(19)

(11)

EP 2 004 877 A2

(12)

(88) Date of publication A3: 28.02.2008 (43) Date of publication: 24.12.2008 Bulletin 2008/52 (21) Application number: 07732265.9 (22) Date of filing: 02.04.2007

(51) International Patent Classification (IPC):  C25B 1/30(2006.01) (86) International application number: PCT/GB2007/001214 (87) International publication number: WO 2007/128960 (15.11.2007 Gazette 2007/46)

(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 MT NL PL PT RO SE SI SK TR (30) Priority: 11.04.2006 GB 0607279 (71) Applicant: Dyson Technology Limited Malmesbury, Wiltshire SN16 0RP (GB)	(72) Inventors: BROWN, Nathan, Charles Malmesbury, Wiltshire SN16 0RP (GB) FANG, Chaoying Malmesbury, Wiltshire SN16 0RP (GB) (74) Representative: Booth, Andrew Steven  Dyson Technology Limited Intellectual Property Department Tetbury Hill GB-Malmesbury, Wiltshire SN16 0RP GB-Malmesbury, Wiltshire SN16 0RP (GB)