(19)

(11)

EP 2 534 423 A1

(12)

(43) Date of publication: 19.12.2012 Bulletin 2012/51 (21) Application number: 11741961.4 (22) Date of filing: 31.01.2011

(51) International Patent Classification (IPC):  F23K 3/00(2006.01) F24B 13/04(2006.01) F23K 3/14(2006.01) (86) International application number: PCT/IB2011/050405 (87) International publication number: WO 2011/098932 (18.08.2011 Gazette 2011/33)

(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: 10.02.2010 NZ 57896810 (71) Applicant: Allan's Sheetmetal and Engineering Services Limited Dunedin (NZ)	(72) Inventors: WHITFIELD, Allan David Waldronville Dunedin (NZ) BRUCE, James Alexander St Leonards Dunedin (NZ) (74) Representative: Lacey, Dean Andrew  Serjeants LLP 25 The Crescent King Street Leicester LE1 6RX King Street Leicester LE1 6RX (GB)