Patent ID: 9139007
Filing Date: 2015-09-22
Classification: B41J

Abstract:
1. A head cleaning method in a liquid discharging apparatus which includes a head that is provided with nozzles which discharge liquid to a recording medium, a storage section that stores the liquid, a circulation flow path that includes a first flow path which supplies the liquid from the storage section to the head and a second flow path which refluxes the liquid from the head to the storage section, a pump that circulates the liquid in the circulation flow path, and a wiping section that performs a wiping process to wipe off contaminants which adhere to a nozzle opening surface by relatively moving with regard to the head while being abutted on the nozzle opening surface of the head, the head cleaning method comprising: a first step of setting a flow rate per unit time of the liquid which flows through the circulation flow path to a first flow rate by increasing a number of rotations of the pump, wherein the first flow rate is greater than a flow rate in a case in which the liquid is discharged to the recording medium; a second step of the wiping section performing the wiping process after the first step, wherein the wiping process is performed while the liquid flows through the circulation path at the first flow rate due to the continuing increased number of rotations of the pump to thereby provide pressure to the head; and a third step of setting the flow rate per unit time of the liquid which flows through the circulation flow path to a second flow rate which is lower than the first flow rate after the second step by lowering the rotations of the pump.