(19)

(11)

EP 0 464 110 A1

(12)

(43) Date of publication: 08.01.1992 Bulletin 1992/02 (21) Application number: 90905400.0 (22) Date of filing: 22.03.1990

(51) International Patent Classification (IPC):  D21C 9/ 10( . ) (86) International application number: PCT/CA1990/000097 (87) International publication number: WO 1990/011403 (04.10.1990 Gazette 1990/23)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 23.03.1989 CA 19890594763 (71) Applicant: HYMAC LTD. Laval, Quebec H7L 3S4 (CA)	(72) Inventors: BARBE, Michel Candiac, Quebec J5R 3N2 (CA) GAGNE, Carole Trois-Rivières-Ouest, Quebec G8Y 6A6 (CA) LEDUC, Céline Trois-Rivières, Quebec G9A 5E1 (CA) DANEAULT, Claude Trois-Rivières, Quebec G9A 5E1 (CA) (74) Representative: Strehl Schübel-Hopf Groening & Partner  Maximilianstrasse 54 D-80538 München D-80538 München (DE)