(19)

(11)

EP 0 400 101 A1

(12)

(43) Date of publication: 05.12.1990 Bulletin 1990/49 (21) Application number: 89905357.0 (22) Date of filing: 10.04.1989

(51) International Patent Classification (IPC):  F23D 11/ 42( . ) F23D 11/ 44( . ) (86) International application number: PCT/US1989/001502 (87) International publication number: WO 1989/009911 (19.10.1989 Gazette 1989/25)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 11.04.1988 US 19880179607 (71) Applicant: CLAPP, Clarence, P Danville, IL 61832 (US)	(72) Inventor: CLAPP, Clarence, P Danville, IL 61832 (US) (74) Representative: Geering, Keith Edwin, et al  REDDIE & GROSE 16 Theobalds Road London WC1X 8PL London WC1X 8PL (GB)