(19)

(11)

EP 0 846 313 A1

(12)

(43) Date of publication: 10.06.1998 Bulletin 1998/24 (21) Application number: 96927073.0 (22) Date of filing: 22.08.1996

(51) International Patent Classification (IPC):  G08B 13/ 24( . ) (86) International application number: PCT/FI1996/000452 (87) International publication number: WO 1997/008670 (06.03.1997 Gazette 1997/11)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 23.08.1995 FI 19950003959 (71) Applicant: TUOTESUOJA SIRPA JÄRVENSIVU KY 37800 Toijala (FI)	(72) Inventors: SEPPÄ, Heikki FIN-00370 Helsinki (FI) JAAKKOLA, Olli FIN-00520 Helsinki (FI) (74) Representative: Holmström, Stefan Mikael, et al  Kolster Oy Ab, Iso Roobertinkatu 23, P.O. Box 148 00121 Helsinki 00121 Helsinki (FI)