Incremental printing of symbolic information – Ink jet – Controller
Reexamination Certificate
2007-01-23
2009-10-13
Nguyen, Lamson D (Department: 2861)
Incremental printing of symbolic information
Ink jet
Controller
C347S011000, C347S030000
Reexamination Certificate
active
07600837
ABSTRACT:
A droplet ejection apparatus comprises: (a) a recording head including a nozzle from which a droplet of a liquid is ejected, (b) a pressure chamber which is filled with the liquid and whose volume is changeable for ejecting the droplet from the nozzle, and (c) an actuator which changes the volume of the pressure chamber by a drive pulse inputted thereto; and an operating device which outputs the drive pulse to the actuator and which is capable of performing a restoring operation for restoring a droplet ejection performance of the recording head. The restoring operation includes: a first operation for outputting, a plurality of times, an ejection drive pulse as the drive pulse by which the droplet can be ejected; and a second operation for outputting, a plurality of times, a non-ejection drive pulse as the drive pulse by which the droplet can not be ejected, the second operation being performed following the first operation.
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Brother Kogyo Kabushiki Kaisha
Nguyen Lamson D
Reed Smith LLP
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