公开(公告)号：DE69229079T2

公开(公告)日：1999-12-16

申请号：DE69229079

申请日：1992-02-26

Applicant: IBM

Inventor： BECK JAMES LEE ,  BOOTH JAMES RONALD ,  BUCHANAN JAMES CLOYD ,  CLAFFEY-COHEN MARGARET ELIZABE ,  COLE CARL PRICE ,  LOUIE TIMOTHY JUNG-MING ,  NEEL II ALAN FOBES ,  OLIVER LYNN MARVIN ,  WARD JAMES PETER ,  WEBB JAMES FRANCIS

IPC: G06F3/12 ,  G06F13/42 ,  B41J29/38

Abstract: A parallel interface connects a data processor and a printer so that each may transmit information to the other or receive information from the other. The transmitted information from the data processor can be data or status signals. The data or status signals are transmitted over the same eight information lines between the data processor and the printer with a predetermined signal being sent over another line from the data processor to the printer prior to transmission over the eight lines to identify whether the transmitted information is data or status signals. The printer sends status signals to the data processor over the same eight information lines after sending a predetermined signal to the data processor over a further line that it is going to transmit.

公开(公告)号：DE3584109D1

公开(公告)日：1991-10-24

申请号：DE3584109

申请日：1985-04-02

Applicant: IBM

Inventor： ALDRICH CHARLES STANLEY ,  BOOTH JAMES RONALD ,  SCHULLER WILLIAM MARTIN ,  YOUNG LLOYD PHILLIP

IPC: B41J35/12 ,  B41J35/20 ,  B41J33/14

Abstract: A method of and apparatus for proportional ribbon (23) tracking on a printer including a printwheel (25), ribbon (23) and hammer all mounted on a carrierfortranslation opposite a platen (21). Ribbon lift mechanism (17,47) is provided for effecting elevation of ribbon (23) to multiple predetermined positions or tracks so that characters may be printed on print receiving medium (22). Input means (11) receives a character to be printed. The microprocessor (13), in conjunction with the ROM (15), characterizes the character in accordance with a predetermined plurality of characteristics. In accordance with ribbon lift and fed algorithms, a particular characteristic of the character to be printed is added to a position on the ribbon upon which at least one prior character has been printed. In this manner a new print position is determined. Thereafter, the new track print position is outputted to the ribbon lift and feed means (17,47,18) for effecting elevation of said ribbon (23) to one of a multiple of predetermined positions to thereby approximately maximize the number of predetermined positions of said ribbon with characters thereon which may be printed without character overlap.