Apparatus for determining discharging state of liquid...

Details Apparatus for determining discharging state of liquid... Apparatus for determining discharging state of liquid...

2006-09-19

2006-09-19

Patel, Vip (Department: 2861)

Incremental printing of symbolic information

Ink jet

Controller

Reexamination Certificate

active

07108347

ABSTRACT:
In a discharging state determination method and apparatus for detecting discharging state from each nozzle of a printhead which discharges droplets, each of the nozzles of the printhead is driven, and the discharging state from each driven nozzle is detected and stored as a physical amount in a memory. A threshold for determining whether the discharging state of each nozzle of the printhead is normal or abnormal is calculated by using the physical amount corresponding to each nozzle and stored in the memory. The physical amount corresponding to each nozzle is evaluated on the basis of the threshold, and it is determined whether the droplet discharging state of each nozzle is normal or abnormal.

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