Tank and liquid consuming apparatus including the same

A tank configured to be installed in a liquid consuming apparatus having a liquid consuming unit, the tank comprising:

• a casing having a first partition wall defining a first storage chamber configured to store liquid and a second partition wall defining a second storage chamber configured to store the liquid,
• wherein the casing is formed with:
• an inlet provided to inject the liquid into the first storage chamber and the second storage chamber;
• a communication port communicating the first storage chamber and the second storage chamber;
• an atmosphere opening port communicating the second storage chamber and the outside of the tank;
• and a liquid outflow port through which the liquid stored in the first storage chamber and the second storage chamber flows out toward the liquid consuming unit, and
• with the tank in a usable posture, the second storage chamber includes a lower storage chamber formed below the first storage chamber, and an upper storage chamber extending upward from the lower storage chamber and being in communication with the atmosphere opening port,
• the first partition wall has a first surface forming a lower surface of the first storage chamber,
• the second partition wall has a second surface forming an upper surface of the lower storage chamber,
• the communication port is formed in the first surface and the second surface,
• the liquid outflow port is formed in a lower portion of the lower storage chamber,
• the first surface is inclined such that the communication port is positioned at the lowermost end, and
• the second surface is inclined such that the communication port is positioned at the lowermost end and a boundary position between the lower storage chamber and the upper storage chamber is positioned at the uppermost end.