(19)

(11)

EP 0 226 579 A1

(12)

(43) Date of publication: 01.07.1987 Bulletin 1987/27 (21) Application number: 85903515.0 (22) Date of filing: 20.06.1985

(51) International Patent Classification (IPC):  B41J 1/ 20( . ) B41J 2/ 28( . ) B41J 2/ 22( . ) B41J 9/ 24( . ) (86) International application number: PCT/US1985/001164 (87) International publication number: WO 1986/007569 (31.12.1986 Gazette 1986/28)

(84) Designated Contracting States: BE CH DE FR GB IT LI NL SE (71) Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION Charlotte, NC 28257 (US)

(72) Inventors: McELROY, Robert, Marion, Jr. Charlotte, NC 28226 (US) McGUIRE, Thomas, Alfred, Jr. Landis, NC 28088 (US) COLE, Norman, Frederick Charlotte, NC 28212 (US) THORNE, William, Duncan Raleigh, NC 27609 (US) PATTERSON, William, Alexander Charlotte, NC 28211 (US) (74) Representative: Atchley, Martin John Waldegrave  IBM United Kingdom Limited Intellectual Property Department Hursley Park Winchester Hampshire SO21 2JN Winchester Hampshire SO21 2JN (GB)