Patent · US Expired

Multistage disc filter

US5641402A · kind A · utility

10Cited by

9References

20Claims

0Family size

Assignee

Ahlstrom Machinery Oy · FI

Inventors

Raimo Kohonen · Savonlinna, FI
Ari Pelkiö · Savonlinna, FI

Key dates

Filing date	Aug 23, 1995
Grant date	Jun 24, 1997
Priority date	—
Expiry date	Aug 23, 2015

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S162/903
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A disc filter used in the pulp and paper industry meets modern requirements by axially dividing the tank and shaft (with the flow channels) into at least two separate and distinct portions, so that the treatment of pulp in several different stages using the same disc filter is possible.

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