Patent ID: 7753476

Claim:
An image recording apparatus, comprising: an ink jet head having a plurality of nozzles for discharging inks; a cap body having an inner space and adapted to cover open surfaces of said nozzles such that the inner space forms a sealed space; a sucking device which is connected to the inner space of said cap body and sucks the ink from said nozzles; a cap body driver which switches a position of said cap body between a first position where said cap body is in contact with the open surfaces of said nozzles and a second position where said cap body is separated from the open surfaces of said nozzles; and a controller which controls a timing when the cap body driver switches the position of said cap body from the first position to the second position, on the basis of an ink amount to be sucked from said nozzles; wherein said timing is determined in accordance with a setting value of a negative pressure of a suck pressure at which the ink is sucked; and wherein the setting value of the maximum negative pressure of the ink suck pressure is set to be smaller, as an aperture diameter of the nozzle is larger.