Patent · US Active

Refining surface for a refiner

US9050602B2 · kind B2 · utility

1Cited by

3References

23Claims

0Family size

Assignee

Valmet Technologies, Inc. · FI

Inventors

Ville Ruola · Helsinki, FI
Christer Hedlund · Katrineholm, SE

Key dates

Filing date	Mar 16, 2010
Grant date	Jun 9, 2015
Priority date	—
Expiry date	Aug 29, 2032

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21D1/306
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A refining surface (1, 2) of a refiner for defibrating lignocellulose-containing material has a feed edge (14) and a discharge edge (15) and has a first blade groove (17a) and a second blade groove (17b), with a blade bar (16) therebetween. A distance (D, D17a, D17b) of the bottom (18) of the first blade groove (17a) and the second blade groove (17b) from an upper surface (16a) of the blade bar (16) is arranged, at least in a part, to change substantially continuously in a direction of travel (A) of the blade grooves. The distance of the bottom of the second blade groove from the upper surface of the blade bar deviates from the distance of the bottom of the first blade groove from the upper surface of the blade bar at substantially the same distance (SD) from the feed edge of the refining surface.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.