Incremental printing of symbolic information – Ink jet – Ejector mechanism
Patent
1997-03-24
1999-08-17
Le, N.
Incremental printing of symbolic information
Ink jet
Ejector mechanism
347 5, 347 50, 340500, 340525, G08B 2500, B41J 214
Patent
active
059400978
ABSTRACT:
To allow a head unit to be detached from a carriage while preventing a driver IC substrate provided on the head unit from being damaged by a latchup current, electrical charges stored in a smoothing capacitor are discharged in a resistor and dissipated therein when, a power source cutoff signal changes from a high level to a low level. When the smoothing capacitor is discharged, an LED is turned off to indicate the completion of the discharge. Upon confirming that the LED has turned off, the head unit is detached from the carriage. In another solution, the head unit is locked to the carriage by a lock mechanism. A high voltage contact in a dimple FPC is disconnected from the driver IC substrate when a lever of the lock mechanism is rotated in counter-clockwise direction to unlock the head unit. In this condition, the head unit can be detached from the carriage without damaging the driver IC substrate.
REFERENCES:
patent: 4423410 (1983-12-01), Galvin et al.
patent: 5461405 (1995-10-01), Lehmann et al.
patent: 5530465 (1996-06-01), Hasegawa
patent: 5550570 (1996-08-01), Kurata et al.
Brother Kogyo Kabushiki Kaisha
Le N.
Nguyen Lamson D.
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