Patent ID: 8162464
Filing Date: 2012-04-24
Classification: B41J

Abstract:
1. A liquid ejection apparatus, comprising: a head for ejecting liquid; a subtank for storing liquid to be supplied to the head, wherein the subtank includes a space for air; an air communication valve for opening or closing a passage for communicating air in the subtank; a first passage for supplying liquid from the subtank to the head; a second passage for returning liquid from the head to the subtank; pumping means coupled to the first passage for circulating liquid between the head and the subtank; and controlling means for controlling the air communication valve and the pumping means so that the pumping means is driven after closing the air communication valve, so as to circulate liquid, and wherein the controlling means opens the air communication valve to communicate air in the subtank simultaneously with or immediately after the stoppage of the pumping means.