(19)

(11)

EP 0 368 937 A1

(12)

(43) Date of publication: 23.05.1990 Bulletin 1990/21 (21) Application number: 88909246.0 (22) Date of filing: 13.06.1988

(51) International Patent Classification (IPC):  D21F 5/ 04( . ) (86) International application number: PCT/US1988/002019 (87) International publication number: WO 1989/001073 (09.02.1989 Gazette 1989/04)

(84) Designated Contracting States: AT DE FR GB IT SE (30) Priority: 23.07.1987 GB 19870017387 19.10.1987 US 19870110405 (71) Applicant: BELOIT CORPORATION Beloit Wisconsin 53511 (US)	(72) Inventor: WELSBY, John 8 Lyndon Avenue Wigan (GB) (74) Representative: Schmitz, Jean-Marie, et al  Dennemeyer & Associates Sàrl P.O. Box 1502 L-1015 Luxembourg L-1015 Luxembourg (LU)