(19)
(11)EP 0 251 497 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
05.07.1989 Bulletin 1989/27

(43)Date of publication A2:
07.01.1988 Bulletin 1988/01

(21)Application number: 87304834.2

(22)Date of filing:  01.06.1987
(51)International Patent Classification (IPC)4B30B 9/24
(84)Designated Contracting States:
AT DE SE

(30)Priority: 04.06.1986 FI 862391

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

(72)Inventors:
  • Häkkinen, Seppo
    SF-57200 Savonlinna (FI)
  • Kohonen, Raimo
    SF-57230 Savolinna (FI)
  • Kyytsönen, Juhani
    S-07910 Valko (FI)

(74)Representative: Gilmour, David Cedric Franklyn et al
POTTS, KERR & CO. 15 Hamilton Square
Birkenhead Merseyside L41 6BR
Birkenhead Merseyside L41 6BR (GB)


(56)References cited: : 
  
      


    (54)Belt for a filter press


    (57) A filter press for removing excess water from a cake of slurry (3) running between two opposite cloths at endless wires (1, 2) in a paper or board making apparatus, the filter press comprising a pre-pressing section (4) and a post-pressing section (5) and a turning roll (6) disposed between said pressing sections in the transverse direction of the wires and extending substantially over the whole width of the wires, at which roll the direction of the wires is changed. One of the problems with known filter presses presently in use in that the velocity of the presses cannot be improved because of the sealing difficulties between the wires. The filter press according to the present ianvention avoids this problem as the construction of the edges (7) of at least one of the wires (2) are along the whole length of the wire stronger and inelastic.





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