EP 0628412 A2 19941214 - Nozzle drive control system and method for ink jet printing.
Title (en)
Nozzle drive control system and method for ink jet printing.
Title (de)
Düsenantriebssteuerung und Tintenstrahldruckverfahren.
Title (fr)
Système de commande de buses et procédé d'impression par jet d'encre.
Publication
Application
Priority
- EP 90303101 A 19900322
- US 33200989 A 19890331
Abstract (en)
A method of, and a control circuit for, determining the exciting voltage to be applied to the nozzle of an ink jet printer to break a stream of ink into droplets for printing includes the steps of slowly increasing the exciting voltage from a minimum value and detecting and recording the value C(H) at which droplet formation first occurs closest to the nozzle. The exciting voltage for printing is estimated by applying electrical test patterns (Figure 6) to the ink droplets such that the patterns will vary in phase relative to droplet timing whereby only some of the test patterns will successfully charge the droplets. After that, those droplets which have been successfully charged are detected and the value C(H) determined from the change in the sequence of detected charge patterns. The exciting voltage for printing is estimated according to the formula V(est) = C(H) - E, where E is a voltage related to the performance on the ink. <IMAGE>
IPC 1-7
IPC 8 full level
B41J 2/02 (2006.01); B41J 2/115 (2006.01); B41J 2/12 (2006.01); B41J 2/125 (2006.01); G01D 15/18 (2006.01)
CPC (source: EP)
Designated contracting state (EPC)
CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0390427 A1 19901003; EP 0390427 B1 19950322; AU 4530289 A 19901004; AU 620941 B2 19920227; CA 2001041 A1 19900930; CA 2001041 C 19940308; DE 69017931 D1 19950427; DE 69017931 T2 19950720; DE 69031431 D1 19971016; DE 69031431 T2 19980122; EP 0628412 A2 19941214; EP 0628412 A3 19950607; EP 0628412 B1 19970910; ES 2069681 T3 19950516; ES 2106440 T3 19971101; JP 2858833 B2 19990217; JP H02274556 A 19901108
DOCDB simple family (application)
EP 90303101 A 19900322; AU 4530289 A 19891117; CA 2001041 A 19891019; DE 69017931 T 19900322; DE 69031431 T 19900322; EP 94202383 A 19900322; ES 90303101 T 19900322; ES 94202383 T 19900322; JP 33252389 A 19891221