JP2010017875A5 - - Google Patents

Claims (11)

A recording head that ejects ink droplets from the nozzle array; a cap member that contacts the nozzle array; an ink tank that supplies ink to the ink liquid chamber of the recording head; and ink that is supplied from the ink tank to the ink liquid chamber. A suction recovery method for recovering suction of the recording head by a negative pressure generating step of generating a negative pressure in the recording head via the cap member, in the nozzle row of the ink jet recording apparatus having an ink flow path for feeding Because
The negative pressure generating step opens and closes a flexible valve provided between the ink liquid chamber and the ink flow path, and a control valve for controlling the flow of gas and liquid in the negative pressure generating step. A suction recovery method characterized by operating.   The suction recovery method according to claim 1, wherein the negative pressure generating step combines opening / closing operations of the flexible valve and the control valve a plurality of times.   The negative pressure generating step includes a first step of closing the flexible valve and opening the control valve, and a closing state of the control valve while keeping the flexible valve closed. 2. A second step of performing, and a third step of bringing the control valve from the closed state to the open state after the flexible valve is opened from the closed state. Item 3. The suction recovery method according to Item 2.   The suction recovery method according to claim 3, wherein the first step, the second step, and the third step are repeated a plurality of times.   Before the negative pressure generating step, the control valve is opened and closed a plurality of times with the flexible valve maintained in an open state to generate a negative pressure on the recording head. The suction recovery method according to any one of claims 1 to 4.   The negative pressure is generated in the recording head by performing the opening and closing operation of the control valve a plurality of times after the negative pressure generating step while the flexible valve is kept open. The suction recovery method according to any one of claims 1 to 4.   2. The negative pressure is generated in the recording head by maintaining the flexible valve in an open state and maintaining the control valve in an open state before the negative pressure generating step. The suction recovery method according to claim 6.   2. The negative pressure is generated in the recording head by maintaining the flexible valve in the open state and maintaining the control valve in the open state after the negative pressure generating step. Item 7. The suction recovery method according to any one of Items 6.   9. The ink jet recording apparatus according to claim 1, wherein the ink jet recording apparatus includes a plurality of cap members that contact the nozzle rows, and the negative pressure generating step is performed for each cap member. The suction recovery method described. A recording head that ejects ink droplets from the nozzle array; a cap member that contacts the nozzle array; an ink tank that supplies ink to the ink liquid chamber of the recording head; and ink that is supplied from the ink tank to the ink liquid chamber. An ink jet recording apparatus comprising: an ink flow path for feeding; and suction recovery means for performing suction recovery of the recording head by a negative pressure generating means for generating a negative pressure on the recording head via the cap member. ,
The suction recovery means is configured to supply ink to the ink liquid chamber by pressurizing the ink liquid in the ink tank and a flexible valve provided between the ink liquid chamber and the ink flow path. An ink supply means and a control valve for controlling the flow of gas and liquid in the negative pressure generating means, and controlled by opening and closing the flexible valve and the control valve. An ink jet recording apparatus.   The inkjet recording apparatus according to claim 10, wherein the suction recovery unit combines opening / closing operations of the flexible valve and the control valve a plurality of times.