:
Håkan Sjöström, Tampere, FI;
Matti Kaarineva, Lempäälä, FI;
Tomi Iisakkila, Valkeakoski, FI;
Inventors:
Assignee:
VALMET TECHNOLOGIES, INC., Espoo, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B02C 7/12 (2006.01); D21D 1/30 (2006.01); B02C 7/02 (2006.01);
U.S. Cl.
CPC ...
D21D 1/306 (2013.01); B02C 7/02 (2013.01); B02C 7/12 (2013.01);
Abstract
A blade segment of a disc refiner for refining fibrous material has an inner circumference and an outer circumference as well as a first side edge and a second side edge which connect the inner circumference and the outer circumference. The side edges are curved, with one convex and the other concave. The segment has a refining surface with blade bars and grooves which define a pumping direction. The side edges of the blade segment curve in the vicinity of the inner circumference in the pumping direction, and in the vicinity of the outer circumference in a non-pumping direction.