公开(公告)号：CA1204337A

公开(公告)日：1986-05-13

申请号：CA465438

申请日：1984-10-15

Applicant: IBM

Inventor： LEE FRANCIS C ,  MILLS ROSS N ,  PAYNE ROBERT N ,  TALKE FRANK E

IPC: B41J2/045 ,  B41J2/055 ,  B41J2/205 ,  B41J2/21 ,  B41J3/04

Abstract: SPOT SIZE MODULATION USING MULTIPLE PULSE RESONANCE DROP EJECTION An ink jet drop-on-demand printing system comprising an ink jet print head having an ink cavity supplied with a suitable ink. An electromechanical transducer is mounted in mechanical communication with the ink cavity, and a source of electrical signals is provided to selectively actuate the transducer to produce an ink drop of a selected size. To produce ink drops of a selected size the source of electrical signals produces one or more electrical drive signals each separated by a fixed time delay which is short with respect to the dropon-demand drop production rate. Each electrical drive signal ejects a predetermined volume of ink and all the volumes of ink merge to form a single drop prior to the time the ink drops reach the print medium for printing.