(19)

(11)

EP 0 030 974 A1

(12)

(43) Date of publication: 01.07.1981 Bulletin 1981/26 (21) Application number: 80901439.0 (22) Date of filing: 16.06.1980

(51) International Patent Classification (IPC):  G03C 1/ 805( . ) G03C 1/ 795( . ) G09F 3/ 10( . ) B41M 3/ 12( . ) G03C 11/ 12( . ) G09F 3/ 02( . ) (86) International application number: PCT/US1980/000762 (87) International publication number: WO 1980/002879 (24.12.1980 Gazette 1980/29)

(84) Designated Contracting States: DE FR GB (30) Priority: 21.06.1979 US 19790050686 (71) Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY St. Paul, Minnesota 55133-3427 (US)	(72) Inventors: LODER, Harry A. Mahtomedi, MN 55155 (US) MATHNA, Charles A. St. Paul, MN 55119 (US) (74) Representative: Baillie, Iain Cameron, et al  c/o Ladas & Parry Isartorplatz 5 D-8000 München 2 D-8000 München 2 (DE)