(19)

(11)

EP 0 975 416 A1

(12)

(43) Date of publication: 02.02.2000 Bulletin 2000/05 (21) Application number: 98935371.9 (22) Date of filing: 21.07.1998

(51) International Patent Classification (IPC)7: B01D 53/32, H01J 27/00 (86) International application number: PCT/KR9800/220 (87) International publication number: WO 9939/808 (12.08.1999 Gazette 1999/32)

(84) Designated Contracting States: DE DK FI FR GB IT NL SE (30) Priority: 07.02.1998 KR 9803558 (71) Applicant: Park, Sung Don Koyang-si, Kyungki-do 422-351 (KR)	(72) Inventor: Park, Sung Don Koyang-si, Kyungki-do 422-351 (KR) (74) Representative: König, Werner, Dipl.-Ing.,Patentanwälte,König & Kollegen  Habsburgerallee 23-25 52064 Aachen 52064 Aachen (DE)