(19)

(11)

EP 0 421 992 A1

(12)

(43) Date of publication: 17.04.1991 Bulletin 1991/16 (21) Application number: 88907533.0 (22) Date of filing: 27.06.1988

(51) International Patent Classification (IPC):  B65B 3/ 04( . ) B65B 39/ 00( . ) (86) International application number: PCT/US1988/002183 (87) International publication number: WO 1990/000136 (11.01.1990 Gazette 1990/02)

(84) Designated Contracting States: DE FR GB IT (71) Applicant: BURTON, John W. Pittsburgh, PA 15228 (US)	(72) Inventor: BURTON, John W. Pittsburgh, PA 15228 (US) (74) Representative: SERJEANTS  25, The Crescent King Street Leicester, LE1 6RX Leicester, LE1 6RX (GB)