(19)

(11)

EP 0 858 590 A1

(12)

(43) Date of publication: 19.08.1998 Bulletin 1998/34 (21) Application number: 96938678.0 (22) Date of filing: 01.11.1996

(51) International Patent Classification (IPC):  G01N 3/ 08( . ) G01N 33/ 38( . ) G01N 3/ 00( . ) G01N 15/ 08( . ) G01N 15/ 00( . ) G01N 35/ 00( . ) G01N 3/ 02( . ) (86) International application number: PCT/US1996/017387 (87) International publication number: WO 1997/016716 (09.05.1997 Gazette 1997/20)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV RO SI (30) Priority: 03.11.1995 US 19950007235P 19.04.1996 US 19960015848P (71) Applicant: Hartley Controls Corporation Neenah, WI 54956 (US)	(72) Inventors: THOMAS, Perry, L. Fremont, WI 54940 (US) ROETHLISBERGER, Ronald, W. Seymour, WI 54165 (US) (74) Representative: Harvey, David Gareth, et al  Graham Watt & Co. Riverhead Sevenoaks Kent TN13 2BN Sevenoaks Kent TN13 2BN (GB)