(19)
(11) EP 0 423 091 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.03.1992 Bulletin 1992/13

(43) Date of publication A2:
17.04.1991 Bulletin 1991/16

(21) Application number: 90850321.2

(22) Date of filing: 01.10.1990
(51) International Patent Classification (IPC)5: D21D 1/22, D21D 1/30
(84) Designated Contracting States:
AT DE FR GB IT SE

(30) Priority: 05.10.1989 FI 894729

(71) Applicant: SUNDS DEFIBRATOR JYLHÄ OY
SF-37601 Valkeakoski (FI)

(72) Inventor:
  • Lumiainen,Jorma
    SF-37630 Valkeakoski (FI)

(74) Representative: Roth, Ernst Adolf Michael et al
GÖTEBORGS PATENTBYRA AB Box 5005
S-402 21 Göteborg
S-402 21 Göteborg (SE)


(56) References cited: : 
   
       


    (54) Refiner for the refining of paper pulps and the like


    (57) A refiner for the refining of paper pulps or the like, comprising oppositely placed refiner blades (2, 3), at least one of which rotates, an intake (11) for the pulp to be refined and an outlet (12) for the refined pulp. A drawback with conventional refiners is that the pulp fed into the refiner is not refined uniformly because there is no provision for selecting the pulp fractions to be refined. The invention solves this problem in that one or more of the refiner blades (2, 3) are provided with one or more top separators (6) which are at least partially conical and fixedly connected to the blades.







    Search report