(19)

(11)

EP 0 964 623 A1

(12)

(43) Date of publication: 22.12.1999 Bulletin 1999/51 (21) Application number: 98907030.0 (22) Date of filing: 23.02.1998

(51) International Patent Classification (IPC):  A41B 11/ 00( . ) D06C 5/ 00( . ) (86) International application number: PCT/GB1998/000567 (87) International publication number: WO 1998/039982 (17.09.1998 Gazette 1998/37)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GR IE IT LI LU NL PT SE (30) Priority: 07.03.1997 GB 19970004792 22.04.1997 US 19970044123P (71) Applicant: PORVAIR PLC King's Lynn, Norfolk PE30 2HS (GB)	(72) Inventors: STIRLING, Ian Norfolk PE34 4JX (GB) HAYTON, Karen, Charlotte Northampton NN3 9DX (GB) (74) Representative: Kearney, Kevin David Nicholas, et al  KILBURN & STRODE 20 Red Lion Street London, WC1R 4PJ London, WC1R 4PJ (GB)