Abstract: Installed are intermediate tank 12 with damping function against pressure fluctuation for temporarily storing ink in a position within ink supplying pipe 9a which supplies ink from main tank 11 to recording head 7, liquid supplying pump 23 between main tank 11 and intermediate tank 12 for supplying ink to intermediate tank 12 and controller 25 actuating liquid supplying pump 23 to supply ink from main tank 11 to intermediate tank 12 when membrane surface detecting sensor 19 detects that the quantity of remaining ink in intermediate tank 12 is less than a prescribed one. When liquid supplying pump is actuated and no increase of quantity of remaining ink in intermediate tank 12 is detected, controller 25 judges that that there is no remaining ink in main tank 11 and a result of the judgment is notified by display section 28.

Abstract: To prevent ink adhesion to a conduit connecting portion after removing an ink tank, there is provided an ink jet recording apparatus including a recording head for jetting ink onto a recording medium; an ink tank for storing ink; an ink tank housing section for attachably and detachably housing the ink tank; a conduit section for supplying ink from the ink tank to a recording head, the conduit section including a conduit connecting portion for connecting with a joint section to the ink tank; and an ink removing device having a removing member for removing ink adhering to a tip end of the conduit connecting portion when the ink tank has been parted from the conduit connecting portion.

Abstract: An ink jet printer includes a recording head having nozzles for jetting ink onto a recording medium, an intermediate tank for temporarily storing ink in a lower position of the recording head, and an ink supply line for feeding the ink between the intermediate tank and the recording head, wherein when a viscosity of the ink is ? and pressure loss which allows the ink to be stably jetted is h, a length L and a diameter d of the ink supply line satisfy an inequality: (2.823×109×d4)/L>?/h.

Abstract: An inkjet printer includes an ink-supply tube, a damper for temporarily storing ink at a midway of the ink-supply tube, an ink-feed pump, an ink detection section for detecting whether an ink amount in the damper is not smaller than a predetermined amount, and a control section for controlling the ink-feed pump, according to a detection result. The damper includes an ink chamber for storing ink, a damper membrane that expands and shrinks, corresponding to an ink amount in the ink chamber, and a regulating member for regulating an expansion amount of the damper membrane, the member disposed outside the damper membrane. The ink detection section includes a moving section that moves according to a displacement of the damper membrane and a detection sensor for detecting whether the ink amount in the damper is not smaller than the predetermined amount, based on a travel distance of the moving section.

Abstract: Installed are intermediate tank 12 with damping function against pressure fluctuation for temporarily storing ink in a position within ink supplying pipe 9a which supplies ink from main tank 11 to recording head 7, liquid supplying pump 23 between main tank 11 and intermediate tank 12 for supplying ink to intermediate tank 12 and controller 25 actuating liquid supplying pump 23 to supply ink from main tank 11 to intermediate tank 12 when membrane surface detecting sensor 19 detects that the quantity of remaining ink in intermediate tank 12 is less than a prescribed one. When liquid supplying pump is actuated and no increase of quantity of remaining ink in intermediate tank 12 is detected, controller 25 judges that that there is no remaining ink in main tank 11 and a result of the judgment is notified by display section 28.

Abstract: To prevent ink adhesion to a conduit connecting portion after removing an ink tank, there is provided an ink jet recording apparatus including a recording head for jetting ink onto a recording medium; an ink tank for storing ink; an ink tank housing section for attachably and detachably housing the ink tank; a conduit section for supplying ink from the ink tank to a recording head, the conduit section including a conduit connecting portion for connecting with a joint section to the ink tank; and an ink removing device having a removing member for removing ink adhering to a tip end of the conduit connecting portion when the ink tank has been parted from the conduit connecting portion.

Abstract: An ink jet printer includes a recording head having nozzles for jetting ink onto a recording medium, an intermediate tank for temporarily storing ink in a lower position of the recording head, and an ink supply line for feeding the ink between the intermediate tank and the recording head, wherein when a viscosity of the ink is &mgr; and pressure loss which allows the ink to be stably jetted is h, a length L and a diameter d of the ink supply line satisfy an inequality: (2.823×109×d4)/L>&mgr;/h.

Abstract: An inkjet printer provided with plural recording heads for respectively jetting a white ink and plural process color inks onto a recording medium, a white ink tank for storing white ink, and plural process color ink tanks for respectively storing plural process color inks. The inkjet printer is characterized in that the capacity of the white ink tank is larger than the capacity of each of the plurality of process color ink tanks.

Abstract: An inkjet printer provided with plural recording heads for respectively jetting a white ink and plural process color inks onto a recording medium, a white ink tank for storing white ink, and plural process color ink tanks for respectively storing plural process color inks. The inkjet printer is characterized in that the capacity of the white ink tank is larger than the capacity of each of the plurality of process color ink tanks.

Abstract: There are described a method and mechanism for recovering an ink-jetting head and a cap utilized for sucking nozzles. The mechanism includes a cap to cover at least a nozzle hole of the ink-jetting head, a cap movement mechanism to move the cap relative to a nozzle plate on which the nozzle hole is equipped, a depressurizing device and a controller to control the cap movement mechanism, so that the cap moves to a first position at which the cap air-tightly seals a region of the nozzle plate, and moves to a second position at which the cap contacts the nozzle plate to generate a gap between a lip portion of the cap and the nozzle plate, wherein the depressurizing device operates to depressurize a space covered by the cap, when the cap is positioned at the first position, and the depressurizing device operates, when the cap is positioned at the second position.