(19)
(11) EP 0 537 192 A1

(12)

(43) Date of publication:
21.04.1993 Bulletin 1993/16

(21) Application number: 91911007.0

(22) Date of filing: 20.06.1991
(51) International Patent Classification (IPC): 
B29C 33/ 38( . )
B29C 51/ 10( . )
B29C 43/ 12( . )
B29C 33/ 56( . )
B29C 51/ 28( . )
B29L 31/ 58( . )
(86) International application number:
PCT/FI1991/000193
(87) International publication number:
WO 1992/000176 (09.01.1992 Gazette 1992/02)
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI NL SE

(30) Priority: 02.07.1990 FI 19900003324

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

(72) Inventors:
  • LAINE, Eino
    SF-48700 Kyminlinna (FI)
  • RÖKMAN, Kay
    SF-48600 Karhula (FI)

(74) Representative: Füchsle, Klaus, Dipl.-Ing., et al 
Hoffmann, Eitle & Partner, Patentanwälte, Postfach 81 04 20
D-81904 München
D-81904 München (DE)

   


(54) METHOD OF FORMING THERMOPLASTIC MATERIALS