(19)

(11)

EP 0 209 580 A1

(12)

(43) Date of publication: 28.01.1987 Bulletin 1987/05 (21) Application number: 86900979.0 (22) Date of filing: 21.01.1986

(51) International Patent Classification (IPC):  B02C 19/ 00( . ) (86) International application number: PCT/US1986/000122 (87) International publication number: WO 1986/004527 (14.08.1986 Gazette 1986/18)

(84) Designated Contracting States: BE FR IT (30) Priority: 31.01.1985 US 19850697042 (71) Applicant: CP COAL MILLS, INC. Coralville, IA 52241 (US)	(72) Inventor: WILEY, Allen, C. Coralville, IA 52241 (US)