(19)
(11) EP 0 261 117 A1

(12)

(43) Date of publication:
30.03.1988 Bulletin 1988/13

(21) Application number: 86903389.0

(22) Date of filing: 19.05.1986
(51) International Patent Classification (IPC): 
B01D 29/ 17( . )
B01D 29/ 37( . )
D21D 5/ 02( . )
B01D 29/ 25( . )
B01D 29/ 62( . )
D21D 5/ 16( . )
(86) International application number:
PCT/FI1986/000051
(87) International publication number:
WO 1986/007105 (04.12.1986 Gazette 1986/26)
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI LU NL SE

(30) Priority: 29.05.1985 US 19850738743

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

(72) Inventors:
  • FREJBORG, Frey
    Glens Falls, NY 12801 (US)
  • LAMPENIUS, Harry
    SF-48600 Karhula (FI)

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

   


(54) A ROTATING ELEMENT FOR A SCREENING APPARATUS WITH A CONTOUR SURFACE