Patent ID: 7588326

Claim:
An inkjet recording apparatus comprising: a detachable ink tank adapted to accommodate ink; a recording head; an ink supply unit from which the detachable ink tank is attachable to and detachable from; a first hollow needle disposed in the ink supply unit and configured to communicate with the detachable ink tank when the detachable ink tank is attached; an ink supply path configured to have the first hollow needle communicate with the recording head; an atmosphere communication port disposed in the ink supply unit and configured to have an atmosphere communication path communicates with the atmosphere; a movable plate disposed in the ink supply unit, the movable plate being biased to the bottom surface of the ink supply unit by a spring, and configured to move downward when the detachable ink tank is attached to the ink supply unit; and a seal member disposed in the movable plate, the seal member being configured to move to a position where the atmosphere communication port is sealed when the detachable ink tank is detached to the ink supply unit, and to be separate from the atmosphere communication port when the detachable ink tank is attached from the ink supply unit, such that the atmosphere communication path communicates with the atmosphere communication port.