Incremental printing of symbolic information – Ink jet – Controller
Reexamination Certificate
2011-05-10
2011-05-10
Nguyen, Lam S (Department: 2853)
Incremental printing of symbolic information
Ink jet
Controller
C347S011000, C347S014000
Reexamination Certificate
active
07938501
ABSTRACT:
A voltage pulse that keeps the ejection volume within a specified range is selected for a plurality of print element columns, based on the heater rank and ink temperature information that influences the ejection volume during ink ejection. At this time, the voltage pulse is controlled so that the voltage value of the pulse is equal for a plurality of print element columns at any ink temperature and varies according to the ink temperature. This control process enables pulses of the same voltage value to be applied at all times to a plurality of nozzle columns even if these nozzle columns in the print head have different heater ranks. As a result, the ejection volumes of all nozzle columns can be kept within a specified range with high precision over a wide range of base temperature, without requiring complicated circuit configurations.
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Nishikori Hitoshi
Takamiya Hideaki
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Nguyen Lam S
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