Patent ID: 7918548

Claim:
An ink cartridge, comprising: a case comprising: a first case member comprising a first wall having a first end and a second end opposite the first end, a first sidewall extending from the first end of the first wall forming a first angle between the first sidewall and the first wall, and a second sidewall which is opposite to the first sidewall and extends from the second end of the first wall forming a second angle between the second sidewall and the first wall, wherein the first wall comprises an air intake portion and an ink supply portion; and a second case member welded to the first case member, wherein the first case member and the second case member define an ink chamber therein, wherein the second case member comprises: a second wall which is opposite to the first wall and has a first end and a second end, wherein the first sidewall is welded to the first end of the second wall, and the second sidewall is welded to the second end of the second wall; and a support member connected to an interior surface of the second wall, wherein the first wall comprises an inner surface facing the ink chamber and an outer surface opposite the inner surface and facing an exterior of the case, and each of the ink supply portion and the air intake portion extends from the outer surface of the first wall away from the ink chamber; and a pair of contact members connected to the interior surface of the second wall, each configured to contact a corresponding one of a pair of inner surfaces of the first sidewall and the second sidewall; and a movable member, wherein the movable member is connected to the support member.