Patent ID: 8481230

Claim:
A liquid tank comprising: a tank body into which a liquid is enclosed; and a tubular structure provided in the tank body, and having a duct line extending from a specific position in the tank body in a direction toward two or more apexes, sides, or faces of the tank body, wherein the duct line includes a plurality of ends that are contacted with the apexes, the sides, or the faces of the tank body and each have a liquid inlet, and wherein the tubular structure allows entrance of the liquid to duct line only at the ends of the duct line, an inner structure having voids through which the liquid passes in the tubular structure, wherein the voids have an average pore diameter with which the liquid is able to be suctioned from the inlet to the specific position by capillary force, and wherein the specific position is provided with a connection hole and a needle connects the connection hole through an opening of the tank body.