Abstract: When a second cylindrical unit 38 of a second connection unit 11 is pushed into a first cylindrical unit 16 of a first connection unit 15, a sliding member 23 moves along an axis member. With the timing, the position of a moving aperture 22 formed on the sliding member 23 moves from the first position not opposite a first aperture 19 and a second aperture 51 to the second position opposite the first aperture 19 and the second aperture 51.

Abstract: This invention provides an adjusting method for use in a recording apparatus having a configuration where head units, in each of which a plurality of recording heads are arranged in a direction (main scanning direction) orthogonal to a moving direction (sub-scanning direction) of a recording medium relative to the recording heads so that ends of recordable regions of the recording heads partially overlap or contact when viewed in a conveyance direction of the recording medium, are arranged by a number equal to the number of recording colors in parallel in the sub-scanning direction, comprising adjusting quality of an image recorded on the recording medium by changing a positional relationship of a predetermined recording pattern, which is recorded on the recording medium with each of the recording heads, within each of the head units and/or among the plurality of head units.

Abstract: An image forming apparatus performs an image forming operation by driving a ejecting element of a recording head with an ink ejecting drive voltage for ejecting ink, detects a temperature of ink to be flown into the recording head and a temperature of ink to be discharged respectively with a first temperature detection section and a second temperature detection section, and corrects the ink ejecting drive voltage on the basis of a temperature of ink being heat-transferred with the ejecting element, which is estimated with a predetermined conversion formula on the basis of the detected ink temperatures, for controlling an ink amount to be ejected.

Abstract: An ink jet printer has an ink circulation unit including an image recording unit to discharge ink to perform image recording on a recording medium; a first tank disposed above the image recording unit in a gravitational force direction to supply the ink to the image recording unit through a first ink path; a second tank disposed below the image recording unit in the gravitational force direction to collect the ink that was not discharged from the image recording unit through the second ink path; a pump to send the ink from the second tank to the first tank through a third ink path, and at least a part of the first ink path connecting the first tank and the image recording unit is positioned below an ink liquid level in the second tank in the gravitational force direction.

Abstract: A long-life pump capable of simultaneously conveying plural liquids and an inkjet printer having the pump are provided. The liquid pump includes: a liquid storage unit having liquid chambers trapping at least two types of liquids with each chamber corresponding to the type of the trapped liquid; a coupling member for connection to each liquid chamber of the liquid storage unit; a pressure adjusting mechanism, connected to the coupling member, for alternately switching between a negative pressure and a positive pressure of an internal pressure of the liquid chamber; an inlet valve capable of passing the liquid to the liquid chamber; an outlet valve discharging the liquid in the liquid chamber; and a pass resistance variable mechanism adjusting an amount of the liquid trapped in the liquid chamber depending on a level of the liquid in the liquid chamber.

Abstract: An ink-jet recording apparatus is provided with an ink tank, a recording head, an ink passage extending from the ink tank to the recording head, and a sub-tank arranged on the ink passage. The apparatus has a first ink passage, a second ink passage, and an ultrasonic transducer. The first ink passage supplies ink from the ink tank to the sub-tank. The second ink passage has an ink outlet port, through which the ink is drawn from the sub-tank into the recording head. The ultrasonic transducer applies ultrasonic vibration to the ink contained in the sub-tank. The ink outlet port of the second ink passage is arranged near the ultrasonic transducer.

Abstract: An apparatus includes: a recording unit for holding an ink head capable of jetting liquid ink to a recording medium; a feeding mechanism arranged opposite the recording unit and feeding the recording medium having at least a feed belt, a driving roller and a driven roller for providing the feed belt, a support frame for holding the driving roller and the driven roller; and a feed roller feeding the recording medium by correcting feeding posture of the recording medium to the feeding mechanism. The support axis of the feed roller is held by a support frame of the feeding mechanism.