EP 0765233 A1 19970402 - METHOD AND APPARATUS FOR ACCURATE CONTROL OF TEMPERATURE PULSES IN PRINTING HEADS
Title (en)
METHOD AND APPARATUS FOR ACCURATE CONTROL OF TEMPERATURE PULSES IN PRINTING HEADS
Title (de)
VERFAHREN UND APPARAT FÜR DIE GENAUE REGELUNG DER TEMPERATURPULSE IN DRUCKKÖPFEN
Title (fr)
PROCEDE ET DISPOSITIF DE COMMANDE PRECISE DE TEMPERATURE DANS DES TETES D'IMPRESSION
Publication
Application
Priority
- AU PN231795 A 19950412
- US 9605020 W 19960409
Abstract (en)
[origin: WO9632273A1] A method and apparatus for producing a thermal pulse for a drop on demand printer actuator. A varying voltage pulse is applied to a resistance heater forming part of the actuator, which generates time varying power in the resistance heater. The power varies with respect to time in a manner comprising: a pre-heating stage, which raises the temperature of the actuator, but is of insufficient total energy to actuate the printing actuator; a stage of increased power which rapidly raises the temperature of the actuator to the required temperature for operation; a stage of decreased power, which is less than the power in stage (b) but is sufficient to maintain the required temperature for operation; a stage of low or zero power, during which the temperature rapidly falls below the required temperature for operation. Accurate control over the temperature history at critical points in a device (such as the nozzle tip in a thermal, drop on demand print head) can be achieved by determining the required power function by applying an initial power function to a dynamic finite element simulation of the required structure, and iteratively refining the power function.
IPC 1-7
IPC 8 full level
B41J 2/175 (2006.01); B41J 2/04 (2006.01); B41J 2/05 (2006.01); B41J 2/14 (2006.01)
CPC (source: EP)
B41J 2/04536 (2013.01); B41J 2/04553 (2013.01); B41J 2/04583 (2013.01); B41J 2/04588 (2013.01); B41J 2/0459 (2013.01); B41J 2/04591 (2013.01); B41J 2/14451 (2013.01)
Citation (search report)
See references of WO 9632273A1
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
WO 9632273 A1 19961017; AU PN231795 A0 19950504; EP 0765233 A1 19970402; JP H10501771 A 19980217
DOCDB simple family (application)
US 9605020 W 19960409; AU PN231795 A 19950412; EP 96912693 A 19960409; JP 53118696 A 19960409