(19)

(11)

EP 0 020 759 A1

(12)

(43) Date of publication: 07.01.1981 Bulletin 1981/01 (21) Application number: 80900216.0 (22) Date of filing: 02.01.1980

(51) International Patent Classification (IPC):  F16H 55/ 48( . ) (86) International application number: PCT/US1980/000003 (87) International publication number: WO 1980/001404 (10.07.1980 Gazette 1980/15)

(84) Designated Contracting States: DE FR GB SE (30) Priority: 02.01.1979 US 19790000319 (71) Applicant: HOOKER CHEMICALS & PLASTICS CORP. Niagara Falls New York 14302 (US)	(72) Inventor: EMMETT, John E. Farmington Hills, MI 48018 (US) (74) Representative: Myerscough, Philip Boyd  J.A.KEMP & CO. 14, South Square Gray's Inn London WC1R 5LX London WC1R 5LX (GB)