(19)

(11)

EP 0 236 305 A1

(12)

(43) Date of publication: 16.09.1987 Bulletin 1987/38 (21) Application number: 85904694.0 (22) Date of filing: 13.09.1985

(51) International Patent Classification (IPC):  G01N 33/ 48( . ) G01N 33/ 483( . ) (86) International application number: PCT/SE1985/000349 (87) International publication number: WO 1987/001809 (26.03.1987 Gazette 1987/07)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (71) Applicants: SVENSSON, Jan Axel S-561 35 Huskvarna (SE) HOOGERVORST, Nicolaas Wouterus Wilhelmus NL-2461 Leteraar (NL)	(72) Inventors: SVENSSON, Jan Axel S-561 35 Huskvarna (SE) HOOGERVORST, Nicolaas Wouterus Wilhelmus NL-2461 Leteraar (NL)