Recording apparatus and liquid discharge method

Incremental printing of symbolic information – Ink jet – Controller

Reexamination Certificate

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C347S014000

Reexamination Certificate

active

06988782

ABSTRACT:
The invention intends to maintain a constant ink discharge amount among the recording heads, even in case a total pulse width of pulse voltages applied to heat generating resistors. For this purpose, a rank table is prepared in such a manner, even in a situation where a total pulse width of the pulses applied to the heat generating resistor is 3 μs or less whereby the ink discharge amount decreases with a decrease in the total pulse width, that a maximum reached temperature on the surface of the heat generating resistors at the application of a preheat pulse becomes higher with a decrease in the resistance of a rank resistor, and a pulse width P1on the rank table is made longer thereby compensating a decrease in the ink discharge amount with a decrease in the total pulse width and maintaining a constant ink discharge amount.

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patent: 7-52387 (1995-02-01), None
patent: 8-39808 (1996-02-01), None
*Note: U.S. counterpart Patent No. 6,331,039 also enclosed.
10/282,178.
10/290,531.

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