Ink jet recording apparatus and ink suction method of the recording head

摘要

An ink jet recording apparatus in which a nozzle ink jet recording head (7, 8) provided with a nozzle plate provided with apertures for jetting an ink droplet and a capping device (11) provided with a cap unit (37, 38) for sealing the apertures of the nozzle plate when the recording apparatus is not used are mounted, in which in the cap unit (37, 38) of the capping device (11), in a sealed state, an ink suction port (18) for supplying negative pressure for exhausting ink from a nozzle aperture if necessary is arranged at the bottom and at atmospheric air open port (19) for releasing negative pressure is arranged on one side and in which a porous plate (50) provided with plural through holes (51) for adjusting the distribution of pressure in the longitudinal direction of the cap unit (37, 38) is housed between the inner bottom face and the upper open face of the cap unit (37, 38) and further, an ink suction method of a recording head are provided.