公开(公告)号：DE3070757D1

公开(公告)日：1985-07-18

申请号：DE3070757

申请日：1980-10-15

Applicant: IBM

Inventor： CORNELIUS RORGER WAYNE ,  HILL JAMES DAVID ,  QUINN PAUL ALOYSIUS

IPC: B41J2/13 ,  B41J2/07 ,  B41J2/51 ,  B41J19/14 ,  B41J19/18 ,  B41J3/04

Abstract: An interactive ink jet printer prints characters of a language from left to right or right to left in accordance with the direction in which the language is normally written. The signals for the direction in which a motor, which moves ink droplet supply device relative to a recording medium, the signals from a grating, which indicates the direction of motion of the ink droplet supply device and its position relative to a reference position, and the signals for the location of the ink droplet supply device at the reference position are changed whenever the direction of character printing is to be reversed.

公开(公告)号：IT1165436B

公开(公告)日：1987-04-22

申请号：IT2813479

申请日：1979-12-18

Applicant: IBM

Inventor： KRIEG MICHAEL LEROY ,  QUINN PAUL ALOYSIUS

IPC: B41J29/50 ,  B41J29/42 ,  G06K15/00 ,  B41J

Abstract: In a typewriter environment, a carrier mounted sensor for calculating the width of a sheet of paper on the platen and for thereafter setting-up proportional margins for that sheet of paper. In addition to supporting the sensor, the carrier supports the printhead and associated apparatus for detecting the position of the carrier relative to the platen at each escapement position of the carrier. The sensor starts its scan at the extreme left position of the carrier and senses the left edge of the paper at a transition from dark (the platen surface)-to-light (the sheet of paper). This transition point is detected and stored. The carrier continues its rightward scan and the right edge of the sheet of paper signals a transition from light-to-dark. This position is detected and stored. The carrier and sensor continue scanning to the right for a specific distance to eliminate errors that are caused by dark areas on the paper that prematurely trigger light-to-dark transitions. At the end of the scan, the recorded distances yield the width of the sheet of paper and from this recorded width margins equal to a certain proportion of the total recorded width of the sheet of paper are set.