Patent ID: 7578584
Filing Date: 2009-08-25
Classification: B41J

Abstract:
1. An ink cartridge, comprising: a cartridge case enclosing an ink chamber; a path extending from the ink chamber to an exterior of the ink cartridge; a valve member provided in the path, the valve member having a first state in which communication between the ink chamber and the exterior of the ink cartridge along the path is permitted and a second state in which communication between the ink chamber and the exterior of the ink cartridge along the path is prevented; and an extraction receiving member comprising an insertion port that forms a portion of the path, the extraction receiving member being capable of receiving a hollow ink extraction member of an inkjet recording device when the ink cartridge is installed in the inkjet recording device; wherein: the insertion port decreases in diameter from an exterior-side surface to a seal portion located between the exterior-side surface and an ink chamber-side surface, the insertion port having a diameter less than a diameter of the ink extraction member at the seal portion; when the extraction receiving member receives the ink extraction member, the valve member is moved from the second state to the first state; the ink chamber-side surface of the extraction receiving member comprises at least one protrusion that contacts an exterior-side surface of the valve member; and the at least one protrusion protrudes from a pedestal surface located between the protrusion and the sealing portion, the pedestal surface being substantially perpendicular to a direction in which the ink extraction member is inserted into the extraction receiving member.