(19)

(11)

EP 1 937 982 A1

(12)

(43) Date of publication: 02.07.2008 Bulletin 2008/27 (21) Application number: 06779350.5 (22) Date of filing: 11.09.2006

(51) International Patent Classification (IPC):  F15B 9/09(2006.01) (86) International application number: PCT/GB2006/003332 (87) International publication number: WO 2007/029009 (15.03.2007 Gazette 2007/11)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 09.09.2005 GB 0518462 (71) Applicant: EM Digital Limited Cheshunt, Hertfordshire EN7 6UN (GB)	(72) Inventors: PERERA, Guruge, Elmo, Laksham Hertfordshire EN7 6UN (GB) RAO, Vasu Hertfordshire EN7 6UN (GB) (74) Representative: Jennings, Michael John et al A.A. Thornton & Co. 235 High Holborn GB-London WC1V 7LE GB-London WC1V 7LE (GB)