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EP 2 753 901 A1

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(43) Date of publication: 16.07.2014 Bulletin 2014/29 (21) Application number: 12775278.0 (22) Date of filing: 07.09.2012

(51) International Patent Classification (IPC):  G01F 23/26(2006.01) G01N 33/38(2006.01) C03B 5/16(2006.01) G01V 3/10(2006.01) G01N 27/06(2006.01) G01B 7/06(2006.01) F27D 21/00(2006.01) (86) International application number: PCT/GB2012/052199 (87) International publication number: WO 2013/034918 (14.03.2013 Gazette 2013/11)

(84) Designated Contracting States: AL 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 RS SE SI SK SM TR (30) Priority: 09.09.2011 GB 201115612 (71) Applicant: Pilkington Group Limited Nr. Ormskirk Lancashire L40 5UF (GB)

(72) Inventors: DENNO, Richard Christopher Somer St Helens Merseyside WA10 6DB (GB) ZYSKO, Grzegorz Manchester Greater Manchester M13 9PL (GB) PEYTON, Anthony Manchester Greater Manchester M13 9PL (GB) (74) Representative: Stanley, Andrew Thomas et al Pilkington Group Limited Intellectual Property Pilkington European Technical Centre Hall Lane, Lathom Ormskirk, Lancashire L40 5UF Ormskirk, Lancashire L40 5UF (GB)