Patent ID: 7401889
Filing Date: 2008-07-22
Classification: B41J

Abstract:
1. A liquid ejector comprising: a liquid ejection head including a nozzle for ejecting a liquid; a cap device for sealing the liquid ejection head; a gear pump, connected to the cap device, for generating negative pressure and discharging fluid out of the liquid ejection head with the negative pressure in a state in which the cap device seals the liquid ejection head, wherein the liquid ejector: suctions fluid from the cap device with the gear pump so that a suction amount of the fluid per unit time becomes equal to a first suction amount in order to discharge fluid from the nozzle; and continuously afterwards, suctions fluid from the cap device by changing the suction amount of the fluid per unit time from the first suction amount to a smaller second suction amount, wherein the gear pump is driven at a first rotation speed so that the fluid in the cap device is suctioned in the first suction amount, and continuously afterwards, driven at a second rotation speed, which is lower than the first rotation speed, so that the fluid in the cap device is suctioned in the second suction amount.