(19)

(11)

EP 0 222 829 A1

(12)

(43) Date of publication: 27.05.1987 Bulletin 1987/22 (21) Application number: 86903075.0 (22) Date of filing: 28.04.1986

(51) International Patent Classification (IPC):  C23F 13/ 00( . ) C25B 11/ 03( . ) C23F 13/ 02( . ) C25C 7/ 02( . ) (86) International application number: PCT/US1986/000933 (87) International publication number: WO 1986/006759 (20.11.1986 Gazette 1986/25)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 07.05.1985 US 19850731420 (71) Applicant: ELTECH SYSTEMS CORPORATION Boca Raton Florida 33434 (US)	(72) Inventors: BENNETT, John, E. Painesville, OH 44077 (US) POHTO, Gerald, R. Mentor, OH 44060 (US) MITCHELL, Thomas, A. Mentor, OH 44060 (US) (74) Representative: Cronin, Brian Harold John, et al  c/o DST SA 9, Route de Troinex CH-1227 Carouge/GE CH-1227 Carouge/GE (CH)