(19)

(11)

EP 0 168 457 A1

(12)

(43) Date of publication: 22.01.1986 Bulletin 1986/04 (21) Application number: 85900692.0 (22) Date of filing: 10.01.1985

(51) International Patent Classification (IPC):  B23D 37/ 16( . ) (86) International application number: PCT/GB1985/000012 (87) International publication number: WO 1985/003020 (18.07.1985 Gazette 1985/16)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 12.01.1984 GB 19840000708 (71) Applicant: FLEMING THERMODYNAMICS LIMITED Glasgow G81 2DR (GB)	(72) Inventors: RIACH, Alan, Bryson Bathgate West Lothian (GB) WRIGHT, Daniel, Whitelaw Clarkston Glasgow G76 7BX (GB)