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AssigneeCanon Kabushiki Kaisha
InventorsAkihiro Yamanaka, Mitsuru Kurata, Yutaka Koizumi, Hiroyuki Maeda, Takeaki Shima, Akira Goto, Takeshi Kono, Tetsuto Kageyama, Itaru Watanabe, Hiroki Tajima, Yasushi Iijima, Toshihiro Sasaki
Estimating the term…
The invention prevents drawbacks resulting from the bubble generated at the downstream side of the filter, while minimizing the waste in the ink. The recording head has a sub tank for storing ink supplied from the exterior, and a liquid chamber storing the ink supplied from the sub tank and supplying ink directly to a nozzle for ink discharge. A filter is provided between the sub tank and the liquid chamber. The liquid chamber holds ink of a predetermined amount in such a manner that the ink therein is separated by gas between the filter and the liquid chamber.
A liquid supply system which is provided with a liquid supply path to a liquid holding portion holding liquid at the downstream end in the supply direction of liquid and a filter in the liquid supply path and in which the liquid can be supplied from the upstream side of the filter to the downstream side thereof in the vertical direction in the direction of gravity, the system comprising:
An ink jet recording head provided with a first liquid chamber and a second liquid chamber separated by a filter and respectively containing liquid therein, and a liquid discharge portion connected directly with said second liquid chamber and adapted to discharge the liquid supplied from said second liquid chamber, in which the liquid can be supplied from said first liquid chamber to said second liquid chamber through said filter, comprising:
A liquid filling method for use in a liquid supply system in which first and second liquid chambers respectively holding liquid are separated by a filter while liquid is held at the downstream side of said second liquid chamber in the liquid supply direction from said first liquid chamber to said second liquid chamber, a member is provided for separating a contact portion of the downstream side of said filter into a gas holding area and a liquid holding area in a state capable of liquid supply from the upstream side of said filter to the downstream side thereof in the vertical direction of gravity, and the gas held in said gas holding area is in communication with the gas present between the downstream side of said filter and the upstream side of the second liquid chamber, the method comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Refilling of the cartridge: whilst mounted in the printer
Typewriters
Term ended 21 Jun 2022 (estimated)
1. Field of the Invention
The present invention relates to an ink jet recording head, an ink jet recording apparatus employing such inkjet recording head, and a liquid supply system suitable for use therein.
2. Related Background Art
FIG. 1 is a perspective view showing the schematic configuration of an ink jet recording apparatus constituting a first embodiment of the present invention;
FIG. 2 is a view showing an ink supply path for a color, in the ink jet recording apparatus shown in FIG. 1;
FIGS. 3A, 3B, 3C and 3D are views showing the behavior of gas and ink in the liquid path of an ink supply unit, in case of gas introduction into a main tank in the ink supply path shown in FIG. 2;
Now the present invention will be clarified in detail by embodiments thereof, with reference to the accompanying drawings.
[First Embodiment]
FIG. 1 is a perspective view showing schematic configuration of an ink jet recording apparatus constituting a first embodiment of the present invention.