(19)

(11)

EP 0 820 357 A1

(12)

(43) Date of publication: 28.01.1998 Bulletin 1998/05 (21) Application number: 96903836.0 (22) Date of filing: 07.03.1996

(51) International Patent Classification (IPC):  B07C 1/ 04( . ) B07C 3/ 08( . ) (86) International application number: PCT/AU1996/000120 (87) International publication number: WO 1996/032207 (17.10.1996 Gazette 1996/46)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 13.04.1995 AU 1995PN02444 (71) Applicants: 3M AUSTRALIA PTY. LTD. Pymble, N.S.W. 2073 (AU) MINNESOTA MINING AND MANUFACTURING COMPANY Saint Paul Minnesota 55144-1000 (US)	(72) Inventors: NAYLOR, Rick, Lynne Glenmore Park, NSW 2745 (AU) MANN, Graeme, Robert Engadine, NSW 2233 (AU) (74) Representative: Ede, Eric  Fitzpatricks, 4 West Regent Street Glasgow G2 1RS Glasgow G2 1RS (GB)