(19)

(11)

EP 0 197 083 A1

(12)

(43) Date of publication: 15.10.1986 Bulletin 1986/42 (21) Application number: 85904928.0 (22) Date of filing: 03.10.1985

(51) International Patent Classification (IPC):  B24D 11/ 02( . ) (86) International application number: PCT/US1985/001825 (87) International publication number: WO 1986/002306 (24.04.1986 Gazette 1986/09)

(84) Designated Contracting States: CH DE FR GB IT LI SE (30) Priority: 09.10.1984 US 19840658767 20.06.1985 US 19850746869 (71) Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY St. Paul, Minnesota 55133-3427 (US)	(72) Inventors: HANSEN, Paul, E. Saint Paul, MN 55133 (US) ROELOFS, Glenn, E. Saint Paul, MN 55133 (US) (74) Representative: Baillie, Iain Cameron, et al  c/o Ladas & Parry Altheimer Eck 2 D-80331 München D-80331 München (DE)