(19)

(11)

EP 2 795 228 A2

(12)

(88) Date of publication A3: 07.11.2013 (43) Date of publication: 29.10.2014 Bulletin 2014/44 (21) Application number: 12823021.6 (22) Date of filing: 20.12.2012

(51) International Patent Classification (IPC):  F28D 20/00(2006.01) (86) International application number: PCT/IB2012/057509 (87) International publication number: WO 2013/093820 (27.06.2013 Gazette 2013/26)

(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: 22.12.2011 FR 1162273 (71) Applicant: Saint-Gobain Centre de Recherches et d'Etudes Européen 92400 Courbevoie (FR)	(72) Inventors: WATREMETZ, Benoît F-84360 Merindol (FR) BOUSSANT ROUX, Yves F-84140 Montfavet (FR) VINCENT, Adrien F-13750 Plan d'Orgon (FR) (74) Representative: Nony  3, rue de Penthièvre 75008 Paris 75008 Paris (FR)