METHOD AND APPARATUS FOR THICKENING FIBER SUSPENSION - Patent 0461138

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EP 0 461 138 A1

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(43)	Date of publication:
	18.12.1991 Bulletin 1991/51

(21)	Application number: 90903595.0

(22)	Date of filing: 28.02.1990

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International Patent Classification (IPC):

D21F 1/ 18^{( . )}
D21D 5/ 16^{( . )}
D21F 1/ 74^{( . )}

D21C 9/ 18^{( . )}
D21F 1/ 66^{( . )}

(86)	International application number:
	PCT/FI1990/000056

(87)	International publication number:
	WO 1990/010110 (07.09.1990 Gazette 1990/21)

(84)	Designated Contracting States:
	DE ES FR SE

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Priority:

02.03.1989 FI 19890000988

(71)	Applicant: A. AHLSTROM CORPORATION
	FIN-29600 Noormarkku (FI)

(72)	Inventors:
	HENRICSON, Kaj SF-48100 Korka (FI) MÄKELÄ, Mika SF-49210 Huutjörvi (FI) PIKKA, Olavi SF-48600 Karhula (FI)

(74)	Representative: Görg, Klaus, Dipl.-Ing., et al
	Hoffmann, Eitle & Partner Patent- und Rechtsanwälte Postfach 81 04 20 D-81904 München D-81904 München (DE)

(54)	METHOD AND APPARATUS FOR THICKENING FIBER SUSPENSION