Global patent index - EP 1087840 A1

EP 1087840 A1 2001-04-04 - METHOD AND APPARATUS FOR PROCESSING PULP STOCK DERIVED FROM A PULP OR PAPER MILL

Title (en)

METHOD AND APPARATUS FOR PROCESSING PULP STOCK DERIVED FROM A PULP OR PAPER MILL

Title (de)

VERFAHREN UND VORRICHTUNG ZUR BEHANDLUNG VON PAPIERFASERSTOFF AUS ZELLSTOFF- ODER PAPIERFABRIKEN

Title (fr)

PROCEDE ET APPAREIL DE TRAITEMENT DE PULPE D'UNE USINE DE PATE OU DE PAPIER

Publication

EP 1087840 A1 (EN)

Application

EP 99915779 A

Priority

  • FI 9900306 W
  • FI 980849 A
  • FI 981627 A
  • FI 981788 A

Abstract (en)

[origin: WO9954045A1] The object of the invention is a method for processing pulp stock derived from a pulp or paper mill, which pulp stock contains fibres and/or any other components, such as mineral components, in order to disperse the agglomerations in the pulp stock. The method is characterised in that the pulp stock is supplied to an apparatus operating according to the principle of a double action impact mill (the double action impact mill (20)). The apparatus comprises: a first rotor (11) provided with blades; a second rotor (12), which is coaxial with the first rotor and provided with blades and which is arranged to rotate in a direction being opposite to that of the first rotor; and a feeding opening (14) which opens out to the nave of the rotors. Pulp stock is supplied to the feeding opening (14) which opens to the rotor naves and is caused to flow via the blades of the rotors (11, 12) arranged within each other, to the outermost rotor ring, and to be discharged from there as a discharge flow from the apparatus. The invention also relates to an apparatus for performing the method.

IPC 1-7 (main, further and additional classification)

B02C 7/12; D21B 1/14; D21D 1/30

IPC 8 full level (invention and additional information)

B02C 13/20 (2006.01); D21B 1/30 (2006.01); D21D 1/36 (2006.01)

CPC (invention and additional information)

B02C 13/205 (2013.01); B02C 13/24 (2013.01); D21B 1/30 (2013.01); D21D 1/36 (2013.01)

Citation (search report)

See references of WO 9954045A1

Designated contracting state (EPC)

AT BE CH DE ES FI FR GB IT LI NL PT SE

EPO simple patent family

WO 9954045 A1 19991028; WO 9954045 A8 20000106; AU 3423199 A 19991108; CA 2328205 A1 19991028; EP 1087840 A1 20010404

INPADOC legal status

2003-07-02 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20021101

2001-09-12 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: MEGATREX OY

- Ref Legal Event Code: RAP1

2001-04-04 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20001031

2001-04-04 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH DE ES FI FR GB IT LI NL PT SE