(19)
(11) EP 0 677 122 A1

(12)

(43) Date of publication:
18.10.1995 Bulletin 1995/42

(21) Application number: 94904362.0

(22) Date of filing: 08.12.1993
(51) International Patent Classification (IPC): 
D21B 1/ 12( . )
D21C 9/ 10( . )
D21B 1/ 14( . )
(86) International application number:
PCT/SE1993/001058
(87) International publication number:
WO 1994/016139 (21.07.1994 Gazette 1994/17)
(84) Designated Contracting States:
AT CH DE ES FR GB GR IT LI SE

(30) Priority: 30.12.1992 SE 19920003943

(71) Applicants:
  • SUNDS DEFIBRATOR INDUSTRIES AKTIEBOLAG
    S-851 94 Sundsvall (SE)
  • SCA RESEARCH AB
    S-850 03 Sundsvall (SE)

(72) Inventors:
  • HÖGLUND, Hans
    S-864 91 Matfors (SE)
  • BÄCK, Roland
    S-860 20 Njurunda (SE)
  • DANIELSSON, Ove
    S-114 45 Stockholm (SE)
  • FALK, Bo
    S-175 43 Järfälla (SE)

(74) Representative: Sundqvist, Hans, et al 
Sunds Defibrator Industries Aktiebolag Patents Dept. Strandbergsgatan 61
S-112 51 Stockholm
S-112 51 Stockholm (SE)

   


(54) A METHOD OF PRODUCING MECHANICAL AND CHEMI-MECHANICAL PULP