Incremental printing of symbolic information – Ink jet – Ejector mechanism
Patent
1998-03-09
2000-07-11
Le, N.
Incremental printing of symbolic information
Ink jet
Ejector mechanism
B41J 2165
Patent
active
060861835
ABSTRACT:
A suction pump 42 includes a casing 52 and a pair of piston members 53, 54. The casing 52 has a suction port 52a connected to a suction cap 41 via a channel 55 and a discharge port 52b for discharging ink sucked in through the suction port 52a. The pair of piston members 53, 54 are independently movable within the casing 52 and define between themselves a pump chamber 52e having a volume changeable with relative position of the piston members 53, 54. First, the piston members 53, 54 are driven to increase the volume of the pump chamber 52e so that ink from a recording head in sealing connection with the suction cap fills the suction cap and the channel. Then while maintaining the ink in the suction cap 41 and the channel 55, the piston member 53, 54 are driven to reduce the size of the pump chamber 52e to a minimum to discharge the ink from the pump chamber 52e. Then the piston members 53, 54 are driven to increase the volume of the pump chamber 52e from the minimum volume at a predetermined stroke in order to suck a predetermined amount of ink from the recording head.
REFERENCES:
patent: 5543826 (1996-08-01), Kuronuma et al.
patent: 5606353 (1997-02-01), Mochizuki et al.
patent: 5639220 (1997-06-01), Hayakawa
patent: 5926193 (1999-07-01), Umeda
patent: 5934889 (1999-08-01), Muraki
Brother Kogyo Kabushiki Kaisha
Hsieh Shih-Wen
Le N.
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