(19)

(11)

EP 0 342 204 A1

(12)

(43) Date of publication: 23.11.1989 Bulletin 1989/47 (21) Application number: 88902602.0 (22) Date of filing: 09.03.1988

(51) International Patent Classification (IPC):  D21C 9/ 147( . ) D21C 9/ 10( . ) B01J 19/ 00( . ) (86) International application number: PCT/SE1988/000117 (87) International publication number: WO 1988/007102 (22.09.1988 Gazette 1988/21)

(84) Designated Contracting States: AT DE FR SE (30) Priority: 13.03.1987 SE 19870001042 (71) Applicant: AGA AKTIEBOLAG S-181 81 Lidingö (SE)	(72) Inventors: SVENSSON, Sven-Göran S-184 00 Akersberga (SE) BOKSTRÖM, Monica S-163 72 Spanga (SE) (74) Representative: Wiedemann, Bernd, et al  AGA AKTIEBOLAG Patent Department S-181 81 Lidingö S-181 81 Lidingö (SE)