Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Reexamination Certificate
2008-04-23
2011-11-08
Peng, Charlie (Department: 2883)
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
C073S29000R
Reexamination Certificate
active
08052266
ABSTRACT:
A liquid detection device that drives a liquid detecting portion includes a driving portion, a signal detecting portion, a high-pass filter portion, a first switch, and a control portion. The driving portion supplies a driving signal or a preliminary charging voltage to the liquid detecting portion. The signal detecting portion receives a detection signal from the liquid detecting portion. The high-pass filter portion has a capacitor portion and is arranged between the liquid detecting portion and the signal detecting portion. The first switch is arranged between the liquid detecting portion and the high-pass filter portion, and electrically connects or interrupts a line between the liquid detecting portion and the high-pass filter portion. The control portion controls the driving portion and the first switch to execute detection of liquid.
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Peng Charlie
Radkowski Peter
Seiko Epson Corporation
Sughrue & Mion, PLLC
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