(19)

(11)

EP 1 756 476 A2

(12)

(88) Date of publication A3: 22.06.2006 (43) Date of publication: 28.02.2007 Bulletin 2007/09 (21) Application number: 05740588.8 (22) Date of filing: 04.05.2005

(51) International Patent Classification (IPC):  F23K 5/16(2006.01) G08B 17/10(2006.01) G08B 25/06(2006.01) F23N 5/24(2006.01) G08B 17/00(2006.01) (86) International application number: PCT/GB2005/001675 (87) International publication number: WO 2005/124711 (29.12.2005 Gazette 2005/52)

(84) Designated Contracting States: DE FR GB (30) Priority: 15.06.2004 GB 0413355 (71) Applicant: POLYGONS LTD. Chatham, Kent ME4 4NP (GB)	(72) Inventors: PEARSON, Mark Bearsted, Maidstone ME14 4DY (GB) RUSSELL, Alister Torvil, Maidstone ME15 6UD (GB) (74) Representative: Anderson, James Edward George  Elkington and Fife LLP Prospect House 8 Pembroke Road Sevenoaks, Kent TN13 1XR Sevenoaks, Kent TN13 1XR (GB)