Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Reexamination Certificate
2011-01-25
2011-01-25
Vo, Anh T. N. (Department: 2861)
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
Reexamination Certificate
active
07874656
ABSTRACT:
An ink-feeding device is provided in which the pressure applied to the ink in the printing head can be adjusted arbitrarily irrespective of the relative positions of the ink container and the printing head. Inside the sub-tank80, a pressure-adjusting pump82is installed for applying a suitable pressure to many nozzles22Kn of the printing head22K. This pressure-adjusting pump82is placed a little above the bottom face of the sub-tank80at a prescribed distance from the bottom face. Thereby the pressure-adjusting pump82is immersed in the ink held in the sub-tank80. A drive unit83for driving the pressure-adjusting pump82is placed above the sub-tank80. On the upper wall of the sub-tank80, an air-vent valve84is fixed to bring the inside pressure in the sub-tank80to an atmospheric pressure. The inside pressure in the sub-tank80is made equal to the atmospheric pressure by opening the air-vent valve84.
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Haida Kazuo
Miura Takeshi
Nakamura Daisuke
Ota Noritaka
Takahashi Yuichi
Canon Finetech Inc.
patenttm.us
Vo Anh T. N.
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