(19)

(11)

EP 2 446 424 A1

(12)

(43) Date of publication: 02.05.2012 Bulletin 2012/18 (21) Application number: 10714617.7 (22) Date of filing: 12.04.2010

(51) International Patent Classification (IPC):  G07F 11/00(2006.01) G07F 9/10(2006.01) G07F 11/58(2006.01) F25D 31/00(2006.01) (86) International application number: PCT/EP2010/054767 (87) International publication number: WO 2010/149402 (29.12.2010 Gazette 2010/52)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 25.06.2009 GB 0911110 16.11.2009 GB 0919991 (71) Applicant: Cambridge Design Research LLP Cambridge, Cambridgeshire CB23 2RF (GB)	(72) Inventors: CANE, Michael Roger Cambridge Cambridgeshire CB23 2RF (GB) FOSTER, David John Cambridge Cambridgeshire CB23 2RF (GB) (74) Representative: Martin, Philip John  Marks & Clerk LLP 62-68 Hills Road Cambridge CB2 1LA Cambridge CB2 1LA (GB)