(19)

(11)

EP 0 500 603 A1

(12)

(43) Date of publication: 02.09.1992 Bulletin 1992/36 (21) Application number: 90916092.0 (22) Date of filing: 24.10.1990

(51) International Patent Classification (IPC):  F15D 1/ 02( . ) F24F 13/ 24( . ) F24F 13/ 08( . ) (86) International application number: PCT/GB1990/001631 (87) International publication number: WO 1991/006812 (16.05.1991 Gazette 1991/11)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 28.10.1989 GB 19890024327 (71) Applicant: GILBERTS (BLACKPOOL) LIMITED Blackpool, Lancashire FY4 4QT (GB)	(72) Inventor: MAWDSLEY, John, James Lancashire PR8 4RL (GB) (74) Representative: Pidgeon, Robert John, et al  Appleyard Lees & Co. 15 Clare Road Halifax West Yorkshire HX1 2HY Halifax West Yorkshire HX1 2HY (GB)