Incremental printing of symbolic information – Ink jet – Controller
Reexamination Certificate
2005-02-08
2005-02-08
Meier, Stephen D. (Department: 2853)
Incremental printing of symbolic information
Ink jet
Controller
C347S009000, C347S010000
Reexamination Certificate
active
06851780
ABSTRACT:
In order that the volume of a liquid drop can increase and the drop can reach with high precision even if the distance between a head nozzle and a plotted base is short, there is provided a driving method for a liquid discharge head including: a discharge port for discharging liquid; a pressure-applying portion communicating with the discharge port, for applying a pressure for discharge to the liquid; and a pressure generating device for generating the pressure, the method including a step of applying a first discharge pulse for discharging liquid and a second discharge pulse for discharging liquid to the pressure generating device in a sequential manner in response to an instruction of one-dot discharge, in which the pulse width of the first discharge pulse, the pulse width of the second discharge pulse, and a rest time between the first discharge pulse and the second discharge pulse are determined so that a first liquid discharged in response to the first discharge pulse has a volume equal to or greater than that of a second liquid discharged in response to the second discharge pulse and the discharge speed of the first liquid is lower than the discharge speed of the second liquid.
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Fujimura Hidehiko
Horie Ryoko
Canon Kabushiki Kaisha
Dudding Alfred
Fitzpatrick ,Cella, Harper & Scinto
Meier Stephen D.
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